Hudson Bay Capital Management
IRON icon

Hudson Bay Capital Management’s Disc Medicine IRON Stock Holding History

Hudson Bay Capital Management’s Portfolio IRON Stock Details IRON Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-102,185
Closed -$6.75M – 1357
2025
Q3 		$6.75M Buy
+102,185
New +$6.08M 0.02% 468
2024
Q1 		– Sell
-62,000
Closed -$3.58M – 806
2023
Q4 		$3.58M Buy
62,000
+20,000
+48% +$1.02M 0.02% 361
2023
Q3 		$1.97M Buy
+42,000
New +$2.1M 0.02% 484

Other funds holding IRON

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
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Hudson Bay Capital Management's IRON Position: Q4 2025 in Review

Hudson Bay Capital Management sold out of Disc Medicine (IRON) in Q4 2025, closing a stake of 102,185 shares — an estimated $6.75M sold.

Hudson Bay Capital Management first reported a position in IRON in Q3 2023 and held it in 3 quarters. The position peaked at $6.75M in Q3 2025. 196 funds tracked by Wall St. Rank hold IRON as of Q4 2025.

  • Hudson Bay Capital Management reported no remaining Disc Medicine position as of Q4 2025 after selling out during the quarter.
  • Hudson Bay Capital Management sold 102,185 Disc Medicine shares in Q4 2025, an estimated $6.75M.
  • Hudson Bay Capital Management first reported a position in Disc Medicine in Q3 2023 and held it in 3 quarters.
  • Hudson Bay Capital Management's Disc Medicine position peaked at $6.75M in Q3 2025.
  • 196 funds tracked by Wall St. Rank held Disc Medicine as of Q4 2025.

Based on Hudson Bay Capital Management's 13F filing for Q4 2025, filed 13 Feb 2026.