Marshall Wace
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Marshall Wace’s Disc Medicine IRON Stock Holding History

Marshall Wace’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 		$2.52M Buy
+34,394
New +$2.36M ﹤0.01% 1732
2026
Q1 		– Sell
-4,642
Closed -$369K – 3450
2025
Q4 		$369K Sell
4,642
-9,359
-67% -$791K ﹤0.01% 2372
2025
Q3 		$925K Buy
+14,001
New +$833K ﹤0.01% 1968
2024
Q3 		– Sell
-12,300
Closed -$554K – 2731
2024
Q2 		$554K Buy
+12,300
New +$418K ﹤0.01% 1921

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 $3.38T AUM 44.17% 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

Marshall Wace's IRON Position: Q2 2026 in Review

Marshall Wace opened a new position in Disc Medicine (IRON) in Q2 2026: 34,394 shares worth $2.52M. The stake represents ﹤0.01% of the portfolio and ranks #1732 among its holdings. This is a return to the name: Marshall Wace previously reported a position in IRON as recently as Q4 2025.

Marshall Wace first reported a position in IRON in Q2 2024 and has held it in 4 quarters since. 216 funds tracked by Wall St. Rank hold IRON as of Q2 2026.

  • Marshall Wace held 34,394 shares of Disc Medicine worth $2.52M as of Q2 2026.
  • Disc Medicine was a new Marshall Wace position in Q2 2026.
  • Disc Medicine made up ﹤0.01% of Marshall Wace's portfolio in Q2 2026, its #1732 holding.
  • Marshall Wace first reported a position in Disc Medicine in Q2 2024 and has held it in 4 quarters since.
  • 216 funds tracked by Wall St. Rank held Disc Medicine as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.