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Cubist Systematic Strategies’s Disc Medicine IRON Stock Holding History

Cubist Systematic Strategies’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
Q3 		$576K Buy
+8,714
New +$518K ﹤0.01% 2211
2025
Q1 		– Sell
-20,187
Closed -$1.28M – 3165
2024
Q4 		$1.28M Buy
+20,187
New +$1.17M 0.01% 1658
2021
Q4 		– Sell
-53
Closed -$6K – 3540
2021
Q3 		$6K Sell
53
-364
-87% -$49.7K ﹤0.01% 2915
2021
Q2 		$81K Buy
+417
New +$137K ﹤0.01% 2739

Other funds holding IRON

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
O
OrbiMed New York $5.05B AUM 125.28% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Cubist Systematic Strategies's IRON Position: Q3 2025 in Review

Cubist Systematic Strategies opened a new position in Disc Medicine (IRON) in Q3 2025: 8,714 shares worth $576K. The stake represents ﹤0.01% of the portfolio and ranks #2211 among its holdings. This is a return to the name: Cubist Systematic Strategies previously reported a position in IRON as recently as Q4 2024.

Cubist Systematic Strategies first reported a position in IRON in Q2 2021 and has held it in 4 quarters since. The position peaked at $1.28M in Q4 2024. 168 funds tracked by Wall St. Rank hold IRON as of Q3 2025.

  • Cubist Systematic Strategies held 8,714 shares of Disc Medicine worth $576K as of Q3 2025.
  • Disc Medicine was a new Cubist Systematic Strategies position in Q3 2025.
  • Disc Medicine made up ﹤0.01% of Cubist Systematic Strategies's portfolio in Q3 2025, its #2211 holding.
  • Cubist Systematic Strategies first reported a position in Disc Medicine in Q2 2021 and has held it in 4 quarters since.
  • Cubist Systematic Strategies's Disc Medicine position peaked at $1.28M in Q4 2024.
  • 168 funds tracked by Wall St. Rank held Disc Medicine as of Q3 2025.

Based on Cubist Systematic Strategies's 13F filing for Q3 2025, filed 14 Nov 2025.