XT
YMAB

XTX Topco’s Y-mAbs Therapeutics YMAB Stock Holding History

XTX Topco’s Portfolio YMAB Stock Details YMAB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-86,440
Closed -$390K – 3400
2025
Q2 		$390K Sell
86,440
-5,014
-5% -$22.5K 0.02% 1274
2025
Q1 		$405K Buy
91,454
+70,686
+340% +$410K 0.02% 1183
2024
Q4 		$163K Buy
20,768
+9,468
+84% +$115K 0.01% 1633
2024
Q3 		$149K Sell
11,300
-13,321
-54% -$169K 0.01% 1528
2024
Q2 		$297K Buy
+24,621
New +$332K 0.03% 971
2023
Q4 		– Sell
-31,690
Closed -$173K – 2229
2023
Q3 		$173K Sell
31,690
-13,571
-30% -$79K 0.03% 1064
2023
Q2 		$307K Sell
45,261
-118,016
-72% -$884K 0.06% 700
2023
Q1 		$818K Buy
163,277
+124,703
+323% +$509K 0.17% 89
2022
Q4 		$188K Buy
+38,574
New +$280K 0.04% 869
2021
Q2 		– Sell
-8,036
Closed -$243K – 1135
2021
Q1 		$243K Buy
+8,036
New +$329K 0.12% 397

Other funds holding YMAB

BIG
Brooklyn Investment Group Brooklyn, New York $3.2B AUM 26.32% 1-Year Est. Return
IA
IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

XTX Topco's YMAB Position: Q3 2025 in Review

XTX Topco sold out of Y-mAbs Therapeutics (YMAB) in Q3 2025, closing a stake of 86,440 shares — an estimated $390K sold.

XTX Topco first reported a position in YMAB in Q1 2021 and held it in 10 quarters. The position peaked at $818K in Q1 2023. 2 funds tracked by Wall St. Rank hold YMAB as of Q3 2025.

  • XTX Topco reported no remaining Y-mAbs Therapeutics position as of Q3 2025 after selling out during the quarter.
  • XTX Topco sold 86,440 Y-mAbs Therapeutics shares in Q3 2025, an estimated $390K.
  • XTX Topco first reported a position in Y-mAbs Therapeutics in Q1 2021 and held it in 10 quarters.
  • XTX Topco's Y-mAbs Therapeutics position peaked at $818K in Q1 2023.
  • 2 funds tracked by Wall St. Rank held Y-mAbs Therapeutics as of Q3 2025.

Based on XTX Topco's 13F filing for Q3 2025, filed 14 Nov 2025.