LA
QUMSR

Linden Advisors’s Quantumsphere Acquisition Corp Rights QUMSR Stock Holding History

Linden Advisors’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 		$90K Hold
400,000
– – ﹤0.01% 473
2025
Q4 		$88K Buy
+400,000
New +$104K ﹤0.01% 410

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
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
CS
Clear Street New York $24.6B AUM 56.26% 1-Year Est. Return

Linden Advisors's QUMSR Position: Q1 2026 in Review

Linden Advisors held its Quantumsphere Acquisition Corp Rights (QUMSR) position steady in Q1 2026 at 400,000 shares worth $90K. The position accounts for ﹤0.01% of the portfolio, ranked #473.

Linden Advisors 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.

  • Linden Advisors held 400,000 shares of Quantumsphere Acquisition Corp Rights worth $90K as of Q1 2026.
  • Linden Advisors left its Quantumsphere Acquisition Corp Rights share count unchanged in Q1 2026.
  • Quantumsphere Acquisition Corp Rights made up ﹤0.01% of Linden Advisors's portfolio in Q1 2026, its #473 holding.
  • Linden Advisors 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 Linden Advisors's 13F filing for Q1 2026, filed 15 May 2026.