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Sidewinder Therapeutics

As of 14 Oct 2026, Sidewinder Therapeutics has raised $137M across 1 verified round on record; latest: $137 million Series B led by Frazier Life Sciences and Novartis, announced 8 Apr 2026.

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Sidewinder Therapeutics specializes in developing bispecific antibody-drug conjugates aimed at treating difficult cancers for patients.

sidewinderbio.comSan Diego, CA

LATEST ROUND

Series B

$137M · 2026-04-08

RAISED ON RECORD · USD

$137M

1 verified round · $162M to date, as reported

INVESTORS

2 leads

SOURCES

from 2 publishers

Rounds

[ 1 ]

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Company

Every round on record, with the sources behind each and the investors on them.

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Round	Amount	Announced	Lead	Buzz
Series B [ HISTORY ]: An earlier round, from the company's own announcement, found while researching the company. Checked like any round, but not new, so it stays out of the daily feed and alerts; a date range shows it.	$137M $162M to date	2026-04-08	Frazier Life Sciences, Novartis	No recent discussion
2 sources [ VERIFIED ] read against 2 sources Source 1 shows Published: 2026-04-07, but its dateline says April 8, 2026; the dated BusinessWire release also says Apr 8, so April 8 wins. [ BUILT WITH ]·[ SEARCH ]found by Firecrawl search·[ SCRAPE ]2 pages read: sidewinderbio.com, businesswire.com·[ JSON ]round read into a schema, with the sentence that states it·[ VERIFY ]confirmedchecked against 2 sources·[ BRANDING ]logo and colour from the homepage

Sidewinder Therapeutics

Rounds

Company

Rounds

Sources

Profile

Investors

Sidewinder Therapeutics

Rounds

Profile

Sources

Series B$137M2026-04-082 sources

Investors

Series B$137M2026-04-089 investors