Group One Trading’s Disc Medicine IRON Stock Holding History

Group One 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 Q1	–	Sell	-3,000	Closed	-$190K	–	7951
2024 Q4	$190K	Buy	3,000 +1,500	+100%	+$86.8K	﹤0.01%	3972
2024 Q3	$73.7K	Hold	1,500	–	–	﹤0.01%	4397
2024 Q2	$67.6K	Sell	1,500 -5,700	-79%	-$194K	﹤0.01%	4282
2024 Q1	$448K	Buy	7,200 +5,900	+454%	+$383K	﹤0.01%	2844
2023 Q4	$75.1K	Buy	+1,300	New	+$66.6K	﹤0.01%	4715
2023 Q3	–	Sell	-100	Closed	-$4.44K	–	7950
2023 Q2	$4.44K	Buy	+100	New	+$3.55K	﹤0.01%	6771
2023 Q1	–	Sell	-83,700	Closed	-$1.66M	–	7548
2022 Q4	$1.66M	Buy	83,700 +80,473	+2,494%	+$4.01M	﹤0.01%	1981
2022 Q3	$159K	Buy	3,227 +1,517	+89%	+$71.6K	﹤0.01%	4362
2022 Q2	$87K	Buy	+1,710	New	+$75.6K	﹤0.01%	5112
2022 Q1	–	Sell	-20	Closed	-$2K	–	8331
2021 Q4	$2K	Sell	20 -90	-82%	-$8.82K	﹤0.01%	7884
2021 Q3	$13K	Sell	110 -307	-74%	-$42K	﹤0.01%	7386
2021 Q2	$81K	Buy	417 +270	+184%	+$88.8K	﹤0.01%	6164
2021 Q1	$60K	Buy	+147	New	+$65.6K	﹤0.01%	6090

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

Group One Trading's IRON Position: Q1 2026 in Review

Group One Trading opened a new position in Disc Medicine (IRON) in Q1 2026: 11 shares worth $703. The stake represents ﹤0.01% of the portfolio and ranks #7272 among its holdings. This is a return to the name: Group One Trading previously reported a position in IRON as recently as Q4 2024.

Group One Trading first reported a position in IRON in Q1 2021 and has held it in 9 quarters since. The position peaked at $271K in Q1 2021. 203 funds tracked by Wall St. Rank hold IRON as of Q1 2026.

Group One Trading held 11 shares of Disc Medicine worth $703 as of Q1 2026.
Disc Medicine was a new Group One Trading position in Q1 2026.
Disc Medicine made up ﹤0.01% of Group One Trading's portfolio in Q1 2026, its #7272 holding.
Group One Trading first reported a position in Disc Medicine in Q1 2021 and has held it in 9 quarters since.
Group One Trading's Disc Medicine position peaked at $271K in Q1 2021.
203 funds tracked by Wall St. Rank held Disc Medicine as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.