JY
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Jeff Yass’s Quantum Corp QMCO Stock Holding History

Jeff Yass’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 		$289K Buy
+26,300
New +$252K ﹤0.01% 11126
2025
Q1 		– Sell
-10,500
Closed -$566K – 13271
2024
Q4 		$566K Buy
+10,500
New +$152K ﹤0.01% 8365
2021
Q4 		– Sell
-2,465
Closed -$255K – 13750
2021
Q3 		$255K Sell
2,465
-3,415
-58% -$402K ﹤0.01% 10971
2021
Q2 		$810K Buy
+5,880
New +$951K ﹤0.01% 8336
2021
Q1 		– Sell
-1,605
Closed -$196K – 12732
2020
Q4 		$196K Buy
1,605
+85
+6% +$9.04K ﹤0.01% 10057
2020
Q3 		$140K Buy
+1,520
New +$148K ﹤0.01% 9728
2019
Q1 		– Sell
-790
Closed -$32K – 9648
2018
Q4 		$32K Sell
790
-325
-29% -$14.9K ﹤0.01% 8597
2018
Q3 		$54K Sell
1,115
-790
-41% -$32.3K ﹤0.01% 8823
2018
Q2 		$84K Buy
1,905
+800
+72% +$53.7K ﹤0.01% 9108
2018
Q1 		$80K Buy
+1,105
New +$108K ﹤0.01% 8787
2017
Q4 		– Sell
-720
Closed -$88K – 9786
2017
Q3 		$88K Sell
720
-925
-56% -$124K ﹤0.01% 8397
2017
Q2 		$257K Buy
+1,645
New +$255K ﹤0.01% 7849
2016
Q2 		– Sell
-98
Closed -$10K – 9183
2016
Q1 		$10K Sell
98
-36
-27% -$3.46K ﹤0.01% 8880
2015
Q4 		$20K Sell
134
-2
-1% -$274 ﹤0.01% 9226
2015
Q3 		$15K Buy
136
+22
+19% +$4.07K ﹤0.01% 9521
2015
Q2 		$31K Buy
+114
New +$34.8K ﹤0.01% 9942

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

Jeff Yass's QMCO Position: Q2 2026 in Review

Jeff Yass opened a new position in Quantum Corp (QMCO) in Q2 2026: 69,775 shares worth $768K. The stake represents ﹤0.01% of the portfolio and ranks #8877 among its holdings. This is a return to the name: Jeff Yass previously reported a position in QMCO as recently as Q4 2024.

Jeff Yass first reported a position in QMCO in Q2 2013 and has held it in 28 quarters since. 59 funds tracked by Wall St. Rank hold QMCO as of Q2 2026.

  • Jeff Yass held 69,775 shares of Quantum Corp worth $768K as of Q2 2026.
  • Quantum Corp was a new Jeff Yass position in Q2 2026.
  • Quantum Corp made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #8877 holding.
  • Jeff Yass first reported a position in Quantum Corp in Q2 2013 and has held it in 28 quarters since.
  • 59 funds tracked by Wall St. Rank held Quantum Corp as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.