Janus Henderson Group
ANNX icon

Janus Henderson Group’s Annexon ANNX Stock Holding History

Janus Henderson Group’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 		$328K Buy
+59,100
New +$333K ﹤0.01% 2179
2025
Q2 		– Sell
-34,500
Closed -$77.8K – 2409
2025
Q1 		$77.8K Hold
34,500
– – ﹤0.01% 2473
2024
Q4 		$177K Buy
+34,500
New +$212K ﹤0.01% 2458
2021
Q3 		– Sell
-581,747
Closed -$13.1M – 2192
2021
Q2 		$13.1M Buy
+581,747
New +$12.9M 0.01% 882
2021
Q1 		– Sell
-928,251
Closed -$22.1M – 1560
2020
Q4 		$22.1M Sell
928,251
-799,197
-46% -$20.6M 0.01% 734
2020
Q3 		$49.4M Buy
+1,727,448
New +$40.5M 0.03% 504

Other funds holding ANNX

RG
Redmile Group San Francisco, California $1.51B AUM 164.17% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 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 $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
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

Janus Henderson Group's ANNX Position: Q1 2026 in Review

Janus Henderson Group opened a new position in Annexon (ANNX) in Q1 2026: 59,100 shares worth $328K. The stake represents ﹤0.01% of the portfolio and ranks #2179 among its holdings. This is a return to the name: Janus Henderson Group previously reported a position in ANNX as recently as Q1 2025.

Janus Henderson Group first reported a position in ANNX in Q3 2020 and has held it in 6 quarters since. The position peaked at $49.4M in Q3 2020. 217 funds tracked by Wall St. Rank hold ANNX as of Q1 2026.

  • Janus Henderson Group held 59,100 shares of Annexon worth $328K as of Q1 2026.
  • Annexon was a new Janus Henderson Group position in Q1 2026.
  • Annexon made up ﹤0.01% of Janus Henderson Group's portfolio in Q1 2026, its #2179 holding.
  • Janus Henderson Group first reported a position in Annexon in Q3 2020 and has held it in 6 quarters since.
  • Janus Henderson Group's Annexon position peaked at $49.4M in Q3 2020.
  • 217 funds tracked by Wall St. Rank held Annexon as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.