2024-09-26T07:55:06-05:00 2023-12-31 Foundation Source 3333 New Hyde Park Rd Ste 406 New Hyde Park NY 11042 990PF 2023-01-01 061331577 The Mayer-Phillips Foundation Inc % Foundation Source MAYE 8008391754 Foundation Source 501 Silverside Rd Wilmington DE 198091377 allessandra mayer vice president 8008391754 2024-09-23 true true Jeffrey D Haskell P01345770 8008391754 2023 2024-08-08 14:25:15Z X 10833712 X 276993 3342 3342 199575 199575 172387 2092163 397334 652297 600251 35000 35000 3102 3102 18896 18896 10200 48130 48130 115328 18896 86232 400000 400000 515328 18896 486232 136969 581355 46946 131851 131851 6503774 6289048 8668259 1518835 1785625 2033602 8069555 8206524 10833712 0 0 X 8069555 8206524 8069555 8206524 8069555 8206524 8069555 136969 8206524 8206524 Publicly-traded Securities 2092163 1694829 397334 397334 397334 8081 8081 8081 8872 0 8872 X 0 791 791 false false false false false false false true true CT true false false false false true Foundation Source 8008391754 501 Silverside Road Suite 123 Wilmington DE 198091377 false false false false true false false false false false false false false false false false false false false false false false Alessandra Mayer Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, VP 12.0 35000 425 0 Barbara P Mayer Foundation Source 501 Silverside Rd Wilmington DE 198091377 Pres, Dir 1.0 0 0 0 Christa A Mayer Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir 1.0 0 0 0 John A Mayer Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, Sec 1.0 0 0 0 Timothy P Mayer Foundation Source 501 Silverside Rd Wilmington DE 198091377 Dir, Treas 1.0 0 0 0 8284174 70388 2033602 10388164 0 10388164 155822 10232342 511617 511617 8081 8081 503536 503536 503536 486232 0 0 0 0 486232 503536 417844 2021 2020 2019 486232 417844 68388 0 0 435148 0 0 Barbara P Mayer John A Mayer X 5280 HIGH SCHOOL 1200 W MISSISSIPPI AVE DENVER CO 80223 N/A PC General & Unrestricted 50000 ACTIVATE WORK INC 1700 LINCOLN ST 17TH FL DENVER CO 80203 N/A PC General & Unrestricted 50000 ARRUPE JESUIT HIGH SCHOOL 4343 UTICA ST DENVER CO 80212 N/A PC Corporate Work Study Program 25000 BE THE CHANGE PROGRAM INC PO BOX 1938 COMMERCE CITY CO 80037 N/A PC General & Unrestricted 20000 CAPITAL SISTERS INTERNATIONAL INC 601 16TH ST C310 GOLDEN CO 80401 N/A PC General & Unrestricted 1000 CAREERWISE COLORADO 400 S COLORADO BLVD STE 400 DENVER CO 80246 N/A PC General & Unrestricted 50000 CHALLENGE FOUNDATION INC 4545 S UNIVERSITY BLVD ENGLEWOOD CO 80113 N/A PC General & Unrestricted 5000 FOREST HEIGHTS LODGE INC 13922 DENVER W PARKWAYSUITE 150 GOLDEN CO 80401 N/A PC General & Unrestricted 500 FULLCIRCLE PROGRAM INC 1955 W BASELINE RD STE 113-431 MESA AZ 85202 N/A PC General & Unrestricted 4250 FULLCIRCLE PROGRAM INC 1955 W BASELINE RD STE 113-431 MESA AZ 85202 N/A PC Boulder Program 10000 JUNIOR ACHIEVEMENT USA 6500 GREENWOOD PLZ BLVD GREENWOOD VILLAGE CO 80111 N/A PC General & Unrestricted 25000 MEDICINE HORSE PROGRAM PO BOX 17068 BOULDER CO 80308 N/A PC General & Unrestricted 5000 MINDSPARK LEARNING 455 S PIERCE ST LAKEWOOD CO 80226 N/A PC Fall 2023 Education Accelerator in Grand Junction 25000 ONE WORLD CHILDRENS FUND 3108 GLENDALE BLVD 506 LOS ANGELES CA 90039 N/A PC Empowering Youth in Cambodia 3000 ONE WORLD CHILDRENS FUND 3108 GLENDALE BLVD 506 LOS ANGELES CA 90039 N/A PC General & Unrestricted 250 SCHOOLHOUSE WORLD INC 3790 EL CAMINO REAL UNIT 544 PALO ALTO CA 94306 N/A PC General & Unrestricted 75000 ST VRAIN VALLEY SCHOOL DISTRICT 395 SOUTH PRATT PKWY LONGMONT CO 80501 N/A PC General & Unrestricted 50000 WOMEN'S FOUNDATION OF COLORADO INC 1901 E ASBURY AVE 3RD FL DENVER CO 80208 N/A PC General & Unrestricted 1000 400000 14 3342 14 199575 18 172387 375304 375304 false false false false false false false false false false X X 1 Mayer Barbara P 1074 s Gilpin Street Denver CO 80209 44921 X 2 Mayer John A 1074 S Gilpin Street Denver CO 80209 232072 X 1 LVMH MOET HENN UNSP LVMUY, 247 sh. 44921 2023-06-13 2 DAIICHI SANKYO CO LTD SPONSORED ADR LEV DSNKY, 510 sh. 19013 2023-06-13 2 LVMH MOET HENN UNSP LVMUY, 361 sh. 65653 2023-06-13 2 NOVO NORDISK A S NVO, 422 sh. 66959 2023-06-13 2 NOVO NORDISK A S NVO, 190 sh. 30147 2023-06-13 2 APPLE INC AAPL, 264 sh. 50300 2023-11-29 BLACKROCK HIGH YIELD BOND PORT 74111 76326 FIDELITY 500 INDEX FUND 543567 582281 GLOBAL IMPACT FUND II CLASS A 31352 29210 ISHARES CORE MSCI EAFE ETF 143594 158710 ISHARES TRUST MSCI EAFE INDEX 339527 438236 JPMORGAN BETA BUILDERS EUROPE 628196 639580 JPMORGAN BETABUILDERS CANADA E 157056 208454 JPMORGAN BETABUILDERS DEVELOPE 171295 156155 JPMORGAN BETABUILDERS JAPAN ET 188662 191856 JPMORGAN INTREPID MID CAP FUND 236240 252089 PRUDENTIAL HIGH YIELD FUND CLA 82088 81959 SPDR S&P 500 ETF TRUST 1752615 4084339 TEXAS PACIFIC LAND CORPORATION 100856 59753 VANGUARD INTERMEDIATE TERM COR 229496 237094 VANGUARD MORTGAGE-BACKED SEC I 91397 80017 VANGUARD TOT INTL BOND IX ADMI 568327 495868 VANGUARD TOTAL BOND MARKET ETF 388391 357600 VANGUARD TOTAL BOND MARKET IND 125438 114687 VANGUARD TOTAL INTL BD IDX ETF 436840 424045 ASF VIII INFRA PRIV INVESTORS 131930 145178 GENERAL ATLANTIC INVST PARTNER 324827 375512 HPS CORE SR LENDING OFFSHORE F 137434 174150 MILLENNIUM PRIVATE INVESTORS O 264963 290460 NEA 18 PRIVATE INVESTORS OFFSH 177074 167813 ORBIMED ROYALTIES III PRVTE IN 131134 189308 PEG GLOBAL PRIVATE EQUITY VIII 291790 431321 PEG GLOBAL PRIVATE EQUITY X S. 76473 88654 RTW OFFSHORE FUND ONE, LTD 250000 171206 Administrative Fees 47190 47190 Foundation Dues & Memberships 890 890 State or Local Filing Fees 50 50 Investment Management Services 18896 18896 990-PF Estimated Tax for 2023 8600 990-PF Extension for 2022 1600