JO
QUMS

John Overdeck’s Quantumsphere Acquisition Corp QUMS Stock Holding History

John Overdeck’s Portfolio QUMS Stock Details QUMS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-35,291
Closed -$357K – 5549
2026
Q1 		$357K Sell
35,291
-182,188
-84% -$1.84M ﹤0.01% 3961
2025
Q4 		$2.18M Buy
+217,479
New +$2.17M ﹤0.01% 2372

Other funds holding QUMS

WRBC
W.R. Berkley Corp Greenwich, Connecticut $2.1B AUM 13.6% 1-Year Est. Return
MSU
Mizuho Securities USA New York $6.2B AUM 35.46% 1-Year Est. Return
WAM
Wolverine Asset Management Chicago, Illinois $11.4B AUM 5.65% 1-Year Est. Return
KIM
Karpus Investment Management Pittsford, New York $3.48B AUM 10.49% 1-Year Est. Return
RCM
Rivernorth Capital Management West Palm Beach, Florida $2.1B AUM 2.15% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
SCM
Shaolin Capital Management Miami, Florida $2.1B AUM 64.05% 1-Year Est. Return
GCL
Glazer Capital LLC New York $4.07B AUM 78.71% 1-Year Est. Return
LA
Linden Advisors New York $19.3B AUM 1.47% 1-Year Est. Return
PAMP
Polar Asset Management Partners Toronto, Ontario, Canada $6.07B AUM 34.81% 1-Year Est. Return

John Overdeck's QUMS Position: Q2 2026 in Review

John Overdeck sold out of Quantumsphere Acquisition Corp (QUMS) in Q2 2026, closing a stake of 35,291 shares — an estimated $357K sold.

John Overdeck first reported a position in QUMS in Q4 2025 and held it in 2 quarters. The position peaked at $2.18M in Q4 2025. 27 funds tracked by Wall St. Rank hold QUMS as of Q2 2026.

  • John Overdeck reported no remaining Quantumsphere Acquisition Corp position as of Q2 2026 after selling out during the quarter.
  • John Overdeck sold 35,291 Quantumsphere Acquisition Corp shares in Q2 2026, an estimated $357K.
  • John Overdeck first reported a position in Quantumsphere Acquisition Corp in Q4 2025 and held it in 2 quarters.
  • John Overdeck's Quantumsphere Acquisition Corp position peaked at $2.18M in Q4 2025.
  • 27 funds tracked by Wall St. Rank held Quantumsphere Acquisition Corp as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.