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Stephen Chambers

General Partner & Managing Director, SOSV NY atSOSV SF & NY (Fka IndieBio)California
SOSV SF & NY (Fka IndieBio) websiteFirm profile

Stephen Chambers is a General Partner at SOSV and Managing Director of IndieBio NY. He has experience as a scientist at Vertex Pharmaceuticals and as CEO of SynbiCITE.

What Stephen can write

Writes checks of$500K to $1M
Comes in atPre-seedCan lead the round
Ownership target10-12%At first check
Best routeA warm introAsk a founder in their portfolio.

SOSV SF & NY (Fka IndieBio) writes $500K to $1M checks, larger than 71% of firms in the atlas.

Bars: how many firms report each check band. Highlighted: SOSV SF & NY (Fka IndieBio).

Career

  1. Vertex Pharmaceuticals · founding scientist
  2. Abpro Therapeutics
  3. SynbiCITE · CEO
  4. Bio-start
  5. IndieBio · mentor
    2018-2020
  6. SOSV · General Partner, SOSV & Managing Director
    2020-null
  7. SOSV SF & NY (Fka IndieBio) · General Partner & Managing Director, SOSV NY
    Now

Companies founded

IndieBio NYAbpro TherapeuticsBio-start

Focus

Biotechpharmasynthetic biologyimmunologyLife Science

Also at SOSV SF & NY (Fka IndieBio)

Po BronsonGeneral Partner & Managing Director, SOSV SF

Partners like Stephen

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

Rick Moss
Rick MossFounding Partner, Better Ventures
Avra van der Zee
Avra van der ZeeGeneral Partner, SOSV
Ann DeWitt
Ann DeWittGeneral Partner, The Engine
Jamie RutledgeGeneral Partner, Bluelake
Ela Madej
Ela MadejCo-Founder and Partner, Fifty Years
Chris McLeod
Chris McLeodManaging Partner, Elm Street Ventures

Alert me when SOSV SF & NY (Fka IndieBio) is active

One email when Stephen'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.

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Questions

Who is Stephen Chambers?

Stephen Chambers is a General Partner at SOSV and Managing Director of IndieBio NY. He has experience as a scientist at Vertex Pharmaceuticals and as CEO of SynbiCITE.

How much does Stephen Chambers invest?

Stephen Chambers invests through SOSV SF & NY (Fka IndieBio), which writes checks of $500K to $1M at pre-seed.

How do I pitch Stephen Chambers?

A warm intro from a founder SOSV SF & NY (Fka IndieBio) backed works best.

What did Stephen Chambers do before SOSV SF & NY (Fka IndieBio)?

founding scientist at Vertex Pharmaceuticals; Abpro Therapeutics; CEO at SynbiCITE; Bio-start; mentor at IndieBio; General Partner, SOSV & Managing Director at SOSV.

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