Adage Capital Partners
IRON icon

Adage Capital Partners’s Disc Medicine IRON Stock Holding History

Adage Capital Partners’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
Q4 		– Sell
-450,000
Closed -$29.7M – 959
2025
Q3 		$29.7M Hold
450,000
– – 0.05% 363
2025
Q2 		$23.8M Buy
450,000
+150,000
+50% +$7.05M 0.04% 399
2025
Q1 		$14.9M Sell
300,000
-50,000
-14% -$2.78M 0.03% 487
2024
Q4 		$22.2M Sell
350,000
-200,000
-36% -$11.6M 0.04% 418
2024
Q3 		$27M Sell
550,000
-68,501
-11% -$3.22M 0.05% 375
2024
Q2 		$27.9M Buy
618,501
+44,037
+8% +$1.5M 0.05% 357
2024
Q1 		$35.8M Sell
574,464
-175,536
-23% -$11.4M 0.07% 308
2023
Q4 		$43.3M Sell
750,000
-558,405
-43% -$28.6M 0.09% 226
2023
Q3 		$61.5M Buy
1,308,405
+145,781
+13% +$7.29M 0.14% 168
2023
Q2 		$51.6M Buy
1,162,624
+335,688
+41% +$11.9M 0.11% 187
2023
Q1 		$17.5M Buy
826,936
+476,874
+136% +$10.6M 0.04% 464
2022
Q4 		$6.96M Buy
350,062
+268,479
+329% +$13.4M 0.02% 715
2022
Q3 		$4.01M Buy
81,583
+52,163
+177% +$2.46M 0.01% 810
2022
Q2 		$1.49M Hold
29,420
– – ﹤0.01% 896
2022
Q1 		$1.23M Buy
29,420
+6,666
+29% +$350K ﹤0.01% 927
2021
Q4 		$1.99M Sell
22,754
-2,500
-10% -$245K ﹤0.01% 869
2021
Q3 		$3.06M Sell
25,254
-4,166
-14% -$569K 0.01% 871
2021
Q2 		$5.71M Sell
29,420
-580
-2% -$191K 0.01% 808
2021
Q1 		$12.2M Buy
+30,000
New +$13.4M 0.02% 615

Other funds holding IRON

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 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
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Adage Capital Partners's IRON Position: Q4 2025 in Review

Adage Capital Partners sold out of Disc Medicine (IRON) in Q4 2025, closing a stake of 450,000 shares — an estimated $29.7M sold.

Adage Capital Partners first reported a position in IRON in Q1 2021 and held it in 19 quarters. The position peaked at $61.5M in Q3 2023. 196 funds tracked by Wall St. Rank hold IRON as of Q4 2025.

  • Adage Capital Partners reported no remaining Disc Medicine position as of Q4 2025 after selling out during the quarter.
  • Adage Capital Partners sold 450,000 Disc Medicine shares in Q4 2025, an estimated $29.7M.
  • Adage Capital Partners first reported a position in Disc Medicine in Q1 2021 and held it in 19 quarters.
  • Adage Capital Partners's Disc Medicine position peaked at $61.5M in Q3 2023.
  • 196 funds tracked by Wall St. Rank held Disc Medicine as of Q4 2025.

Based on Adage Capital Partners's 13F filing for Q4 2025, filed 17 Feb 2026.