BBTX SCHEDULE 13D: SEC filing

Filed with the SEC on · accession 0001346824-26-000253

BBTX filed a SCHEDULE 13D (schedule 13d) with the SEC on Nov 6, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -0.8% by the first close after the filing.

Summary of the filing

RA Capital Management, Peter Kolchinsky, Rajeev Shah, and RA Capital Healthcare Fund filed a Joint Filing Agreement as an exhibit to a Schedule 13D regarding their beneficial ownership of Bambusa Therapeutics common stock.

Key details

Filer/beneficial ownerRA Capital Management, L.P.
Filer/beneficial ownerRA Capital Healthcare Fund, L.P.
IssuerBambusa Therapeutics, Inc.
Authorized signatory, ra capital management, l.p.Peter Kolchinsky
FilerRajeev Shah

How BBTX stock reacted

Close before

$15.85

Nov 5, 2026

First close after

-0.76%

$15.73

5 trading days

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Since filing

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Frequently asked questions

What did BBTX file with the SEC on Nov 6, 2026?

BBTX filed a SCHEDULE 13D (SEC filing). RA Capital Management, Peter Kolchinsky, Rajeev Shah, and RA Capital Healthcare Fund filed a Joint Filing Agreement as an exhibit to a Schedule 13D regarding their beneficial ownership of Bambusa Therapeutics common stock.

How do I read a SCHEDULE 13D?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13D (schedule 13d): A report the company filed with the SEC (the US market regulator).

How did BBTX stock react to this filing?

BBTX closed at $15.85 before the filing and $15.73 on Nov 6, 2026 (-0.76%).

Other BBTX SEC filings

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