Sean O'Connor

Principal atLongwood FundMassachusetts

Sean O'Connor is a Principal at Longwood Fund, previously a Principal investor at the T1D Fund. He led investments in SAB Biotherapeutics and vTv Therapeutics, and has academic research and consulting experience.

What Sean can write

Writes checks ofNot reported
Comes in atPre-seed, Seed, Series ACan lead the round
Ownership target7-10%At first check
Email the firm[email protected]The firm's own inbox for founders.

Career

  1. The Rockefeller University · academic researcher
  2. Boston Consulting Group · healthcare consultant
  3. T1D Fund · Principal investor
  4. Longwood Fund · Principal
    Now

Investments named in public bios

SAB BiotherapeuticsvTv Therapeutics

Focus

biotechhealthmedtechai

Also at Longwood Fund

Partners like Sean

At firms with a similar stage, sector and check size.

Alert me when Longwood Fund is active

One email when Sean's firm raises a fund, adds a partner or shows new activity.

Founders and investors at a Mode VC gathering

Send Mode VC your deck

Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.

Send your deck

Questions

Who is Sean O'Connor?

Sean O'Connor is a Principal at Longwood Fund, previously a Principal investor at the T1D Fund. He led investments in SAB Biotherapeutics and vTv Therapeutics, and has academic research and consulting experience.

How much does Sean O'Connor invest?

Longwood Fund has not reported a check size. It invests at pre-seed, seed, series a.

How do I pitch Sean O'Connor?

Email [email protected], the firm's inbox for founders, and name Sean in the subject. A warm intro from a founder Longwood Fund backed works better.

What did Sean O'Connor do before Longwood Fund?

academic researcher at The Rockefeller University; healthcare consultant at Boston Consulting Group; Principal investor at T1D Fund.

Last updated 2026-10-15. Is this you? Ask for a correction.