Person · officer / director

Tom Van Loben Sels

Secretary · Additional Ventures Foundation

Secretary at Additional Ventures Foundation. Listed as an officer, director, or key employee across 13 organizations on the Form 990 record.

This is me

Ambiguous identity This name matches 2 other individuals we could not verify as the same person. Each is kept as a separate record below — treat them as distinct people unless an explicit match is confirmed.

Organizations

Roles reported

Others who share this name

Who this is

Profile

Everything on the left is verified from the IRS filings. The biography on the right is compiled from public web sources and grounded to that filed record.

✓ Verified from filings

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Reported as Secretary of Additional Ventures Foundation, based in San Francisco, CA.

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Also listed as Treasurer of Coefficient Giving Reserch, uncompensated.

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Also listed as CFO/Co-Secretary of Preston-Werner Foundation, uncompensated.

Facts extracted directly from each organization's Form 990, Part VII.

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Affiliations

Organizations

Linked as the same person by IRS Schedule R, a shared officer mailing address, or shared fellow board members.

Reffkin Foundation Asst Secretary/Asst Treasurer · Palo Alto, CAFiled FY2025, FY2024, FY2023 · Source: Form 990, Part VII

Parker Institute for Cancer Immunotherapy Treasurer & Director · $180.1M revenue · San Francisco, CATHE PARKER INSTITUTE FOR CANCER IMMUNOTHERAPY'S (PICI) MISSION IS TO DEVELOP AND ACCELERATE ACCESS TO BREAKTHROUGH CANCER THERAPIES, CURATING…Filed FY2025, FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII

Additional Ventures Foundation Secretary · $29.1M revenue · San Francisco, CAFiled FY2024 · Source: Form 990, Part VII

Coefficient Giving Reserch Treasurer · $1.8M revenue · Palo Alto, CATO STUDY AND ENGAGE IN RESEARCH TO IMPROVE THE EFFECTIVENESS AND IMPACT OF PHILANTHROPIC GIVINGFiled FY2024, FY2023, FY2022, FY2021 · Source: Form 990, Part VII

Preston-Werner Foundation CFO/Co-Secretary · $4.6M revenue · Palo Alto, CAFiled FY2024 · Source: Form 990, Part VII

Breyer Family Foundation Secretary · $6.3M revenue · Palo Alto, CAFiled FY2024, FY2023, FY2021 · Source: Form 990, Part VII

Coefficient Giving Advisors INC Treasurer · $100.9M revenue · Palo Alto, CASUPPORT VARIOUS CHARITABLE CAUSE AREAS TO HELP OTHERS AND OUR WORLD WITH THE RESOURCES AVAILABLEFiled FY2024 · Source: Form 990, Part VII

Siriwan Singhasiri and Kenneth Lin Foundation Assistant Secretary · $32.7M revenue · Palo Alto, CAFiled FY2024, FY2023, FY2021 · Source: Form 990, Part VII

Sean N Parker Foundation Secretary/Treasurer/Director · $197K revenue · Palo Alto, CAFiled FY2024, FY2021 · Source: Form 990, Part VII

Kevin and Nicole Systrom Foundation Assistant Secretary · $13.4M revenue · Palo Alto, CAFiled FY2024, FY2021 · Source: Form 990, Part VII

Coefficient Giving Action Fund Treasurer · $83.2M revenue · Palo Alto, CASTUDY AND PROMOTE MORE EFFECTIVE GIVING FOR PUBLIC POLICY, ADVOCACY AND SOCIAL WELFARE PURPOSESFiled FY2024, FY2023, FY2022, FY2021, FY2020 · Source: Form 990, Part VII

128 Collective Intitiatives INC Treasurer/Co-Secretary/Director · $49K revenue · Palo Alto, CAPROMOTE VOTER REGISTRATION, POLITICAL PARTICIPATION, AND CIVIC INVOLVEMENTFiled FY2024 · Source: Form 990, Part VII

Good Ventures Foundation Assistant Secretary · $2.6B revenue · Palo Alto, CAFiled FY2024, FY2023, FY2022 · Source: Form 990, Part VII

Disambiguation

Other people named Tom Van Loben Sels

Different individuals who share this name, separated by IRS Schedule R, mailing address, and shared-board evidence. The 990 carries no person identifier, so some may still be the same person.

Tom Van Loben Sels 2 organizations · Chicago, ILPacific Atlantic Action Coalition

Tom Van Loben Sels 1 organization · Palo Alto, CA100 Dollar Hats

Network

Serves alongside

Other officers, directors & key employees at this person's organizations, by latest reported compensation.

Tarak Mody

Chief Business Off. Thru 8/25 · FY2025

$792K

Ute Dugan MD

Chief Med. Officer Thru 6/24 · FY2024

$715K

John Connolly PhD

Chief Scientific Officer · FY2025

$703K

Karen E Knudsen Costello

CEO As of 03/2025 · FY2025

$655K

Kevin Marks

Chief Legal Officer · FY2025

$623K

Theresa Lavalle

VP Translational Medicine & Re · FY2021

$566K

Justin Fairchild

VP Clinical Dev. Thru 9/30/22 · FY2022

$535K

Lisa Butterfield

VP Res. & Dev. Thru 7/31/22 · FY2022

$525K

Melinda Griffith

Chief Legal Counsel · FY2021

$520K

Theresa Lavallee PhD

VP-Translational Medicine · FY2020

$454K

Sara Coblin

Sr VP Finance & Admin. · FY2025

$445K

Shane Corcoran

Senior VP, Strat. Ops. & Comms · FY2025

$442K

Network

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