2026-09-01T16:42:01-04:00 2025-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2025-01-01 464598136 The Martyn Family Foundation % Foundation Source MART 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 Kevin Martyn President 8008391754 2026-08-25 true Jeffrey D Haskell P01345770 8008391754 2025 X 1135573 X 0 X 204 204 19783 18773 118972 524979 118972 138959 137949 0 2432 32 14105 14105 16537 32 14105 175000 175000 191537 32 189105 -52578 137917 0 66102 42879 42879 882039 852684 1092694 948141 895563 1135573 0 0 X 948141 895563 948141 895563 948141 895563 948141 -52578 895563 895563 Publicly-traded Securities 524979 406007 118972 118972 118972 1917 1917 1917 1463 0 500 1963 X 0 46 46 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 Kevin P Martyn Foundation Source 501 Silverside Rd Wilmington DE 198091377 Pres, Dir, Sec, Treas 1.0 0 0 0 1108746 41483 0 1150229 0 1150229 17253 1132976 56649 56649 1917 1917 54732 54732 54732 189105 0 0 0 0 189105 54732 2023 2022 2021 110616 217916 140700 135245 116070 720547 189105 54732 134373 854920 0 110616 744304 217916 140700 135245 116070 134373 Kevin P Martyn X COMPASS HEALTH 4526 FEDERAL AVE M/S 49 EVERETT WA 98203 N/A PC General & Unrestricted 100000 MENTAL HEALTH CORPORATION OF AMERICA INC PO BOX 12037 TALLAHASSEE FL 32317 N/A PC General & Unrestricted 45000 RENTON REGIONAL COMMUNITY FOUNDATION PO BOX 820 RENTON WA 98057 N/A PC General & Unrestricted 10000 SEATTLE RUGBY FOOTBALL CLUB 4103 SW OTHELLO ST SEATTLE WA 98136 N/A PC General & Unrestricted 20000 175000 14 204 14 19783 18 118972 138959 138959 false false false false false false false false false false ALPHABET INC CL A 14577 38812 AMAZON COM 16781 35315 AMPHENOL CORPORATION 17412 17028 APPLE INC 23323 35342 APPLOVIN CORP 17629 18867 BROADCOM INC 18375 21804 CHARLES SCHWAB INTRNTNL EQ 45219 54715 COSTCO WHOLESALE CORPORATION 39375 34494 ECOLAB INC 18568 24677 FLMI 24942 25716 GOLDMAN SACHS GROUP 17446 33402 INVESCO NATIONAL AMT-FREE MUNI 25307 24976 ISHARES BROAD USD HIGH YIELD C 13790 14621 ISHARES S&P NATIONAL AMT FREE 31879 32026 JP MORGAN CHASE 26068 26744 MICROSOFT CORP 29571 42075 NATERA INC 17379 19931 NETFLIX INC 22798 26253 SCHWAB STRATEGIC TR US LARGE C 16532 22030 SCHWAB U.S. LARGE-CAP GROWTH 27889 48669 UNITEDHEALTH GROUP INC 18147 19807 VANGUARD GROWTH ETF 29000 53665 VANGUARD INFORMATION TECHNOLOG 30000 45981 VANGUARD INT TRM BD 28416 29283 VANGUARD LG-CAP ETF 35262 52886 VANGUARD LONG TERM BOND 34624 33300 VANGUARD MORTGAGE-BACKED SEC I 26349 25376 VANGUARD SF REIT ETF 19989 19645 VANGUARD SM-CAP ETF 36175 44625 VANGUARD SMALL-CAP GROWTH ETF 23627 31117 VANGUARD SMALL-CAP VALUE ETF 26521 31133 VANGUARD TAX-EXEMPT BOND ETF 24534 24642 VANGUARD VALUE ETF 36231 49084 VERTIV CL A 6554 15715 VISA INC 12395 18938 Administrative Fees 14028 14028 Postage/Delivery Service 52 52 State or Local Filing Fees 25 25 990-PF Estimated Tax for 2025 1400 990-PF Extension for 2024 1000 Foreign Tax Paid 32 32