2026-03-10T07:28:48-07:00 2025-12-31 Kenneth Miller CPA 50 Everett Avenue Bristol RI 02809 990PF 2025-01-01 843815082 William Mead Regan Foundation WILL 9175920099 PO Box 2058 Southampton NY 11969 Elizabeth D Regan President 9175920099 2026-03-10 true Kenneth Miller P00401192 2033375478 X 2025 2025-03-06 01:10:19Z X 765914 X X 27 27 12248 12248 62210 141249 62210 74485 74485 5259 5259 4421 18 591 591 10271 5868 0 49500 49500 59771 5868 49500 14714 68617 31110 27806 22806 478246 490765 743108 509356 518571 765914 0 X 509356 518571 509356 518571 509356 518571 509356 14714 524070 5499 518571 Public Traded Securities - ST P 14419 11280 3139 3139 Public Traded Securities - LT P 126830 67759 59071 59071 62210 62210 954 954 954 1629 1629 675 675 false false false false false false false false true DE false false false false false true N/A Elizabeth and Andrew Regan 9175930099 82 Pine Street Southampton NY 11968 false false false false false false false false false false false false false false false false false false false false false false Andrew W Regan PO Box 2058 Southampton NY 11969 Vice President 0.25 0 Elizabeth D Regan PO Box 2058 Southampton NY 11969 President 0.25 0 Alexandra D Regan PO Box 2058 Southampton NY 11969 Secretary 0.00 0 NONE NONE 702164 55295 0 757459 0 757459 11362 746097 37305 37305 954 954 36351 36351 36351 49500 49500 36351 18242 27046 11007 56295 49500 49500 36351 36351 69444 0 69444 8937 11007 49500 X Memorial Sloan Kettering Cancer Cen 1275 York Avenue New York NY 10065 None PC Lymphoma Research 2500 Coombs Outdoors 85 W Snow King Ave Jackson WY 83001 None PC General Purposes 2500 A Single Bite 92 Commerce Drive Liberty NY 12754 None PC General Purposes 5000 High Fives Non Profit Foundation 10775 Pioneer Trail Truckee CA 96161 None PC General Purposes 5000 The Surfrider Foundation PO Box 73550 San Clemente CA 92673 None PC General Purposes 2500 The Guardsmen 550 Montgomery Street Ste 700 San Francisco CA 94111 None PC General Purposes 10000 We Defy Foundation 4100 Eldorado Pkwy McKinney TX 75070 None PC General Purposes 10000 Beaverkill Valley Land Trust 1350 Broadway Rm 201 New York NY 10018 None PC General Purposes 7500 Open Space Institute 1370 Broadway 5th FL New York NY 10018 None PC General Purposes 1000 Catskill Art Space 48 Main Street Livingston Manor NY 12758 None PC General Purposes 3500 49500 14 27 14 12248 18 62210 74485 74485 false false false false false false false false false false Landmark Management LLC 5259 5259 0 0 The Foundation is organized in DE and the state has no requirement to file Form 990PF unless the organization solicits contributions in the state, which it does not. Tax over Book Income 5499 Filing Fees 591 591 Federal Excise Taxes 4403 Foreign Taxes Paid 18 18