Jim Simons
IRON icon

Jim Simons’s Disc Medicine IRON Stock Holding History

Jim Simons’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 		– Sell
-31,820
Closed -$2.03M – 3412
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

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
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
SL
Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return

Jim Simons's IRON Position: Q2 2026 in Review

Jim Simons sold out of Disc Medicine (IRON) in Q2 2026, closing a stake of 31,820 shares — an estimated $2.03M sold.

Jim Simons first reported a position in IRON in Q4 2021 and held it in 16 quarters. The position peaked at $9.49M in Q1 2025. 124 funds tracked by Wall St. Rank hold IRON as of Q2 2026.

  • Jim Simons reported no remaining Disc Medicine position as of Q2 2026 after selling out during the quarter.
  • Jim Simons sold 31,820 Disc Medicine shares in Q2 2026, an estimated $2.03M.
  • Jim Simons first reported a position in Disc Medicine in Q4 2021 and held it in 16 quarters.
  • Jim Simons's Disc Medicine position peaked at $9.49M in Q1 2025.
  • 124 funds tracked by Wall St. Rank held Disc Medicine as of Q2 2026.

Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.