2026-04-30T07:43:47-05:00 2025-12-31 010494526 Baker Newman & Noyes PO Box 507 Portland ME 04112 990PF 2025-01-01 823764421 Probalistic Computing Foundation Inc PROB 6179998654 245 Main Street Floor 2 Cambridge MA 02142 Philip Butler President 6179998654 2026-04-02 1 Connor Smart P02285543 2078792100 2026-04-02 2025 2025-03-06 01:10:19Z X X 20783802 X 0 X 729533 729533 0 729533 729533 0 0 0 78662 0 78662 6582 0 6582 52555 0 52555 20279 0 20279 717758 2537 715221 15882 0 0 14640 0 14640 47519 0 47519 184426 4181 180245 1138303 6718 1115703 10850000 10850000 11988303 6718 11965703 -11258770 722815 751099 373056 373056 24102632 20410546 20410546 200 200 200 24853931 20783802 20783802 0 0 X 24853931 20783802 0 0 0 0 24853931 20783802 24853931 20783802 24853931 -11258770 7188641 20783802 0 20783802 10047 0 10047 0 10047 8400 0 0 0 8400 0 1647 0 0 0 0 0 0 0 1 0 0 1 1 DE MA 1 0 0 0 0 1 N/A Supporting Strategies co L Smith 6179998654 245 Main Street Floor 2 Cambridge MA 02142 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Vikash Mansignhka 245 Main Street Floor 2 Cambridge MA 02142 Director 1.00 0 0 0 Adam Marblestone 245 Main Street Floor 2 Cambridge MA 02142 Director 1.00 0 0 0 Sara Rendortorff-Smith 245 Main Street Floor 2 Cambridge MA 02142 Director (end 2025) 1.00 0 0 0 Santiago Suarez 245 Main Street Floor 2 Cambridge MA 02142 Director 1.00 0 0 0 Josh Tenebaum 245 Main Street Floor 2 Cambridge MA 02142 Director 1.00 0 0 0 Philip Butler 245 Main Street Floor 2 Cambridge MA 02142 President, Secretary, Treasurer 1.00 0 0 0 NONE 0 TriNet One Park Place Suite 600 Dublin CA 94568 Contract labor solutions 342228 Safeguard 108 Wild Basin Road South 370 Austin TX 78746 Contract labor solutions 161823 JSK Management PO Box 17 Keene NH 03431 Research services 80000 Deel 425 First Street San Francisco CA 94105 Contract labor solutions 59421 Mill Law Center 3415 S Sepulveda Boulevard Los Angeles CA 90034 Legal services 52205 0 PCF sponsors and coordinates research and open-sourced software development with an aim towards the following public benefit goals:1. Prototyping interactive web-based teaching material for financial modeling in probabilistic programming, teaching foundational concepts of probabilistic programming in OpenGen, and querying a large population model in natural language.2. Improving the open-source OpenGen platform to better enable connected learning, interactive exploration, and new modes of AI-assisted pedagogy with probabilistic programs. 1115703 0 0 21741229 0 21741229 0 0 21741229 326118 21415111 1070756 1070756 10047 10047 1060709 0 1060709 0 1060709 11965703 0 11965703 1060709 0 0 633366 633366 11965703 0 0 1060709 1060709 9844285 0 0 11538360 0 0 0 0 0 10000000 0 1538360 633366 904994 X Convergent Research 160 Alewife Brook Parkway 1212 Cambridge MA 02138 N/A PC Data and computer sciences; research 9500000 ETH Zurich Foundation USA Inc 100 Wall Street Fl 10 New York NY 10005 N/A PC Data and computer sciences; research 300000 Massachusetts Institute of Technology 600 Memorial Drive W98-300 Cambridge MA 02139 N/A PC Data and computer sciences; research 650000 Roy Institute for the Advancement of Learning McGill University 845 Sherbrooke Street West Montreal Quebec CA H3A 0G4 N/A PC Data and computer sciences; research 300000 Science and Technology Futures 160 Alewife Brook Parkway 1218 Cambridge MA 02138 N/A PC Data and computer sciences; research 100000 10850000 0 14 729533 0 729533 0 729533 0 0 0 0 0 0 0 0 0 0 Bookkeeping fees 20279 0 20279 In accordance with 53.4942-(a)-3(c)(2), I, Philip Butler, duly appointed director of the Probabilistic Computing Foundation, in my capacity as such, do hereby elect to treat $10,000,000 as a distribution out of corpus on the Foundation's 2025 tax return for the year ending December 31, 2025, allowing the contributor's donation of $10,000,000 received during the 2024 tax year to qualify under 170(b)(1)(F)(ii). See the attached footnotes included with this tax return for additional information. Form 990-PF, Page 9, Part XII, Line 7: Election Under Regulations Section 53.4942(a)-3(d)(2) to Treat Excess Qualifying Distributions as Distributions out of Corpus (continued):In accordance with 53.4942-(a)-3(c)(2), an authorized individual of the Foundation has elected to treat certain amounts as distributions out of corpus on this 2025 Form 990-PF for the year ending December 31, 2025. During this tax year ending December 31, 2024, the Foundation received contributions of $10,000,000. The Foundation made qualifying distributions out of corpus equal to 100% of this amount ($10,000,000) during the year ending December 31, 2025. Accordingly, the Foundation made qualifying distributions out of corpus equal in value to 100% of the value of contributions received during this tax year within the allowable election period. All distributions were made to organized charities that were not controlled directly or indirectly by the Foundation or another private foundation at the time the donations were paid. Furthermore, in compliance with 170(b)(1)(F)(ii), the Foundation distributed the annual required amount of minimum investment return under 4942, $1,060,709, within this current tax year or within 2.5 months after the end of this tax year. Legal fees 52555 0 52555 Saferdata Interest 200 200 200 Office expenses 22948 0 22948 Information technology 84609 0 84609 Insurance 4803 0 4803 Banking fees 4181 4181 0 MA PC state filing fees 1000 0 1000 Accrual-to-cash adjustment (net) 66885 0 66885 Accrual-to-cash adjustment 66885 Acquisition of interest in CHI-FRO LLC 7121756 Tax preparation fees 5073 2537 2536 Contracted labor 712685 0 712685 Excise taxes and penalties 15882 0 0