Mariner’s Annexon ANNX Stock Holding History

Mariner’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 Q1	$295K	Buy	53,242 +21,907	+70%	+$123K	﹤0.01%	2895
2025 Q4	$157K	Buy	+31,335	New	+$120K	﹤0.01%	3234

Other funds holding ANNX

Redmile Group San Francisco, California $1.51B AUM 164.17% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

BVF Inc San Francisco, California $3.14B AUM 249.53% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

BCLSI

Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return

Bellevue Group Kuesnacht, Switzerland $4.2B AUM 54.85% 1-Year Est. Return

MCO

MAK Capital One New York $679M AUM 29.02% 1-Year Est. Return

Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return

Mariner's ANNX Position: Q1 2026 in Review

Mariner increased its Annexon (ANNX) stake by 70% in Q1 2026, buying an estimated $123K and bringing the position to 53,242 shares worth $295K. The position accounts for ﹤0.01% of the portfolio, ranked #2895.

Mariner first reported a position in ANNX in Q4 2025 and has held it in 2 quarters since. 217 funds tracked by Wall St. Rank hold ANNX as of Q1 2026.

Mariner held 53,242 shares of Annexon worth $295K as of Q1 2026.
Mariner bought 21,907 Annexon shares in Q1 2026, an estimated $123K.
Annexon made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #2895 holding.
Mariner first reported a position in Annexon in Q4 2025 and has held it in 2 quarters since.
217 funds tracked by Wall St. Rank held Annexon as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.