State of Wisconsin Investment Board’s Disc Medicine IRON Stock Holding History

State of Wisconsin Investment Board’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	$1.13M	Buy	15,429 +1,141	+8%	+$78.4K	﹤0.01%	1724
2026 Q1	$914K	Sell	14,288 -2,818	-16%	-$196K	﹤0.01%	1731
2025 Q4	$1.36M	Buy	17,106 +4,733	+38%	+$400K	﹤0.01%	1546
2025 Q3	$818K	Sell	12,373 -516	-4%	-$30.7K	﹤0.01%	1688
2025 Q2	$683K	Buy	12,889 +906	+8%	+$42.6K	﹤0.01%	1729
2025 Q1	$595K	Sell	11,983 -230	-2%	-$12.8K	﹤0.01%	1683
2024 Q4	$774K	Sell	12,213 -156	-1%	-$9.02K	﹤0.01%	1619
2024 Q3	$608K	Sell	12,369 -2,609	-17%	-$122K	﹤0.01%	1785
2024 Q2	$675K	Buy	14,978 +6,077	+68%	+$207K	﹤0.01%	1693
2024 Q1	$554K	Buy	8,901 +2,139	+32%	+$139K	﹤0.01%	1690
2023 Q4	$391K	Sell	6,762 -1,409	-17%	-$72.1K	﹤0.01%	1895
2023 Q3	$384K	Buy	+8,171	New	+$409K	﹤0.01%	1938

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

State of Wisconsin Investment Board's IRON Position: Q2 2026 in Review

State of Wisconsin Investment Board increased its Disc Medicine (IRON) stake by 8% in Q2 2026, buying an estimated $78.4K and bringing the position to 15,429 shares worth $1.13M. The position accounts for ﹤0.01% of the portfolio, ranked #1724.

State of Wisconsin Investment Board first reported a position in IRON in Q3 2023 and has held it in 12 quarters since. The position peaked at $1.36M in Q4 2025. 215 funds tracked by Wall St. Rank hold IRON as of Q2 2026.

State of Wisconsin Investment Board held 15,429 shares of Disc Medicine worth $1.13M as of Q2 2026.
State of Wisconsin Investment Board bought 1,141 Disc Medicine shares in Q2 2026, an estimated $78.4K.
Disc Medicine made up ﹤0.01% of State of Wisconsin Investment Board's portfolio in Q2 2026, its #1724 holding.
State of Wisconsin Investment Board first reported a position in Disc Medicine in Q3 2023 and has held it in 12 quarters since.
State of Wisconsin Investment Board's Disc Medicine position peaked at $1.36M in Q4 2025.
215 funds tracked by Wall St. Rank held Disc Medicine as of Q2 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q2 2026, filed 14 Aug 2026.