WRBC
QUMS

W.R. Berkley Corp’s Quantumsphere Acquisition Corp QUMS Stock Holding History

W.R. Berkley Corp’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 		$9.01M Buy
881,402
+372,862
+73% +$3.79M 0.41% 48
2026
Q1 		$5.15M Buy
508,540
+204,960
+68% +$2.07M 0.28% 70
2025
Q4 		$3.04M Buy
+303,580
New +$3.03M 0.14% 113

Other funds holding QUMS

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
HCM
Highbridge Capital Management New York $4.11B AUM 26.03% 1-Year Est. Return

W.R. Berkley Corp's QUMS Position: Q2 2026 in Review

W.R. Berkley Corp increased its Quantumsphere Acquisition Corp (QUMS) stake by 73% in Q2 2026, buying an estimated $3.79M and bringing the position to 881,402 shares worth $9.01M. The position accounts for 0.41% of the portfolio, ranked #48.

W.R. Berkley Corp first reported a position in QUMS in Q4 2025 and has held it in 3 quarters since. 27 funds tracked by Wall St. Rank hold QUMS as of Q2 2026.

  • W.R. Berkley Corp held 881,402 shares of Quantumsphere Acquisition Corp worth $9.01M as of Q2 2026.
  • W.R. Berkley Corp bought 372,862 Quantumsphere Acquisition Corp shares in Q2 2026, an estimated $3.79M.
  • Quantumsphere Acquisition Corp made up 0.41% of W.R. Berkley Corp's portfolio in Q2 2026, its #48 holding.
  • W.R. Berkley Corp first reported a position in Quantumsphere Acquisition Corp in Q4 2025 and has held it in 3 quarters since.
  • 27 funds tracked by Wall St. Rank held Quantumsphere Acquisition Corp as of Q2 2026.

Based on W.R. Berkley Corp's 13F filing for Q2 2026, filed 14 Aug 2026.