2026-09-15T12:10:53-05:00 2025-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2025-01-01 922880502 The Double T Family Foundation % Foundation Source DOUB 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 Michael Lin Secretary 8008391754 2026-09-03 true Jeffrey D Haskell P01345770 8008391754 2025 X 11328553 X 0 X 272010 272010 62697 62697 -41 1000000 0 -1375 651 333291 335358 0 4845 245 29952 142 29761 34797 387 29761 488335 488335 523132 387 518096 -189841 334971 0 7082078 6900399 6900399 3112620 3112620 4345704 57959 49797 82450 10252657 10062816 11328553 0 0 X 10252657 10062816 10252657 10062816 10252657 10062816 10252657 -189841 10062816 10062816 Publicly-traded Securities 1000000 1000000 Passthrough K1 Capital Gain/(Loss) -41 -41 4656 4656 4656 4816 0 4816 X 28 132 132 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 Michael Y Lin Foundation Source 501 Silverside Rd Wilmington DE 198091377 Sec 1.0 0 0 0 Arden Mertz Foundation Source 501 Silverside Rd Wilmington DE 198091377 Treas 1.0 0 0 0 Jean Christine Thompson Foundation Source 501 Silverside Rd Wilmington DE 198091377 Pres, Dir 1.0 0 0 0 David Wang Foundation Source 501 Silverside Rd Wilmington DE 198091377 Treas 1.0 0 0 0 Brent Wouters Foundation Source 501 Silverside Rd Wilmington DE 198091377 Treas 1.0 0 0 0 4484550 6635306 0 11119856 0 11119856 166798 10953058 547653 547653 4656 4656 542997 542997 542997 518096 0 0 0 0 518096 542997 510868 2023 2022 2021 518096 510868 7228 0 0 535769 0 0 NONE X CONSERVATION LEGACY 701 CAMINO DEL RIO STE 101 DURANGO CO 81301 N/A PC Support of the Rio Grande National Forest/Conejos Peak South San Juan Wilderness Trails Maintenance Work 223335 FREEDOM COLLIE RESCUE INC 6140 TEXAS 6 PMB 171 MISSOURI CITY TX 77459 N/A PC General & Unrestricted 25000 YELLOWSTONE FOREVER PO BOX 1857 BOZEMAN MT 59771 N/A PC Support of the Elk Calf Survival Study and the Ranger Stock Program 240000 488335 14 272010 14 62697 18 -41 K-1 Inc/Loss 525990 -2026 14 651 -2026 335317 333291 false false false false false false false false false false Form 990-PF Form 990-PF One or more partnerships have provided a Schedule K-3 for the tax year in which they have checked one or more of the boxes in Part I but not provided sufficient back-up information to allow the Foundation to verify why such boxes were checked or the extent to which the checking of such boxes affects any item on this return. The Foundation has prepared this return to the best of its ability and without any foreign filings for such partnerships based on the information provided to it by these partnerships and on the basis of having received no information to the contrary. Any missing or incomplete information is due to the Foundation's inability to obtain such information and is not a willful attempt to withhold such information. ABBOTT LABS 157247 188812 ACCENTURE PLC 277221 244690 ALPHABET INC CL A 254910 625999 AMAZON COM 449310 646757 APPLE INC 214369 339825 ASML HOLDING NV NY REG SHS 195792 213972 AT&T, INC 165473 248400 BERKSHIRE HATHAWAY INC. CLASS 68639 100530 CHEVRON CORP 45005 45723 DOLLAR TREE INC 439337 462026 EXXON MOBIL CORP 27211 30085 HOME DEPOT INC 35116 43013 MCDONALD'S CORP 79137 91689 MERCK & CO INC 10302 10526 MICROSOFT CORP 343015 483620 NIO INC 7680 5100 ON HOLDING ORD SHS CLASS A 16820 23240 TAIWAN SEMICONDUCTOR MFG CO LT 44913 151945 THERMO FISHER SCIENTIFIC INC 161850 214397 VISA INC 119273 175355 ENERGY TRANSFER LP 49797 82450 Administrative Fees 29707 29707 Bank Charges 20 20 K-1 Exp ENERGY TRANSFER LP 171 122 Postage/Delivery Service 29 29 State or Local Filing Fees 25 25 K-1 Inc/Loss ENERGY TRANSFER LP -1375 651 990-PF Estimated Tax for 2025 4600 Foreign Tax Paid 245 245