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Bambusa Therapeutics (BBTX): Director bought ~$2.7M

RA CAPITAL MANAGEMENT, Director at Bambusa Therapeutics, bought ~$2.7M of Bambusa Therapeutics shares.

~$2.7M
Approx. value · 190K sh @ $14.23
190K
Holds after · shares reported
Traded
Oct 30, 2026
Filed
Nov 3, 2026

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 30, 2026 · this disclosureInsiderDirector purchased ~$2.7M of BBTX shares in the open market

What came next

  1. Oct 30, 2026InsiderDirector purchased ~$3.94M of BBTX shares in the open market
  2. Nov 2, 2026Company filing · Form 8-K · Bylaws or charter, Reg FDChanged its bylaws, charter or fiscal year, and shared information with investors
  3. Nov 2, 2026Insider · 3 peopleInsiders: 4 purchases (~$52.0M)
  4. Nov 5, 20265% stakeThomas Maier reported a passive stake (13G) of 9.2%
  5. Nov 6, 20265% stakeRA Capital Management, L.P. filed an activist stake (13D) of 14.6%
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 Bambusa Therapeutics

For Bambusa Therapeutics, OQRO holds 6 insider filings (SEC Form 4 or Form 144) and 2 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 BBTX page.

Other recent filings by RA CAPITAL MANAGEMENT, L.P., Director

The full history of RA CAPITAL MANAGEMENT, L.P., Director is on the profile page.

How this filing works

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Other disclosures at Bambusa Therapeutics

Everything OQRO holds on this company is on its BBTX 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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