Millennium Management
IRON icon

Millennium Management’s Disc Medicine IRON Stock Holding History

Millennium Management’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
Q1 		$5.32M Sell
83,259
-101,520
-55% -$7.05M ﹤0.01% 2866
2025
Q4 		$14.7M Buy
184,779
+23,779
+15% +$2.01M 0.01% 1875
2025
Q3 		$10.6M Buy
161,000
+139,407
+646% +$8.29M ﹤0.01% 2331
2025
Q2 		$1.14M Sell
21,593
-86,906
-80% -$4.08M ﹤0.01% 4308
2025
Q1 		$5.39M Buy
108,499
+100,620
+1,277% +$5.59M ﹤0.01% 2788
2024
Q4 		$500K Buy
+7,879
New +$456K ﹤0.01% 4751
2024
Q1 		– Sell
-20,697
Closed -$1.34M – 6412
2023
Q4 		$1.2M Buy
+20,697
New +$1.06M ﹤0.01% 4012
2023
Q2 		– Sell
-22,107
Closed -$468K – 6386
2023
Q1 		$468K Buy
22,107
+7,346
+50% +$164K ﹤0.01% 4649
2022
Q4 		$294K Buy
14,761
+3,343
+29% +$166K ﹤0.01% 5122
2022
Q3 		$562K Sell
11,418
-13,987
-55% -$660K ﹤0.01% 4861
2022
Q2 		$1.29M Buy
25,405
+7,532
+42% +$333K ﹤0.01% 4141
2022
Q1 		$745K Buy
17,873
+962
+6% +$50.4K ﹤0.01% 4796
2021
Q4 		$1.48M Sell
16,911
-2,913
-15% -$285K ﹤0.01% 4049
2021
Q3 		$2.4M Buy
19,824
+11,299
+133% +$1.54M ﹤0.01% 3697
2021
Q2 		$1.66M Sell
8,525
-2,476
-23% -$814K ﹤0.01% 4178
2021
Q1 		$4.47M Buy
+11,001
New +$4.91M ﹤0.01% 2699

Other funds holding IRON

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return

Millennium Management's IRON Position: Q1 2026 in Review

Millennium Management reduced its Disc Medicine (IRON) stake by 55% in Q1 2026, selling an estimated $7.05M and leaving 83,259 shares worth $5.32M. The position accounts for ﹤0.01% of the portfolio, ranked #2866.

Millennium Management first reported a position in IRON in Q1 2021 and has held it in 16 quarters since. The position peaked at $14.7M in Q4 2025. 203 funds tracked by Wall St. Rank hold IRON as of Q1 2026.

  • Millennium Management held 83,259 shares of Disc Medicine worth $5.32M as of Q1 2026.
  • Millennium Management sold 101,520 Disc Medicine shares in Q1 2026, an estimated $7.05M.
  • Disc Medicine made up ﹤0.01% of Millennium Management's portfolio in Q1 2026, its #2866 holding.
  • Millennium Management first reported a position in Disc Medicine in Q1 2021 and has held it in 16 quarters since.
  • Millennium Management's Disc Medicine position peaked at $14.7M in Q4 2025.
  • 203 funds tracked by Wall St. Rank held Disc Medicine as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.