HCM
QUMSU

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

Heights 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
2025
Q4 		– Sell
-150,000
Closed -$1.52M – 254
2025
Q3 		$1.52M Buy
+150,000
New +$1.51M 0.43% 51

Other funds holding QUMSU

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
WCMNY
Westchester Capital Management (New York) Valhalla, New York $2.21B AUM 26.02% 1-Year Est. Return
GCIA
Gabelli & Co Investment Advisers Rye, New York $674M AUM 64.52% 1-Year Est. Return
GF
Gabelli Funds Rye, New York $14.8B AUM 32.24% 1-Year Est. Return
HF
HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return
CS
Clear Street New York $24.6B AUM 56.26% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Heights Capital Management's QUMSU Position: Q4 2025 in Review

Heights Capital Management sold out of Quantumsphere Acquisition Corp Units (QUMSU) in Q4 2025, closing a stake of 150,000 shares — an estimated $1.52M sold.

Heights Capital Management first reported a position in QUMSU in Q3 2025 and held it in 1 quarter. The position peaked at $1.52M in Q3 2025. 9 funds tracked by Wall St. Rank hold QUMSU as of Q4 2025.

  • Heights Capital Management reported no remaining Quantumsphere Acquisition Corp Units position as of Q4 2025 after selling out during the quarter.
  • Heights Capital Management sold 150,000 Quantumsphere Acquisition Corp Units shares in Q4 2025, an estimated $1.52M.
  • Heights Capital Management first reported a position in Quantumsphere Acquisition Corp Units in Q3 2025 and held it in 1 quarter.
  • Heights Capital Management's Quantumsphere Acquisition Corp Units position peaked at $1.52M in Q3 2025.
  • 9 funds tracked by Wall St. Rank held Quantumsphere Acquisition Corp Units as of Q4 2025.

Based on Heights Capital Management's 13F filing for Q4 2025, filed 17 Feb 2026.