2024-08-26T08:02:24-07:00 2023-11-30 364262960 RICHARD A MASON CPA 3828 JOANNE DR GLENVIEW IL 60026 990PF 2022-12-01 364118927 The Cynthia Elkins Foundation CYNT 3123648725 415 E North Water St Unit 2406 Chicago IL 60611 Stephen Elkins President 2024-08-26 true true Richard A Mason P00164473 8475098088 X 2022 2024-08-08 14:25:15Z X 629084 X 779080 3165 3165 -13571 609647 768674 3165 4100 1131 5353 10584 0 0 682000 682000 692584 0 682000 76090 3165 306821 320997 613189 20167 15895 15895 326988 336892 629084 0 X 326988 336892 326988 336892 326988 336892 326988 76090 403078 66186 336892 AIRBNB INC P 2023-01-20 2023-06-01 10643 9629 1014 1014 ALPHABET INC P 2023-01-20 2023-01-30 19131 19348 -217 -217 AMAZON.COM INC. 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