2024-10-17T22:07:02-05:00 2023-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2023-01-01 861199543 Costolo Family Foundation % Foundation Source COST 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 lorin costello president 8008391754 2024-10-12 true true Jeffrey D Haskell P01345770 8008391754 2023 2024-10-15 13:58:12Z X 10639018 X 1320568 15749 15749 261079 261079 16947 4011272 0 1614343 276828 0 49204 49204 8200 30468 636 29832 87872 49840 29832 270000 270000 357872 49840 299832 1256471 226988 572729 437791 437791 298230 296203 298465 7868991 9262427 9902762 8739950 9996421 10639018 0 0 X 8739950 9996421 8739950 9996421 8739950 9996421 8739950 1256471 9996421 9996421 Publicly-traded Securities 4011272 4563813 -552541 -552541 -552541 3155 3155 3155 9892 0 9892 X 0 6737 3200 3537 false false false false false false false true true CA true false false false false true Foundation Source 8008391754 55 WALLS DRIVE FL 3 Fairfield CT 06824 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 8771108 384545 0 9155653 0 9155653 137335 9018318 450916 450916 3155 3155 447761 447761 447761 299832 0 0 0 0 299832 447761 280798 2021 2020 2019 299832 280798 19034 0 0 428727 0 0 Lorin Costolo Richard Costolo X CONSERVATION INTERNATIONAL FOUNDATION 2011 CRYSTAL DRIVE STE 600 ARLINGTON VA 22202 N/A PC General & Unrestricted 100000 PACIFIC WILD ALLIANCE 1567 HIGHLANDS DR NE 110-373 ISSAQUAH WA 98029 N/A PC General & Unrestricted 50000 RETETI ELEPHANT PROJECT INC 609 GREENWICH ST FL 4 NEW YORK NY 10014 N/A PC General & Unrestricted 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 270000 14 15749 14 261079 18 16947 293775 293775 false false false false false false false false false false X X 1 91063 LLC C/O R COSTOLO 659 CHAPMAN DRIVE Corte Madera CA 949251514 337704 X 2 Costolo Richard 970 W Broadway Suite E PMB 472 Jackson WY 83001 982864 X 1 ROBLOX ORD SHS CLASS A RBLX, 6378 sh. 244055 2023-06-08 1 Confluent, Inc CFLT, 2587 sh. 93649 2023-06-09 2 ROBLOX ORD SHS CLASS A RBLX, 11281 sh. 416071 2023-11-21 2 ROBLOX ORD SHS CLASS A RBLX, 12756 sh. 566793 2023-12-20 ACCENTURE PLC 23330 26669 ADOBE SYSTEMS, INC 41520 43552 ADVANTEST CORP - ADR 18977 17044 ADYEN N.V. 37724 30113 AENA SME S.A. ADR 8900 14480 AKZO NOBEL NV-ADR 16958 23357 ALCON INC 23157 23670 ALLIANZ SE 15044 17562 ALSTOM 22569 18346 AMADEUS IT HLDS SA 6758 9731 AMERIPRISE FINANCIAL INC 22493 34185 AMGEN INC 24749 30530 ANHEUSER BUSCH COS INC 14783 17900 ANSYS INC 31836 32659 AON PLC CL A 23634 25319 ARCH CAPITAL GROUP LTD 19645 21093 ASM INTERNATIONAL NV 15346 24402 ASML HOLDING NV NY REG SHS 27070 31791 ASSA ABLOY UNSP/ADR 4423 6025 ASTRAZENECA 40666 42835 ATLAS COPCO AB A SHS ADR 15158 17606 ATLASSIAN CORP CL A 35371 35203 ATMOS ENERGY CORP 24606 25034 AUTODESK, INC 23668 29705 AXA ADS 12086 15525 BAE SYSTEMS PLC 23366 25960 BANCO BRADESCO S.A. SPONS ADR 5371 6853 BARCLAYS PLC ADR 22064 26020 BAYER A G SPONSORED ADR 9924 6304 BLACKROCK HIGH YIELD BOND PORT 531969 545826 BNP PARIBAS SPONS ADR 4863 6566 BP PLC SPONSORED ADR 25048 25700 BRITISH AMERICAN TOBACCO PLC 15976 13503 CANADIAN NATURAL RESOURCES LTD 15820 15921 CANADIAN PACIFIC RAILWAY LTD 52966 55105 CAPITAL ONE FINANCIAL CORP 31782 29109 CARREFOUR S.A 11468 11149 COMMERCE BANCSHARES, INC 15395 13067 COMPAGNIE FINANCIERE RICHEMONT 7928 9229 COMPASS GROUP PLC ADR 25438 26976 CONSTELLATION BRANDS INC 20475 20549 CORTEVA INC 30262 31627 COTERRA ENERGY INC 17058 23555 CRODA INTL 3498 4093 CROWN CASTLE INTL 27329 17509 CULLEN FROST BANKERS INC 19412 18660 DANAHER CORP 31025 27761 DEUTSCHE TELE AG ADS 19785 23720 DFA EMERGING MARKETS CORE EQ P 199154 218389 DIAGEO PLC ADS 22826 19810 DIMENSIONAL U S SMALL CAP ETF 286974 315926 DOUBLELINE CORE FIXED INCOME I 1465734 1472649 ECOLAB INC 26934 24794 ENEL SOCIETA PER AZI 15107 26585 EPAM SYSTEMS INC 20559 13083 EQUITY LIFESTYLE PRP 20296 20174 EVOLUTION GAMING GROUP AB ADR 29017 23643 EXPERIAN GROUP LTD S/ADR 21683 23140 FANUC LIMITED UNSPONSORED 18882 19224 FERGUSON PLC 19697 26644 FERRARI NV 23191 37904 FLEXSHARES GLOBAL QUALITY REAL 212195 240241 FLEXSHARES GLOBAL UPSTREAM NAT 597927 629115 FLEXSHARES MORNINGSTAR US MARK 536160 583923 GEN DYNAMICS CP 16885 22591 GROUPE DANONE ADS 16975 22442 GSK PLC 20412 20383 HONEYWELL INTL 27651 25794 IBERDROLA ADR 9160 10710 ICICI BK LTD ADS 19507 21098 ICON PLC - AMERICAN DEPOSITARY 30770 37082 INFINEON TECH ADS 4819 5441 ING GROUP N V SPONSORED ADR 10531 16086 INVESCO OPPENHEIMER DEVELOPING 203301 209877 ISHARES S&P GLOBAL I 89853 99087 KERING UNSPON ADR EA REPR 0.1 19266 16900 KINGFISHER PLC 3697 4076 KONINKLIJKE PHILIPS ELECTRONIC 14481 21464 L'AIR LIQUIDE ADR OTC 7177 11763 L'OREAL ADR 20137 21572 LEGAL & GENERAL GROUP 9575 10978 LENNAR CORP 25945 38005 LINDE PLC COM 16864 20946 LOWES COMPANIES INC 22316 24035 LVMH MOET HENN UNSP 19795 22256 MARTIN MARIETTA MATLS INC 26494 36919 MEDTRONIC PLC 24071 15982 MERCADOLIBRE, INC 31448 34574 MERCK & CO INC 27405 28018 MICHELIN CIE GEN UNSP/ADR 23720 22360 MICROCHIP TECHNOLOGY INC 27688 32645 MICROSOFT CORP 39367 50013 MITSUBISHI UFJ FINANCIAL GROUP 11286 17039 MURATA MFG INC UNSP/ADR 18132 22166 NATWEST GROUP ADR REPRESENTING 6923 6463 NESTLE S.A 21223 20813 NORTHERN FUNDS MID CAP INDEX 105302 104309 NORTHERN HIGH YIELD FIXED INCO 599999 627225 NORTHERN MULTI MANAGER GLOBAL 187800 216952 NOVARTIS AG ADR 11490 14237 NOVO NORDISK A S 23645 45415 OSHKOSH CORP 20276 19514 PARKER HANNIFIN CP 27477 40542 PHILLIPS 66 5993 11583 PNC FINANCIAL GROUP INC 25007 21214 PROCTER GAMBLE CO 22707 23739 PRUDENTIAL PLC SC 22821 22899 QUALCOMM INC 28657 29938 RECKITT BENCKISER GROUP 29417 26285 RELX PLC 12296 16300 RIO TINTO PLC SPONSORED ADR 4024 4989 ROBLOX ORD SHS CLASS A 534844 550332 ROCHE HOLDING LTD ADR 31918 27136 ROLLS ROYCE GRP PLC S/ADR 10578 46316 ROYAL DUTCH SHELL CL A (OLD) 21067 22438 RPM INTERNATIONAL INC 21093 27573 RWE AKTIENGESELLSCHAF 12627 15175 RYANAIR HOLDINGS PLC-ADR COM 8241 13336 SAFRAN SA - UNSPON ADR 23725 23918 SANDVIK AB SPONS ADR 1211 1561 SANOFI-AVENTIS SPONSORED ADR 12940 15068 SAP AKTIENGESELL ADS 12572 21179 SCHNEIDER ELEC UNSP/ADR 12522 17460 SEVEN & I HOLDINGS C 9945 10277 SONY GROUP CORP 31982 28312 SPDR S&P MIDCAP 400 EFT TRUST 292838 307980 STERIS PLC 18952 21106 SUMITOMO MITSUI FINCL GRP 4445 6069 SYSCO CORP 23960 20988 TAKEDA PHARMACEUTICAL COMPANY 12348 13357 TELEDYNE TECH INC 11500 11604 TENCENT HOLDINGS LIMITED 8762 7558 THE BLACKSTONE GROUP INC CL A 25427 27624 THE COCA-COLA CO 22127 24220 THOMSON REUTERS CORPORATION 13969 17985 UBS AG 21347 23299 UNICREDIT SPA 10368 24080 UNILEVER PLC AMER 8246 9163 UNITED OVRSEAS BK LTD ADR 10048 10214 US BANCORP 19909 27353 VALEO SA SPONS ADR 5870 5302 VANGUARD TOTAL STOCK MARKET ET 894713 952438 VERALTO CORPORATION 3904 3126 VINCI SA ADR 9720 11733 WASTE CONNECTIONS 16922 18659 XCEL ENERGY INC 26693 24145 XYLEM INC 26280 25617 296203 298465 Administrative Fees 29780 29780 Bank Charges 636 636 Postage/Delivery Service 27 27 State or Local Filing Fees 25 25 Investment Management Services 49204 49204 990-PF Estimated Tax for 2023 8200