Mariner’s Quantum Computing Inc QUBT Stock Holding History

Mariner’s Portfolio QUBT Stock Details QUBT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-23,260	Closed	-$428K	–	3756
2025 Q3	$428K	Sell	23,260 -1,972	-8%	-$33.8K	﹤0.01%	2554
2025 Q2	$484K	Buy	25,232 +11,169	+79%	+$123K	﹤0.01%	2364
2025 Q1	$113K	Buy	+14,063	New	+$124K	﹤0.01%	3164

Other funds holding QUBT

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Marex Group London $23.6B AUM 57.16% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Defiance ETFs New York $7.37B AUM

PCM

Penserra Capital Management Orinda, California $13B AUM 71.84% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return

Capital Fund Management (CFM) Paris, France $22.7B AUM 32.92% 1-Year Est. Return

Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return

Mariner's QUBT Position: Q4 2025 in Review

Mariner sold out of Quantum Computing Inc (QUBT) in Q4 2025, closing a stake of 23,260 shares — an estimated $428K sold.

Mariner first reported a position in QUBT in Q1 2025 and held it in 3 quarters. The position peaked at $484K in Q2 2025. 287 funds tracked by Wall St. Rank hold QUBT as of Q4 2025.

Mariner reported no remaining Quantum Computing Inc position as of Q4 2025 after selling out during the quarter.
Mariner sold 23,260 Quantum Computing Inc shares in Q4 2025, an estimated $428K.
Mariner first reported a position in Quantum Computing Inc in Q1 2025 and held it in 3 quarters.
Mariner's Quantum Computing Inc position peaked at $484K in Q2 2025.
287 funds tracked by Wall St. Rank held Quantum Computing Inc as of Q4 2025.

Based on Mariner's 13F filing for Q4 2025, filed 13 Feb 2026.