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
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

VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
VFT
Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
SAMU
SONA Asset Management (US) New York $4.74B AUM 11.18% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return

XTX Topco's QMCO Position: Q1 2026 in Review

XTX Topco reduced its Quantum Corp (QMCO) stake by 5.2% in Q1 2026, selling an estimated $3.78K and leaving 11,321 shares worth $53.8K. The position accounts for ﹤0.01% of the portfolio, ranked #3296.

XTX Topco first reported a position in QMCO in Q4 2023 and has held it in 4 quarters since. The position peaked at $77.1K in Q4 2025. 37 funds tracked by Wall St. Rank hold QMCO as of Q1 2026.

  • XTX Topco held 11,321 shares of Quantum Corp worth $53.8K as of Q1 2026.
  • XTX Topco sold 627 Quantum Corp shares in Q1 2026, an estimated $3.78K.
  • Quantum Corp made up ﹤0.01% of XTX Topco's portfolio in Q1 2026, its #3296 holding.
  • XTX Topco first reported a position in Quantum Corp in Q4 2023 and has held it in 4 quarters since.
  • XTX Topco's Quantum Corp position peaked at $77.1K in Q4 2025.
  • 37 funds tracked by Wall St. Rank held Quantum Corp as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.