2025-11-05T14:45:28-08:00 2024-12-31 371420474 Fontanello Duffield & Otake LLP 111 Pine Street Suite 1750 San Francisco CA 94111 990PF 2024-01-01 852286751 KahleAustin Family Foundation KAHL 2074155714 319 Main Street Biddeford ME 04005 Brewster Kahle Chairman 2025-11-05 true true Erik Satow P01410341 4159830200 2024 2025-03-06 01:10:19Z X 118678612 X 100191146 1512512 1512512 1074140 79218620 75668969 139021 102916819 77181481 8520 8520 276238 276238 3841 2025 1816 288599 278263 10336 20000000 20000000 20288599 278263 20010336 82628220 76903218 7774 93990 93990 876003 2207000 2207000 30 120 30 30 5756581 112663283 112663283 8710556 790400 3714309 3714309 5125716 21267150 118678612 118678612 4663 780 4663 780 X 21262487 118677832 21262487 118677832 21267150 118678612 21262487 82628220 14787125 118677832 118677832 Sales of Publicly Traded Securities D 2000-01-01 2024-12-31 79218620 3549651 75668969 75668969 75668969 1068955 1068955 1068955 1320597 15000 1335597 266642 266642 false false false false false false false false true DE true false false false true true N/A Peter Montano 2074155714 319 Main Street Biddeford ME 04005 false false false false false false false false false false false false false false false false false false false false false false Brewster Kahle 319 Main Street Biddeford ME 94129 Chairman 2.00 0 Mary K Austin 319 Main Street Biddeford ME 04005 Director 2.00 0 Caslon Kahle 319 Main Street Biddeford ME 04005 Director 1.00 0 Logan Kahle 319 Main Street Biddeford ME 04005 Director 1.00 0 NONE Morgan Stanley 555 California Street 14th Fl San Francisco CA 94104 Investment Management 276238 61944862 12146712 0 74091574 0 74091574 1111374 72980200 3649010 3649010 1068955 1068955 2580055 2580055 2580055 20010336 20010336 2580055 639806 68247 119188 827241 20010336 0 2580055 17430281 18257522 0 18257522 639806 68247 119188 17430281 Brewster Kahle Mary K Austin X Fidelity Charitable PO Box 770001 Cincinnati OH 45277 N/A PC General Support 2000000 San Francisco Foundation 1 Embarcadero Ctr San Francisco CA 94111 N/A PC General Support 1000000 Open Library of Canada 40 King Street West Suite 5800 Toronto Ontario CA M5H 3S1 N/A PC General Support 6000000 Morgan Stanley GIFT DAF 2000 Westchester Avenue Purchase NY 10577 N/A PC General Support 11000000 20000000 14 1512512 1074140 Refunds 138947 Return of Capital 14 74 1512586 1213087 2725673 11a Refund of taxes paid. false false false false false false false false false false X X 1 Kahle Austin Revocable Trust 513B Simonds Loop San Francisco CA 94129 100191146 X 1 346710 Sh AMZ 100191146 2024-01-01 Xilinx Inc, 2.95% 6/1/24 JPMorgan Chase 3.875% 9/10/24 Estee Lauder 2.0% 12/1/24 American Express 3.625% 12/5/24 Accrued Interest 3714309 3714309 112663283 112663283 Legal Fees 8520 0 0 8520 Bank Fees 25 25 Electric Avenue Island 2000 2000 Office Expense 701 701 Other Business Expenses 1115 1115 Refunds 138947 Return of Capital 74 Investment Management Fees 276238 276238 0 0