Insider Trading & Ownership of Stephen W. Webster

Location
Cambridge, MA
Summary
The estimated net worth of Stephen W. Webster is at least $64,731 dollars as of 24 Jun 2025. Stephen W. Webster is the Director of Gritstone bio, Inc. and owns shares of Gritstone bio, Inc. stock worth about $47.6K. Stephen W. Webster is the Director of Nabriva Therapeutics plc and owns shares of Nabriva Therapeutics plc stock worth about $17.2K.
Signature
/s/ Steven P. Cobourn, as attorney-in-fact for Stephen W. Webster
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Quick Takeaways

  • Stephen W. Webster has 5 issuer positions tracked on this page.
  • Estimated disclosed ownership value: $64,731.
  • Recent insider filing activity is available below.

What Changed

  • Largest disclosed position: Gritstone bio, Inc. ($47,560).
  • Past-year value change for that position: .

Why This Matters

  • This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
  • You can cross-check role, issuer, and filing chronology directly against the SEC source.

Source Evidence

Filed on Form 4

Insider ownership context is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Ownership of Stephen W. Webster

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
GRTS Gritstone bio, Inc. Director $47,560 04 Apr 2025
NBRV Nabriva Therapeutics plc Director $17,171 02 Aug 2022
CGEM Cullinan Therapeutics, Inc. Director 12 Jun 2025
NXTC NextCure, Inc. Director 20 Jun 2025
TCRR TCR2 THERAPEUTICS INC. Director 01 Jun 2023

Insider Transactions Reported by Stephen W. Webster:

Sym Company Class Transaction % Value $ * Price $ Shares Shares After Date Ownership
* An asterisk sign (*) next to the price indicates that the price is likely invalid.
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