Ken Griffin
ANNX icon

Ken Griffin’s Annexon ANNX Stock Holding History

Ken Griffin’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 		$3.32M Buy
600,135
+324,841
+118% +$1.83M ﹤0.01% 5062
2025
Q4 		$1.38M Buy
275,294
+107,794
+64% +$412K ﹤0.01% 6696
2025
Q3 		$511K Buy
167,500
+154,233
+1,163% +$383K ﹤0.01% 9076
2025
Q2 		$31.8K Buy
13,267
+812
+7% +$1.63K ﹤0.01% 11964
2025
Q1 		$24K Sell
12,455
-12,643
-50% -$42.1K ﹤0.01% 13014
2024
Q4 		$129K Buy
25,098
+19,460
+345% +$120K ﹤0.01% 11099
2024
Q3 		$33.4K Buy
+5,638
New +$33.4K ﹤0.01% 12331
2024
Q2 		– Sell
-258,675
Closed -$1.34M – 14178
2024
Q1 		$1.85M Sell
258,675
-799,012
-76% -$4.15M ﹤0.01% 5678
2023
Q4 		$4.8M Buy
1,057,687
+372,725
+54% +$922K ﹤0.01% 3855
2023
Q3 		$1.62M Sell
684,962
-47,678
-7% -$144K ﹤0.01% 5610
2023
Q2 		$2.58M Sell
732,640
-1,680,477
-70% -$7.35M ﹤0.01% 4715
2023
Q1 		$9.29M Buy
2,413,117
+546,334
+29% +$3.01M ﹤0.01% 2908
2022
Q4 		$9.65M Buy
1,866,783
+460,678
+33% +$2.53M ﹤0.01% 2893
2022
Q3 		$8.69M Sell
1,406,105
-77,558
-5% -$419K ﹤0.01% 2974
2022
Q2 		$5.59M Sell
1,483,663
-257,307
-15% -$786K ﹤0.01% 3585
2022
Q1 		$4.75M Buy
1,740,970
+263,348
+18% +$1.62M ﹤0.01% 4268
2021
Q4 		$17M Sell
1,477,622
-385,001
-21% -$6.22M ﹤0.01% 2227
2021
Q3 		$34.7M Sell
1,862,623
-132,780
-7% -$2.69M 0.01% 1442
2021
Q2 		$44.9M Sell
1,995,403
-98,022
-5% -$2.17M 0.01% 1224
2021
Q1 		$58.3M Sell
2,093,425
-42,690
-2% -$1.17M 0.01% 931
2020
Q4 		$53.5M Buy
2,136,115
+35,795
+2% +$921K 0.01% 907
2020
Q3 		$63.5M Buy
+2,100,320
New +$49.3M 0.02% 703

Other funds holding ANNX

RG
Redmile Group San Francisco, California $1.51B AUM 164.17% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BI
BVF Inc San Francisco, California $3.14B AUM 249.53% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 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
BG
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
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return

Ken Griffin's ANNX Position: Q1 2026 in Review

Ken Griffin increased its Annexon (ANNX) stake by 118% in Q1 2026, buying an estimated $1.83M and bringing the position to 600,135 shares worth $3.32M. The position accounts for ﹤0.01% of the portfolio, ranked #5062.

Ken Griffin first reported a position in ANNX in Q3 2020 and has held it in 22 quarters since. The position peaked at $63.5M in Q3 2020. 217 funds tracked by Wall St. Rank hold ANNX as of Q1 2026.

  • Ken Griffin held 600,135 shares of Annexon worth $3.32M as of Q1 2026.
  • Ken Griffin bought 324,841 Annexon shares in Q1 2026, an estimated $1.83M.
  • Annexon made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #5062 holding.
  • Ken Griffin first reported a position in Annexon in Q3 2020 and has held it in 22 quarters since.
  • Ken Griffin's Annexon position peaked at $63.5M in Q3 2020.
  • 217 funds tracked by Wall St. Rank held Annexon as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.