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ASPI — structural market context

ASP Isotopes Inc.

Structural market context from public regulatory and market data, shown with its as-of dates. Descriptive only: nothing on this page is a recommendation, a prediction, or advice to buy or sell any security.

What changed

As of the close on Oct 21. Each line shows the earlier value, the later value and their dates.

Price

Close $2.17 (Oct 21) vs $2.03 (Oct 20): +6.90%.

Volume

0.56× its 20-session average (5.0M) on Oct 21.

Includes pre- and post-market trading.

Short interest

Short interest 26.5M shares (settlement Sep 30) vs 26.1M (Sep 15).

No new publication in this window. Latest: settlement Sep 30, published Oct 10.

Fails-to-deliver

Latest file (settlements Sep 15–Sep 30, published Oct 16): 7 days with fails, largest 246K shares on Sep 29.

Previous file (settlements Sep 1–Sep 14, published Sep 30): 7 days with fails, largest 300K shares on Sep 10.

No new publication in this window.

Insider filings (Form 4)

None recorded in this window.

ASPI short interest & days to cover

SHARES SHORT
26.5M
% OF FLOAT
19.9%
DAYS TO COVER
5.3
CHANGE VS PRIOR
+1.5%

FINRA consolidated short interest, reported twice a month and published ~2 weeks after each settlement date. % of float uses reported free float. · as of 2026-09-30 (22d ago)

ASPI fails-to-deliver (FTD)

Settlement dateFailed sharesPrice
2026-09-30 · 22d222K$2.64
2026-09-29 · 23d246K$2.6
2026-09-24 · 28d8K$3.01

SEC fails-to-deliver files, published twice a month with ~6 weeks of delay.

ASPI insider buying and selling (Form 4)

Last 12 months, Form 4 codes P and S: 2 purchases · 8 sales

InsiderTypeSharesValueFiled
Kiessling Heather · officer: Chief Financial OfficerSale (S)22K$48K2026-10-21
Ainscow Robert · officer: COOSale (S)23K$48K2026-10-16
Ryan Robert John Andrew · directorPurchase (P)15K$40K2026-10-01
Ryan Robert John Andrew · directorPurchase (P)8K$22K2026-09-30
Ainscow Robert · officer: COOSale (S)8K$36K2026-09-10

SEC Form 4 filings: purchases and sales reported on Form 4 (transaction codes P and S) only; grants and option exercises excluded. Attributed public records.

Frequently asked questions

What is ASPI's short interest?
As of the FINRA settlement date 2026-09-30, ASPI had 26.5M shares sold short — 19.9% of its float, with 5.3 days to cover at average volume. FINRA publishes this data roughly two weeks after each twice-monthly settlement, so it is inherently delayed. A short-interest figure describes an aggregate position; it does not predict what the stock will do.
Are insiders buying ASPI?
In the last 12 months of SEC Form 4 filings, ASPI recorded 2 insider purchases and 8 sales reported on Form 4 (transaction codes P and S; grants and option exercises excluded). These are attributed public records — information, not instruction.
Is this page telling me to buy or sell ASPI?
No. Everything on this page is descriptive, structural market context from public data, shown with its as-of dates. TradeAI News does not issue directional recommendations, price predictions, or buy/sell advice — for any ticker.
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ASPI: the full history

Latest rows shown. Full history, market-wide screens, cluster detection and the context journal live in the dashboard.

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Not financial advice. Trading involves risk. Descriptive structural context, never a recommendation.