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  • Insider Ownership

Insider Trading & Ownership of William D. Clark

Location
Cambridge, MA
Summary
The estimated net worth of William D. Clark is at least $385,470 dollars as of 24 Nov 2025. William D. Clark is the President and CEO, Director of GENOCEA BIOSCIENCES, INC. and owns shares of GENOCEA BIOSCIENCES, INC. stock worth about $380.5K. William D. Clark is the Director of iBio, Inc. and owns shares of iBio, Inc. (IBIO) stock worth about $5K.
Signature
/s/ Marc Banjak, Attorney-in-fact
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Quick Takeaways

  • William D. Clark has 3 issuer positions tracked on this page.
  • Estimated disclosed ownership value: $385,470.
  • Recent insider filing activity is available below.

What Changed

  • Largest disclosed position: GENOCEA BIOSCIENCES, INC. ($380,471).
  • 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.

Official SEC Source

Filed on Form 4

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

See Original Filing

Ownership of William D. Clark

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
GNCA GENOCEA BIOSCIENCES, INC. President and CEO, Director $380,471 02 Jun 2022
IBIO iBio, Inc. Director $4,999 20 Nov 2025
ALDX Aldeyra Therapeutics, Inc. Director 17 Apr 2025

Insider Transactions Reported by William D. Clark:

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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