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MPM BioImpact’s Annexon ANNX Stock Holding History

MPM BioImpact’s Portfolio ANNX Stock Details ANNX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$20.2M Buy
+3,544,354
New +$19.6M 1.23% 32

Other funds holding ANNX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RG
Redmile Group San Francisco, California $1.49B AUM 208.7% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
BI
BVF Inc San Francisco, California $3.91B AUM 304.52% 1-Year Est. Return
WP
Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
MCO
MAK Capital One New York $714M AUM 68.07% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return

MPM BioImpact's ANNX Position: Q2 2026 in Review

MPM BioImpact opened a new position in Annexon (ANNX) in Q2 2026: 3,544,354 shares worth $20.2M. The stake represents 1.23% of the portfolio and ranks #32 among its holdings.

213 funds tracked by Wall St. Rank hold ANNX as of Q2 2026.

  • MPM BioImpact held 3,544,354 shares of Annexon worth $20.2M as of Q2 2026.
  • Annexon was a new MPM BioImpact position in Q2 2026.
  • Annexon made up 1.23% of MPM BioImpact's portfolio in Q2 2026, its #32 holding.
  • 213 funds tracked by Wall St. Rank held Annexon as of Q2 2026.

Based on MPM BioImpact's 13F filing for Q2 2026, filed 14 Aug 2026.