RCM
QUMSU

Rivernorth Capital Management’s Quantumsphere Acquisition Corp Units QUMSU Stock Holding History

Rivernorth Capital Management’s Portfolio QUMSU Stock Details QUMSU Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-424,512
Closed -$4.32M – 623
2025
Q4 		$4.32M Sell
424,512
-488
-0.1% -$4.97K 0.2% 147
2025
Q3 		$4.31M Buy
+425,000
New +$4.27M 0.25% 108

Other funds holding QUMSU

WCMNY
Westchester Capital Management (New York) Valhalla, New York $2.04B AUM 31.03% 1-Year Est. Return
GCIA
Gabelli & Co Investment Advisers Rye, New York $688M AUM 63.4% 1-Year Est. Return
GF
Gabelli Funds Rye, New York $15.7B AUM 36.4% 1-Year Est. Return
HF
HRT Financial New York $54.8B AUM 81.03% 1-Year Est. Return
CS
Clear Street New York $39.5B AUM 124.03% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
GCL
Glazer Capital LLC New York $4.71B AUM 81.93% 1-Year Est. Return

Rivernorth Capital Management's QUMSU Position: Q1 2026 in Review

Rivernorth Capital Management sold out of Quantumsphere Acquisition Corp Units (QUMSU) in Q1 2026, closing a stake of 424,512 shares — an estimated $4.32M sold.

Rivernorth Capital Management first reported a position in QUMSU in Q3 2025 and held it in 2 quarters. The position peaked at $4.32M in Q4 2025. 8 funds tracked by Wall St. Rank hold QUMSU as of Q1 2026.

  • Rivernorth Capital Management reported no remaining Quantumsphere Acquisition Corp Units position as of Q1 2026 after selling out during the quarter.
  • Rivernorth Capital Management sold 424,512 Quantumsphere Acquisition Corp Units shares in Q1 2026, an estimated $4.32M.
  • Rivernorth Capital Management first reported a position in Quantumsphere Acquisition Corp Units in Q3 2025 and held it in 2 quarters.
  • Rivernorth Capital Management's Quantumsphere Acquisition Corp Units position peaked at $4.32M in Q4 2025.
  • 8 funds tracked by Wall St. Rank held Quantumsphere Acquisition Corp Units as of Q1 2026.

Based on Rivernorth Capital Management's 13F filing for Q1 2026, filed 15 May 2026.