2026-04-03T08:15:24-04:00 2025-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2025-01-01 200983965 The KCS Pacific Foundation Inc % Foundation Source KCSP 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 Conor Reardon Vice President 8008391754 2026-03-31 true Jeffrey D Haskell P01345770 8008391754 2025 2025-03-06 01:10:19Z X 2983702 X 0 X 2913 2913 45568 45568 395266 895788 395266 287 287 444034 444034 0 5606 5606 3318 320 18007 89 17918 26931 6015 17918 720533 720533 747464 6015 738451 -303430 438019 0 136022 123768 123768 2148229 1857053 2859934 2284251 1980821 2983702 0 0 X 2284251 1980821 2284251 1980821 2284251 1980821 2284251 -303430 1980821 1980821 Publicly-traded Securities 895788 500522 395266 395266 395266 6088 6088 6088 1800 0 1800 X 0 4288 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 Katharine Brigham Foundation Source 501 Silverside Rd Wilmington DE 198091377 Pres, Dir, Sec 1.0 0 0 0 Conor C Reardon Foundation Source 501 Silverside Rd Wilmington DE 198091377 VP 1.0 0 0 0 2948481 105874 0 3054355 0 3054355 45815 3008540 150427 150427 6088 6088 144339 144339 144339 738451 0 0 0 0 738451 144339 157609 2023 2022 2021 738451 157609 144339 436503 436503 0 436503 436503 Conor C Reardon Katharine Brigham X AFRICAN WILDLIFE FOUNDATION 1100 NEW JERSEY AVE SE STE 900 WASHINGTON DC 20003 N/A PC Bili-Uele landscape DRC Project 50000 CENTER FOR BIOLOGICAL DIVERSITY INC PO BOX 710 TUCSON AZ 85702 N/A PC Health for the Wild Fund 50000 CENTER FOR BIOLOGICAL DIVERSITY INC PO BOX 710 TUCSON AZ 85702 N/A PC Arctic Defense Fund 50000 COLORADO WOLF AND WILDLIFE CENTER PO BOX 713 DIVIDE CO 80814 N/A PC General & Unrestricted 2000 EARTH LAW CENTER 530 MAIN AVE STE F DURANGO CO 81301 N/A PC Sustainable Future Project 2500 GLOBALGIVING FOUNDATION INC 1 THOMAS CIR NW SUITE 800 WASHINGTON DC 20005 N/A PC General & Unrestricted 10000 NATIONAL WILDLIFE REFUGE ASSOCIATION 1701 K STREET NW STE 550 WASHINGTON DC 20006 N/A PC General & Unrestricted 2500 NATURE CONSERVANCY 4245 N FAIRFAX DRIVE STE 100 ARLINGTON VA 22203 N/A PC Charitable Event 150000 PANTHERA CORPORATION 104 W 40TH ST 5TH FL NEW YORK NY 10018 N/A PC Charitable Event 12000 PARTNERS IN HEALTH A NONPROFIT CORPORATION PO BOX 996 FREDERICK MD 21705 N/A PC Charitable Event 90533 PARTNERS IN HEALTH A NONPROFIT CORPORATION PO BOX 996 FREDERICK MD 21705 N/A PC Charitable Event 100000 PROJECT GRIPH 1859 CLUGSTON ONION CREEK RD COLVILLE WA 99114 N/A PC General & Unrestricted 5000 SISTER CARMEN COMMUNITY CENTER INC 655 ASPEN RIDGE DR LAFAYETTE CO 80026 N/A PC General & Unrestricted 3500 SOLAR ELECTRIC LIGHT FUND 2021 L ST NW STE 101-344 WASHINGTON DC 20036 N/A PC Uganda water project 9000 SOLAR ELECTRIC LIGHT FUND 2021 L ST NW STE 101-344 WASHINGTON DC 20036 N/A PC Maasai Mara Conservancy Project: rhino sanctuary pumping system 31000 WORLD CENTRAL KITCHEN INCORPORATED PO BOX 96538 WASHINGTON DC 20090 N/A PC General & Unrestricted 2500 YELLOWSTONE TO YUKON CONSERVATION INITIATIVE PO BOX 157 BOZEMAN MT 59771 N/A PC Ross River Fund 150000 720533 14 2913 14 45568 18 395266 CLASS ACTION LAWSUIT PROCEEDS 01 287 444034 444034 false false false false false false false false false false AB SUST INTL THEMATIC-Z 104982 137150 ALPHABET INC CL A 55234 197815 AMAZON COM 61519 140569 APPLE INC 28226 43769 APPLIED MATERIALS INC 21587 37521 ARISTA NETWORKS 7058 71149 BANK OF AMERICA CORP 17671 31350 BARON SMALL CAP INSTL CL 58118 71501 BECTON DICKINSON & CO 12466 16496 BERKSHIRE HATHAWAY INC. CLASS 48464 89472 BROWN ADVISORY SUSTAINABILITY 86247 153613 CAPITAL ONE FINANCIAL CORP 23009 25448 CENCORA INC 11459 51338 CIGNA CORPORATION 30861 44312 COLGATE-PALMOLIVE COMPANY 25590 26235 COMPASS GROUP PLC ADR 30080 45565 COTERRA ENERGY INC 16606 17424 CSX CORP 12287 21388 DAVITA HEALTHCARE PARTNERS INC 14884 11815 GODADDY INC 26711 46282 GRAINGER W W INC 10842 30272 HOME DEPOT INC 7560 8603 INTERACTIVE BROKERS GROUP, INC 40425 104182 INTUIT 3130 24510 INVESCO WATER RESOURCES ETF 41673 84491 JP MORGAN CHASE 11911 37378 KYNDRYL HOLDINGS INC 73252 55059 LAZARD GLOBAL LISTED INFRASTRU 52290 66258 MASTERCARD INC 24099 61655 MICROSOFT CORP 42021 116552 OTIS WORLDWIDE CORP 11768 16771 PARNASSUS MID CAP FUND 78574 90304 PIMCO INCOME FUND 139613 139360 PRINCIPAL MIDCAP FUND; R6 39693 88148 PROGRESSIVE CORP OHIO 15627 38029 PZENA EMERGING MARKETS FOCUSED 45888 62906 ROCHE HOLDING LTD ADR 17842 27126 SHERWIN-WILLIAMS CO 10073 21710 TAIWAN SEMICONDUCTOR MFG CO LT 16073 16410 TEXAS INSTRUMENTS INC 8552 35218 TIAA-CREF CORE IMPACT BOND FUN 151873 130984 TJX COMPANIES INC 15240 18740 TRANE TECHNOLOGIES PLC 14932 13622 TSTONE SANDS CAP EMERG CLR6 50521 59624 UNITED RENTALS INC 7558 27517 VANGUARD INTERMEDIATE TERM COR 32104 33500 VANGUARD TOTAL BOND MARKET IND 200860 170793 Administrative Fees 17893 17893 Bank Charges 89 89 State or Local Filing Fees 25 25 Class Action Lawsuit Proceeds 287 287 Investment Management Services 5606 5606 990-PF Estimated Tax for 2025 1800 990-PF Excise Tax for 2024 1198 Foreign Tax Paid 320 320