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CLYM SCHEDULE 13D/A: SEC filing

RA Capital Management

Filed with the SEC on · accession 0001346824-26-000257

CLYM filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Nov 9, 2026. RA Capital Management filed an amended Schedule 13D reporting that its beneficial ownership percentage changed due to an increase in Climb Bio's outstanding shares, not due to any acquisition or disposition by RA Capital. The stock moved +7.0% by the first close after the filing.

Summary of the filing

RA Capital Management filed an amended Schedule 13D reporting that its beneficial ownership percentage changed due to an increase in Climb Bio's outstanding shares, not due to any acquisition or disposition by RA Capital. RA Capital and related entities collectively beneficially own approximately 23,941,277 shares, representing about 33.0% of the company.

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Key details

Total shares beneficially owned by Reporting Persons$23.9M
Shares held directly by RA Capital Healthcare Fund, L.P.$3.9M
Shares underlying pre-funded warrants held by RA Capital Healthcare Fund, L.P.$22.5M
Shares held directly by RA Capital Nexus Fund III, L.P.$3.7M
Reporting person / investment adviserRA Capital Management, L.P.
Reporting person / shareholderRA Capital Healthcare Fund, L.P.
Reporting person / shareholderRA Capital Nexus Fund III, L.P.
IssuerClimb Bio, Inc.
Managing member/controlling person of ra capital management gp, llcPeter Kolchinsky
Managing member/controlling person of ra capital management gp, llcRajeev Shah

How CLYM stock reacted

Close before

$10.29

Nov 6, 2026

First close after

+7.00%

$11.01

5 trading days

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Since filing

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Frequently asked questions

What did CLYM file with the SEC on Nov 9, 2026?

CLYM filed a SCHEDULE 13D/A (SEC filing). RA Capital Management filed an amended Schedule 13D reporting that its beneficial ownership percentage changed due to an increase in Climb Bio's outstanding shares, not due to any acquisition or disposition by RA Capital. RA Capital and related entities collectively beneficially own approximately 23,941,277 shares, representing about 33.0% of the company.

How do I read a SCHEDULE 13D/A?

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/A (schedule 13d/a): A report the company filed with the SEC (the US market regulator).

How did CLYM stock react to this filing?

CLYM closed at $10.29 before the filing and $11.01 on Nov 9, 2026 (+7.00%).

Other CLYM SEC filings

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