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Thomas DesRosier

Insider · Officer · MCRB

Thomas DesRosier files insider transactions with the SEC as an officer of Seres Therapeutics (MCRB). We hold 3 disclosed purchases and sales filed since 27 May 2008, 1 of them in the last 90 days.

  • Files forMCRB
  • Disclosed buys and sells3 in all, 1 in the last 90 days
  • Last disclosure18 August 2026

Positions held

4 posts we hold — a term names its own dates; a run of filings only says when they filed
  • Filed 1 June 2016 — 17 August 2026Officer · Seres Therapeutics (MCRB)82 Form 4 lines · source: SEC Form 4
  • Filed 18 February 2015 — 7 March 2016EVP, General Counsel · Ariad Pharmaceuticals (ARIA)7 Form 4 lines · source: SEC Form 4
  • Filed 15 April 2013 — 21 January 2015EVP, Chief Legal · Cubist Pharmaceuticals (CBST)27 Form 4 lines · source: SEC Form 4
  • Filed 22 May 2008 — 4 April 2011Sr VP, General Counsel · Genzyme (GENZ)31 Form 4 lines · source: SEC Form 4

Everything they disclosed

120 entries, newest first — one per disclosure report, one per Form 4 line

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.