Fundraising Fox
Robert Weisskoff
InvestorSenior Partner at F-Prime Capital
Massachusetts
Writes $100K – $10M checks · typically $5M
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Contact· self-published, not guessed
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
Sources: SEC Form D filings · curated public sources.
Colleagues at F-Prime Capital
Frequently asked questions
- Who is Robert Weisskoff?
- Senior Partner at F-Prime Capital Partners
- Where does Robert Weisskoff work?
- Robert Weisskoff is Senior 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, Basecamp Bio, Caribou Biosciences, Checkmate Pharmaceuticals, Rarecyte, ShouTi Inc., Tempest Therapeutics, Viewray, Xilio Therapeutics.
- What companies has Robert Weisskoff invested in?
- Investments tracked here include Adela, Affinia Therapeutics, Countable Labs, Plasmagen Biosciences, Rarecyte, Shinobi Therapeutics Inc., Tempest Therapeutics.
About this profile. Compiled from public sources — F-Prime Capital's own website, regulatory filings and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights