Archer Aviation CSO sells 100K shares for $631K

Archer Aviation Inc. (ACHR) reported that Chief Strategy Officer Eric Lentell sold 100,000 shares of Class A Common Stock on August 20, 2026 at an average price of $6.31 per share in an open-market or private transaction.

Rhea-AI Filing Summary

Archer Aviation Inc. (ACHR) reported that Chief Strategy Officer Eric Lentell sold 100,000 shares of Class A Common Stock on August 20, 2026 at an average price of $6.31 per share in an open-market or private transaction. The sale was executed pursuant to a Rule 10b5-1 trading plan adopted on May 22, 2026. After this transaction, he holds 85,011 shares of Class A Common Stock plus restricted stock units representing up to 435,687 additional shares, subject to service-based vesting conditions.

Insider Trade Summary 10b5-1

Net Seller: 100,000 shares

Net Sell 1 txn

Insider Lentell Eric

Role Chief Strategy Officer

Sold 100,000 shs ($631K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2	100,000	$6.31	$631K

Holdings After Transaction: Class A Common Stock — 85,011 shares (Direct)

Footnotes (2)

1. F1. The transaction was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2026.
2. F2. Following the reported transaction, in addition to the 85,011 shares of Class A Common Stock beneficially owned by the reporting person, the reporting person held restricted stock units representing contingent rights to receive up to an aggregate 435,687 shares of the Issuer's Class A Common Stock, which restricted stock units are subject to service-based vesting schedules and vest according to their respective terms.

Key Figures

Shares sold: 100,000 shares of Class A Common Stock Sale price per share: $6.31 per share Total shares following transaction: 85,011 shares +2 more

5 metrics

Shares sold 100,000 shares of Class A Common Stock Sale on August 20, 2026 by Chief Strategy Officer Eric Lentell

Sale price per share $6.31 per share Average price for 100,000 shares sold on August 20, 2026

Total shares following transaction 85,011 shares Class A Common Stock beneficially owned by Eric Lentell after the sale

Restricted stock units 435,687 shares Maximum shares underlying RSUs held by Eric Lentell, subject to service-based vesting

10b5-1 plan adoption date May 22, 2026 Date Eric Lentell adopted the Rule 10b5-1 trading plan used for this sale

Key Terms

Rule 10b5-1 trading plan, restricted stock units, service-based vesting schedules

3 terms

Rule 10b5-1 trading plan regulatory

"The transaction was executed pursuant to a Rule 10b5-1 trading plan adopted"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

restricted stock units financial

"the reporting person held restricted stock units representing contingent rights"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

service-based vesting schedules financial

"which restricted stock units are subject to service-based vesting schedules"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ACHR report for Eric Lentell?

Archer Aviation Inc. reported that Chief Strategy Officer Eric Lentell sold 100,000 shares of Class A Common Stock on August 20, 2026 at an average price of $6.31 per share in an open-market or private transaction.

Was the ACHR insider sale by Eric Lentell under a Rule 10b5-1 plan?

Yes. The sale by Eric Lentell was executed pursuant to a Rule 10b5-1 trading plan that he adopted on May 22, 2026, as disclosed in the footnotes and indicated by the filing’s Rule 10b5-1 checkbox.

How many ACHR shares did Eric Lentell hold after the reported sale?

Following the sale, Eric Lentell beneficially owned 85,011 shares of Archer Aviation Inc. Class A Common Stock. This figure reflects his direct holdings after disposing of 100,000 shares in the reported transaction.

What additional equity awards in ACHR does Eric Lentell hold?

In addition to his 85,011 shares, Eric Lentell held restricted stock units representing contingent rights to receive up to 435,687 shares of Archer Aviation Inc. Class A Common Stock, subject to service-based vesting schedules and vesting according to their respective terms.

What was the total value of Eric Lentell’s ACHR share sale?

Eric Lentell sold 100,000 shares at an average price of $6.31 per share, for a transaction value of approximately $631,000, based on the reported per-share price and share count.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/21/2026 - 08:01 PM EDT Accepted by SEC EDGAR 08/21/2026 - 08:00 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Lentell Eric

(Last) (First) (Middle)

C/O ARCHER AVIATION INC.

190 WEST TASMAN DRIVE

(Street)

SAN JOSE CALIFORNIA 95134

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Archer Aviation Inc. [ ACHR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Strategy Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	08/20/2026		S(1)		100,000	D	$6.31	85,011(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The transaction was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2026.

2. Following the reported transaction, in addition to the 85,011 shares of Class A Common Stock beneficially owned by the reporting person, the reporting person held restricted stock units representing contingent rights to receive up to an aggregate 435,687 shares of the Issuer's Class A Common Stock, which restricted stock units are subject to service-based vesting schedules and vest according to their respective terms.

	/s/ Eric Lentell	08/21/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)