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Baker Bros. Advisors’s Disc Medicine IRON Stock Holding History

Baker Bros. Advisors’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 		$22.4M Buy
349,657
+12,607
+4% +$875K 0.13% 48
2025
Q4 		$26.8M Hold
337,050
– – 0.16% 45
2025
Q3 		$22.3M Hold
337,050
– – 0.16% 45
2025
Q2 		$17.9M Buy
337,050
+260,000
+337% +$12.2M 0.17% 41
2025
Q1 		$3.82M Hold
77,050
– – 0.04% 65
2024
Q4 		$4.88M Buy
+77,050
New +$4.46M 0.05% 68

Other funds holding IRON

Fidelity Investments
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
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
T. Rowe Price Associates
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

Baker Bros. Advisors's IRON Position: Q1 2026 in Review

Baker Bros. Advisors increased its Disc Medicine (IRON) stake by 3.7% in Q1 2026, buying an estimated $875K and bringing the position to 349,657 shares worth $22.4M. The position accounts for 0.13% of the portfolio, ranked #48.

Baker Bros. Advisors first reported a position in IRON in Q4 2024 and has held it in 6 quarters since. The position peaked at $26.8M in Q4 2025. 203 funds tracked by Wall St. Rank hold IRON as of Q1 2026.

  • Baker Bros. Advisors held 349,657 shares of Disc Medicine worth $22.4M as of Q1 2026.
  • Baker Bros. Advisors bought 12,607 Disc Medicine shares in Q1 2026, an estimated $875K.
  • Disc Medicine made up 0.13% of Baker Bros. Advisors's portfolio in Q1 2026, its #48 holding.
  • Baker Bros. Advisors first reported a position in Disc Medicine in Q4 2024 and has held it in 6 quarters since.
  • Baker Bros. Advisors's Disc Medicine position peaked at $26.8M in Q4 2025.
  • 203 funds tracked by Wall St. Rank held Disc Medicine as of Q1 2026.

Based on Baker Bros. Advisors's 13F filing for Q1 2026, filed 15 May 2026.