Simplex Trading
IRON icon

Simplex Trading’s Disc Medicine IRON Stock Holding History

Simplex Trading’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 		$595K Buy
9,300
+9,100
+4,550% +$632K ﹤0.01% 3072
2025
Q4 		$15.9K Buy
200
+100
+100% +$8.45K ﹤0.01% 6673
2025
Q3 		$6K Hold
100
– – ﹤0.01% 8197
2025
Q2 		$5K Sell
100
-300
-75% -$14.1K ﹤0.01% 7743
2025
Q1 		$19K Sell
400
-700
-64% -$38.9K ﹤0.01% 6614
2024
Q4 		$69K Buy
+1,100
New +$63.6K ﹤0.01% 5536
2024
Q3 		– Sell
-600
Closed -$27K – 8993
2024
Q2 		$27K Sell
600
-5,100
-89% -$173K ﹤0.01% 6640
2024
Q1 		$354K Buy
5,700
+4,600
+418% +$298K ﹤0.01% 4207
2023
Q4 		$63K Sell
1,100
-13,400
-92% -$686K ﹤0.01% 5861
2023
Q3 		$681K Buy
14,500
+14,000
+2,800% +$700K ﹤0.01% 3062
2023
Q2 		$22K Buy
+500
New +$17.7K ﹤0.01% 6673
2022
Q4 		– Sell
-150
Closed -$7K – 9749
2022
Q3 		$7K Buy
+150
New +$7.08K ﹤0.01% 8536
2022
Q1 		– Sell
-73
Closed -$6K – 10873
2021
Q4 		$6K Sell
73
-300
-80% -$29.4K ﹤0.01% 9410
2021
Q3 		$70K Buy
373
+83
+29% +$11.3K ﹤0.01% 7084
2021
Q2 		$56K Buy
+290
New +$95.4K ﹤0.01% 7509
2021
Q1 		– Hold
0
– – – 7622

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

Simplex Trading's IRON Position: Q4 2025 in Review

Simplex Trading sold out of Disc Medicine (IRON) in Q4 2025, closing a stake of 800 shares — an estimated $67.6K sold.

Simplex Trading first reported a position in IRON in Q1 2021 and held it in 12 quarters. The position peaked at $680K in Q1 2021. 196 funds tracked by Wall St. Rank hold IRON as of Q4 2025.

  • Simplex Trading reported no remaining Disc Medicine position as of Q4 2025 after selling out during the quarter.
  • Simplex Trading sold 800 Disc Medicine shares in Q4 2025, an estimated $67.6K.
  • Simplex Trading first reported a position in Disc Medicine in Q1 2021 and held it in 12 quarters.
  • Simplex Trading's Disc Medicine position peaked at $680K in Q1 2021.
  • 196 funds tracked by Wall St. Rank held Disc Medicine as of Q4 2025.

Based on Simplex Trading's 13F filing for Q4 2025, filed 11 Feb 2026.