WRBC
QUMSR

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

W.R. Berkley Corp’s Portfolio QUMSR Stock Details QUMSR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$7.73K Hold
35,110
– – ﹤0.01% 338
2025
Q4 		$7.38K Buy
+35,110
New +$9.15K ﹤0.01% 278

Other funds holding QUMSR

HCI
Harraden Circle Investments New York $499M AUM 24.03% 1-Year Est. Return
HCM
Highbridge Capital Management New York $3.09B AUM 31.19% 1-Year Est. Return
Toronto Dominion Bank
Toronto Dominion Bank Toronto, Ontario, Ontario, Canada $69.7B AUM 40.86% 1-Year Est. Return
SCM
Shaolin Capital Management Miami, Florida $2.71B AUM 64.83% 1-Year Est. Return
RCM
Rivernorth Capital Management West Palm Beach, Florida $2B AUM 0.66% 1-Year Est. Return
PAMP
Polar Asset Management Partners Toronto, Ontario, Canada $5.01B AUM 35.27% 1-Year Est. Return
LA
Linden Advisors New York $17.9B AUM 1.72% 1-Year Est. Return
AA
AQR Arbitrage Greenwich, Connecticut $6.09B AUM 27.01% 1-Year Est. Return
HIM
HGC Investment Management Toronto, Ontario, Canada $451M AUM 8.78% 1-Year Est. Return
GCL
Glazer Capital LLC New York $4.71B AUM 81.93% 1-Year Est. Return

W.R. Berkley Corp's QUMSR Position: Q1 2026 in Review

W.R. Berkley Corp held its Quantumsphere Acquisition Corp Rights (QUMSR) position steady in Q1 2026 at 35,110 shares worth $7.73K. The position accounts for ﹤0.01% of the portfolio, ranked #338.

W.R. Berkley Corp first reported a position in QUMSR in Q4 2025 and has held it in 2 quarters since. 24 funds tracked by Wall St. Rank hold QUMSR as of Q1 2026.

  • W.R. Berkley Corp held 35,110 shares of Quantumsphere Acquisition Corp Rights worth $7.73K as of Q1 2026.
  • W.R. Berkley Corp left its Quantumsphere Acquisition Corp Rights share count unchanged in Q1 2026.
  • Quantumsphere Acquisition Corp Rights made up ﹤0.01% of W.R. Berkley Corp's portfolio in Q1 2026, its #338 holding.
  • W.R. Berkley Corp first reported a position in Quantumsphere Acquisition Corp Rights in Q4 2025 and has held it in 2 quarters since.
  • 24 funds tracked by Wall St. Rank held Quantumsphere Acquisition Corp Rights as of Q1 2026.

Based on W.R. Berkley Corp's 13F filing for Q1 2026, filed 15 May 2026.