Blue Owl Capital Holdings’s Disc Medicine IRON Stock Holding History

Blue Owl Capital Holdings’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	-102,260	Closed	-$6.76M	–	82
2025 Q3	$6.76M	Sell	102,260 -20,000	-16%	-$1.19M	2.1%	17
2025 Q2	$6.47M	Sell	122,260 -18,000	-13%	-$845K	2.09%	14
2025 Q1	$6.96M	Buy	140,260 +20,000	+17%	+$1.11M	2.25%	12
2024 Q4	$7.62M	Sell	120,260 -55,000	-31%	-$3.18M	1.76%	15
2024 Q3	$8.61M	Sell	175,260 -40,000	-19%	-$1.88M	1.66%	16
2024 Q2	$9.7M	Buy	215,260 +60,000	+39%	+$2.04M	2.7%	13
2024 Q1	$9.67M	Buy	155,260 +15,000	+11%	+$973K	1.93%	15
2023 Q4	$8.1M	Buy	+140,260	New	+$7.18M	1.94%	14

Other funds holding IRON

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

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

RCM

RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

AVLSA

Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return

FLSM

Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Blue Owl Capital Holdings's IRON Position: Q4 2025 in Review

Blue Owl Capital Holdings sold out of Disc Medicine (IRON) in Q4 2025, closing a stake of 102,260 shares — an estimated $6.76M sold.

Blue Owl Capital Holdings first reported a position in IRON in Q4 2023 and held it in 8 quarters. The position peaked at $9.7M in Q2 2024. 196 funds tracked by Wall St. Rank hold IRON as of Q4 2025.

Blue Owl Capital Holdings reported no remaining Disc Medicine position as of Q4 2025 after selling out during the quarter.
Blue Owl Capital Holdings sold 102,260 Disc Medicine shares in Q4 2025, an estimated $6.76M.
Blue Owl Capital Holdings first reported a position in Disc Medicine in Q4 2023 and held it in 8 quarters.
Blue Owl Capital Holdings's Disc Medicine position peaked at $9.7M in Q2 2024.
196 funds tracked by Wall St. Rank held Disc Medicine as of Q4 2025.

Based on Blue Owl Capital Holdings's 13F filing for Q4 2025, filed 9 Feb 2026.