2026-09-22T10:12:12-05:00 2025-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2025-01-01 854251257 MacKenzie Ryan Brumberg Foundation % Foundation Source MACK 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 D Ryan Brumberg President 8008391754 2026-09-14 true Jeffrey D Haskell P01345770 8008391754 2025 X 23007887 X 0 X 1186 1186 4474180 4474180 4120855 4120855 8596221 8596221 0 177388 74757 28526 46231 252145 28526 46231 646975 646975 899120 28526 693206 7697101 8567695 0 13653 184351 184351 9869894 9812012 21889477 19545986 13011524 21903130 29600231 23007887 0 0 X 21903130 29600231 21903130 29600231 21903130 29600231 21903130 7697101 29600231 29600231 Passthrough K1 Capital Gain/(Loss) 4474180 4474180 119091 119091 119091 19600 0 99500 119100 X 3870 3861 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 D Ryan Brumberg Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, Pres 1.0 0 0 0 MacKenzie Wright Brumberg Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, Sec, Treas 1.0 0 0 0 817668 103375 13011524 13932567 0 13932567 208989 13723578 686179 686179 119091 119091 567088 567088 567088 693206 0 0 0 0 693206 567088 682024 2023 2022 2021 693206 682024 11182 0 0 555906 0 0 D Ryan Brumberg X BALLET THEATRE FOUNDATION INC 890 BROADWAY 3RD FL NEW YORK NY 10003 N/A PC General & Unrestricted 25000 CENTRAL FUND OF ISRAEL 429 CENTRAL AVE CEDARHURST NY 11516 N/A PC Israel Advocacy fund 25000 FS CHARITABLE FUND 501 SILVERSIDE RD STE 123 WILMINGTON DE 19809 N/A PC Round Hill Children's Museum fund 530000 GREENWICH RIDING & TRAILS ASSOCIATION INC PO BOX 1403 GREENWICH CT 06836 N/A PC General & Unrestricted 10000 ROUND HILL ASSOCIATION INC 50 CLOVERLEAF LN GREENWICH CT 06831 N/A PC General & Unrestricted 12500 STANFORD LAW SCHOOL CROWN QUADRANGLE 559 NATHAN ABBOTT WAY STANFORD CA 94305 N/A PC Stanford Law School Federalist Society fund 25000 UNITED WAY OF GREENWICH INC 2 DEARFIELD DR STE 300 GREENWICH CT 06831 N/A PC General & Unrestricted 6975 UNIVERSITY OF SOUTHERN CALIFORNIA 3551 TROUSDALE PKWY ADM 160 LOS ANGELES CA 90089 N/A PC to support an annual or semi-annual business law, corporate and commercial law, or law and finance seminar 12500 646975 14 1186 18 4474180 K-1 Inc/Loss 14 4120855 8596221 8596221 false false false false false false false false false false VANGUARD TOTAL STOCK MARKET ET 9869894 9812012 AP FAMILY OFFICE LIMITED PARTN 19545986 13011524 Administrative Fees 46206 46206 K-1 Exp AP FAMILY OFFICE LIMIT 28526 28526 State or Local Filing Fees 25 25 K-1 Inc/Loss AP FAMILY OFFICE LIMITED PARTNERSHIP 4120855 4120855 990-PF Estimated Tax for 2025 19600 990-PF Excise Tax for 2024 91188 990-PF Extension for 2024 66600