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UBS O'Connor’s Disc Medicine IRON Stock Holding History

UBS O'Connor’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
2025
Q3 		– Sell
-12,317
Closed -$652K – 371
2025
Q2 		$652K Sell
12,317
-1,304
-10% -$61.3K 0.02% 259
2025
Q1 		$676K Sell
13,621
-636
-4% -$35.4K 0.02% 210
2024
Q4 		$904K Sell
14,257
-426
-3% -$24.6K 0.02% 238
2024
Q3 		$722K Buy
14,683
+1,364
+10% +$64K 0.02% 311
2024
Q2 		$600K Buy
13,319
+10,000
+301% +$340K 0.02% 355
2024
Q1 		$207K Sell
3,319
-6,019
-64% -$390K 0.01% 400
2023
Q4 		$539K Sell
9,338
-13,783
-60% -$706K 0.02% 342
2023
Q3 		$1.09M Buy
23,121
+6,000
+35% +$300K 0.02% 324
2023
Q2 		$760K Sell
17,121
-28,629
-63% -$1.02M 0.02% 408
2023
Q1 		$969K Buy
+45,750
New +$1.02M 0.02% 407

Other funds holding IRON

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return
O
OrbiMed New York $5.4B AUM 163.13% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

UBS O'Connor's IRON Position: Q3 2025 in Review

UBS O'Connor sold out of Disc Medicine (IRON) in Q3 2025, closing a stake of 12,317 shares — an estimated $652K sold.

UBS O'Connor first reported a position in IRON in Q1 2023 and held it in 10 quarters. The position peaked at $1.09M in Q3 2023. 168 funds tracked by Wall St. Rank hold IRON as of Q3 2025.

  • UBS O'Connor reported no remaining Disc Medicine position as of Q3 2025 after selling out during the quarter.
  • UBS O'Connor sold 12,317 Disc Medicine shares in Q3 2025, an estimated $652K.
  • UBS O'Connor first reported a position in Disc Medicine in Q1 2023 and held it in 10 quarters.
  • UBS O'Connor's Disc Medicine position peaked at $1.09M in Q3 2023.
  • 168 funds tracked by Wall St. Rank held Disc Medicine as of Q3 2025.

Based on UBS O'Connor's 13F filing for Q3 2025, filed 14 Nov 2025.