Jane Street
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Jane Street’s Disc Medicine IRON Stock Holding History

Jane Street’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 		$527K Buy
+7,200
New +$495K ﹤0.01% 7886
2026
Q1 		– Sell
-2,600
Closed -$206K – 12254
2025
Q4 		$206K Buy
+2,600
New +$220K ﹤0.01% 9657
2024
Q2 		– Sell
-25,500
Closed -$1.59M – 9773
2024
Q1 		$1.59M Buy
+25,500
New +$1.65M ﹤0.01% 4549

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

Jane Street's IRON Position: Q2 2026 in Review

Jane Street opened a new position in Disc Medicine (IRON) in Q2 2026: 16,011 shares worth $1.17M. The stake represents ﹤0.01% of the portfolio and ranks #6196 among its holdings. This is a return to the name: Jane Street previously reported a position in IRON as recently as Q3 2025.

Jane Street first reported a position in IRON in Q4 2021 and has held it in 10 quarters since. The position peaked at $2.54M in Q1 2024. 216 funds tracked by Wall St. Rank hold IRON as of Q2 2026.

  • Jane Street held 16,011 shares of Disc Medicine worth $1.17M as of Q2 2026.
  • Disc Medicine was a new Jane Street position in Q2 2026.
  • Disc Medicine made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #6196 holding.
  • Jane Street first reported a position in Disc Medicine in Q4 2021 and has held it in 10 quarters since.
  • Jane Street's Disc Medicine position peaked at $2.54M in Q1 2024.
  • 216 funds tracked by Wall St. Rank held Disc Medicine as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.