2025-10-30T12:17:32-05:00 2024-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2024-01-01 853960208 Leder Family Foundation % Foundation Source LEDE 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 Karen Leder Secretary 8008391754 2025-10-23 true true Jeffrey D Haskell P01345770 8008391754 2024 2025-03-06 01:10:19Z X 15235784 X 3000000 1677 1677 310254 310254 121076 2279343 130917 54857 54856 3487864 497704 0 50000 50000 3825 3825 36328 36328 4600 46351 192 46159 141104 36520 99984 975500 975500 1116604 36520 1075484 2371260 461184 0 165912 265956 265956 10932774 13203879 13883457 500581 500692 1086371 11599267 13970527 15235784 0 0 X 11599267 13970527 11599267 13970527 11599267 13970527 11599267 2371260 13970527 13970527 Publicly-traded Securities 2279343 2148426 130917 130917 130917 6410 6410 6410 4663 0 1900 6563 X 7 146 146 false false false false false false false true true DE TX 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 Ethan Leder Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, Pres 5.0 0 0 0 Karen Leder Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, Sec, Treas 5.0 0 0 0 11456329 229992 1086371 12772692 0 12772692 191590 12581102 629055 629055 6410 6410 622645 622645 622645 1075484 0 0 0 0 1075484 622645 574486 887014 1461500 1075484 622645 452839 1914339 0 1914339 574486 887014 452839 Ethan Leder Karen Leder X ANTI-DEFAMATION LEAGUE 605 3RD AVE NEW YORK NY 10158 N/A PC Fund for ADL Concert Against Hate 10000 ANTI-DEFAMATION LEAGUE 605 3RD AVE NEW YORK NY 10158 N/A PC Center on Extremism and General Operating Fund 200000 BREAST CARE FOR WASHINGTON 4 ATLANTIC ST SW WASHINGTON DC 20032 N/A PC General & Unrestricted 2500 CITY KIDS TO WILDERNESS PROJECT INC 2437 15TH ST NW 4TH FL WASHINGTON DC 20009 N/A PC General & Unrestricted 10000 GIVING FOUNDATION FOR WOMEN & CHILDREN INC 8901 IRON GATE CT POTOMAC MD 20854 N/A PC Toy and Coat Drive 2500 GREATER WASHINGTON COMMUNITY FOUNDATION 1325 G ST NW STE 480 WASHINGTON DC 20005 N/A PC General & Unrestricted 150000 HILARITY FOR CHARITY 9301 WILSHIRE BLVD STE 507 BEVERLY HILLS CA 90210 N/A PC Charitable Event 2500 HOUR GENERATION FOUNDATION 9591 BALTIMORE AVE UNIT 1078 COLLEGE PARK MD 20741 N/A PC Charitable Event 25000 MAIN STREET CONNECT INC 50 MONROE PL ROCKVILLE MD 20850 N/A PC General & Unrestricted 5000 SAINT FRANCES ACADEMY 501 E CHASE ST BALTIMORE MD 21202 N/A PC S.T.A.R.S. Mentoring Fund 50000 SHERIFFS MEADOW FOUNDATION PO BOX 1088 VINEYARD HAVEN MA 02568 N/A PC Caroline Tuthill Preserve Fund 5000 THE JEWISH FEDERATION OF GREATER WASHINGTON INC 6101 EXECUTIVE BLVD STE 200 N BETHESDA MD 20852 N/A PC 1229 donor advised fund 500000 UNITED CEREBRAL PALSY OF NEW YORK CITY INC 80 MAIDEN LN FL 8 NEW YORK NY 10038 N/A PC General & Unrestricted 3000 WASHINGTON HEBREW CONGREGATION 3935 MACOMB ST NW WASHINGTON DC 20016 N/A PC General & Unrestricted 10000 975500 14 1677 14 310254 18 121076 K-1 Inc/Loss 14 54857 487864 487864 false false false false false false false false false false X X 1 Leder Ethan 7424 Exeter Road Bethesda MD 20814 3000000 X COMMUNICATION SVCS SLCT SCTR S 296139 366619 CONSUMER DISCRETIONARY SELECT 388353 460366 CONSUMER STAPLES SELECT SECTOR 186285 199984 FINANCIAL SELECT SECTOR SPDR F 491698 590593 INVESCO PREFERRED ETF 169472 169076 INVESCO SENIOR LOAN ETF 217464 216874 ISHARE MSCI EMU INDX 593954 584478 ISHARE MSCI UK INDEX 281308 279777 ISHARES 0-3 MONTH TREASURY 145785 145665 ISHARES 20+ YR TREAS BD 245153 212212 ISHARES BARCLAYS CMBS BOND 382051 385058 ISHARES BARCLAYS MBS BOND FUND 436108 428604 ISHARES BROAD USD HIGH YIELD C 371185 382175 ISHARES BROAD USD INV GRD CORP 853866 852899 ISHARES CORE MSCI EAFE ETF 68466 69156 ISHARES CORE MSCI EMERGING MAR 228706 233528 ISHARES INC MSCI SWITZERLAND I 202728 195376 ISHARES JP MORGAN USD EM MKTS 334982 296592 ISHARES MSCI AUSTRALIA INDEX F 143590 138173 ISHARES MSCI BRAZIL FREE INDEX 76487 55577 ISHARES MSCI CANADA INDEX FD 196227 210527 ISHARES MSCI CHINA INDEX FUND 151870 169024 ISHARES MSCI INDIA ETF 164035 167185 ISHARES MSCI-JAPAN 424026 436217 ISHARES MSCI-SOUTH KOREA 82608 68956 ISHARES MSCI-TAIWAN 118671 123499 MATERIALS SELECT SECTOR SPDR 95873 91713 REAL ESTATE SELECT SECTOR SPDR 79626 78452 SCHWAB US TIPS 258044 256673 SELECT SECTOR SPDR ENERGY FUND 124897 123350 SELECT SECTOR SPDR INDUSTRIAL 316530 351931 SELECT SECTOR SPDR UTILITIES 106068 113989 SELECT SECTOR SPDR-HEALTH CARE 407318 409271 TECHNOLOGY SPDR 1101487 1257932 VANECK VECTOR JPMORGAN EM LOCA 158471 127729 VANGUARD GOVT BOND ETF INTERME 735915 725754 VANGUARD MID-CAP ETF 1032591 1215261 VANGUARD RUSSELL 1000 INDEX FU 719672 830833 VANGUARD RUSSELL 2000 ETF 684408 731881 VANGUARD SHOR-TERM GOV BOND 131762 130498 RATIOTHERAPEUTICS - B 250000 249943 TPG GROWTH V AMPLIFIER LP 2845 250692 836428 Administrative Fees 46134 46134 K-1 Exp TPG GROWTH V AMPLIFIER 192 192 State or Local Filing Fees 25 25 K-1 Inc/Loss TPG GROWTH V AMPLIFIER LP 2845 54857 54856 Investment Management Services 36328 36328 990-PF Estimated Tax for 2024 4500 990-PF Extension for 2023 100