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Trex Bio (TRXB)10% owner bought ~$2.5M

Alexandria Venture Investments, 10% owner at Trex Bio, bought ~$2.5M of Trex Bio shares.

~$2.5M
Approx. value · 179K sh @ $14.00
1.35M
Holds after · shares reported
Traded
Oct 13, 2026
Filed
Oct 15, 2026

Context

Written by software from the filings listed below · Oct 16, 2026

  • What was filed. SEC Form 4: Alexandria Venture Investments, LLC, 10% owner, reported an open-market purchase of 178,571 TRXB shares at $14.00 each, about $2.5M. The holding after the purchase was 1,346,501 shares.

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The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

  1. Oct 8, 2026Insider · 1 personInsiders: 2 purchases (~$1.3M)
  2. Oct 13, 2026 · this disclosureInsider10% owner purchased ~$2.5M of TRXB shares in the open market

What came next

  1. Oct 13, 2026Company filing · Form 8-K · Bylaws or charterChanged its bylaws, charter or fiscal year
  2. Oct 15, 20265% stakeJohnson & Johnson Innovation - JJDC, Inc. reported a passive stake (13G) of 5.3%
  3. Oct 16, 20265% stakeSV Biotech Crossover Opportunities Fund LP filed an activist stake (13D) of 7.0%
  4. Oct 16, 20265% stakeELI LILLY & Co filed an activist stake (13D) of 19.9%
  5. Oct 16, 20265% stakePFIZER INC. (13-5315170) reported a passive stake (13G) of 7.2%
View the official recordSEC Form 4

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Trex Bio

For Trex Bio, OQRO holds 3 insider filings (SEC Form 4 or Form 144) and 4 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its TRXB page.

How this filing works

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Other disclosures at Trex Bio

Everything OQRO holds on this company is on its TRXB page.

This is one filing. OQRO holds the rest

Insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings and federal contract awards, each one in plain words next to its official filing. On this page it opens why the trade stands out, what the company did around that time, the price since, and every field of the form.

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OQRO describes public disclosures and context calculated from them. It does not give personalized advice and does not recommend any transaction. How OQRO treats data