Annexon Funding History

Since Annexon was founded in 2011, it has participated in 8 rounds of funding. In total Annexon has raised $835.3M. Annexon's last funding round was on Jul 2026 for a total of $200.0M.

Annexon Funding Rounds

Post-IPO Debt

Jul 2026

$200M

Oxford Finance LLC

Private Placement

Jul 2022

$130.5M

Redmile Group, Adage Capital Partners LP, Bain Capital Life Sciences, Driehaus Capital Management, Fairmount, Venrock Healthcare Capital Partners

IPO

Jul 2020

$250.8M

Series C

Jun 2020

$100M

Redmile Group, BlackRock, Deerfield Management Company, Eventide Asset Management, Farallon Capital Management, Janus Henderson Investors, Logos Capital, Adage Capital Partners, Bain Capital Life Sciences, Blackstone Life Sciences, New Enterprise Associates, Surveyor Capital

Series C

Dec 2018

$75M

Bain Capital Life Sciences, Surveyor Capital, Adage Capital Partners, New Enterprise Associates, Blackstone Life Sciences, Novartis Venture Fund

Annexon Investors

Oxford Finance LLC

Post-IPO Debt

Jul 2026

Redmile Group

Private Placement, Series C

Jul 2022, Jun 2020

Adage Capital Partners LP

Private Placement

Jul 2022

Bain Capital Life Sciences

Private Placement, Series C

Jul 2022, Jun 2020, Dec 2018

Driehaus Capital Management

Private Placement

Jul 2022

Annexon has 22 investors, including Oxford Finance LLC, Redmile Group and Adage Capital Partners LP. The latest investment occurred in Jul 2026.

Annexon Funding History

Since Annexon was founded in 2011, it has participated in 8 rounds of funding. In total Annexon has raised $835.3M. Annexon's last funding round was on Jul 2026 for a total of $200.0M.

Annexon Funding Rounds

ROUND

FUNDING DATE

AMOUNT

NUMBER OF INVESTORS

INVESTORS

Total Funding: $835.3M

Annexon Investors

INVESTOR

ROUND

FUNDING DATE

Total Investors: 22