XT
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XTX Topco’s Quantum Corp QMCO Stock Holding History

XTX Topco’s Portfolio QMCO Stock Details QMCO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-11,321
Closed -$53.8K – 4604
2026
Q1 		$53.8K Sell
11,321
-627
-5% -$3.78K ﹤0.01% 3296
2025
Q4 		$77.1K Buy
+11,948
New +$107K ﹤0.01% 2713
2024
Q2 		– Sell
-1,566
Closed -$18.6K – 2362
2024
Q1 		$18.6K Buy
1,566
+465
+42% +$4.17K ﹤0.01% 1617
2023
Q4 		$7.69K Buy
+1,101
New +$9.29K ﹤0.01% 1452

Other funds holding QMCO

Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
TSC
Two Seas Capital Rye, New York $5.05B AUM 164.99% 1-Year Est. Return
OCM
Oaktree Capital Management Los Angeles, California $7.21B AUM 45.97% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
PCM
Portolan Capital Management Boston, Massachusetts $2.67B AUM 169.09% 1-Year Est. Return
ACM
Ashford Capital Management Wilmington, Delaware $933M AUM 56.2% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
MHP
Manatuck Hill Partners Westport, Connecticut $302M AUM 117.41% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

XTX Topco's QMCO Position: Q2 2026 in Review

XTX Topco sold out of Quantum Corp (QMCO) in Q2 2026, closing a stake of 11,321 shares — an estimated $53.8K sold.

XTX Topco first reported a position in QMCO in Q4 2023 and held it in 4 quarters. The position peaked at $77.1K in Q4 2025. 60 funds tracked by Wall St. Rank hold QMCO as of Q2 2026.

  • XTX Topco reported no remaining Quantum Corp position as of Q2 2026 after selling out during the quarter.
  • XTX Topco sold 11,321 Quantum Corp shares in Q2 2026, an estimated $53.8K.
  • XTX Topco first reported a position in Quantum Corp in Q4 2023 and held it in 4 quarters.
  • XTX Topco's Quantum Corp position peaked at $77.1K in Q4 2025.
  • 60 funds tracked by Wall St. Rank held Quantum Corp as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.