Who is Robert Weisskoff?

Senior Partner at F-Prime Capital Partners

Where does Robert Weisskoff work?

Robert Weisskoff is Partner at F-Prime Capital.

What check size does Robert Weisskoff write?

Robert Weisskoff typically writes checks of $100K – $10M.

What boards does Robert Weisskoff sit on?

Robert Weisskoff holds tracked board seats at Affinia Therapeutics, Amphora Medical, Caribou Biosciences, Checkmate Pharmaceuticals, Rarecyte, ShouTi Inc., Tempest Therapeutics, Viewray, Xilio Therapeutics, Zenflow.

Where did Robert Weisskoff go to school?

Robert Weisskoff studied at Columbia Business School (MBA); Massachusetts Institute of Technology (PhD, Physics); Harvard University (AB, Physics).

Robert Weisskoff

Investor

Partner at F-Prime Capital

Massachusetts

Writes $100K – $10M checks · typically $5M

Contact· self-published, not guessed

r•••@fprimecapital.comreveal

Experience

F-Prime CapitalPartnercurrent2004 — present
EPIX PharmaceuticalsVP Business Development1998 — 2004
Massachusetts General HospitalDirector, MR Imaging Core1990 — 1998
Harvard Medical SchoolAssociate Professor of Radiology1990 — 1998
Advanced NMR SystemsSr. Physicist1988 — 1990

Deals · 9

Affinia TherapeuticsBoard seat

via F-Prime Capital · filed Oct 2025 · $45M raise

ZenflowBoard seat

via F-Prime Capital · filed Nov 2024 · $25.2M raise

RarecyteBoard seat

via F-Prime Capital · filed Jul 2023 · $35.7M raise

ShouTi Inc.Board seat

via F-Prime Capital · filed Jan 2022 · $7M raise

Caribou BiosciencesBoard seat

via F-Prime Capital · filed Mar 2021 · $115M raise

Xilio TherapeuticsBoard seat

via F-Prime Capital · filed Jan 2021 · $50.2M raise

Checkmate PharmaceuticalsBoard seat

via F-Prime Capital · filed Jan 2020 · $16M raise

Amphora MedicalBoard seat

via F-Prime Capital · filed Jul 2015 · $12.8M raise

ViewrayBoard seat

via F-Prime Capital · filed Jan 2015 · $16.8M raise

Attribution from SEC filings, press coverage, and firm rosters.

Other disclosed investments

Board seats

Tempest Therapeutics

Per SEC Form D filings.

Colleagues at F-Prime Capital

Abby Wagner

Senior Accountant at F-Prime Capital Partners

Abdul Abdirahman

Principal at F-Prime Capital Partners

Alex Pasteur

Partner at F-Prime Capital Partners

Allan Galper

Vice President & Associate General Counsel at F-Prime Capital Partners

Allison MacLeod

Venture Partner at F-Prime Capital Partners

Amber Cai

Venture Partner at F-Prime Capital Partners

Amrit Jalan

Investor at Fine Structures Ventures

Andrew Bognanni

Director of Finance at F-Prime Capital Partners

Frequently asked questions

Who is Robert Weisskoff?: Senior Partner at F-Prime Capital Partners
Where does Robert Weisskoff work?: Robert Weisskoff is Partner at F-Prime Capital.
What check size does Robert Weisskoff write?: Robert Weisskoff typically writes checks of $100K – $10M.
What boards does Robert Weisskoff sit on?: Robert Weisskoff holds tracked board seats at Affinia Therapeutics, Amphora Medical, Caribou Biosciences, Checkmate Pharmaceuticals, Rarecyte, ShouTi Inc., Tempest Therapeutics, Viewray, Xilio Therapeutics, Zenflow.
Where did Robert Weisskoff go to school?: Robert Weisskoff studied at Columbia Business School (MBA); Massachusetts Institute of Technology (PhD, Physics); Harvard University (AB, Physics).