Third Arc Bio

Third Arc Bio is advancing antibody technology by unlocking the powerful biology of immune synapses to address solid tumors and autoimmune diseases.

Health and bio

TIMELINE · MONEY RAISED

Third Arc Bio | 150 days from website to first raise on record

Raised $217M in 2 sourced rounds·1 signal before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

Date	Round	Amount	Lead	Source
Feb 4, 2026	Series A	$52M	AAndreessen Horowitz	fundraisingfox.com
Jul 22, 2024	Series A	$165M	CCormorant Asset Management	vator.tv

Timeline

1. February 23, 2024
   Website created

Founders and team

• SS
  Sanjaya Singh Founder and Chief Scientific Officer

  LinkedIn · source: thirdarcbio.com

Investors

• AAbbVie
• AAberdeen
• AAlderline Group
• AAndreessen Horowitzlead investor
• BBiotechnology Value Fund
• CCormorant Asset Managementlead investor
• FForesite Capital
• GGalapagos
• GGoldman Sachs Alternatives
• HHillhouse Investmentlead investor
• JJanus Henderson Investors
• LLogos Capital
• MMarshall Wace
• OOmega Funds
• TT. Rowe Price
• VVida Ventureslead investor

Companies like Third Arc Bio

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• AAltruBio$225M Series B+ · May 2024
• AAbcuro$66M Series B+ · Aug 2026
• ZZag BioSeries A

Other companies backed by Andreessen Horowitz

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• TTutor Intelligence$75M Series B+ · Nov 2026
• NNorthwood$375M Series B+ · Nov 2026
• LLarridin$30M Series A · Nov 2026
• MMidstream Health$20M Series A · Oct 2026
• WWabi$55M Series A · Oct 2026

Andreessen Horowitz portfolio →