Filer	Title/Relationship	Filing Date	Planned Shares	Est. Value
Ainscow Donald George	OFFICER	2026-06-30	100K shares	$622K
Wider Todd	Director	2026-06-29	100K shares	$628K
Gorley Michael	DIRECTOR	2026-06-29	30K shares	$187K
Ainscow Robert	OFFICER	2026-06-08	8K shares	$58K

Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

Filings (14d)

Data as of 2026-07-16

2026-07-16

ASP Isotopes Inc. filed this Form 8-K to recast its 2025 annual report financials, showing the construction services business – formerly part of Skyline Builders Group – as discontinued operations. The company deconsolidated Skyline on March 29, 2026, and now holds about 8.6% of Skyline's shares. This filing updates the management discussion and financial statements accordingly, but it does not amend the original 2025 10-K.

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2026-07-16

ASP Isotopes and its subsidiary, Quantum Leap Energy, entered into agreements to swap about $109.2 million of their convertible notes for 23.16 million newly issued shares of ASPI common stock. The deal covers accrued interest and is expected to close on July 16, 2026. After the exchange, around $110.7 million of the notes will still be outstanding.

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View all Form 8-K filings

FAQ

Who are the top institutional investors holding ASP ISOTOPES INC (ASPI)?

Major stakeholders currently include BlackRock, Inc. ($36.8M), Encompass Capital Advisors LLC ($30.6M), Susquehanna International Group, LLP ($23.6M). Based on the latest 13F filings, there are a total of 180 tracked investment funds and institutions maintaining positions in ASPI.

What is the overall institutional sentiment toward ASPI recently?

Institutional sentiment appears Bearish (Net Selling). During the most recent reporting quarter, the stock experienced a net outflow of $34.5M, driven by 115 managers accumulating shares while 76 reduced their exposure.

Which institutions have been selling or reducing their ASPI positions?

In the latest period, 41 funds trimmed their holdings, and 35 managers completely exited their positions. The aggregate reported sell value was $133.6M.

Are there any notable investors adding ASPI to their portfolios?

Yes, buying activity remains notable. 35 institutions opened new positions in {ticker}, and 80 existing holders added to their shares. The total reported buy value for the quarter amounted to $202.9M.