2025-10-30T12:17:33-05:00 2024-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2024-01-01 861199543 Costolo Family Foundation % Foundation Source COST 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 Lovin Costolo President 8008391754 2025-10-20 true true Jeffrey D Haskell P01345770 8008391754 2024 2025-03-06 01:10:19Z X 11133387 X 110752 22682 22682 382243 382243 258913 3925579 0 3537 778127 404925 0 48082 48082 2900 34429 403 34026 85411 48485 34026 420000 420000 505411 48485 454026 272716 356440 0 437791 330210 330210 296203 9262427 9948927 10803177 9996421 10279137 11133387 0 0 X 9996421 10279137 9996421 10279137 9996421 10279137 9996421 272716 10000 10279137 10279137 Publicly-traded Securities 3925579 4648672 -723093 -723093 -723093 4955 4955 4955 6100 0 6100 X 0 1145 1145 false false false false false false false true true CA 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 Lorin Costolo Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, Pres 1.0 0 0 0 Richard Costolo Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, Sec, Treas 1.0 0 0 0 Rose Costolo Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir 1.0 0 0 0 10753048 492647 0 11245695 0 11245695 168685 11077010 553851 553851 4955 4955 548896 10000 558896 558896 454026 0 0 0 0 454026 558896 428727 454026 428727 25299 0 0 533597 0 0 Lorin Costolo Richard Costolo X CONSERVATION INTERNATIONAL FOUNDATION 2011 CRYSTAL DRIVE STE 600 ARLINGTON VA 22202 N/A PC General & Unrestricted 100000 GRAND TETON NATIONAL PARK FOUNDATION PO BOX 249 MOOSE WY 83012 N/A PC General & Unrestricted 100000 PACIFIC WILD ALLIANCE 1567 HIGHLANDS DR NE 110-373 ISSAQUAH WA 98029 N/A PC General & Unrestricted 50000 SARARA INSTITUTE 1031 33RD ST DENVER CO 80205 N/A PC General & Unrestricted 50000 SARARA INSTITUTE 1031 33RD ST DENVER CO 80205 N/A PC To support the Reteti Elephant Sanctuary 10000 THE NATURE CONSERVANCY 250 LAWRENCE HILL RD COLD SPRING HARBOR NY 11724 N/A PC General & Unrestricted 100000 WYOMING WETLANDS SOCIETY PO BOX 3216 JACKSON WY 83001 N/A PC General & Unrestricted 10000 420000 14 22682 14 382243 18 258913 Federal Tax Refund 01 3537 667375 667375 false false false false false false false false false false X X 1 Costolo Richard 970 W Broadway Suite E PMB 472 Jackson WY 83001 110752 X 1 AMPLITUDE ORD SHS CLASS A AMPL, 492 sh. 5343 2024-03-27 1 Confluent, Inc CFLT, 1724 sh. 53388 2024-03-27 1 ROBINHOOD HOOD, 2574 sh. 52021 2024-03-28 3I GROUP PLC ADR 26446 30239 ADOBE SYSTEMS, INC 37421 28015 ADYEN N.V. 19961 22723 AKZO NOBEL NV-ADR 27331 26234 ALCON INC 18931 20374 ALLIANZ SE 6361 8276 ALSTOM 33350 44637 AMADEUS IT HLDS SA 3116 3527 AMER INTERNATIONAL GROUP INC 23405 22350 AMERICAN WATER WORKS COMPANY I 19665 18922 AMERIPRISE FINANCIAL INC 20492 39400 AMGEN INC 20579 22676 ANHEUSER BUSCH COS INC 20805 18977 ANSYS INC 28428 26986 AON PLC CL A 14184 16521 ARCELORMITTAL 14052 14040 ARCH CAPITAL GROUP LTD 22145 28444 ASM INTERNATIONAL NV 11837 18213 ASML HOLDING NV NY REG SHS 24335 24258 ASTRAZENECA 64666 62768 ATLASSIAN CORP CL A 14868 22878 ATMOS ENERGY CORP 23030 27993 AXA ADS 9579 12738 BAE SYSTEMS PLC 20342 21492 BANCO BRADESCO S.A. SPONS ADR 4079 2875 BARCLAYS PLC ADR 23948 42967 BARRICK GOLD CORPORATION 7219 5875 BERKELEY GROUP HLDGS 9191 7089 BLACKROCK HIGH YIELD BOND PORT 538428 555870 BNP PARIBAS SPONS ADR 11384 12065 BP PLC SPONSORED ADR 29994 25185 BRITISH AMERICAN TOBACCO PLC 12265 13220 CANADIAN NATURAL RESOURCES LTD 17506 16454 CANADIAN PACIFIC RAILWAY LTD 60687 56449 CAPITAL ONE FINANCIAL CORP 28630 34772 CARREFOUR S.A 11923 8799 CHECK POINT SOFTWARE TECHNOLOG 9189 9708 COMMERCE BANCSHARES, INC 11392 12150 COMPAGNIE DE SAINT G 19633 20927 COMPASS GROUP PLC ADR 23634 28686 CONSTELLATION BRANDS INC 17622 16133 CORTEVA INC 25749 31898 COTERRA ENERGY INC 16572 21377 COUPANG ORD SHS CL A 24075 24002 CULLEN FROST BANKERS INC 16121 19064 DANAHER CORP 26520 22266 DEUTSCHE TELE AG ADS 13407 18626 DFA EMERGING MARKETS CORE EQ P 309325 339535 DIAGEO PLC ADS 27493 22502 DIMENSIONAL U S SMALL CAP ETF 346736 412282 DOUBLELINE CORE FIXED INCOME I 901798 895433 DR ING H C F PORSCHE AG ADR 4092 3707 ECOLAB INC 22358 24838 ENEL SOCIETA PER AZI 15484 23371 EQUITY LIFESTYLE PRP 18715 17249 EXPERIAN GROUP LTD S/ADR 14101 15725 FANUC LIMITED UNSPONSORED 24113 21920 FERGUSON PLC 15281 17704 FERRARI NV 20437 36961 FLEXSHARES CREDIT-SCORED US CO 529609 527371 FLEXSHARES GLOBAL QUALITY REAL 405348 425949 FLEXSHARES GLOBAL UPSTREAM NAT 452535 411486 FLEXSHARES MORNINGSTAR US MARK 986231 1189697 FLEXSHARES STOXX GLOBAL BROAD 401193 378205 FUJITSU LTD ADR OTC 16471 18192 GEN DYNAMICS CP 15641 19762 GROUPE DANONE ADS 8635 10658 GSK PLC 24187 22254 HEIDELBERGCEMENT AG UNSPONSORE 5478 5300 HEINEKEN N V S ADR 14490 12029 HONEYWELL INTL 23626 24170 ICICI BK LTD ADS 17374 22783 ICON PLC - AMERICAN DEPOSITARY 34463 29779 INFINEON TECH ADS 23896 21566 ING GROUP N V SPONSORED ADR 11036 12646 JULIUS BAER GROUP LTD 8234 9683 KERING UNSPON ADR EA REPR 0.1 57875 39704 KINGFISHER PLC 9773 9910 KONINKLIJKE PHILIPS ELECTRONIC 16134 21952 L'AIR LIQUIDE ADR OTC 5927 5354 LEGAL & GENERAL GROUP 9881 10013 LENNAR CORP 25684 31638 LI NING CO 2886 3057 LINDE PLC COM 19650 23864 LOWES COMPANIES INC 19851 23693 MARTIN MARIETTA MATLS INC 20767 27375 MEDTRONIC PLC 21564 14858 MEITUAN DIANPING UNSPONSORED A 30825 25731 MERCADOLIBRE, INC 15136 17004 MERCK & CO INC 22242 20592 MICHELIN CIE GEN UNSP/ADR 19991 17210 MICROCHIP TECHNOLOGY INC 24017 17549 MICROSOFT CORP 31444 40886 MITSUBISHI HEAVY INDUSTRIES LT 26542 30722 MITSUBISHI UFJ FINANCIAL GROUP 11095 20346 MONDAY.COM LTD 19319 20719 MURATA MFG INC UNSP/ADR 11596 9820 NATWEST GROUP ADR REPRESENTING 2668 4393 NINTENDO CO LTD ADR UNSPON 13907 15362 NORTHEAST UTIL 18142 16514 NORTHERN EMERGING MARKETS EQUI 217745 221726 NORTHERN FUNDS MID CAP INDEX 453672 447872 NORTHERN HIGH YIELD FIXED INCO 730550 766511 NOVO NORDISK A S 29123 40515 NUVEEN PREFERRED SECURITIES FU 108872 112047 OSHKOSH CORP 15902 13500 PARKER HANNIFIN CP 26525 49610 PNC FINANCIAL GROUP INC 22023 23335 PROCTER GAMBLE CO 18723 21962 PRUDENTIAL PLC SC 29177 22045 QUALCOMM INC 21882 23504 RECKITT BENCKISER GROUP 41220 35940 RELX PLC 8048 11764 RENESAS ELECTRONICS CORP 36427 28032 ROCHE HOLDING LTD ADR 28648 26020 ROLLS ROYCE GRP PLC S/ADR 41801 70965 RPM INTERNATIONAL INC 17607 25227 RWE AKTIENGESELLSCHAF 6049 4979 SAFRAN SA - UNSPON ADR 33302 38804 SANOFI-AVENTIS SPONSORED ADR 17730 19244 SAP AKTIENGESELL ADS 49217 61553 SCHNEIDER ELEC UNSP/ADR 14028 23132 SEA LTD 26324 40424 SHINHAN FINL GROUP CO LTD 5785 4669 SMC CORPORATION 14365 12558 SMITH & NEPHEW PLC ADR 7943 6981 SMNEY 25194 26516 SMURFIT 4595 5440 SOCIETE GENERLE FRNCE ADR 4620 4678 SODEXHO ALLIANCE SA SP ADR 6718 6469 SONY GROUP CORP 27789 28460 SPOTIFY TECHNOLOGY SA 23841 36685 STANDARD CHARTERED 10033 13248 STERIS PLC 20286 20762 TAIWAN SEMICONDUCTOR MFG CO LT 36111 50557 TAKEDA PHARMACEUTICAL COMPANY 4069 4012 TELEDYNE TECH INC 21613 22742 TENCENT HOLDINGS LIMITED 11915 15209 THE BLACKSTONE GROUP INC CL A 16750 24139 THE COCA-COLA CO 19411 21729 TOTALENERGIES SE 22183 18476 UBS AG 20794 20284 UNICREDIT SPA 7813 18961 UNITED OVRSEAS BK LTD ADR 9551 11895 US BANCORP 18650 26928 VANGUARD TOTAL STOCK MARKET ET 894713 1163586 VERIZON COMMUNICATIONS 22885 20715 WASTE CONNECTIONS 12676 15614 XCEL ENERGY INC 21956 21876 XYLEM INC 22280 21116 Administrative Fees 33826 33826 Bank Charges 403 403 State or Local Filing Fees 200 200 Federal Tax Refund 3537 RETURNED GRANT 10000 Investment Management Services 48082 48082 990-PF Estimated Tax for 2024 2900