American Century Companies
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American Century Companies’s Disc Medicine IRON Stock Holding History

American Century Companies’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
2026
Q1 		– Sell
-30,328
Closed -$2.41M – 2884
2025
Q4 		$2.41M Buy
30,328
+2,390
+9% +$202K ﹤0.01% 2019
2025
Q3 		$1.85M Buy
+27,938
New +$1.66M ﹤0.01% 2090

Other funds holding IRON

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return

American Century Companies's IRON Position: Q1 2026 in Review

American Century Companies sold out of Disc Medicine (IRON) in Q1 2026, closing a stake of 30,328 shares — an estimated $2.41M sold.

American Century Companies first reported a position in IRON in Q3 2025 and held it in 2 quarters. The position peaked at $2.41M in Q4 2025. 203 funds tracked by Wall St. Rank hold IRON as of Q1 2026.

  • American Century Companies reported no remaining Disc Medicine position as of Q1 2026 after selling out during the quarter.
  • American Century Companies sold 30,328 Disc Medicine shares in Q1 2026, an estimated $2.41M.
  • American Century Companies first reported a position in Disc Medicine in Q3 2025 and held it in 2 quarters.
  • American Century Companies's Disc Medicine position peaked at $2.41M in Q4 2025.
  • 203 funds tracked by Wall St. Rank held Disc Medicine as of Q1 2026.

Based on American Century Companies's 13F filing for Q1 2026, filed 15 May 2026.