Jane Street
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Jane Street’s Quantum Corp QMCO Stock Holding History

Jane Street’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
Q3 		$702K Buy
+22,128
New +$412K ﹤0.01% 7233
2025
Q1 		– Sell
-33,612
Closed -$1.81M – 10393
2024
Q4 		$1.81M Buy
+33,612
New +$488K ﹤0.01% 4292
2024
Q3 		– Sell
-2,307
Closed -$18.9K – 10258
2024
Q2 		$18.9K Buy
2,307
+1,686
+271% +$16.2K ﹤0.01% 9046
2024
Q1 		$7.4K Sell
621
-298
-32% -$2.67K ﹤0.01% 8985
2023
Q4 		$6.42K Sell
919
-86
-9% -$725 ﹤0.01% 9002
2023
Q3 		$12.3K Buy
+1,005
New +$16.6K ﹤0.01% 8365
2023
Q2 		– Sell
-2,389
Closed -$55K – 9411
2023
Q1 		$55K Buy
+2,389
New +$62.4K ﹤0.01% 8423
2020
Q4 		– Sell
-1,296
Closed -$119K – 7991
2020
Q3 		$119K Sell
1,296
-2,484
-66% -$242K ﹤0.01% 6699
2020
Q2 		$291K Buy
3,780
+2,602
+221% +$206K ﹤0.01% 5887
2020
Q1 		$69K Buy
+1,178
New +$106K ﹤0.01% 5039
2019
Q1 		– Sell
-1,195
Closed -$48K – 5509
2018
Q4 		$48K Buy
+1,195
New +$54.9K ﹤0.01% 4731
2018
Q3 		– Sell
-5,520
Closed -$243K – 5598
2018
Q2 		$243K Buy
+5,520
New +$370K ﹤0.01% 4348
2017
Q4 		– Sell
-1,198
Closed -$147K – 5072
2017
Q3 		$147K Buy
+1,198
New +$161K ﹤0.01% 4210
2015
Q1 		– Sell
-99
Closed -$28K – 3411
2014
Q4 		$28K Buy
+99
New +$22.7K ﹤0.01% 2401
2013
Q4 		– Sell
-223
Closed -$49K – 2791
2013
Q3 		$49K Sell
223
-43
-16% -$10.5K ﹤0.01% 2605
2013
Q2 		$58K Buy
+266
New +$59.4K ﹤0.01% 2518

Other funds holding QMCO

Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return
Two Seas Capital
Two Seas Capital Rye, New York $8.68B AUM 78.08% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $123B AUM 30.05% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $114B AUM 35.47% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $148B AUM 31.56% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $765B AUM 28.39% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $73.4B AUM 32.8% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return

Jane Street's QMCO Position: Q3 2026 in Review

Jane Street opened a new position in Quantum Corp (QMCO) in Q3 2026: 22,128 shares worth $702K. The stake represents ﹤0.01% of the portfolio and ranks #7233 among its holdings. This is a return to the name: Jane Street previously reported a position in QMCO as recently as Q4 2024.

Jane Street first reported a position in QMCO in Q2 2013 and has held it in 16 quarters since. The position peaked at $1.81M in Q4 2024. 70 funds tracked by Wall St. Rank hold QMCO as of Q3 2026.

  • Jane Street held 22,128 shares of Quantum Corp worth $702K as of Q3 2026.
  • Quantum Corp was a new Jane Street position in Q3 2026.
  • Quantum Corp made up ﹤0.01% of Jane Street's portfolio in Q3 2026, its #7233 holding.
  • Jane Street first reported a position in Quantum Corp in Q2 2013 and has held it in 16 quarters since.
  • Jane Street's Quantum Corp position peaked at $1.81M in Q4 2024.
  • 70 funds tracked by Wall St. Rank held Quantum Corp as of Q3 2026.

Based on Jane Street's 13F filing for Q3 2026, filed 12 Nov 2026.