Who's buying TRex Bio, Inc.?

TRXB insider buying, 13F and 13D filings

• Oct 16, 202613D stake (no activist plan)
  SV Biotech Crossover Opportunities Fund LP (+1): New Schedule 13D: 7.0% stake
  The Reporting Persons initially acquired the Preferred Stock underlying the Shares for investment purposes only. The Reporting Persons believe that the Issuer is an attractive investment opportunity. Depending upon overall market conditions, other investment opportunities availab…
  View the filing on SEC EDGAR ↗
• Oct 16, 202613D stake (no activist plan)
  ELI LILLY & Co: New Schedule 13D: 19.9% stake
  The Reporting Person acquired the securities reported herein for investment purposes and intends to continue to review its investments in the Issuer on an ongoing basis. Except as set forth herein, the Reporting Person does not currently have any specific plan or proposal to acqu…
  View the filing on SEC EDGAR ↗
• Oct 15, 2026Form 4 · 10% owner
  Alexandria Venture Investments, LLC: Bought $2.5M on the open market
  178.6K shares at ~$14.00, traded 2026-10-13. Now holds 1.35M shares (stake up 15%).
  View the filing on SEC EDGAR ↗
• Oct 13, 2026Bought in offering
  SVLSF VI, LLC (+2 joint): Bought $1.3M in the IPO
  92.9K shares at ~$14.00, traded 2026-10-08. Now holds 7.4K shares (new position). Shares came from the IPO, per the filing's footnotes, not open-market buying.
  View the filing on SEC EDGAR ↗

Signals come from SEC filings: Form 4 (insiders, filed within 2 business days), 13F (fund holdings, up to 45 days after quarter end) and Schedule 13D (5%+ activist stakes). This page reports what the filings show; it is not investment advice.