BOSTON SYMPHONY ORCHESTRA INC: Form 990, tax year 2024

View the entire original 990 at ProPublica ↗

Organization: BOSTON SYMPHONY ORCHESTRA INC (EIN 04-2103550)
Tax period: 2024-09-01 to 2025-08-31
Filed: 2026-07-13
IRS object ID: 202611959349301711
Schema version: 2024v5.0
Source: Download XML · Original 990 at ProPublica

Every field in the e-filed return. Faint text is the IRS element name, for citing.

Return header
Form 990
Schedule A
Schedule B
Schedule C
Schedule D
Schedule F
Schedule G
Schedule J
Schedule M
Schedule O
Schedule R

Return header ReturnHeader

Field	Value	IRS element (for citing)
Return	2026-07-13T10:51:42-07:00	ReturnTs
Tax Period End	2025-08-31	TaxPeriodEndDt
Return Type	990	ReturnTypeCd
Tax Period Begin	2024-09-01	TaxPeriodBeginDt

Filer Filer

Field	Value	IRS element (for citing)
EIN	042103550	EIN

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	BOSTON SYMPHONY ORCHESTRA INC	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Business Name Control	BOST	BusinessNameControlTxt
Phone	6172661492	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	301 Massachusetts Avenue	AddressLine1Txt
City	Boston	CityNm
State Abbreviation	MA	StateAbbreviationCd
ZIP	02115	ZIPCd

Business Officer BusinessOfficerGrp

Field	Value	IRS element (for citing)
Person	Sok Cheng Soh	PersonNm
Person Title	Chief Financial Officer	PersonTitleTxt
Phone	6176389211	PhoneNum
Signature	2026-07-13	SignatureDt

Field	Value	IRS element (for citing)
IRS Responsible Prty Info Curr	Yes (1)	IRSResponsiblePrtyInfoCurrInd
Tax	2024	TaxYr
Build TS	2025-03-06 01:10:19Z	BuildTS

Form 990 IRS990

Field	Value	IRS element (for citing)
Principal Officer	Chad Smith	PrincipalOfficerNm

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	301 Massachusetts Avenue	AddressLine1Txt
City	Boston	CityNm
State Abbreviation	MA	StateAbbreviationCd
ZIP	02115	ZIPCd

Field	Value	IRS element (for citing)
Gross Receipts	$231,095,516	GrossReceiptsAmt
Group Return For Affiliates	0	GroupReturnForAffiliatesInd
Organization501c3	Yes (X)	Organization501c3Ind
Website Address	www.bso.org	WebsiteAddressTxt
Type Of Organization Corp	Yes (X)	TypeOfOrganizationCorpInd
Formation	1918	FormationYr
Legal Domicile State	MA	LegalDomicileStateCd
Activity Or Mission	The mission of the Boston Symphony Orchestra (BSO) is to foster and maintain an organization dedicated to the making of music consonant with the highest aspirations of the musical art, creating performances and providing educational and training programs at the highest level of excellence.	ActivityOrMissionDesc
Voting Members Governing Body	42	VotingMembersGoverningBodyCnt
Voting Members Independent	42	VotingMembersIndependentCnt
Total Employee	1051	TotalEmployeeCnt
Total Volunteers	1179	TotalVolunteersCnt
Total Gross UBI	$3,711,962	TotalGrossUBIAmt
Net Unrelated Bus Txbl Incm	$2,408,083	NetUnrelatedBusTxblIncmAmt
PY Contributions Grants	$37,094,136	PYContributionsGrantsAmt
CY Contributions Grants	$59,254,623	CYContributionsGrantsAmt
PY Program Service Revenue	$46,687,116	PYProgramServiceRevenueAmt
CY Program Service Revenue	$51,015,218	CYProgramServiceRevenueAmt
PY Investment Income	$25,818,883	PYInvestmentIncomeAmt
CY Investment Income	$38,141,082	CYInvestmentIncomeAmt
PY Other Revenue	$7,490,832	PYOtherRevenueAmt
CY Other Revenue	$7,011,353	CYOtherRevenueAmt
PY Total Revenue	$117,090,967	PYTotalRevenueAmt
CY Total Revenue	$155,422,276	CYTotalRevenueAmt
PY Grants And Similar Paid	$40,000	PYGrantsAndSimilarPaidAmt
CY Grants And Similar Paid	$0	CYGrantsAndSimilarPaidAmt
PY Benefits Paid To Members	$0	PYBenefitsPaidToMembersAmt
CY Benefits Paid To Members	$0	CYBenefitsPaidToMembersAmt
PY Salaries Comp Emp Bnft Paid	$63,941,333	PYSalariesCompEmpBnftPaidAmt
CY Salaries Comp Emp Bnft Paid	$67,900,639	CYSalariesCompEmpBnftPaidAmt
PY Total Prof Fndrsng Expns	$372,643	PYTotalProfFndrsngExpnsAmt
CY Total Prof Fndrsng Expns	$377,045	CYTotalProfFndrsngExpnsAmt
CY Total Fundraising Expense	$8,162,012	CYTotalFundraisingExpenseAmt
PY Other Expenses	$59,370,134	PYOtherExpensesAmt
CY Other Expenses	$59,647,316	CYOtherExpensesAmt
PY Total Expenses	$123,724,110	PYTotalExpensesAmt
CY Total Expenses	$127,925,000	CYTotalExpensesAmt
PY Revenues Less Expenses	-$6,633,143	PYRevenuesLessExpensesAmt
CY Revenues Less Expenses	$27,497,276	CYRevenuesLessExpensesAmt
Total Assets BOY	$680,310,474	TotalAssetsBOYAmt
Total Assets EOY	$737,735,787	TotalAssetsEOYAmt
Total Liabilities BOY	$61,931,986	TotalLiabilitiesBOYAmt
Total Liabilities EOY	$35,937,709	TotalLiabilitiesEOYAmt
Net Assets Or Fund Balances BOY	$618,378,488	NetAssetsOrFundBalancesBOYAmt
Net Assets Or Fund Balances EOY	$701,798,078	NetAssetsOrFundBalancesEOYAmt
Mission	The mission of the Boston Symphony Orchestra (BSO) is to foster and maintain an organization dedicated to making music consonant with the highest aspirations of the musical art, creating performances and providing educational and training programs at the highest level of excellence.	MissionDesc
Significant New Program Srvc	0	SignificantNewProgramSrvcInd
Significant Change	0	SignificantChangeInd
Expense	$84,109,344	ExpenseAmt
Grant	$0	GrantAmt
Revenue	$50,556,863	RevenueAmt
Desc	Orchestral Music Programs: Internationally recognized as one of the finest orchestras, its scope of activities makes it one of the world's busiest orchestral organizations. Within the U.S., it is the fourth-largest performing arts institution. Between September 5, 2024, and May 3, 2025, the Boston Symphony Orchestra reached over 140,000 attendees accross more than 80 concerts in Symphony Hall, which included BSO commissions, overlooked works from the past, and core works of the classical canon. The orchestra was joined by remarkable soloists who included Yo-Yo Ma, Yefim Bronfman, Yuja Wang, Lang Lang, Dashon Burton, Renese King, Seong-Jin Cho, and Ravi Coltrane. Works by Carlos Simon, Gabriela Ortiz, Aleksandra Vrebalov, Adolphus Hailstork, Hannah Kendall, Sarah Kirkland Snider, and Chen Yi brought vital, new voices to Boston. Of note, over three weeks in January, the BSO performed all of the Beethoven symphonies. Other highlights included towering performances of Mahler's Symphony No. 8 Symphony of a Thousand, a rare performance of Korngold's opera Die Tote Stadt, Mozart's Requiem, a revisiting of Shostakovich's major concertos and symphonies, and a tribute to John Coltrane with his son Ravi Coltrane on the saxophone. In May, the orchestra toured Vienna, Prague, Riga, and was the featured guest at the Gewandhaus Orchestra's Shostakovich Festival in Leipzig. In each city, they performed all-Shostakovich programs marking the 50th anniversary of the composer's death. Keith Lockhart and the Boston Pops completed another banner year. New approaches to programs, which included Pride and Gospel Nights, and Dia de Muertos were well-received with over 7,500 people in attendance. Keith Lockhart tirelessly led 40+ Holiday Pops concerts. In the spring, the Pops gave wildly popular performances with Cynthia Erivo, celebrations of music by the Grateful Dead, and a joy-filled celebration of Keith Lockhart's 30 years as Pops Conductor. Pops performances had over 118,000 people in attendance. Tanglewood opened with an all-Rachmaninoff program featuring Daniil Trifonov and for 10 weeks, the campus was filled with music reaching around 300,000 attendees through concerts and events by the BSO, Pops, guest ensembles, Popular Artists, and the Tanglewood Music Center (TMC) Fellows-a new generation of musicians. Tanglewood audiences were introduced to conductor Elim Chan and two important violinists Maria Dueñas and Pekka Kuusisto. Audiences enthusiastically welcomed back Emanuel Ax, Joshua Bell, Yuja Wang, Lang Lang, and Yo-Yo Ma. Music by Gabriella Smith and Gabriela Ortiz, world premieres by Carlos Simon and John Williams were performed alongside works by Beethoven, Mendelssohn, and Puccini. The Popular Artists Series welcomed such headliners as Jon Batiste, Bonnie Raitt, and Barenaked Ladies. The BSO and Yo-Yo Ma created a series of sold-out events at Tanglewood that asked What is Music For? Participants included Mr. Ma, art critic Sebastian Smee, historian Heather Cox Richardson, folk musician Sam Amidon, Leonidas Kavakos, Emanuel Ax, and On Being's Krista Tippett in conversation with D. Graham Burnett on AI and the future of the humanities.	Desc

Prog Srvc Accom Acty2 ProgSrvcAccomActy2Grp

Field	Value	IRS element (for citing)
Expense	$4,438,443	ExpenseAmt
Grant	$0	GrantAmt
Revenue	$488,120	RevenueAmt
Desc	Education and community programs are integral to the BSO's mission. In Boston:Over 3,700 high school students attended one of the BSO's High School Open Rehearsals, where students from grades 9 - 12 got a singular look at professional music-making as they observed the orchestra, conductor, and guest artists prepare for the evening's performance. Conductor-cams allow students to study the subtle communications that occur between the conductor and musicians, providing additional insight into the art-making process. Classes traveled to Symphony Hall from across Boston, the metropolitan area, western MA, CT, and NH. For three days in March, Symphony Hall was filled with approximately 7,000 2nd - 8th grade students from 59 schools. Many were studying music and 20% were either English Language or Special Education classes. Classes that came early or could stay after, met a musician and learned about their instrument and their life as a professional. The Youth Concerts offered a musical illustration of the various tools that composers use to create a symphony. Conductor Thomas Wilkins used musical selections by Stravinsky, Shostakovich, Margaret Bonds, Carlos Simon, and Grieg to explore melody, rhythm, harmony, and orchestration. The BSO's two Sensory Friendly Concerts created a welcoming space for almost 2,000 people with autism and their caretakers to enjoy the Boston Pops and Boston Symphony Orchestra by making multiple accommodations. These included halving the number of tickets sold to reduce over-stimulation and lowering ticket prices to remove financial barriers to participation. The BSO adjusts lighting and sound levels, creates a relaxed and inclusive atmosphere, offers tactile pre-concert activities, ASL interpretation, and has autism therapists on hand. The BSO began participating in Boston Family Days, a city-led effort to welcome Boston's students into its pre-eminent cultural institutions. A number of Boston students and their families were the BSO's guests for a Boston Pops Music of the Cosmos concert. The Pops performed music by Ravel, Holst and film scores accompanied by soaring video of space exploration, including footage of the International Space Station (ISS) with commentary by special guests George Takei from Star Trek and astronaut Suni Williams, who recently returned from the ISS. Families were invited to meet these two remarkable individuals after the concert. During FY25, the BSO tested new programming ideas that energized audiences and reached new communities. Its annual Concert for the City showcased numerous local musical ensembles, put the spotlight on Mayor Wu as the soloist in Gershwin's Rhapsody in Blue, and introduced community members to the BSO's named conductors: Andris Nelsons, Keith Lockhart, Thomas Wilkins, and James Burton. The Harvard Crimson wrote that the concert proved "that the symphony exists for the people of Boston." The Boston Pops' first El Día de Muertos/Day of the Dead celebration featured East Boston musician Veronica Robles and her Mariachi Band and guitarist Zaira Meneses. In partnership with the Greater Roxbury Arts and Culture Center, the BSO gave a free all-Ellington concert at Mission Hill's Basilica, bringing music to a predominantly Haitian neighborhood. The setting was perfect for selections from Ellington's Sacred Songs, which re-imagined church oratorio drawing from jazz, gospel, the blues, and spirituals. To honor veterans, the Boston Pops gave a free Holiday Pops Military Preview performance for approximately 2,000 veterans, their families, and active service members, filling the Hall with joy and sending a powerful message of appreciation for these men and women. A small ensemble of musicians of the Boston Pops and singers from the Tanglewood Festival Chorus brought holiday cheer to patients at Franciscan's Children's hospital and to Spaulding Rehabilitation Hospital. In Boston, approximately 20,000 children, high school and college students, adults under the age of 40, veterans, MA public school teachers, health care workers, and people who are eligible for public benefits attended concerts thanks to free and discounted tickets. In Tanglewood, over 6,000 people under age 18 attended BSO concerts on the lawn for free. Over 1,400 people enjoyed Tanglewood's Family Concert conducted by Thomas Wilkins and other free events such as Berkshire Night were available to the local community. Other opportunities for families included the live performances by the popular children's podcast Circle Round, new TLI programs for families, as well as outdoor games, crafts, and a chance to try out different instruments of the orchestra on weekends. This year, TLI started something new. Between September and June, each month a local organization that provides critical support to residents (e.g., food pantries, healthcare, affordable housing) was invited to attend a concert. Representatives from each group had time to talk about needs in the community and how they address them. The groups appreciated the chance to connect with TLI attendees and concertgoers appreciated hearing more directly about the issues many locals face. TLI arranged for the four German musicians that form the Arcis Saxophone Quartet to give a rousing performance at Lenox Memorial Middle School for students and members of the High School band. Although the students live in Lenox, most had never heard a professional ensemble play before. After the internationally acclaimed Akropolis Reed Quintet performed at TLI, they gave a performance and workshop at Drury High School. Sixty students were part of this special event that showcased the group's inventive approach to chamber music and captivated students and staff with their energy and artistry. The performance was followed by a hands-on workshop with Drury's band students where the students played alongside the ensemble. The Tanglewood Music Center continues to be a vital pre-professional milestone for the most talented young musicians from around the globe. With a 7% acceptance rate this year, fellows came from 17 countries and 26 states. These young musicians gave 30 concerts, mastering a wide range of repertoire and worked with Andris Nelsons, Dima Slobodeniouk, Thomas Ades, and Thomas Wilkins. The TMC's Festival of Contemporary Music crossed borders of time and space in a six-concert look at contemporary Mexican music curated by Gabriela Ortiz, Mexico's most prominent living composers.	Desc

Prog Srvc Accom Acty3 ProgSrvcAccomActy3Grp

Field	Value	IRS element (for citing)
Expense	$16,111,055	ExpenseAmt
Grant	$0	GrantAmt
Revenue	$3,191,541	RevenueAmt
Desc	The BSO's two main properties, Symphony Hall and Tanglewood, have long and significant histories and attract visitors from near and far. Symphony Hall's acoustic qualities have earned it a place among the top concert auditoriums in the world, a fact underscored by the Hall's 1999 designation as a National Historic Landmark. Symphony Hall resonates with more than a century of performances by key artists. It is also a key performance venue for a number of other ensembles and presenters, including the Handel and Haydn Society, the Celebrity Series of Boston, Boston Speakers Series, and the Boston Youth Symphony Orchestra. The Hall seats approximately 2,600. Located in the Berkshire hills of Lenox, Massachusetts and established in 1936 by the BSO's Music Director Serge Koussevitzky, Tanglewood is a world-renowned summer music festival. Its performance venues-Koussevitzky Music Shed, Seiji Ozawa Concert Hall, and Linde Center-and 80+ ancillary buildings are located on 425 pastoral acres. Built in 1938, the Koussevitzky Music Shed is an opened-sided hall with over 5,000 seats; just under 13,000 can be accommodated on the surrounding lawn. Opened in 1994, Seiji Ozawa Hall is a brick and wood structure that provides a more intimate concert experience and is often used for performances by the Tanglewood Music Center. It seats approximately 1,000 audience members, in addition to potentially hundreds more on the lawn. When not being used by the orchestra, the BSO rents Symphony Hall to others including Celebrity Series, Handel and Haydn Society, Boston Speakers Series, to name a few. Local high schools and Berkshire Community College use the Koussevitzky Shed for graduations and community groups, including the Stockbridge Library and Austin Riggs use Tanglewood's Linde Center during the fall, winter, and spring.	Desc

Prog Srvc Accom Acty Other ProgSrvcAccomActyOtherGrp (2 entries)

ExpenseExpenseAmt	GrantGrantAmt	RevenueRevenueAmt	DescDesc
$0	$0	$204,833	The BSO's music is shared with several hundred thousand through recordings, television, radio and online broadcasts. Every Saturday evening, Classical Radio Boston (a subsidiary of GBH public broadcasting) broadcasts a BSO concert. These concerts are available to stream via the GBH website for a month after they are aired. During Tanglewood, CRB-Classical and WAMC Northeast Public Radio broadcast BSO Friday and Saturday evening performances, and Sunday afternoon concerts reaching audiences across seven mid-Atlantic and New England states. Additionally, the BSO released numerous CDs this year including a 19-CD box set of its award-winning Shostakovich cycle under Music Director Andris Nelsons, as well as Ravel: The Piano Concertos with pianist Seong-Jin Cho, Shostakovich: The Cello Concertos with Yo-Yo Ma, Shostakovich: The Piano Concertos with Yuja Wang, and Messiaen's Turangalila Symphony with Yuja Wang.
$12,037	$0	$15,583	The BSO operated its Symphony Hall retail operations during concert days and its Tanglewood retail shops in summer 2025.

Field	Value	IRS element (for citing)
Total Other Prog Srvc Expense	$12,037	TotalOtherProgSrvcExpenseAmt
Total Other Prog Srvc Grant	$0	TotalOtherProgSrvcGrantAmt
Total Other Prog Srvc Revenue	$220,416	TotalOtherProgSrvcRevenueAmt
Total Program Service Expenses	$104,670,879	TotalProgramServiceExpensesAmt
Described In Section501c3	Yes (1)	DescribedInSection501c3Ind
Schedule B Required	Yes (1)	ScheduleBRequiredInd
Political Campaign Acty	0	PoliticalCampaignActyInd
Lobbying Activities	Yes (1)	LobbyingActivitiesInd
Subject To Proxy Tax	0	SubjectToProxyTaxInd
Donor Advised Fund	0	DonorAdvisedFundInd
Conservation Easements	0	ConservationEasementsInd
Collections Of Art	0	CollectionsOfArtInd
Credit Counseling	0	CreditCounselingInd
Donor Rstr Or Quasi Endowments	Yes (1)	DonorRstrOrQuasiEndowmentsInd
Report Land Building Equipment	Yes (1)	ReportLandBuildingEquipmentInd
Report Investments Other Sec	Yes (1)	ReportInvestmentsOtherSecInd
Report Program Related Invst	0	ReportProgramRelatedInvstInd
Report Other Assets	Yes (1)	ReportOtherAssetsInd
Report Other Liabilities	Yes (1)	ReportOtherLiabilitiesInd
Include FIN48 Footnote	Yes (1)	IncludeFIN48FootnoteInd
Independent Audit Fincl Stmt	0	IndependentAuditFinclStmtInd
Consolidated Audit Fincl Stmt	Yes (1)	ConsolidatedAuditFinclStmtInd
School Operating	0	SchoolOperatingInd
Foreign Office	0	ForeignOfficeInd
Foreign Activities	Yes (1)	ForeignActivitiesInd
More Than5000 K To Org	0	MoreThan5000KToOrgInd
More Than5000 K To Individuals	0	MoreThan5000KToIndividualsInd
Professional Fundraising	Yes (1)	ProfessionalFundraisingInd
Fundraising Activities	Yes (1)	FundraisingActivitiesInd
Gaming Activities	0	GamingActivitiesInd
Operate Hospital	0	OperateHospitalInd
Grants To Organizations	0	GrantsToOrganizationsInd
Grants To Individuals	0	GrantsToIndividualsInd
Schedule J Required	Yes (1)	ScheduleJRequiredInd
Tax Exempt Bonds	0	TaxExemptBondsInd
Engaged In Excess Benefit Trans	0	EngagedInExcessBenefitTransInd
PY Excess Benefit Trans	0	PYExcessBenefitTransInd
Loan Outstanding	0	LoanOutstandingInd
Grant To Related Person	0	GrantToRelatedPersonInd
Business Rln With Org Mem	0	BusinessRlnWithOrgMemInd
Business Rln With Fam Mem	0	BusinessRlnWithFamMemInd
Business Rln With35 Ctrl Ent	0	BusinessRlnWith35CtrlEntInd
Deductible Non Cash Contri	Yes (1)	DeductibleNonCashContriInd
Deductible Art Contribution	0	DeductibleArtContributionInd
Terminate Operations	0	TerminateOperationsInd
Partial Liquidation	0	PartialLiquidationInd
Disregarded Entity	0	DisregardedEntityInd
Related Entity	Yes (1)	RelatedEntityInd
Related Organization Ctrl Ent	Yes (1)	RelatedOrganizationCtrlEntInd
Transaction With Control Ent	Yes (1)	TransactionWithControlEntInd
Trnsfr Exmpt Non Chrtbl Rltd Org	0	TrnsfrExmptNonChrtblRltdOrgInd
Activities Conducted Prtshp	0	ActivitiesConductedPrtshpInd
Schedule O Required	Yes (1)	ScheduleORequiredInd
IRP Document	479	IRPDocumentCnt
IRP Document W2 G	0	IRPDocumentW2GCnt
Backup Wthld Compliance	Yes (1)	BackupWthldComplianceInd
Employee	1051	EmployeeCnt
Employment Tax Returns Filed	Yes (1)	EmploymentTaxReturnsFiledInd
Unrelated Bus Incm Over Limit	Yes (1)	UnrelatedBusIncmOverLimitInd
Form990 T Filed	Yes (1)	Form990TFiledInd
Foreign Financial Account	0	ForeignFinancialAccountInd
Prohibited Tax Shelter Trans	0	ProhibitedTaxShelterTransInd
Taxable Party Notification	0	TaxablePartyNotificationInd
Nondeductible Contributions	0	NondeductibleContributionsInd
Quid Pro Quo Contributions	Yes (1)	QuidProQuoContributionsInd
Quid Pro Quo Contri Discl	Yes (1)	QuidProQuoContriDisclInd
Form8282 Property Disposed Of	0	Form8282PropertyDisposedOfInd
Rcv Fnds To Pay Prsnl Bnft Cntrct	0	RcvFndsToPayPrsnlBnftCntrctInd
Pay Premiums Prsnl Bnft Cntrct	0	PayPremiumsPrsnlBnftCntrctInd
Indoor Tanning Services	0	IndoorTanningServicesInd
Subj To Tax Rmnrtn Ex Prcht Pymt	Yes (1)	SubjToTaxRmnrtnExPrchtPymtInd
Subject To Excs Tax Net Invst Inc	0	SubjectToExcsTaxNetInvstIncInd
Info In Schedule O Part VI	Yes (X)	InfoInScheduleOPartVIInd
Governing Body Voting Members	42	GoverningBodyVotingMembersCnt
Independent Voting Member	42	IndependentVotingMemberCnt
Family Or Business Rln	0	FamilyOrBusinessRlnInd
Delegation Of Mgmt Duties	0	DelegationOfMgmtDutiesInd
Change To Org Documents	0	ChangeToOrgDocumentsInd
Material Diversion Or Misuse	0	MaterialDiversionOrMisuseInd
Members Or Stockholders	0	MembersOrStockholdersInd
Election Of Board Members	0	ElectionOfBoardMembersInd
Decisions Subject To Approva	0	DecisionsSubjectToApprovaInd
Minutes Of Governing Body	Yes (1)	MinutesOfGoverningBodyInd
Minutes Of Committees	Yes (1)	MinutesOfCommitteesInd
Officer Mailing Address	0	OfficerMailingAddressInd
Local Chapters	0	LocalChaptersInd
Form990 Provided To Gvrn Body	Yes (1)	Form990ProvidedToGvrnBodyInd
Conflict Of Interest Policy	Yes (1)	ConflictOfInterestPolicyInd
Annual Disclosure Covered Prsn	Yes (1)	AnnualDisclosureCoveredPrsnInd
Regular Monitoring Enfrc	Yes (1)	RegularMonitoringEnfrcInd
Whistleblower Policy	Yes (1)	WhistleblowerPolicyInd
Document Retention Policy	Yes (1)	DocumentRetentionPolicyInd
Compensation Process CEO	Yes (1)	CompensationProcessCEOInd
Compensation Process Other	Yes (1)	CompensationProcessOtherInd
Investment In Joint Venture	0	InvestmentInJointVentureInd
States Where Copy Of Return Is Fld	CA	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	MA	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	NJ	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	NY	StatesWhereCopyOfReturnIsFldCd
Upon Request	Yes (X)	UponRequestInd

Books In Care Of Detail BooksInCareOfDetail

Field	Value	IRS element (for citing)
Person	Katherine Decelles	PersonNm
Phone	6176389215	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	301 Massachusetts Avenue	AddressLine1Txt
City	Boston	CityNm
State Abbreviation	MA	StateAbbreviationCd
ZIP	02115	ZIPCd

Field	Value	IRS element (for citing)
Info In Schedule O Part VII	Yes (X)	InfoInScheduleOPartVIIInd

Form990 Part VII Section A Form990PartVIISectionAGrp (53 entries)

TitleTitleTxt	Average Hours Per WeekAverageHoursPerWeekRt	Average Hours Per Week Rltd OrgAverageHoursPerWeekRltdOrgRt	OfficerOfficerInd	Reportable Comp From OrgReportableCompFromOrgAmt	Reportable Comp From Rltd OrgReportableCompFromRltdOrgAmt	Other CompensationOtherCompensationAmt	Highest Compensated EmployeeHighestCompensatedEmployeeInd	Former Ofcr Director TrusteeFormerOfcrDirectorTrusteeInd	Individual Trustee Or DirectorIndividualTrusteeOrDirectorInd
Chad Smith
President & Chief Executive Officer	50	1.00	Yes (X)	$1,318,099	$0	$53,255
Tamara Smirnova
First Violin	40			$594,215	$0	$13,099	Yes (X)
Maureen Flores
Chief Development Officer	0	0		$518,514	$0	$20,144		Yes (X)
Alexander Velinzon
Associate Concertmaster	40			$467,278	$0	$50,954	Yes (X)
Timothy Genis
Timpani	40			$419,187	$0	$0	Yes (X)
John A Ferrillo Jr
Principal Oboe	40			$377,859	$0	$34,444	Yes (X)
Thomas Rolfs Jr
Principal Trumpet	40			$372,495	$0	$32,314	Yes (X)
Paul Eric Krauss
Chief Financial Officer, thru July 2025	50.00	1.00	Yes (X)	$314,556	$0	$48,252
Katherine Decelles
Controller	40	1.00		$218,873	$0	$19,317		Yes (X)
Joseph Kamay
Clerk	40	1	Yes (X)	$89,995	$0	$10,165
Noubar Afeyan
Trustee	2			$0	$0	$0			Yes (X)
David Altshuler
Trustee	2			$0	$0	$0			Yes (X)
Holly Ambler
Trustee	2			$0	$0	$0			Yes (X)
Ted Berk
Trustee, ex-officio	2			$0	$0	$0			Yes (X)
William N Booth
Trustee	2			$0	$0	$0			Yes (X)
Gregory E Bulger
Trustee	2			$0	$0	$0			Yes (X)
Ronald G Casty
Trustee	2			$0	$0	$0			Yes (X)
Susan Bredhoff Cohen
Trustee	2			$0	$0	$0			Yes (X)
Richard F Connolly Jr
Trustee	2			$0	$0	$0			Yes (X)
Angela Q Crispi
Trustee	2			$0	$0	$0			Yes (X)
William Curry MD
Trustee	2			$0	$0	$0			Yes (X)
Lynn A Dale
Trustee	2			$0	$0	$0			Yes (X)
Phillip J Edmundson
Trustee	2			$0	$0	$0			Yes (X)
Thomas E Faust Jr
Trustee	2			$0	$0	$0			Yes (X)
Todd R Golub
Trustee	2			$0	$0	$0			Yes (X)
Reverend Dr Ray Hammond
Trustee	2			$0	$0	$0			Yes (X)
Nathan Hayward III
Trustee	2			$0	$0	$0			Yes (X)
Ricki Tigert Helfer
Trustee	2			$0	$0	$0			Yes (X)
Albert A Holman III
Trustee	2			$0	$0	$0			Yes (X)
Barbara W Hostetter
Chair	2			$0	$0	$0			Yes (X)
David C Howse
Trustee	2			$0	$0	$0			Yes (X)
Giselle J Joffre
Trustee	2			$0	$0	$0			Yes (X)
Stephen W Kidder
Trustee	2			$0	$0	$0			Yes (X)
Tom Kuo
Trustee	2			$0	$0	$0			Yes (X)
Jeffrey Leiden MD PhD
Trustee	2			$0	$0	$0			Yes (X)
John M Loder
Vice Chair	2			$0	$0	$0			Yes (X)
Nancy K Lubin
Trustee	2			$0	$0	$0			Yes (X)
Joshua A Lutzker
Treasurer	2			$0	$0	$0			Yes (X)
Pamela L Peedin
Trustee	2			$0	$0	$0			Yes (X)
M Lee Pelton
Trustee	2			$0	$0	$0			Yes (X)
Steven R Perles
Trustee	2			$0	$0	$0			Yes (X)
Lina S Plantilla MD
Trustee	2			$0	$0	$0			Yes (X)
Andrew S Plump
Trustee	2			$0	$0	$0			Yes (X)
Sean C Rush
Trustee	2			$0	$0	$0			Yes (X)
Wendy Shattuck
Trustee	2			$0	$0	$0			Yes (X)
Nicole M Stata
Trustee	2			$0	$0	$0			Yes (X)
Theresa M Stone
Trustee	2			$0	$0	$0			Yes (X)
Caroline Taylor
Trustee	2			$0	$0	$0			Yes (X)
Dr Christoph Westphal
Trustee	2			$0	$0	$0			Yes (X)
Jenny Williams
Trustee	2			$0	$0	$0			Yes (X)
Joanna Wu - as of Oct 2024
Trustee, ex-officio	2			$0	$0	$0			Yes (X)
D Brooks Zug
Trustee	2			$0	$0	$0			Yes (X)
Sok Cheng Soh
Chief Financial Officer, beg July 2025	50.00	1.00	Yes (X)	$0	$0	$0

Field	Value	IRS element (for citing)
Total Reportable Comp From Org	$4,691,071	TotalReportableCompFromOrgAmt
Tot Reportable Comp Rltd Org	$0	TotReportableCompRltdOrgAmt
Total Other Compensation	$281,944	TotalOtherCompensationAmt
Indiv Rcvd Greater Than100 K	192	IndivRcvdGreaterThan100KCnt
Former Ofcr Employees Listed	Yes (1)	FormerOfcrEmployeesListedInd
Total Comp Greater Than150 K	Yes (1)	TotalCompGreaterThan150KInd
Compensation From Other Srcs	0	CompensationFromOtherSrcsInd

Contractor Compensation ContractorCompensationGrp (5 entries)

Address Line1ContractorAddress/USAddress/AddressLine1Txt	Address Line2ContractorAddress/USAddress/AddressLine2Txt	CityContractorAddress/USAddress/CityNm	State AbbreviationContractorAddress/USAddress/StateAbbreviationCd	ZIPContractorAddress/USAddress/ZIPCd	ServicesServicesDesc	CompensationCompensationAmt	Address Line1ContractorAddress/ForeignAddress/AddressLine1Txt	Address Line2ContractorAddress/ForeignAddress/AddressLine2Txt	CityContractorAddress/ForeignAddress/CityNm	CountryContractorAddress/ForeignAddress/CountryCd	Foreign PostalContractorAddress/ForeignAddress/ForeignPostalCd
Allen & Gerritsen Inc
125 High Street	Floor 23	Boston	MA	02110	Media strategy	$2,977,145
Boston Gourmet Management
301 Massachusetts Avenue		Boston	MA	02115	Food services	$1,960,011
Andris Nelsons
					Services of A. Nelsons	$1,826,000	Konzertdirektion Schmid	40 St Martins Lane	London	UK	WC2N 4E
Tisbury Tours Inc
360 Hamilton Avenue 100		White Plains	NY	10601	Concert performances	$1,412,554
Allied Universal
Eight Tower Bridge		Conshohocken	PA	19428	Security services	$829,502

Field	Value	IRS element (for citing)
Cntrct Rcvd Greater Than100 K	74	CntrctRcvdGreaterThan100KCnt
Federated Campaigns	$0	FederatedCampaignsAmt
Membership Dues	$0	MembershipDuesAmt
Fundraising	$3,686,631	FundraisingAmt
Related Organizations	$0	RelatedOrganizationsAmt
Government Grants	$200,000	GovernmentGrantsAmt
All Other Contributions	$55,367,992	AllOtherContributionsAmt
Noncash Contributions	$13,689,328	NoncashContributionsAmt
Total Contributions	$59,254,623	TotalContributionsAmt

Program Service Revenue ProgramServiceRevenueGrp (4 entries)

DescDesc	BusinessBusinessCd	Total Revenue ColumnTotalRevenueColumnAmt	Related Or Exempt Func IncomeRelatedOrExemptFuncIncomeAmt	Unrelated Business RevenueUnrelatedBusinessRevenueAmt	ExclusionExclusionAmt
Concerts & Tours	900099	$49,986,448	$49,986,448	$0	$0
Education	900099	$488,120	$488,120	$0	$0
Program advertising	900099	$335,817	$0	$335,817	$0
Electronic media	900099	$204,833	$204,833	$0	$0

Total Oth Program Service Rev TotalOthProgramServiceRevGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$0	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$0	ExclusionAmt

Field	Value	IRS element (for citing)
Total Program Service Revenue	$51,015,218	TotalProgramServiceRevenueAmt

Investment Income InvestmentIncomeGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$4,923,955	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$1,199,933	UnrelatedBusinessRevenueAmt
Exclusion	$3,724,022	ExclusionAmt

Incm From Invest Bond Proceeds IncmFromInvestBondProceedsGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$0	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$0	ExclusionAmt

Royalties Revenue RoyaltiesRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$86,020	TotalRevenueColumnAmt
Related Or Exempt Func Income	$86,020	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$0	ExclusionAmt

Gross Rents GrossRentsGrp

Field	Value	IRS element (for citing)
Real	$6,984,814	RealAmt
Personal	$41,178	PersonalAmt

Less Rental Expenses LessRentalExpensesGrp

Field	Value	IRS element (for citing)
Real	$1,733,510	RealAmt
Personal	$0	PersonalAmt

Rental Income Or Loss RentalIncomeOrLossGrp

Field	Value	IRS element (for citing)
Real	$5,251,304	RealAmt
Personal	$41,178	PersonalAmt

Net Rental Income Or Loss NetRentalIncomeOrLossGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$5,292,482	TotalRevenueColumnAmt
Related Or Exempt Func Income	$3,191,550	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$2,100,932	ExclusionAmt

Gross Amount Sales Assets GrossAmountSalesAssetsGrp

Field	Value	IRS element (for citing)
Securities	$105,185,764	SecuritiesAmt
Other	$0	OtherAmt

Less Cost Oth Basis Sales Expnss LessCostOthBasisSalesExpnssGrp

Field	Value	IRS element (for citing)
Securities	$71,968,637	SecuritiesAmt
Other	$0	OtherAmt

Gain Or Loss GainOrLossGrp

Field	Value	IRS element (for citing)
Securities	$33,217,127	SecuritiesAmt
Other	$0	OtherAmt

Net Gain Or Loss Investments NetGainOrLossInvestmentsGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$33,217,127	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$1,834,296	UnrelatedBusinessRevenueAmt
Exclusion	$31,382,831	ExclusionAmt

Field	Value	IRS element (for citing)
Fundraising Gross Income	$580,909	FundraisingGrossIncomeAmt
Contri Rpt Fundraising Event	$3,686,631	ContriRptFundraisingEventAmt
Fundraising Direct Expenses	$1,222,777	FundraisingDirectExpensesAmt

Net Incm From Fundraising Evt NetIncmFromFundraisingEvtGrp

Field	Value	IRS element (for citing)
Total Revenue Column	-$641,868	TotalRevenueColumnAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	-$641,868	ExclusionAmt

Field	Value	IRS element (for citing)
Gaming Gross Income	$0	GamingGrossIncomeAmt
Gaming Direct Expenses	$0	GamingDirectExpensesAmt

Net Income From Gaming NetIncomeFromGamingGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$0	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$0	ExclusionAmt

Field	Value	IRS element (for citing)
Gross Sales Of Inventory	$1,105,815	GrossSalesOfInventoryAmt
Cost Of Goods Sold	$748,316	CostOfGoodsSoldAmt

Net Income Or Loss NetIncomeOrLossGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$357,499	TotalRevenueColumnAmt
Related Or Exempt Func Income	$15,583	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$341,916	UnrelatedBusinessRevenueAmt
Exclusion	$0	ExclusionAmt

Other Revenue Misc OtherRevenueMiscGrp (3 entries)

DescDesc	BusinessBusinessCd	Total Revenue ColumnTotalRevenueColumnAmt	Related Or Exempt Func IncomeRelatedOrExemptFuncIncomeAmt	Unrelated Business RevenueUnrelatedBusinessRevenueAmt	ExclusionExclusionAmt
Food & beverage	900099	$1,335,902	$0	$0	$1,335,902
Other income	900099	$484,386	$484,386	$0	$0
Parking	900099	$96,932	$0	$0	$96,932

Miscellaneous Revenue MiscellaneousRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$0	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$0	ExclusionAmt

Field	Value	IRS element (for citing)
Other Revenue Total	$1,917,220	OtherRevenueTotalAmt

Total Revenue TotalRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$155,422,276	TotalRevenueColumnAmt
Related Or Exempt Func Income	$54,456,940	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$3,711,962	UnrelatedBusinessRevenueAmt
Exclusion	$37,998,751	ExclusionAmt

Field	Value	IRS element (for citing)
Info In Schedule O Part IX	Yes (X)	InfoInScheduleOPartIXInd

Grants To Domestic Orgs GrantsToDomesticOrgsGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt
Program Services	$0	ProgramServicesAmt

Grants To Domestic Individuals GrantsToDomesticIndividualsGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt
Program Services	$0	ProgramServicesAmt

Foreign Grants ForeignGrantsGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt
Program Services	$0	ProgramServicesAmt

Benefits To Members BenefitsToMembersGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt
Program Services	$0	ProgramServicesAmt

Comp Current Ofcr Directors CompCurrentOfcrDirectorsGrp

Field	Value	IRS element (for citing)
Total	$2,018,090	TotalAmt
Program Services	$1,368,266	ProgramServicesAmt
Management And General	$494,277	ManagementAndGeneralAmt
Fundraising	$155,547	FundraisingAmt

Comp Disqual Persons CompDisqualPersonsGrp

Field	Value	IRS element (for citing)
Total	$109,200	TotalAmt
Program Services	$0	ProgramServicesAmt
Management And General	$0	ManagementAndGeneralAmt
Fundraising	$109,200	FundraisingAmt

Other Salaries And Wages OtherSalariesAndWagesGrp

Field	Value	IRS element (for citing)
Total	$52,997,609	TotalAmt
Program Services	$44,458,483	ProgramServicesAmt
Management And General	$4,217,562	ManagementAndGeneralAmt
Fundraising	$4,321,564	FundraisingAmt

Pension Plan Contributions PensionPlanContributionsGrp

Field	Value	IRS element (for citing)
Total	$3,695,392	TotalAmt
Program Services	$3,141,635	ProgramServicesAmt
Management And General	$343,796	ManagementAndGeneralAmt
Fundraising	$209,961	FundraisingAmt

Other Employee Benefits OtherEmployeeBenefitsGrp

Field	Value	IRS element (for citing)
Total	$5,255,264	TotalAmt
Program Services	$4,080,492	ProgramServicesAmt
Management And General	$659,059	ManagementAndGeneralAmt
Fundraising	$515,713	FundraisingAmt

Payroll Taxes PayrollTaxesGrp

Field	Value	IRS element (for citing)
Total	$3,825,084	TotalAmt
Program Services	$3,054,697	ProgramServicesAmt
Management And General	$435,944	ManagementAndGeneralAmt
Fundraising	$334,443	FundraisingAmt

Fees For Services Management FeesForServicesManagementGrp

Field	Value	IRS element (for citing)
Total	$314,323	TotalAmt
Program Services	$133,996	ProgramServicesAmt
Management And General	$138,129	ManagementAndGeneralAmt
Fundraising	$42,198	FundraisingAmt

Fees For Services Legal FeesForServicesLegalGrp

Field	Value	IRS element (for citing)
Total	$140,341	TotalAmt
Program Services	$3,001	ProgramServicesAmt
Management And General	$130,340	ManagementAndGeneralAmt
Fundraising	$7,000	FundraisingAmt

Fees For Services Accounting FeesForServicesAccountingGrp

Field	Value	IRS element (for citing)
Total	$155,925	TotalAmt
Program Services	$0	ProgramServicesAmt
Management And General	$155,925	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Fees For Services Lobbying FeesForServicesLobbyingGrp

Field	Value	IRS element (for citing)
Total	$99,641	TotalAmt
Program Services	$0	ProgramServicesAmt
Management And General	$0	ManagementAndGeneralAmt
Fundraising	$99,641	FundraisingAmt

Fees For Services Prof Fundraising FeesForServicesProfFundraising

Field	Value	IRS element (for citing)
Total	$377,045	TotalAmt
Fundraising	$377,045	FundraisingAmt

Fees For Srvc Invst Mgmnt Fees FeesForSrvcInvstMgmntFeesGrp

Field	Value	IRS element (for citing)
Total	$1,724,539	TotalAmt
Program Services	$1,724,539	ProgramServicesAmt
Management And General	$0	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Fees For Services Other FeesForServicesOtherGrp

Field	Value	IRS element (for citing)
Total	$19,982,868	TotalAmt
Program Services	$18,056,355	ProgramServicesAmt
Management And General	$1,328,809	ManagementAndGeneralAmt
Fundraising	$597,704	FundraisingAmt

Advertising AdvertisingGrp

Field	Value	IRS element (for citing)
Total	$3,850,712	TotalAmt
Program Services	$3,816,049	ProgramServicesAmt
Management And General	$14,390	ManagementAndGeneralAmt
Fundraising	$20,273	FundraisingAmt

Office Expenses OfficeExpensesGrp

Field	Value	IRS element (for citing)
Total	$1,985,963	TotalAmt
Program Services	$761,122	ProgramServicesAmt
Management And General	$951,515	ManagementAndGeneralAmt
Fundraising	$273,326	FundraisingAmt

Information Technology InformationTechnologyGrp

Field	Value	IRS element (for citing)
Total	$2,825,423	TotalAmt
Program Services	$250,615	ProgramServicesAmt
Management And General	$2,546,029	ManagementAndGeneralAmt
Fundraising	$28,779	FundraisingAmt

Royalties RoyaltiesGrp

Field	Value	IRS element (for citing)
Total	$264,367	TotalAmt
Program Services	$264,367	ProgramServicesAmt
Management And General	$0	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Occupancy OccupancyGrp

Field	Value	IRS element (for citing)
Total	$9,819,030	TotalAmt
Program Services	$8,951,426	ProgramServicesAmt
Management And General	$596,018	ManagementAndGeneralAmt
Fundraising	$271,586	FundraisingAmt

Travel TravelGrp

Field	Value	IRS element (for citing)
Total	$5,123,462	TotalAmt
Program Services	$4,733,888	ProgramServicesAmt
Management And General	$118,892	ManagementAndGeneralAmt
Fundraising	$270,682	FundraisingAmt

Pymt Travel Entrtnmnt Pub Ofcl PymtTravelEntrtnmntPubOfclGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt
Program Services	$0	ProgramServicesAmt
Management And General	$0	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Conferences Meetings ConferencesMeetingsGrp

Field	Value	IRS element (for citing)
Total	$51,873	TotalAmt
Program Services	$33,536	ProgramServicesAmt
Management And General	$6,277	ManagementAndGeneralAmt
Fundraising	$12,060	FundraisingAmt

Interest InterestGrp

Field	Value	IRS element (for citing)
Total	$163,317	TotalAmt
Program Services	$7,917	ProgramServicesAmt
Management And General	$155,400	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Payments To Affiliates PaymentsToAffiliatesGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt
Program Services	$0	ProgramServicesAmt
Management And General	$0	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Depreciation Depletion DepreciationDepletionGrp

Field	Value	IRS element (for citing)
Total	$4,732,569	TotalAmt
Program Services	$3,980,205	ProgramServicesAmt
Management And General	$614,050	ManagementAndGeneralAmt
Fundraising	$138,314	FundraisingAmt

Insurance InsuranceGrp

Field	Value	IRS element (for citing)
Total	$866,442	TotalAmt
Program Services	$0	ProgramServicesAmt
Management And General	$866,442	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Other Expenses OtherExpensesGrp (2 entries)

DescDesc	TotalTotalAmt	Program ServicesProgramServicesAmt	Management And GeneralManagementAndGeneralAmt	FundraisingFundraisingAmt
Concert production expense	$3,642,264	$3,408,739	$58,054	$175,471
Credit card fees	$1,524,795	$1,387,993	$5	$136,797

All Other Expenses AllOtherExpensesGrp

Field	Value	IRS element (for citing)
Total	$2,379,462	TotalAmt
Program Services	$1,053,558	ProgramServicesAmt
Management And General	$1,261,196	ManagementAndGeneralAmt
Fundraising	$64,708	FundraisingAmt

Total Functional Expenses TotalFunctionalExpensesGrp

Field	Value	IRS element (for citing)
Total	$127,925,000	TotalAmt
Program Services	$104,670,879	ProgramServicesAmt
Management And General	$15,092,109	ManagementAndGeneralAmt
Fundraising	$8,162,012	FundraisingAmt

Cash Non Interest Bearing CashNonInterestBearingGrp

Field	Value	IRS element (for citing)
BOY	$39,043,116	BOYAmt
EOY	$39,205,329	EOYAmt

Savings And Temp Cash Invst SavingsAndTempCashInvstGrp

Field	Value	IRS element (for citing)
BOY	$12,049,739	BOYAmt
EOY	$2,203,085	EOYAmt

Pledges And Grants Receivable PledgesAndGrantsReceivableGrp

Field	Value	IRS element (for citing)
BOY	$8,772,685	BOYAmt
EOY	$7,879,039	EOYAmt

Accounts Receivable AccountsReceivableGrp

Field	Value	IRS element (for citing)
BOY	$5,800,673	BOYAmt
EOY	$7,495,325	EOYAmt

Inventories For Sale Or Use InventoriesForSaleOrUseGrp

Field	Value	IRS element (for citing)
BOY	$847,721	BOYAmt
EOY	$676,639	EOYAmt

Prepaid Expenses Defrd Charges PrepaidExpensesDefrdChargesGrp

Field	Value	IRS element (for citing)
BOY	$3,302,735	BOYAmt
EOY	$3,167,423	EOYAmt

Field	Value	IRS element (for citing)
Land Bldg Equip Cost Or Other Bss	$195,592,255	LandBldgEquipCostOrOtherBssAmt
Land Bldg Equip Accum Deprec	$130,291,941	LandBldgEquipAccumDeprecAmt

Land Bldg Equip Basis Net LandBldgEquipBasisNetGrp

Field	Value	IRS element (for citing)
BOY	$65,074,296	BOYAmt
EOY	$65,300,314	EOYAmt

Investments Pub Traded Sec InvestmentsPubTradedSecGrp

Field	Value	IRS element (for citing)
BOY	$59,837,406	BOYAmt
EOY	$70,945,003	EOYAmt

Investments Other Securities InvestmentsOtherSecuritiesGrp

Field	Value	IRS element (for citing)
BOY	$442,204,458	BOYAmt
EOY	$496,577,184	EOYAmt

Intangible Assets IntangibleAssetsGrp

Field	Value	IRS element (for citing)
EOY	$0	EOYAmt

Other Assets Total OtherAssetsTotalGrp

Field	Value	IRS element (for citing)
BOY	$43,377,645	BOYAmt
EOY	$44,286,446	EOYAmt

Total Assets TotalAssetsGrp

Field	Value	IRS element (for citing)
BOY	$680,310,474	BOYAmt
EOY	$737,735,787	EOYAmt

Accounts Payable Accr Expnss AccountsPayableAccrExpnssGrp

Field	Value	IRS element (for citing)
BOY	$13,262,422	BOYAmt
EOY	$11,164,069	EOYAmt

Grants Payable GrantsPayableGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$0	EOYAmt

Deferred Revenue DeferredRevenueGrp

Field	Value	IRS element (for citing)
BOY	$9,270,770	BOYAmt
EOY	$9,566,265	EOYAmt

Tax Exempt Bond Liabilities TaxExemptBondLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$0	EOYAmt

Escrow Account Liability EscrowAccountLiabilityGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$0	EOYAmt

Loans From Officers Directors LoansFromOfficersDirectorsGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$0	EOYAmt

Mortg Notes Pybl Scrd Invst Prop MortgNotesPyblScrdInvstPropGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$0	EOYAmt

Unsecured Notes Loans Payable UnsecuredNotesLoansPayableGrp

Field	Value	IRS element (for citing)
BOY	$10,000,000	BOYAmt
EOY	$0	EOYAmt

Other Liabilities OtherLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$29,398,794	BOYAmt
EOY	$15,207,375	EOYAmt

Total Liabilities TotalLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$61,931,986	BOYAmt
EOY	$35,937,709	EOYAmt

Field	Value	IRS element (for citing)
Organization Follows FASB117	Yes (X)	OrganizationFollowsFASB117Ind

No Donor Restriction Net Assets NoDonorRestrictionNetAssetsGrp

Field	Value	IRS element (for citing)
BOY	$109,089,206	BOYAmt
EOY	$127,734,405	EOYAmt

Donor Restriction Net Assets DonorRestrictionNetAssetsGrp

Field	Value	IRS element (for citing)
BOY	$509,289,282	BOYAmt
EOY	$574,063,673	EOYAmt

Total Net Assets Fund Balance TotalNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$618,378,488	BOYAmt
EOY	$701,798,078	EOYAmt

Tot Liab Net Assets Fund Balance TotLiabNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$680,310,474	BOYAmt
EOY	$737,735,787	EOYAmt

Field	Value	IRS element (for citing)
Info In Schedule O Part XI	Yes (X)	InfoInScheduleOPartXIInd
Reconcilation Revenue Expnss	$27,497,276	ReconcilationRevenueExpnssAmt
Net Unrlzd Gains Losses Invst	$43,456,744	NetUnrlzdGainsLossesInvstAmt
Donated Services And Use Fclts	$0	DonatedServicesAndUseFcltsAmt
Investment Expense	$0	InvestmentExpenseAmt
Prior Period Adjustments	$0	PriorPeriodAdjustmentsAmt
Other Changes In Net Assets	$12,465,570	OtherChangesInNetAssetsAmt
Method Of Accounting Accrual	Yes (X)	MethodOfAccountingAccrualInd
Accountant Compile Or Review	0	AccountantCompileOrReviewInd
FS Audited	Yes (1)	FSAuditedInd

FS Audited Basis FSAuditedBasisGrp

Field	Value	IRS element (for citing)
Consolidated Basis Fincl Stmt	Yes (X)	ConsolidatedBasisFinclStmtInd

Field	Value	IRS element (for citing)
Audit Committee	Yes (1)	AuditCommitteeInd
Federal Grant Audit Required	0	FederalGrantAuditRequiredInd

Schedule A IRS990ScheduleA

Field	Value	IRS element (for citing)
Public Organization170	Yes (X)	PublicOrganization170Ind

Gifts Grants Contri Rcvd170 GiftsGrantsContriRcvd170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$39,371,221	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$49,379,236	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$35,595,865	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$37,094,136	CurrentTaxYearMinus1YearAmt
Current Tax Year	$59,254,623	CurrentTaxYearAmt
Total	$220,695,081	TotalAmt

Tax Rev Levied Orgnztnl Bnft170 TaxRevLeviedOrgnztnlBnft170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$0	CurrentTaxYearMinus4YearsAmt
Total	$0	TotalAmt

Govt Furn Srvc Fclts Vl170 GovtFurnSrvcFcltsVl170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$0	CurrentTaxYearMinus4YearsAmt
Total	$0	TotalAmt

Total Calendar Year170 TotalCalendarYear170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$39,371,221	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$49,379,236	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$35,595,865	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$37,094,136	CurrentTaxYearMinus1YearAmt
Current Tax Year	$59,254,623	CurrentTaxYearAmt
Total	$220,695,081	TotalAmt

Field	Value	IRS element (for citing)
Substantial Contributors Tot	$30,946,537	SubstantialContributorsTotAmt
Public Support Total170	$189,748,544	PublicSupportTotal170Amt

Gross Investment Income170 GrossInvestmentIncome170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$5,900,450	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$4,363,193	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$6,581,912	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$8,613,779	CurrentTaxYearMinus1YearAmt
Current Tax Year	$7,644,484	CurrentTaxYearAmt
Total	$33,103,818	TotalAmt

Unrelated Business Net Incm170 UnrelatedBusinessNetIncm170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$45,406	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$914,751	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$70,953	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$773,636	CurrentTaxYearMinus1YearAmt
Current Tax Year	$2,409,083	CurrentTaxYearAmt
Total	$4,213,829	TotalAmt

Other Income170 OtherIncome170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$0	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$0	CurrentTaxYearMinus3YearsAmt
Total	$0	TotalAmt

Field	Value	IRS element (for citing)
Total Support	$258,012,728	TotalSupportAmt
Gross Receipts Rltd Activities	$61,085,324	GrossReceiptsRltdActivitiesAmt
Public Support CY170	0.73542	PublicSupportCY170Pct
Public Support PY170	0.78518	PublicSupportPY170Pct
Thirty Thr Pct Suprt Tests CY170	Yes (X)	ThirtyThrPctSuprtTestsCY170Ind

Schedule B IRS990ScheduleB

Contributor Information ContributorInformationGrp

Field	Value	IRS element (for citing)
Contributor	RESTRICTED	ContributorNum

Contributor Business Name ContributorBusinessName

Field	Value	IRS element (for citing)
Business Name Line1	RESTRICTED	BusinessNameLine1

Contributor US Address ContributorUSAddress

Field	Value	IRS element (for citing)
Address Line1	RESTRICTED	AddressLine1
Address Line2	RESTRICTED	AddressLine2
City	RESTRICTED	City
State	RESTRICTED	State
ZIP Code	RESTRICTED	ZIPCode

Field	Value	IRS element (for citing)
Total Contributions	RESTRICTED	TotalContributionsAmt

Schedule C IRS990ScheduleC

Field	Value	IRS element (for citing)
Volunteers	0	VolunteersInd
Paid Staff Or Management	Yes (1)	PaidStaffOrManagementInd
Media Advertisements	0	MediaAdvertisementsInd
Mailings Members	0	MailingsMembersInd
Publications Or Broadcast	0	PublicationsOrBroadcastInd
Grants Other Organizations	0	GrantsOtherOrganizationsInd
Direct Contact Legislators	Yes (1)	DirectContactLegislatorsInd
Direct Contact Legislators	$99,641	DirectContactLegislatorsAmt
Rallies Demonstrations	0	RalliesDemonstrationsInd
Other Activities	0	OtherActivitiesInd
Total Lobbying Expenditures	$99,641	TotalLobbyingExpendituresAmt
Not Described Section501c3	0	NotDescribedSection501c3Ind

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	Schedule C, Part II-B, Line 1	FormAndLineReferenceDesc
Explanation	The BSO's lobbying activities addressed issues such as state funding and proposed legislation related to historical preservation, tourism, transportation, infrastructure and education in the context of arts and nonprofit organizations. A small allocation of the salary of one employee and a service contract to engage in lobbying activities on the issues noted above are included in the amount reported.	ExplanationTxt

Schedule D IRS990ScheduleD

CY Endwmt Fund CYEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$536,151,000	BeginningYearBalanceAmt
Contributions	$14,492,000	ContributionsAmt
Investment Earnings Or Losses	$79,782,000	InvestmentEarningsOrLossesAmt
Grants Or Scholarships	$0	GrantsOrScholarshipsAmt
Other Expenditures	$27,467,000	OtherExpendituresAmt
Administrative Expenses	$0	AdministrativeExpensesAmt
End Year Balance	$602,958,000	EndYearBalanceAmt

CY Minus1 Yr Endwmt Fund CYMinus1YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$495,009,000	BeginningYearBalanceAmt
Contributions	$8,716,000	ContributionsAmt
Investment Earnings Or Losses	$59,333,000	InvestmentEarningsOrLossesAmt
Grants Or Scholarships	$0	GrantsOrScholarshipsAmt
Other Expenditures	$26,907,000	OtherExpendituresAmt
Administrative Expenses	$0	AdministrativeExpensesAmt
End Year Balance	$536,151,000	EndYearBalanceAmt

CY Minus2 Yr Endwmt Fund CYMinus2YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$484,000,000	BeginningYearBalanceAmt
Contributions	$11,645,000	ContributionsAmt
Investment Earnings Or Losses	$26,301,000	InvestmentEarningsOrLossesAmt
Grants Or Scholarships	$0	GrantsOrScholarshipsAmt
Other Expenditures	$26,937,000	OtherExpendituresAmt
Administrative Expenses	$0	AdministrativeExpensesAmt
End Year Balance	$495,009,000	EndYearBalanceAmt

CY Minus3 Yr Endwmt Fund CYMinus3YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$576,304,000	BeginningYearBalanceAmt
Contributions	$6,070,000	ContributionsAmt
Investment Earnings Or Losses	-$73,556,000	InvestmentEarningsOrLossesAmt
Grants Or Scholarships	$0	GrantsOrScholarshipsAmt
Other Expenditures	$24,818,000	OtherExpendituresAmt
Administrative Expenses	$0	AdministrativeExpensesAmt
End Year Balance	$484,000,000	EndYearBalanceAmt

CY Minus4 Yr Endwmt Fund CYMinus4YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$478,096,000	BeginningYearBalanceAmt
Contributions	$6,858,000	ContributionsAmt
Investment Earnings Or Losses	$116,358,000	InvestmentEarningsOrLossesAmt
Grants Or Scholarships	$0	GrantsOrScholarshipsAmt
Other Expenditures	$25,008,000	OtherExpendituresAmt
Administrative Expenses	$0	AdministrativeExpensesAmt
End Year Balance	$576,304,000	EndYearBalanceAmt

Field	Value	IRS element (for citing)
Board Designated Balance EOY	0.11	BoardDesignatedBalanceEOYPct
Prmnnt Endowment Balance EOY	0.44	PrmnntEndowmentBalanceEOYPct
Term Endowment Balance EOY	0.45	TermEndowmentBalanceEOYPct
Endowments Held Unrelated Org	Yes (1)	EndowmentsHeldUnrelatedOrgInd
Endowments Held Related Org	Yes (1)	EndowmentsHeldRelatedOrgInd
Related Org List Sch R	Yes (1)	RelatedOrgListSchRInd

Land LandGrp

Field	Value	IRS element (for citing)
Investment Cost Or Other Basis	$0	InvestmentCostOrOtherBasisAmt
Other Cost Or Other Basis	$18,105,585	OtherCostOrOtherBasisAmt
Book Value	$18,105,585	BookValueAmt

Buildings BuildingsGrp

Field	Value	IRS element (for citing)
Investment Cost Or Other Basis	$0	InvestmentCostOrOtherBasisAmt
Other Cost Or Other Basis	$128,708,312	OtherCostOrOtherBasisAmt
Depreciation	$91,962,289	DepreciationAmt
Book Value	$36,746,023	BookValueAmt

Leasehold Improvements LeaseholdImprovementsGrp

Field	Value	IRS element (for citing)
Investment Cost Or Other Basis	$0	InvestmentCostOrOtherBasisAmt
Other Cost Or Other Basis	$0	OtherCostOrOtherBasisAmt
Depreciation	$0	DepreciationAmt
Book Value	$0	BookValueAmt

Equipment EquipmentGrp

Field	Value	IRS element (for citing)
Investment Cost Or Other Basis	$0	InvestmentCostOrOtherBasisAmt
Other Cost Or Other Basis	$48,778,358	OtherCostOrOtherBasisAmt
Depreciation	$38,329,652	DepreciationAmt
Book Value	$10,448,706	BookValueAmt

Other Land Buildings OtherLandBuildingsGrp

Field	Value	IRS element (for citing)
Investment Cost Or Other Basis	$0	InvestmentCostOrOtherBasisAmt
Other Cost Or Other Basis	$0	OtherCostOrOtherBasisAmt
Depreciation	$0	DepreciationAmt
Book Value	$0	BookValueAmt

Field	Value	IRS element (for citing)
Total Book Value Land Buildings	$65,300,314	TotalBookValueLandBuildingsAmt

Financial Derivatives FinancialDerivativesGrp

Field	Value	IRS element (for citing)
Book Value	$0	BookValueAmt

Closely Held Equity Interests CloselyHeldEquityInterestsGrp

Field	Value	IRS element (for citing)
Book Value	$0	BookValueAmt

Other Securities OtherSecuritiesGrp (5 entries)

DescDesc	Book ValueBookValueAmt	Method ValuationMethodValuationCd
Marketable alternatives	$353,734,070	F
Illiquid equities	$120,040,367	F
Real estate	$6,588,629	F
Real assets	$7,691,610	F
Investment in 263 Realty Corp & HALP	$8,522,508	F

Field	Value	IRS element (for citing)
Total Book Value Securities	$496,577,184	TotalBookValueSecuritiesAmt

Other Assets Org OtherAssetsOrgGrp (2 entries)

DescDesc	Book ValueBookValueAmt
Assets held by others	$35,435,295
Assets of split-interest agreements	$8,851,151

Field	Value	IRS element (for citing)
Total Book Value Other Assets	$44,286,446	TotalBookValueOtherAssetsAmt
Federal Income Tax Liability	$0	FederalIncomeTaxLiabilityAmt

Other Liabilities Org OtherLiabilitiesOrgGrp

Field	Value	IRS element (for citing)
Desc	Accrued liability for pension & post-retirement	Desc
Amt	$15,207,375	Amt

Field	Value	IRS element (for citing)
Total Liability	$15,207,375	TotalLiabilityAmt
Footnote Text	Yes (X)	FootnoteTextInd
Total Rev Etc Audited Fincl Stmt	$200,296,960	TotalRevEtcAuditedFinclStmtAmt
Net Unrealized Gains Invst	$43,456,744	NetUnrealizedGainsInvstAmt
Donated Services And Use Fclts	$536,523	DonatedServicesAndUseFcltsAmt
Recoveries Prior Year Grants	$0	RecoveriesPriorYearGrantsAmt
Other Revenue	$634,863	OtherRevenueAmt
Revenue Not Reported	$44,628,130	RevenueNotReportedAmt
Revenue Subtotal	$155,668,830	RevenueSubtotalAmt
Investment Expenses Not Incld	$1,724,539	InvestmentExpensesNotIncldAmt
Other Revenues Not Included	-$1,971,093	OtherRevenuesNotIncludedAmt
Revenue Not Reported Fincl Stmt	-$246,554	RevenueNotReportedFinclStmtAmt
Total Revenue Per Form990	$155,422,276	TotalRevenuePerForm990Amt
Tot Expns Etc Audited Fincl Stmt	$128,708,077	TotExpnsEtcAuditedFinclStmtAmt
Donated Services Use Fclts	$536,523	DonatedServicesUseFcltsAmt
Prior Year Adjustments	$0	PriorYearAdjustmentsAmt
Losses Reported	$0	LossesReportedAmt
Other Expenses Included	$1,971,093	OtherExpensesIncludedAmt
Expenses Not Reported	$2,507,616	ExpensesNotReportedAmt
Expenses Subtotal	$126,200,461	ExpensesSubtotalAmt
Investment Expenses Not Incld2	$1,724,539	InvestmentExpensesNotIncld2Amt
Other Expenses Not Included	$0	OtherExpensesNotIncludedAmt
Expenses Not Rpt Fincl Stmt	$1,724,539	ExpensesNotRptFinclStmtAmt
Total Expenses Per Form990	$127,925,000	TotalExpensesPerForm990Amt

Supplemental Information Detail SupplementalInformationDetail (6 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Schedule D, Part V, Line 4	The purpose of the endowment is to provide enduring support for the mission of the Orchestra by releasing a substantial and reliable flow of funds to the operating budget. The income earned on the Orchestra's endowment assets may be used for general or donor-restricted purposes and is recorded as net assets without donor restriction or net assets with donor restriction, as appropriate.
Schedule D, Part VII, Line 3	The investment in 263 HA Limited Partnership is valued at net cost plus accumulated earnings reduced by the distribution to the BSO.
Schedule D, Part X, Line 2	The Orchestra accounts for the effect of any uncertain tax positions based on a "more likely than not" threshold for the recognition of the tax positions being sustained based on the technical merits of the position under scrutiny by the applicable taxing authority. If a tax position or positions are deemed to result in uncertainties of those positions, the unrecognized tax benefit is estimated based on a "cumulative probability assessment" that aggregates the estimated tax liability for all uncertain tax positions. The Orchestra has identified its tax status as a tax exempt entity and its determinations relative to income that is considered related and unrelated as its only significant tax positions, however, the Orchestra has determined that such tax positions do not result in an uncertainty requiring recognition. The Orchestra is not currently under examination by any taxing jurisdiction. Its federal and state income tax returns are generally open for examination for three years following the date filed.
Schedule D, Part XI, Line 2d	Change in value of split interest agreements
Schedule D, Part XI, Line 4b	$748,316 represents cost of good sold and $1,222,777 represents direct fundraising event expenses
Schedule D, Part XII, Line 2d	$748,316 represents cost of good sold and $1,222,777 represents direct fundraising event expenses

Schedule F IRS990ScheduleF

Account Activities Outside US AccountActivitiesOutsideUSGrp (3 entries)

RegionRegionTxt	Type Of Activities ConductedTypeOfActivitiesConductedTxt	Region Total ExpendituresRegionTotalExpendituresAmt	Specific Services ProvidedSpecificServicesProvidedTxt
Central America and the Caribbean	Investments	$200,973,921
Europe (including Iceland and Greenland)	Investments	$18,645,491
Europe (including Iceland and Greenland)	Program Services	$2,367,990	European tour

Field	Value	IRS element (for citing)
Total Office	0	TotalOfficeCnt
Total Employee	0	TotalEmployeeCnt
Total Spent	$221,987,402	TotalSpentAmt
Transfer To Foreign Corp	Yes (1)	TransferToForeignCorpInd
Interest In Foreign Trust	0	InterestInForeignTrustInd
Foreign Corp Ownership	Yes (1)	ForeignCorpOwnershipInd
Passive Foreign Investmest Co	Yes (1)	PassiveForeignInvestmestCoInd
Foreign Partnership	Yes (1)	ForeignPartnershipInd
Boycott Countries	0	BoycottCountriesInd

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	Schedule F, Part I, Line 3	FormAndLineReferenceDesc
Explanation	Investment activities are listed at book value. Program activities represent expenditures for the 4 city European Tour in May 2025.	ExplanationTxt

Schedule G IRS990ScheduleG

Field	Value	IRS element (for citing)
Mail Solicitations	Yes (X)	MailSolicitationsInd
Email Solicitations	Yes (X)	EmailSolicitationsInd
Phone Solicitations	Yes (X)	PhoneSolicitationsInd
In Person Solicitations	Yes (X)	InPersonSolicitationsInd
Solicitation Of Non Govt Grants	Yes (X)	SolicitationOfNonGovtGrantsInd
Solicitation Of Govt Grants	Yes (X)	SolicitationOfGovtGrantsInd
Special Fundraising Events	Yes (X)	SpecialFundraisingEventsInd
Agrmt Prof Fundraising Acty	Yes (1)	AgrmtProfFundraisingActyInd

Fundraiser Activity Info FundraiserActivityInfoGrp (2 entries)

Address Line1USAddress/AddressLine1Txt	CityUSAddress/CityNm	State AbbreviationUSAddress/StateAbbreviationCd	ZIPUSAddress/ZIPCd	ActivityActivityTxt	Fundraiser Control Of FundsFundraiserControlOfFundsInd	Gross ReceiptsGrossReceiptsAmt	Retained By ContractorRetainedByContractorAmt	Net To OrganizationNetToOrganizationAmt	Address Line2USAddress/AddressLine2Txt
Allegiance Fundraising LLC
3064 49th St S	Fargo	ND	58104	Direct mail campaigns	0	$2,894,424	$157,601	$2,736,823
DCM Inc
244 Fifth Avenue	New York	NY	10001	Telefundraising	0	$367,941	$219,444	$148,497	Suite M223

Field	Value	IRS element (for citing)
Total Gross Receipts	$3,262,365	TotalGrossReceiptsAmt
Total Retained By Contractors	$377,045	TotalRetainedByContractorsAmt
Total Net To Organization	$2,885,320	TotalNetToOrganizationAmt
Licensed States	AK	LicensedStatesCd
Licensed States	AL	LicensedStatesCd
Licensed States	AR	LicensedStatesCd
Licensed States	CA	LicensedStatesCd
Licensed States	CO	LicensedStatesCd
Licensed States	CT	LicensedStatesCd
Licensed States	FL	LicensedStatesCd
Licensed States	GA	LicensedStatesCd
Licensed States	HI	LicensedStatesCd
Licensed States	IL	LicensedStatesCd
Licensed States	KS	LicensedStatesCd
Licensed States	MA	LicensedStatesCd
Licensed States	MD	LicensedStatesCd
Licensed States	ME	LicensedStatesCd
Licensed States	MN	LicensedStatesCd
Licensed States	MO	LicensedStatesCd
Licensed States	MS	LicensedStatesCd
Licensed States	NH	LicensedStatesCd
Licensed States	NJ	LicensedStatesCd
Licensed States	NM	LicensedStatesCd
Licensed States	NV	LicensedStatesCd
Licensed States	NY	LicensedStatesCd
Licensed States	OH	LicensedStatesCd
Licensed States	OK	LicensedStatesCd
Licensed States	OR	LicensedStatesCd
Licensed States	PA	LicensedStatesCd
Licensed States	RI	LicensedStatesCd
Licensed States	SC	LicensedStatesCd
Licensed States	TN	LicensedStatesCd
Licensed States	UT	LicensedStatesCd
Licensed States	VA	LicensedStatesCd
Licensed States	WA	LicensedStatesCd
Licensed States	WI	LicensedStatesCd
Licensed States	WV	LicensedStatesCd

Fundraising Event Information FundraisingEventInformationGrp

Field	Value	IRS element (for citing)
Event1	Opening Night at Symphony Gala	Event1Nm
Gross Receipts Event1	$2,190,256	GrossReceiptsEvent1Amt
Charitable Contri Event1	$2,017,956	CharitableContriEvent1Amt
Gross Revenue Event1	$172,300	GrossRevenueEvent1Amt
Cash Prizes Event1	$0	CashPrizesEvent1Amt
Non Cash Prizes Event1	$0	NonCashPrizesEvent1Amt
Rent Facility Costs Event1	$0	RentFacilityCostsEvent1Amt
Food And Beverage Event1	$161,226	FoodAndBeverageEvent1Amt
Entertainment Event1	$149,223	EntertainmentEvent1Amt
Other Direct Expenses Event1	$282,224	OtherDirectExpensesEvent1Amt
Event2	Summer Celebration at Tanglewood	Event2Nm
Gross Receipts Event2	$1,269,033	GrossReceiptsEvent2Amt
Charitable Contri Event2	$1,014,659	CharitableContriEvent2Amt
Gross Revenue Event2	$254,374	GrossRevenueEvent2Amt
Cash Prizes Event2	$0	CashPrizesEvent2Amt
Non Cash Prizes Event2	$0	NonCashPrizesEvent2Amt
Rent Facility Costs Event2	$0	RentFacilityCostsEvent2Amt
Food And Beverage Event2	$117,492	FoodAndBeverageEvent2Amt
Entertainment Event2	$51,300	EntertainmentEvent2Amt
Other Direct Expenses Event2	$130,000	OtherDirectExpensesEvent2Amt
Other Events Total	2	OtherEventsTotalCnt
Gross Receipts Other Events	$808,251	GrossReceiptsOtherEventsAmt
Charitable Contri Other Events	$654,016	CharitableContriOtherEventsAmt
Gross Revenue Other Events	$154,235	GrossRevenueOtherEventsAmt
Cash Prizes Other Events	$0	CashPrizesOtherEventsAmt
Non Cash Prizes Other Events	$0	NonCashPrizesOtherEventsAmt
Rent Fclty Costs Other Events	$0	RentFcltyCostsOtherEventsAmt
Food And Beverage Other Events	$144,553	FoodAndBeverageOtherEventsAmt
Entertainment Other Events	$91,299	EntertainmentOtherEventsAmt
Oth Direct Expnss Other Events	$95,460	OthDirectExpnssOtherEventsAmt
Gross Receipts Total	$4,267,540	GrossReceiptsTotalAmt
Charitable Contributions Tot	$3,686,631	CharitableContributionsTotAmt
Gross Revenue Total Events	$580,909	GrossRevenueTotalEventsAmt
Cash Prizes Total Events	$0	CashPrizesTotalEventsAmt
Non Cash Prizes Total Events	$0	NonCashPrizesTotalEventsAmt
Rent Fclty Costs Total Events	$0	RentFcltyCostsTotalEventsAmt
Food And Beverage Total Events	$423,271	FoodAndBeverageTotalEventsAmt
Entertainment Total Events	$291,822	EntertainmentTotalEventsAmt
Oth Direct Expnss Total Events	$507,684	OthDirectExpnssTotalEventsAmt
Direct Expense Summary Events	$1,222,777	DirectExpenseSummaryEventsAmt
Net Income Summary	-$641,868	NetIncomeSummaryAmt

Schedule J IRS990ScheduleJ

Field	Value	IRS element (for citing)
First Class Or Charter Travel	Yes (X)	FirstClassOrCharterTravelInd
Housing Allowance Or Residence	Yes (X)	HousingAllowanceOrResidenceInd
Written Policy Ref T And E Expnss	Yes (1)	WrittenPolicyRefTAndEExpnssInd
Substantiation Required	Yes (1)	SubstantiationRequiredInd
Compensation Committee	Yes (X)	CompensationCommitteeInd
Independent Consultant	Yes (X)	IndependentConsultantInd
Form990 Of Other Organizations	Yes (X)	Form990OfOtherOrganizationsInd
Written Employment Contract	Yes (X)	WrittenEmploymentContractInd
Compensation Survey	Yes (X)	CompensationSurveyInd
Board Or Committee Approval	Yes (X)	BoardOrCommitteeApprovalInd
Severance Payment	Yes (1)	SeverancePaymentInd
Supplemental Nonqual Rtr Plan	0	SupplementalNonqualRtrPlanInd
Equity Based Comp Arrngm	0	EquityBasedCompArrngmInd
Comp Based On Revenue Of Flng Org	0	CompBasedOnRevenueOfFlngOrgInd
Comp Bsd On Rev Related Orgs	0	CompBsdOnRevRelatedOrgsInd
Comp Bsd Net Earns Flng Org	0	CompBsdNetEarnsFlngOrgInd
Comp Bsd Net Earns Rltd Orgs	0	CompBsdNetEarnsRltdOrgsInd
Any Non Fixed Payments	Yes (1)	AnyNonFixedPaymentsInd
Initial Contract Exception	Yes (1)	InitialContractExceptionInd
Rebuttable Presumption Proc	Yes (1)	RebuttablePresumptionProcInd

Rltd Org Officer Trst Key Empl RltdOrgOfficerTrstKeyEmplGrp (9 entries)

TitleTitleTxt	Base Compensation Filing OrgBaseCompensationFilingOrgAmt	Compensation Based On Rltd OrgsCompensationBasedOnRltdOrgsAmt	Bonus Filing OrganizationBonusFilingOrganizationAmount	Bonus Related OrganizationsBonusRelatedOrganizationsAmt	Other Compensation Filing OrgOtherCompensationFilingOrgAmt	Other Compensation Rltd OrgsOtherCompensationRltdOrgsAmt	Deferred Compensation Flng OrgDeferredCompensationFlngOrgAmt	Deferred Comp Rltd OrgsDeferredCompRltdOrgsAmt	Nontaxable Benefits Filing OrgNontaxableBenefitsFilingOrgAmt	Nontaxable Benefits Rltd OrgsNontaxableBenefitsRltdOrgsAmt	Total Compensation Filing OrgTotalCompensationFilingOrgAmt	Total Compensation Rltd OrgsTotalCompensationRltdOrgsAmt	Comp Report Prior990 Filing OrgCompReportPrior990FilingOrgAmt	Comp Report Prior990 Rltd OrgsCompReportPrior990RltdOrgsAmt
Chad Smith
President & Chief Executive Officer	$1,097,476	$0	$210,000	$0	$10,623	$0	$2,588	$0	$50,667	$0	$1,371,354	$0	$0	$0
Maureen Flores
Chief Development Officer	$194,756	$0	$75,000	$0	$248,758	$0	$5,525	$0	$14,619	$0	$538,658	$0	$0	$0
Paul Eric Krauss
Chief Financial Officer, thru July 2025	$311,547	$0	$0	$0	$3,009	$0	$9,517	$0	$38,735	$0	$362,808	$0	$0	$0
Katherine Decelles
Controller	$217,805	$0	$0	$0	$1,067	$0	$6,371	$0	$12,947	$0	$238,190	$0	$0	$0
Alexander Velinzon
Associate Concertmaster	$447,478	$0	$19,800	$0	$0	$0	$0	$0	$50,954	$0	$518,232	$0	$0	$0
Timothy Genis
Timpani	$419,187	$0	$0	$0	$0	$0	$0	$0	$0	$0	$419,187	$0	$0	$0
Tamara Smirnova
First Violin	$192,535	$0	$0	$0	$401,680	$0	$0	$0	$13,009	$0	$607,224	$0	$0	$0
John A Ferrillo Jr
Principal Oboe	$377,859	$0	$0	$0	$0	$0	$0	$0	$34,444	$0	$412,303	$0	$0	$0
Thomas Rolfs Jr
Principal Trumpet	$372,495	$0	$0	$0	$0	$0	$0	$0	$32,314	$0	$404,809	$0	$0	$0

Supplemental Information Detail SupplementalInformationDetail (4 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Schedule J, Part I, Line 1a	In connection with the business needs of the Boston Symphony Orchestra, Inc. (the Orchestra) charter travel is used when transporting large number of personnel in connection with the Orchestra's touring. As a general rule, the BSO does not provide first class travel for employees. Housing for the President and CEO is provided during the summer for the convenience of the BSO in connection with the Orchestra's activities away from Boston at Tanglewood and is not considered taxable. The housing benefit of $28,000 is included in Schedule J, Part II, column D.
Schedule J, Part I, Line 4	Tamara Smirnova received $398,710 and Maureen Flores received $218,400 in severance in calendar year 2024.
Schedule J, Part I, Line 7	The amounts reported for the President and CEO on Schedule J, Part II, column B(ii) are fixed payments. Amounts reported for other individuals on Schedule J, Part II, column B(ii) include non-fixed payments representing performance based compensation.
Schedule J, Part I, Line 8	Compensation reported in Part VII, Section A paid to President and CEO Chad Smith was subject to the initial contract exception described in Regulations section 53.4958-4(a)(3). Nonetheless, the Orchestra followed the rebuttable presumption procedures described in Regulations section 53.4958(c).

Schedule M IRS990ScheduleM

Securities Publicly Traded SecuritiesPubliclyTradedGrp

Field	Value	IRS element (for citing)
Non Cash Checkbox	Yes (X)	NonCashCheckboxInd
Contribution	100	ContributionCnt
Noncash Contributions Rpt F990	$13,539,313	NoncashContributionsRptF990Amt
Method Of Determining Revenues	Fair market value	MethodOfDeterminingRevenuesTxt

Securities Closely Held Stock SecuritiesCloselyHeldStockGrp

Field	Value	IRS element (for citing)
Non Cash Checkbox	Yes (X)	NonCashCheckboxInd
Contribution	1	ContributionCnt
Noncash Contributions Rpt F990	$150,015	NoncashContributionsRptF990Amt
Method Of Determining Revenues	Fair market value	MethodOfDeterminingRevenuesTxt

Field	Value	IRS element (for citing)
Form8283 Received	1	Form8283ReceivedCnt
Any Property That Must Be Held	0	AnyPropertyThatMustBeHeldInd
Review Process Unusual NC Gifts	Yes (1)	ReviewProcessUnusualNCGiftsInd
Third Parties Used	0	ThirdPartiesUsedInd

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	Schedule M, Part I, Line 9	FormAndLineReferenceDesc
Explanation	Column B responses represent the number of contributions.	ExplanationTxt

Schedule O IRS990ScheduleO

Supplemental Information Detail SupplementalInformationDetail (9 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Form 990, Part I, Line 6	Volunteers comprise 735 members of the Boston Symphony Association of Volunteers (BSAV) who provide a variety of services both at Symphony Hall and Tanglewood, 193 members of the Tanglewood Festival Chorus, 43 voting trustees and 209 non-voting members of the governing board.
Form 990, Part VI, Section B, Line 11b	The Form 990 is prepared by BSO management and reviewed by a paid preparer. The complete 990 is then reviewed by the Audit, Risk and Compliance Committee of the Board of Trustees. The Audit, Risk and Compliance Committee reviews each section and schedule of the 990, focusing on key changes and substantive disclosures. Subsequent to this review, a copy of the final draft 990, which is the version to be filed with the IRS, is placed in a password-protected website for all members of the Board of Trustees to review in advance of their next board meeting. All members of the Board of Trustees receive an email notifying them that the Form 990 is available for review on the site. The final 990 is signed by the Chief Financial Officer or President and CEO and paid preparer.
Form 990, Part VI, Section B, Line 12c	The Boston Symphony Orchestra has a Conflict of Interest Policy. The policy requires that Trustees, Officers and members of a committee with board-delegated powers disclose the existence of any potential or actual conflicts of interest to the Board or to the Executive Committee. The Board or Executive Committee then discusses and votes to determine whether an actual conflict of interest exists. If a conflict exists, the Board or Executive Committee evaluates the particular transaction or arrangement to determine the most reasonable course of action. The individual who disclosed the conflict must leave the Board or Executive Committee meeting during the discussion of, and vote on, the transaction or arrangement that results in the conflict of interest. Additionally, the policy also requires any staff member that has information about a possible conflict, to report the matter, promptly, to their supervisor, the Chief Human Resources Officer or Chief Financial Officer. The Director of Human Resources and the Chief Financial Officer will review the circumstances of the possible conflict with other appropriate management to make the determination about the most reasonable course of action. A breach of the conflict of interest policy is grounds for disciplinary action, up to and including termination. Additionally, on an annual basis, all Trustees, Officers, or members of a committee with board delegated powers are provided with a copy of the policy and must sign a statement affirming that they have received, read and understand the policy; they must also affirm that they agree to comply with the policy. As part of this Annual Notice of Policy, each individual is required to disclose any potential or actual conflicts of interest in writing. All responses indicating a potential or actual conflict are subject to review by the Board or Executive Committee as described above.
Form 990, Part VI, Section B, Line 15	The BSO has a designated Compensation Committee, comprised of trustees of the BSO, which sets the process for determining and approving compensation for officers and key employees. The compensation Committee's process includes: (a) development and consideration of comparability data to provide the bases for the Committee's decisions and (b) consideration of (i) applicable accounting and disclosure rules, (ii) emerging trends in corporate governance, and (iii) standards and guidelines promulgated by the Division of Public Charities of the Massachusetts Office of the Attorney General (collectively, the "Compensation Process"). Deliberations of the Compensation Committee in connection with the Compensation Process are contemporaneously documented. When valuating officers and key employees, the Compensation Committee carefully considers the following factors: (i) duties and responsibilities, (ii) background and experience, (iii) dedication, commitment and work schedule, (iv) leadership, management and professional skills, (v) overall performance and standing, (vi) BSO's salary scale of employees generally, and (vii) the BSO's annual budget.The Compensation Committee's most recent review of officer and key employee compensation occurred in June 2025.
Form 990, Part VI, Section C, Line 19	The Boston Symphony Orchestra's audited financial statements, conflict of interest policy and other governing documents are available up on request.
Form 990, Part VII, Section A, Line 1b	Compensation reported is based on the calendar year 2024 amounts.
Form 990, Part VII, Section B, Line 1(C)	Compensation reported is based on the calendar year 2024 amounts.
Form 990, Part IX, Line 11g	Comprised of $17,481,752 of artistic and concert related fees and $2,501,116 of consulting services.
Form 990, Part XI, Line 9	Other changes in net assets or fund balances of $12,465,570 is comprised of the change in value of split interest agreements of $634,863 and retirement plan-related credits, other than net periodic benefit costs of $11,830,707.

Schedule R IRS990ScheduleR

Id Related Tax Exempt Org IdRelatedTaxExemptOrgGrp

Disregarded Entity Name DisregardedEntityName

Field	Value	IRS element (for citing)
Business Name Line1	Boston 4 Celebrations Foundation Inc	BusinessNameLine1Txt

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	301 Massachusetts Avenue	AddressLine1Txt
City	Boston	CityNm
State Abbreviation	MA	StateAbbreviationCd
ZIP	02115	ZIPCd

Field	Value	IRS element (for citing)
EIN	043311403	EIN
Primary Activities	Provide for public celebration on July 4th	PrimaryActivitiesTxt
Legal Domicile State	MA	LegalDomicileStateCd
Exempt Code Section	501 (c) (3)	ExemptCodeSectionTxt
Public Charity Status	II	PublicCharityStatusTxt

Direct Controlling Entity Name DirectControllingEntityName

Field	Value	IRS element (for citing)
Business Name Line1	Boston Symphony Orchestra Inc	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Controlled Organization	Yes (1)	ControlledOrganizationInd

Id Related Org Txbl Partnership IdRelatedOrgTxblPartnershipGrp

Related Organization Name RelatedOrganizationName

Field	Value	IRS element (for citing)
Business Name Line1	263 HA Limited Partnership	BusinessNameLine1Txt

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	301 Massachusetts Avenue	AddressLine1Txt
City	Boston	CityNm
State Abbreviation	MA	StateAbbreviationCd
ZIP	02115	ZIPCd

Field	Value	IRS element (for citing)
Primary Activities	Real Estate	PrimaryActivitiesTxt
Legal Domicile State	MA	LegalDomicileStateCd

Direct Controlling Entity Name DirectControllingEntityName

Field	Value	IRS element (for citing)
Business Name Line1	263 Realty Corporation	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Predominant Income Type	Excluded	PredominantIncomeTypeTxt
Share Of Total Income	$2,138,808	ShareOfTotalIncomeAmt
Share Of EOY Assets	$8,988,832	ShareOfEOYAssetsAmt
Disproportionate Allocations	0	DisproportionateAllocationsInd
General Or Managing Partner	0	GeneralOrManagingPartnerInd
Ownership	0.99	OwnershipPct

Id Related Org Txbl Corp Tr IdRelatedOrgTxblCorpTrGrp (2 entries)

Address Line1USAddress/AddressLine1Txt	CityUSAddress/CityNm	State AbbreviationUSAddress/StateAbbreviationCd	ZIPUSAddress/ZIPCd	EINEIN	Primary ActivitiesPrimaryActivitiesTxt	Legal Domicile StateLegalDomicileStateCd	Business Name Line1DirectControllingEntityName/BusinessNameLine1Txt	Entity TypeEntityTypeTxt	Share Of Total IncomeShareOfTotalIncomeAmt	Share Of EOY AssetsShareOfEOYAssetsAmt	OwnershipOwnershipPct	Controlled OrganizationControlledOrganizationInd
263 Realty Corporation
301 Massachusetts Avenue	Boston	MA	02115	043252433	Real Estate	MA	Boston Symphony	C	$22,089	$58,866	1	Yes (1)
Boston Symphony Orchestra Pensions Trust Fund
301 Massachusetts Avenue	Boston	MA	02115	113833934	Trust	MA	Boston Symphony	T				Yes (1)

Field	Value	IRS element (for citing)
Receipt Of Int Annts Rnts Rylts	0	ReceiptOfIntAnntsRntsRyltsInd
Gift Grnt Or Cap Contri To Oth Org	0	GiftGrntOrCapContriToOthOrgInd
Gift Grnt Cap Contri From Oth Org	0	GiftGrntCapContriFromOthOrgInd
Loans Or Guarantees To Other Org	Yes (1)	LoansOrGuaranteesToOtherOrgInd
Loans Or Guarantees From Oth Org	0	LoansOrGuaranteesFromOthOrgInd
Div Related Organization	0	DivRelatedOrganizationInd
Asset Sale To Other Org	0	AssetSaleToOtherOrgInd
Asset Purchase From Other Org	0	AssetPurchaseFromOtherOrgInd
Asset Exchange	0	AssetExchangeInd
Rental Of Facilities To Oth Org	0	RentalOfFacilitiesToOthOrgInd
Rental Of Fclts From Oth Org	Yes (1)	RentalOfFcltsFromOthOrgInd
Perform Of Services For Oth Org	0	PerformOfServicesForOthOrgInd
Perform Of Services By Other Org	0	PerformOfServicesByOtherOrgInd
Sharing Of Facilities	Yes (1)	SharingOfFacilitiesInd
Paid Employees Sharing	Yes (1)	PaidEmployeesSharingInd
Reimbursement Paid To Other Org	0	ReimbursementPaidToOtherOrgInd
Reimbursement Paid By Other Org	0	ReimbursementPaidByOtherOrgInd
Transfer To Other Org	0	TransferToOtherOrgInd
Transfer From Other Org	Yes (1)	TransferFromOtherOrgInd

Transactions Related Org TransactionsRelatedOrgGrp (3 entries)

Transaction TypeTransactionTypeTxt	InvolvedInvolvedAmt	Method Of Amount DeterminationMethodOfAmountDeterminationTxt
263 HA Limited Partnership
k	$352,201	Fair market value
263 HA Limited Partnership
s	$1,581,999	Actual partnership distribution
Boston 4 Celebrations Foundation Inc
d	$1,624,583	Book amount