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ACHR — structural market context

Archer Aviation 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 $3.87 (Oct 21) vs $3.98 (Oct 20): −2.76%.

Volume

0.87× its 20-session average (23.8M) on Oct 21.

Includes pre- and post-market trading.

Short interest

Short interest 104.0M shares (settlement Sep 30) vs 94.4M (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): 9 days with fails, largest 4.0M shares on Sep 21.

Previous file (settlements Sep 1–Sep 14, published Sep 30): 5 days with fails, largest 145K shares on Sep 10.

No new publication in this window.

Insider filings (Form 4)

None recorded in this window.

ACHR short interest & days to cover

SHARES SHORT
104.0M
% OF FLOAT
16.1%
DAYS TO COVER
4.1
CHANGE VS PRIOR
+10.1%

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)

ACHR fails-to-deliver (FTD)

Settlement dateFailed sharesPrice
2026-09-29 · 23d265K$5.2
2026-09-28 · 24d17K$5.61
2026-09-25 · 27d93K$5.71

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

ACHR insider buying and selling (Form 4)

Last 12 months, Form 4 codes P and S: 0 purchases · 6 sales

InsiderTypeSharesValueFiled
Lyon Benjamin · officer: President, Aircraft OEMSale (S)45K$246K2026-09-23
Lentell Eric · officer: Chief Strategy OfficerSale (S)100K$631K2026-08-21
Lyon Benjamin · officer: President, Aircraft OEMSale (S)50K$322K2026-08-18
Rungta Harsh · officer: Chief Accounting OfficerSale (S)14K$89K2026-08-18
Gupta Priya · officer: Interim CFOSale (S)10K$64K2026-08-18

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 ACHR's short interest?
As of the FINRA settlement date 2026-09-30, ACHR had 104.0M shares sold short — 16.1% of its float, with 4.1 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 ACHR?
In the last 12 months of SEC Form 4 filings, ACHR recorded 0 insider purchases and 6 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 ACHR?
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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ACHR: 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.