Renaissance Technologies
IRON icon

Renaissance Technologies’s Disc Medicine IRON Stock Holding History

Renaissance Technologies’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 		$2.03M Sell
31,820
-31,000
-49% -$2.15M ﹤0.01% 1883
2025
Q4 		$4.99M Buy
62,820
+56,020
+824% +$4.73M 0.01% 1305
2025
Q3 		$449K Sell
6,800
-89,620
-93% -$5.33M ﹤0.01% 2844
2025
Q2 		$5.11M Sell
96,420
-94,800
-50% -$4.45M 0.01% 1512
2025
Q1 		$9.49M Buy
191,220
+104,800
+121% +$5.83M 0.01% 1028
2024
Q4 		$5.48M Buy
+86,420
New +$5M 0.01% 1393
2024
Q2 		– Sell
-8,520
Closed -$530K – 3729
2024
Q1 		$530K Sell
8,520
-39,760
-82% -$2.58M ﹤0.01% 2838
2023
Q4 		$2.79M Buy
48,280
+18,590
+63% +$952K ﹤0.01% 1732
2023
Q3 		$1.4M Sell
29,690
-39,200
-57% -$1.96M ﹤0.01% 2085
2023
Q2 		$3.06M Buy
68,890
+53,620
+351% +$1.9M ﹤0.01% 1729
2023
Q1 		$324K Buy
15,270
+2,300
+18% +$51.2K ﹤0.01% 3078
2022
Q4 		$258K Buy
12,970
+6,975
+116% +$347K ﹤0.01% 3300
2022
Q3 		$295K Sell
5,995
-3,358
-36% -$158K ﹤0.01% 3220
2022
Q2 		$474K Sell
9,353
-2,350
-20% -$104K ﹤0.01% 3194
2022
Q1 		$488K Buy
11,703
+11,306
+2,848% +$593K ﹤0.01% 3215
2021
Q4 		$35K Buy
+397
New +$38.9K ﹤0.01% 3810

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

Renaissance Technologies's IRON Position: Q1 2026 in Review

Renaissance Technologies reduced its Disc Medicine (IRON) stake by 49% in Q1 2026, selling an estimated $2.15M and leaving 31,820 shares worth $2.03M. The position accounts for ﹤0.01% of the portfolio, ranked #1883.

Renaissance Technologies first reported a position in IRON in Q4 2021 and has held it in 16 quarters since. The position peaked at $9.49M in Q1 2025. 203 funds tracked by Wall St. Rank hold IRON as of Q1 2026.

  • Renaissance Technologies held 31,820 shares of Disc Medicine worth $2.03M as of Q1 2026.
  • Renaissance Technologies sold 31,000 Disc Medicine shares in Q1 2026, an estimated $2.15M.
  • Disc Medicine made up ﹤0.01% of Renaissance Technologies's portfolio in Q1 2026, its #1883 holding.
  • Renaissance Technologies first reported a position in Disc Medicine in Q4 2021 and has held it in 16 quarters since.
  • Renaissance Technologies's Disc Medicine position peaked at $9.49M in Q1 2025.
  • 203 funds tracked by Wall St. Rank held Disc Medicine as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.