XT
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XTX Topco’s Disc Medicine IRON Stock Holding History

XTX Topco’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
Q2 		$4.15M Buy
56,710
+22,292
+65% +$1.53M 0.05% 488
2026
Q1 		$2.2M Buy
34,418
+11,324
+49% +$786K 0.04% 756
2025
Q4 		$1.83M Buy
+23,094
New +$1.95M 0.05% 620

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
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 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
VPC
Vestal Point Capital New York $4.28B AUM 239% 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

XTX Topco's IRON Position: Q2 2026 in Review

XTX Topco increased its Disc Medicine (IRON) stake by 65% in Q2 2026, buying an estimated $1.53M and bringing the position to 56,710 shares worth $4.15M. The position accounts for 0.05% of the portfolio, ranked #488.

XTX Topco first reported a position in IRON in Q4 2025 and has held it in 3 quarters since. 216 funds tracked by Wall St. Rank hold IRON as of Q2 2026.

  • XTX Topco held 56,710 shares of Disc Medicine worth $4.15M as of Q2 2026.
  • XTX Topco bought 22,292 Disc Medicine shares in Q2 2026, an estimated $1.53M.
  • Disc Medicine made up 0.05% of XTX Topco's portfolio in Q2 2026, its #488 holding.
  • XTX Topco first reported a position in Disc Medicine in Q4 2025 and has held it in 3 quarters since.
  • 216 funds tracked by Wall St. Rank held Disc Medicine as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.