Sphera Funds Management’s Disc Medicine IRON Stock Holding History

Sphera Funds Management’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	$3.42M	Buy	+53,538	New	+$3.72M	0.54%	62
2024 Q3	–	Sell	-58,044	Closed	-$2.62M	–	128
2024 Q2	$2.62M	Buy	58,044 +9,158	+19%	+$311K	0.36%	78
2024 Q1	$3.04M	Buy	+48,886	New	+$3.17M	0.43%	63
2023 Q4	–	Sell	-111,398	Closed	-$5.23M	–	101
2023 Q3	$5.23M	Sell	111,398 -59,180	-35%	-$2.96M	0.95%	36
2023 Q2	$7.57M	Sell	170,578 -49,435	-22%	-$1.75M	1.18%	25
2023 Q1	$4.66M	Buy	+220,013	New	+$4.9M	0.78%	46

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

Sphera Funds Management's IRON Position: Q1 2026 in Review

Sphera Funds Management opened a new position in Disc Medicine (IRON) in Q1 2026: 53,538 shares worth $3.42M. The stake represents 0.54% of the portfolio and ranks #62 among its holdings. This is a return to the name: Sphera Funds Management previously reported a position in IRON as recently as Q2 2024.

Sphera Funds Management first reported a position in IRON in Q1 2023 and has held it in 6 quarters since. The position peaked at $7.57M in Q2 2023. 203 funds tracked by Wall St. Rank hold IRON as of Q1 2026.

Sphera Funds Management held 53,538 shares of Disc Medicine worth $3.42M as of Q1 2026.
Disc Medicine was a new Sphera Funds Management position in Q1 2026.
Disc Medicine made up 0.54% of Sphera Funds Management's portfolio in Q1 2026, its #62 holding.
Sphera Funds Management first reported a position in Disc Medicine in Q1 2023 and has held it in 6 quarters since.
Sphera Funds Management's Disc Medicine position peaked at $7.57M in Q2 2023.
203 funds tracked by Wall St. Rank held Disc Medicine as of Q1 2026.

Based on Sphera Funds Management's 13F filing for Q1 2026, filed 15 May 2026.