Quantumsphere Acquisition Corp - QUMS

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q4 2025 · Compare: Q3 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
MIZUHO SECURITIES USA LLC History New 718,086 7,128 0.12% 1 +718,086 New Q4 2025 Feb 09, 2026
WOLVERINE ASSET MANAGEMENT LLC History Added to 575,222 5,757 0.05% 0.01% 2 +425,222 283.48% Q4 2025 Feb 02, 2026
Karpus Management, Inc. History New 494,350 4,948 0.15% 3 +494,350 New Q4 2025 Feb 17, 2026
Shaolin Capital Management LLC History New 480,000 4,804 0.15% 4 +480,000 New Q4 2025 Feb 17, 2026
Clear Street Group Inc. History Added to 439,628 4,403 0.02% 0.01% 5 +220,172 100.33% Q4 2025 Feb 13, 2026
RIVERNORTH CAPITAL MANAGEMENT, LLC History Reduced 424,512 4,321 0.2% 0.25% 6 -488 -0.11% Q4 2025 Feb 17, 2026
GLAZER CAPITAL, LLC History Added to 424,153 4,246 0.11% 0.14% 7 +3,611 0.86% Q4 2025 Feb 13, 2026
D. E. Shaw & Co., Inc. History Added to 409,860 4,102 0.0% 0.0% 8 +284,860 227.89% Q4 2025 Feb 17, 2026
Polar Asset Management Partners Inc. History New 400,000 4,072 0.05% 9 +400,000 New Q4 2025 Feb 17, 2026
LINDEN ADVISORS LP History No change 400,000 4,004 0.02% 0.03% 10 0 0.0% Q4 2025 Feb 17, 2026
Westchester Capital Management, LLC History Added to 350,000 3,520 0.15% 0.05% 11 +250,000 250.0% Q4 2025 Feb 13, 2026
AQR Arbitrage LLC History No change 322,660 3,229 0.07% 0.08% 12 0 0.0% Q4 2025 Feb 17, 2026
BERKLEY W R CORP History Added to 303,580 3,038 0.14% 0.09% 13 +154,810 104.06% Q4 2025 Feb 13, 2026
HGC Investment Management Inc. History No change 300,000 3,003 0.64% 0.74% 14 0 0.0% Q4 2025 Feb 17, 2026
Hudson Bay Capital Management LP History No change 235,000 2,352 0.01% 0.01% 15 0 0.0% Q4 2025 Feb 13, 2026
TWO SIGMA INVESTMENTS, LP History Reduced 217,479 2,176 0.0% 0.0% 16 -5,011 -2.25% Q4 2025 Feb 17, 2026
TORONTO DOMINION BANK History Reduced 175,778 1,759 0.0% 0.01% 17 -185,222 -51.31% Q4 2025 Feb 17, 2026
Cable Car Capital, LP History No change 174,801 1,749 0.06% 0.76% 18 0 0.0% Q4 2025 Feb 17, 2026
HEIGHTS CAPITAL MANAGEMENT, INC History No change 150,000 1,501 0.54% 0.43% 19 0 0.0% Q4 2025 Feb 17, 2026
Radcliffe Capital Management, L.P. History No change 150,000 1,501 0.08% 0.09% 20 0 0.0% Q4 2025 Feb 17, 2026
PERISCOPE CAPITAL INC. History No change 125,000 1,251 0.14% 0.2% 21 0 0.0% Q4 2025 Feb 10, 2026
BNP PARIBAS FINANCIAL MARKETS History No change 102,340 1,024 0.0% 0.0% 22 0 0.0% Q4 2025 Feb 10, 2026
GABELLI & Co INVESTMENT ADVISERS, INC. History No change 67,700 689 0.1% 0.11% 23 0 0.0% Q4 2025 Feb 05, 2026
GABELLI FUNDS LLC History New 57,300 583 0.0% 24 +57,300 New Q4 2025 Feb 05, 2026
Schonfeld Strategic Advisors LLC History Reduced 55,000 550 0.0% 0.01% 25 -32,486 -37.13% Q4 2025 Feb 17, 2026
Warberg Asset Management LLC History No change 41,421 414 0.05% 0.07% 26 0 0.0% Q4 2025 Feb 13, 2026
HRT FINANCIAL LP History Added to 31,089 316 0.0% 0.0% 27 +1,104 3.68% Q4 2025 Feb 12, 2026
Virtu Financial LLC History Added to 24,783 248 0.01% 0.01% 28 +9,849 65.95% Q4 2025 Feb 23, 2026
Logan Stone Capital, LLC History New 14,500 145 0.04% 29 +14,500 New Q4 2025 Feb 17, 2026
JPMORGAN CHASE & CO History No change 10,000 101 0.0% 0.0% 30 0 0.0% Q4 2025 Feb 11, 2026
UBS Group AG History New 459 4 0.0% 31 +459 New Q4 2025 Jan 29, 2026
HIGHBRIDGE CAPITAL MANAGEMENT LLC History Closed out 0 0 0.26% -600,000 -100.0% Q3 2025 Nov 10, 2025
Harraden Circle Investments, LLC History Closed out 0 0 0.79% -400,707 -100.0% Q3 2025 Nov 13, 2025
METEORA CAPITAL, LLC History Closed out 0 0 0.25% -229,999 -100.0% Q3 2025 Nov 17, 2025
StoneX Group Inc. History Closed out 0 0 0.07% -168,149 -100.0% Q3 2025 Nov 14, 2025
BOOTHBAY FUND MANAGEMENT, LLC History Closed out 0 0 0.01% -100,000 -100.0% Q3 2025 Nov 14, 2025
TrueMark Investments, LLC History Closed out 0 0 0.02% -10,000 -100.0% Q3 2025 Oct 30, 2025
MORGAN STANLEY History New 30 0 +30 New Q4 2025 Feb 13, 2026