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RA Capital Management’s Disc Medicine IRON Stock Holding History

RA Capital 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
Q2 		$179M Hold
2,450,221
– – 1.56% 14
2026
Q1 		$157M Buy
2,450,221
+474,089
+24% +$32.9M 1.66% 14
2025
Q4 		$157M Buy
1,976,132
+399,026
+25% +$33.7M 1.61% 14
2025
Q3 		$104M Hold
1,577,106
– – 1.28% 22
2025
Q2 		$83.5M Hold
1,577,106
– – 1.41% 19
2025
Q1 		$78.3M Buy
+1,577,106
New +$87.7M 1.31% 20

Other funds holding IRON

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
State Street
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
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return

RA Capital Management's IRON Position: Q2 2026 in Review

RA Capital Management held its Disc Medicine (IRON) position steady in Q2 2026 at 2,450,221 shares worth $179M. The position accounts for 1.56% of the portfolio, ranked #14.

RA Capital Management first reported a position in IRON in Q1 2025 and has held it in 6 quarters since. 216 funds tracked by Wall St. Rank hold IRON as of Q2 2026.

  • RA Capital Management held 2,450,221 shares of Disc Medicine worth $179M as of Q2 2026.
  • RA Capital Management left its Disc Medicine share count unchanged in Q2 2026.
  • Disc Medicine made up 1.56% of RA Capital Management's portfolio in Q2 2026, its #14 holding.
  • RA Capital Management first reported a position in Disc Medicine in Q1 2025 and has held it in 6 quarters since.
  • 216 funds tracked by Wall St. Rank held Disc Medicine as of Q2 2026.

Based on RA Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.