Zimmer Partners’s Disc Medicine IRON Stock Holding History

Zimmer Partners’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 Q2	–	Sell	-16,700	Closed	-$1.07M	–	135
2026 Q1	$1.07M	Sell	16,700 -10,800	-39%	-$749K	0.03%	117
2025 Q4	$2.18M	Sell	27,500 -62,663	-69%	-$5.29M	0.06%	93
2025 Q3	$5.96M	Hold	90,163	–	–	0.13%	95
2025 Q2	$4.78M	Buy	90,163 +47,263	+110%	+$2.22M	0.1%	112
2025 Q1	$2.13M	Buy	42,900 +9,800	+30%	+$545K	0.04%	151
2024 Q4	$2.1M	Sell	33,100 -1,300	-4%	-$75.2K	0.04%	131
2024 Q3	$1.69M	Hold	34,400	–	–	0.03%	135
2024 Q2	$1.55M	Buy	+34,400	New	+$1.17M	0.03%	132

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

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

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

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

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

VPC

Vestal Point Capital New York $4.28B AUM 239% 1-Year Est. Return

AVLSA

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

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Zimmer Partners's IRON Position: Q2 2026 in Review

Zimmer Partners sold out of Disc Medicine (IRON) in Q2 2026, closing a stake of 16,700 shares — an estimated $1.07M sold.

Zimmer Partners first reported a position in IRON in Q2 2024 and held it in 8 quarters. The position peaked at $5.96M in Q3 2025. 217 funds tracked by Wall St. Rank hold IRON as of Q2 2026.

Zimmer Partners reported no remaining Disc Medicine position as of Q2 2026 after selling out during the quarter.
Zimmer Partners sold 16,700 Disc Medicine shares in Q2 2026, an estimated $1.07M.
Zimmer Partners first reported a position in Disc Medicine in Q2 2024 and held it in 8 quarters.
Zimmer Partners's Disc Medicine position peaked at $5.96M in Q3 2025.
217 funds tracked by Wall St. Rank held Disc Medicine as of Q2 2026.

Based on Zimmer Partners's 13F filing for Q2 2026, filed 14 Aug 2026.