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
2025 Q4	–	Sell	-800	Closed	-$67.6K	–	9275
2025 Q3	$52K	Buy	800 +601	+302%	+$35.8K	﹤0.01%	6416
2025 Q2	$10K	Sell	199 -1,641	-89%	-$77.1K	﹤0.01%	7313
2025 Q1	$91K	Buy	+1,840	New	+$102K	﹤0.01%	5152
2024 Q4	–	Sell	-81	Closed	-$4.68K	–	9055
2024 Q3	$3K	Sell	81 -751	-90%	-$35.3K	﹤0.01%	7847
2024 Q2	$37K	Buy	+832	New	+$28.3K	﹤0.01%	6366
2023 Q3	–	Sell	-22	Closed	-$1.1K	–	9194
2023 Q2	$0	Buy	+22	New	+$781	﹤0.01%	9433
2022 Q4	–	Sell	-417	Closed	-$20K	–	9750
2022 Q3	$20K	Buy	417 +400	+2,353%	+$18.9K	﹤0.01%	7522
2022 Q2	$0	Buy	+17	New	+$752	﹤0.01%	10480
2022 Q1	–	Sell	-514	Closed	-$26.9K	–	10874
2021 Q4	$44K	Buy	514 +479	+1,369%	+$46.9K	﹤0.01%	7425
2021 Q3	$6K	Hold	35	–	–	﹤0.01%	9200
2021 Q2	$6K	Sell	35 -1,639	-98%	-$539K	﹤0.01%	9374
2021 Q1	$680K	Buy	+1,674	New	+$747K	﹤0.01%	2915

Other funds holding IRON

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 New York $5.72T AUM 30.48% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

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.