ASP Isotopes Inc. (ASPI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

73,821,254Shares Outstanding

65,014Shares held by institutions

$349,775Value of institutional holdings

79.81%Institutional ownership %

36.71%Shares Changed QoQ

165No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

According to SEC filings for the period ending December 2025, ASP Isotopes Inc. (NASDAQ:ASPI) is held by 165 institutional firms.

The collective stake of institutional investors in ASP Isotopes moved to 79.8% in December 2025, a shift up from the 72.9% reported for September 2025.
The company experienced a 36.71% quarterly change in institutional shares held, alongside an increase of 73.68% in total owners annually.
The latest 13F cycle for ASP Isotopes reveals that of 165 total investors, 120 funds grew their exposure, whereas 34 reduced theirs and 11 made no changes.
The total number of shares held by institutions in ASP Isotopes increased to 58.92Mn as of December 2025, a net change of up by 15.82Mn shares quarter on quarter, and up 26.44Mn shares year over year.
The top institutional stake in ASP Isotopes as of December 31, 2025 belongs to BlackRock, Inc., which owns 6.79Mn shares, or 9.20% of the company.
Among the most significant buyers of ASP Isotopes during December 2025 were Alyeska Investment Group, L.P. (2.07Mn), VANGUARD GROUP INC (1.89Mn), UBS Group AG (1.45Mn), BlackRock, Inc. (1.33Mn), MORGAN STANLEY (1.27Mn).
Leading sellers of ASP Isotopes stock in December 2025 included AWM Investment Company, Inc. (834.10K), Squarepoint Ops LLC (597.33K), Telemark Asset Management, LLC (500.00K), MARSHALL WACE, LLP (460.99K), TUDOR INVESTMENT CORP ET AL (327.75K).
The top 10 institutional holders of ASP Isotopes for the quarter ending December 2025 included BlackRock, Inc. (6.79Mn), VANGUARD GROUP INC (6.41Mn), Alyeska Investment Group, L.P. (4.90Mn), Rovida Investment Management Ltd (4.10Mn), UBS Group AG (2.41Mn), GEODE CAPITAL MANAGEMENT, LLC (2.38Mn), AWM Investment Company, Inc. (2.12Mn), STATE STREET CORP (1.84Mn), JANE STREET GROUP, LLC (1.80Mn), CITADEL ADVISORS LLC (1.73Mn).

165 Institutional Holders

65,014 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	6,789,417	1,328,425	24.33%	$36,323,380.00
VANGUARD GROUP INC	31 Dec, 2025	6,406,244	1,889,481	41.83%	$34,273,406.00
Alyeska Investment Group, L.P.	31 Dec, 2025	4,895,546	2,072,851	73.44%	$26,191,171.00
Rovida Investment Management Ltd	31 Dec, 2025	4,100,000	900,000	28.13%	$21,894,000.00
UBS Group AG	31 Dec, 2025	2,406,457	1,445,165	150.34%	$12,874,546.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	2,384,066	521,611	28.01%	$12,757,945.00
AWM Investment Company, Inc.	31 Dec, 2025	2,124,496	-834,100	-28.19%	$11,366,054.00
STATE STREET CORP	31 Dec, 2025	1,844,405	438,673	31.21%	$9,867,567.00
JANE STREET GROUP, LLC	31 Dec, 2025	1,799,861	137,444	8.27%	$9,629,256.00
CITADEL ADVISORS LLC	31 Dec, 2025	1,725,553	559,788	48.02%	$9,231,709.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	1,725,292	1,108,040	179.51%	$9,230,313.00
MORGAN STANLEY	31 Dec, 2025	1,709,783	1,270,030	288.81%	$9,147,339.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	1,516,643	174,860	13.03%	$8,114,040.00
EXCHANGE TRADED CONCEPTS, LLC	31 Dec, 2025	1,400,314	194,034	16.09%	$7,491,680.00
BNP Paribas Asset Management Holding S.A.	31 Dec, 2025	944,326	280,387	42.23%	$5,052.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	885,739	223,778	33.81%	$4,738,704.00
Shay Capital LLC	31 Dec, 2025	882,300	659,300	295.65%	$4,720,305.00
Telemark Asset Management, LLC	31 Dec, 2025	825,000	-500,000	-37.74%	$4,413,750.00
MARSHALL WACE, LLP	31 Dec, 2025	818,129	-460,992	-36.04%	$4,376,991.00
NORTHERN TRUST CORP	31 Dec, 2025	745,909	145,860	24.31%	$3,990,614.00

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