2026-05-06T11:03:07-04:00 2025-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2025-01-01 472158353 Glenlaurel Foundation % Foundation Source GLEN 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 Stephen McKnight President 8008391754 2026-04-27 true Jeffrey D Haskell P01345770 8008391754 2025 2025-03-06 01:10:19Z X 2243218 X 415489 3416 3416 39226 39226 268493 1060110 527534 726624 570176 0 10550 10550 1383 158 11656 15 11641 23589 10723 11641 71000 71000 94589 10723 82641 632035 559453 0 52126 360713 360713 1192995 1516443 1882505 1245121 1877156 2243218 0 0 X 1245121 1877156 1245121 1877156 1245121 1877156 1245121 632035 1877156 1877156 Publicly-traded Securities 1060110 532576 527534 527534 527534 7776 7776 7776 1200 0 1200 X 0 6576 0 false false false false false false false true true DE true false false false false true Foundation Source 8008391754 501 Silverside Road Suite 123 Wilmington DE 198091377 false false false false false false false false false false false false false false false false false false false false false Peggy T McKnight Foundation Source 501 Silverside Rd Wilmington DE 198091377 VP, Dir 1.0 0 0 0 Stephen H McKnight Foundation Source 501 Silverside Rd Wilmington DE 198091377 Pres, Dir, Sec, Treas 1.0 0 0 0 1709574 103940 0 1813514 0 1813514 27203 1786311 89316 89316 7776 7776 81540 81540 81540 82641 0 0 0 0 82641 81540 81685 2023 2022 2021 82641 81685 956 0 0 80584 0 0 Peggy T McKnight Stephen H McKnight X CARNEGIE MUSEUMS OF PITTSBURGH 4400 FORBES AVE PITTSBURGH PA 15213 N/A PC Carnegie Museums Capital Campaign 25000 CARNEGIE MUSEUMS OF PITTSBURGH 4400 FORBES AVE PITTSBURGH PA 15213 N/A PC Carnegie International 16000 CREATING PITTSBURGH TOMORROW INC 1140 FOX CHAPEL RD PITTSBURGH PA 15238 N/A PC General & Unrestricted 5000 PITTSBURGH CULTURAL TRUST 803 LIBERTY AVE PITTSBURGH PA 15222 N/A PC General & Unrestricted 25000 71000 14 3416 14 39226 18 268493 311135 311135 false false false false false false false false false false X X 1 McKnight Stephen H 1384 Old Freeport Road Suite 2BR Pittsburgh PA 15238 415489 X 1 APPLE INC AAPL, 1533 sh. 415489 2025-12-23 ABBVIE INC 7845 11881 ADVANCED MICRO DEVICES INC 5151 6639 AIR PRODS & CHEM INC 6497 5681 ALPHABET INC CL C 20917 31380 AMAZON COM 29096 40624 AMERICAN ELECTRIC POWER INC 7186 10147 AMERICAN TOWER REIT INC 5432 4916 AMETEK INC 15763 18273 AMPHENOL CORPORATION 8154 21352 ANALOG DEVICES INC 12886 17628 APPLE INC 162875 176437 ARISTA NETWORKS 5340 5765 AXON ENTERPRISE 2209 1704 BANK OF AMERICA CORP 11103 22000 BERKSHIRE HATHAWAY INC. 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