Checkpoint Capital’s Disc Medicine IRON Stock Holding History

Checkpoint Capital’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	$18.3M	Sell	286,661 -166,331	-37%	-$11.5M	6.58%	4
2025 Q4	$36M	Buy	452,992 +22,992	+5%	+$1.94M	11.24%	3
2025 Q3	$28.4M	Buy	430,000 +165,000	+62%	+$9.82M	9.52%	4
2025 Q2	$14M	Buy	265,000 +21,689	+9%	+$1.02M	6.54%	4
2025 Q1	$12.1M	Buy	243,311 +58,311	+32%	+$3.24M	6.63%	5
2024 Q4	$11.7M	Buy	185,000 +159,457	+624%	+$9.22M	5.97%	5
2024 Q3	$1.26M	Buy	+25,543	New	+$1.2M	0.62%	14
2024 Q1	–	Sell	-10,000	Closed	-$578K	–	20
2023 Q4	$578K	Buy	+10,000	New	+$512K	0.35%	17

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 $6.73T AUM 46.02% 1-Year Est. Return

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

State Street Boston, Massachusetts $3.37T AUM 44.26% 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

Checkpoint Capital's IRON Position: Q1 2026 in Review

Checkpoint Capital reduced its Disc Medicine (IRON) stake by 37% in Q1 2026, selling an estimated $11.5M and leaving 286,661 shares worth $18.3M. The position accounts for 6.58% of the portfolio, ranked #4.

Checkpoint Capital first reported a position in IRON in Q4 2023 and has held it in 8 quarters since. The position peaked at $36M in Q4 2025. 203 funds tracked by Wall St. Rank hold IRON as of Q1 2026.

Checkpoint Capital held 286,661 shares of Disc Medicine worth $18.3M as of Q1 2026.
Checkpoint Capital sold 166,331 Disc Medicine shares in Q1 2026, an estimated $11.5M.
Disc Medicine made up 6.58% of Checkpoint Capital's portfolio in Q1 2026, its #4 holding.
Checkpoint Capital first reported a position in Disc Medicine in Q4 2023 and has held it in 8 quarters since.
Checkpoint Capital's Disc Medicine position peaked at $36M in Q4 2025.
203 funds tracked by Wall St. Rank held Disc Medicine as of Q1 2026.

Based on Checkpoint Capital's 13F filing for Q1 2026, filed 15 May 2026.