WILMINGTON HISTORICAL SOCIETY
Cite this
Plain text WILMINGTON HISTORICAL SOCIETY. Strategy Studio, nonprofit organization profile, tax years 2025. https://strategystudio.org/org/330318784. Retrieved 2026-10-19.
APA Strategy Studio. (n.d.). WILMINGTON HISTORICAL SOCIETY [Nonprofit organization profile; tax years 2025]. Retrieved October 19, 2026, from https://strategystudio.org/org/330318784
MLA “WILMINGTON HISTORICAL SOCIETY.” Strategy Studio, tax years 2025, https://strategystudio.org/org/330318784. Accessed 19 Oct. 2026.
Retrieved 2026-10-19; covers tax years 2025. Data: Strategy Studio, CC BY 4.0.
2025 · Form 990EZ · revenue $70K · expenses $59K · assets $26K
- EIN
- 33-0318784
- Address
- 309 W OPP ST, WILMINGTON, CA 90744-3412
- NTEE code
- A80
- Subsection
- 501(c)(3)
- Ruling year
- 2019
- Cross-check
- ProPublica Nonprofit Explorer
Mission
We collect, archive, digitize, educate and make available to the public the local history of Wilmington California.
Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).
People paid by the organization
None of the 2 people listed on these returns reported compensation from the organization. They are listed below.
Officers and directors, no compensation reported
2 people listed on the returns with $0 (or no amount) in every compensation column: current people first. Hours are as filed on the latest return each person appears on.
| Name | Latest title | Years | Hrs/wk (latest) | Compensation | Organizations |
|---|---|---|---|---|---|
| Laura Mohberg | Treasurer | 2025 | 30 | $0 reported | 1 |
| Simie Seaman | President | 2025 | 10 | $0 reported | 1 |
People by year
2025 · 2 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Laura Mohberg | Treasurer | 30 | $0 | - | $0 | $0 | 1 |
| Simie Seaman | President | 10 | $0 | - | $0 | $0 | 1 |
Highest-paid independent contractors
No independent contractors reported.
Who gave
Contributor names are not public for this form type.
Public charities filing Form 990 or 990-EZ report large donors on Schedule B, but the IRS withholds their names and addresses from public copies. Private foundations (990-PF) are different: their contributors are public.
Finances
Newest first. Each filing: its name on one row, its figures on the row beneath. Greyed filings are superseded by a later return for the same period and are left out everywhere else on this page.
| Revenue | Expenses | Assets | Net assets | Contributions | Program revenue | Officer pay | Employees | Volunteers |
|---|---|---|---|---|---|---|---|---|
| 2025 · Form 990EZ | ||||||||
| $70,447 | $59,021 | $25,894 | $25,894 | $70,132 | $0 | - | - | - |
Funders of this organization
4 grantors reported grants to this organization, $22,648 in all, tax years 2020 to 2024. Exact: the grantor wrote this organization's EIN. Fuzzy: the grantor wrote only a name (foundations' 990-PF has no EIN field), matched to the same or a near-identical name in the same state; the name as filed is shown. From the latest return for each grantor and year, so amended returns aren't counted twice. CSV
| Grantor | Type | Match | Years given | Grants | Total | Latest year | Latest year's amount | Grants |
|---|---|---|---|---|---|---|---|---|
| LOCAL INITIATIVES SUPPORT CORPORATION | Public charity | Exact | 2020 | 1 | $15,000 | 2020 | $15,000 | show |
| Marathon Petroleum Foundation Inc | Private foundation | Fuzzy filed as “WILMINGTON HISTORICAL SOCIETY” | 2021 | 1 | $5,000 | 2021 | $5,000 | show |
| BANC OF CALIFORNIA CHARITABLE FOUNDATION | Private foundation | Fuzzy filed as “Wilmington Historical Society” | 2024 | 1 | $2,500 | 2024 | $2,500 | show |
| AMAZONSMILE FOUNDATION | Private foundation | Fuzzy filed as “WILMINGTON HISTORICAL SOCIETY” | 2022-2023 | 2 | $148 | 2023 | $62 | show |
Similar organizations
Ranked without any AI: same NTEE code first, then the same NTEE group; then revenue within 2x, 5x or 10x; then the same state; then similar name and mission text. Same state only · More (100)
| Organization | State | NTEE | Latest revenue | Latest expenses | Top-paid title | Top pay | Why similar |
|---|---|---|---|---|---|---|---|
| DIXON HISTORICAL SOCIETY | CA | A80 | $77,391 | $70,738 | President | $0 | Same NTEE code A80, revenue within 2x, same state, similar name |
| ARTESIA HISTORICAL SOCIETY | CA | A80 | $63,232 | $12,862 | Treasurer | $0 | Same NTEE code A80, revenue within 2x, same state, similar name |
| ST HELENA HISTORICAL SOCIETY | CA | A80 | $93,017 | $91,889 | TREASURER | $0 | Same NTEE code A80, revenue within 2x, same state, similar name |
| TEMECULA VALLEY HISTORICAL SOCIETY | CA | A80 | $92,595 | $82,286 | PRESIDENT | $0 | Same NTEE code A80, revenue within 2x, same state, similar name |
| TURLOCK HISTORICAL SOCIETY | CA | A80 | $75,298 | $39,147 | President | $0 | Same NTEE code A80, revenue within 2x, same state, similar name |
| 463RD BOMB GROUP HISTORICAL SOCIETY | CA | A80 | $70,010 | $9,547 | President | $0 | Same NTEE code A80, revenue within 2x, same state, similar name |
| THREE RIVERS HISTORICAL SOCIETY | CA | A80 | $56,495 | $56,516 | Director | $0 | Same NTEE code A80, revenue within 2x, same state, similar name |
| RANCHO BERNARDO HISTORICAL SOCIETY | CA | A80 | $89,347 | $104,901 | TREASURER | $0 | Same NTEE code A80, revenue within 2x, same state, similar name |
| CALIFORNIA HISTORICAL ARTILLERY SOCIETY | CA | A80 | $55,906 | $66,019 | President | $0 | Same NTEE code A80, revenue within 2x, same state |
| EIGHTH AIR FORCE HISTORICAL SOCIETY INC | CA | A80 | $91,874 | $100,045 | VICE PRESIDE | $0 | Same NTEE code A80, revenue within 2x, same state |
| HISTORICAL PRESERVATION FOUNDATION OF THE NATIVE SONS OF GOLDEN WEST | CA | A80 | $67,670 | $37,616 | Secretary | $0 | Same NTEE code A80, revenue within 2x, same state |
| MOTHER LODE MINERAL SOCIETY | CA | A80 | $66,541 | $100,833 | PRESIDENT | $0 | Same NTEE code A80, revenue within 2x, same state |
| HYPERION HISTORICAL ALLIANCE | CA | A80 | $82,985 | $56,294 | President & CEO | $0 | Same NTEE code A80, revenue within 2x, same state |
| SAUSALITO WOMANS CLUB PRESERVATION SOCIETY | CA | A80 | $53,316 | $57,012 | Director | $0 | Same NTEE code A80, revenue within 2x, same state |
| MILLIKEN MUSEUM SOCIETY | CA | A80 | $68,656 | $15,307 | President | $0 | Same NTEE code A80, revenue within 2x, same state |
| NATIONAL SOCIETY OF THE DAUGHTERS OF THE AMERICAN REVOLUTION | CA | A80 | $57,377 | $49,934 | TREASURER | $0 | Same NTEE code A80, revenue within 2x, same state |
| BLUE OX HISTORIC VILLAGE AND SCHOOL | CA | A80 | $83,045 | $86,383 | DIRECTOR | $0 | Same NTEE code A80, revenue within 2x, same state |
| ANTIQUE & CLASSIC BOAT SOCIETY NO CAL-LAKE TAHOE CHAPTER | CA | A80 | $66,126 | $74,803 | President | $0 | Same NTEE code A80, revenue within 2x, same state |
| LEGION SIX HISTORICAL FOUNDATION INC | CA | A80 | $77,980 | $155,718 | PRESIDENT | $0 | Same NTEE code A80, revenue within 2x, same state |
| SARATOGA FOOTHILL CLUB HISTORICAL LANDMARK FOUNDATION | CA | A80 | $85,228 | $45,932 | Recording Secty | $0 | Same NTEE code A80, revenue within 2x, same state |
| VENICE CANALS ASSOCIATION | CA | A80 | $69,960 | $82,295 | President and Director | $0 | Same NTEE code A80, revenue within 2x, same state |
| MISSION HILLS HERITAGE | CA | A80 | $57,970 | $64,979 | President | $0 | Same NTEE code A80, revenue within 2x, same state |
| CARSON & COLORADO RAILWAY INC | CA | A80 | $74,982 | $32,933 | PRESIDENT | $0 | Same NTEE code A80, revenue within 2x, same state |
| CENTRAL VALLEY HOLOCAUST EDUCATORS NETWORK | CA | A80 | $64,341 | $57,909 | DIRECTOR | $14,500 | Same NTEE code A80, revenue within 2x, same state |
| CAMARILLO RANCH FOUNDATION INC | CA | A80 | $81,758 | $58,310 | President | $0 | Same NTEE code A80, revenue within 2x, same state |
Who funds organizations like this
Grantors that funded the 100 most similar organizations. Ranked by total given to them. Foundations (990-PF) and donor-advised fund sponsors only. Same matching as Funders above (by EIN, or by name for foundations).
The full list · all similar organizations
Where the money went
Every expense line on each return, biggest first: Form 990 Part IX (with its program, management and fundraising columns), 990-EZ Part I, or 990-PF Part I. Event marks lines the organization itself describes as events. “Events” in each summary adds those lines, conferences and meetings, and the direct costs of fundraising events. Unusual is not the same as improper. Many of these patterns have ordinary explanations. Check the filing.
2025 · Form 990EZ · $59,021 spent · pay $0 · grants $0 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| Occupancy, rent, utilities, maintenance | $37,601 | 63.7% | |
| Other expenses (detail on Schedule O) | $12,568 | 21.3% | |
| Fees to independent contractors | $8,835 | 15.0% | |
| Printing, publications, postage | $17 | 0.0% | |
| Total | $59,021 | 100% |