Company · Ownership research

Climb Bio, Inc. CLYM

CIK 0001768446

Form 4 transactions dated Sep 1, 2023 to Sep 25, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-07-01.

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Insider purchases & sales

Purchased: $50.73M
Sold: $4.78M

Sep 1, 2023 – Jul 1, 2026
Available records · partial months are marked ·

Insiders in this window

20266 of 6 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-06-29	Brennan Aoife President and CEO · Director	Sale10b5-1 footnote	$406.98K 30,902 shares sold	26.05% sold Direct holding	▾
2026-02-26	Thomas Stephen Basil Director	Sale10b5-1 footnote	$114.29K 16,313 shares sold	9.54% sold Direct holding	▾
2026-02-25	Thomas Stephen Basil Director	Sale10b5-1 footnote	$235.96K 33,687 shares sold	16.46% sold Direct holding	▾
2026-02-13	Thomas Stephen Basil Director	Sale10b5-1 footnote	$58.14K 10,000 shares sold	4.66% sold Direct holding	▾
2026-02-12	Thomas Stephen Basil Director	Sale10b5-1 footnote	$470.99K 90,000 shares sold	29.54% sold Direct holding	▾
2026-01-05	RA Capital Healthcare Fund LP · RA CAPITAL MANAGEMENT, L.P. · Kolchinsky Peter · Shah Rajeev M. · RA Capital Nexus Fund, L.P. · RA Capital Nexus Fund II, L.P. · RA Capital Nexus Fund III, L.P. Director · 10% owner	Purchase	$24.89K 7,111 shares bought	Unavailable Indirect holding	▾

Showing 6 / 6 record groups in 2026. The complete set is available through the API.

Climb Bio, Inc. · CLYM

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{"ticker":"CLYM","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.