Mariner’s ASP Isotopes ASPI Stock Holding History

Mariner’s Portfolio ASPI Stock Details ASPI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-41,030	Closed	-$395K	–	3547
2025 Q3	$395K	Buy	41,030 +12,385	+43%	+$114K	﹤0.01%	2605
2025 Q2	$211K	Buy	+28,645	New	+$192K	﹤0.01%	3012

Other funds holding ASPI

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

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

Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return

RIM

Rovida Investment Management Grand Cayman, Cayman Islands $1.47B AUM 142.45% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

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

AIC

AWM Investment Company New York $1.15B AUM 201.65% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Mariner's ASPI Position: Q4 2025 in Review

Mariner sold out of ASP Isotopes (ASPI) in Q4 2025, closing a stake of 41,030 shares — an estimated $395K sold.

Mariner first reported a position in ASPI in Q2 2025 and held it in 2 quarters. The position peaked at $395K in Q3 2025. 173 funds tracked by Wall St. Rank hold ASPI as of Q4 2025.

Mariner reported no remaining ASP Isotopes position as of Q4 2025 after selling out during the quarter.
Mariner sold 41,030 ASP Isotopes shares in Q4 2025, an estimated $395K.
Mariner first reported a position in ASP Isotopes in Q2 2025 and held it in 2 quarters.
Mariner's ASP Isotopes position peaked at $395K in Q3 2025.
173 funds tracked by Wall St. Rank held ASP Isotopes as of Q4 2025.

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