Archer Aviation (NYSE: ACHR) officer sells 100K shares in 10b5-1 plan

Rhea-AI Filing Summary

Archer Aviation Inc. Chief Legal & Strategy Officer Eric Lentell sold a total of 100,000 shares of Class A Common Stock in open-market transactions at prices of $5.30 and $5.36 per share. These sales were executed under a pre-arranged Rule 10b5-1 trading plan and were described as offsetting certain tax liabilities and related costs from a previous restricted stock unit settlement. Following the transactions, Lentell directly held 50,119 shares and restricted stock units representing contingent rights to receive up to 548,955 additional shares, subject to service-based vesting.

Insider Trade Summary 10b5-1

Net Seller: 100,000 shares ($533,000)

Net Sell 2 txns

Insider Lentell Eric

Role Chief Legal & Strategy Officer

Sold 100,000 shs ($533K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	50,000	$5.30	$265K
Sale	Class A Common Stock	50,000	$5.36	$268K

Holdings After Transaction: Class A Common Stock — 50,119 shares (Direct)

Footnotes (1)

1. The transaction was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 3, 2025, as amended on December 23, 2025. This transaction was effected to offset certain tax liabilities and other related costs incurred by the reporting person in connection with the previous settlement of restricted stock units. Following the reported transaction, in addition to the 50,119 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 548,955 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 Sale price 1: $5.30 per share Sale price 2: $5.36 per share +2 more

5 metrics

Shares sold 100,000 shares Open-market sales of Class A Common Stock

Sale price 1 $5.30 per share 50,000-share sale on March 27, 2026

Sale price 2 $5.36 per share 50,000-share sale on March 26, 2026

Shares held after 50,119 shares Direct Class A Common Stock holdings post-transaction

Restricted stock units 548,955 RSUs Contingent rights to Class A shares, service-based vesting

Key Terms

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

4 terms

Rule 10b5-1 trading plan regulatory

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

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

"previous settlement of restricted stock units"

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

"restricted stock units representing contingent rights to receive up to an aggregate 548,955 shares ... subject to service-based vesting schedules"

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 Insider Transactions: What Each Field Means →

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 Legal & Strategy Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/26/2026

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	03/26/2026		S(1)(2)		50,000	D	$5.36	100,119	D
Class A Common Stock	03/27/2026		S(1)(2)		50,000	D	$5.3	50,119(3)	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 September 3, 2025, as amended on December 23, 2025.

2. This transaction was effected to offset certain tax liabilities and other related costs incurred by the reporting person in connection with the previous settlement of restricted stock units.

3. Following the reported transaction, in addition to the 50,119 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 548,955 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	03/31/2026
	** 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)

FAQ

What insider transactions did ACHR officer Eric Lentell report?

Eric Lentell reported selling 100,000 Archer Aviation Class A shares in two open-market transactions. The sales occurred at prices of $5.30 and $5.36 per share and were executed pursuant to a pre-arranged Rule 10b5-1 trading plan.

At what prices did ACHR’s Chief Legal & Strategy Officer sell shares?

He sold 50,000 Archer Aviation Class A shares at $5.30 per share and another 50,000 shares at $5.36 per share. Both transactions were reported as open-market sales under a Rule 10b5-1 trading plan.

How many Archer Aviation shares does Eric Lentell hold after these sales?

After the reported transactions, Eric Lentell directly held 50,119 Archer Aviation Class A shares. In addition, he held restricted stock units representing contingent rights to receive up to 548,955 shares, subject to service-based vesting schedules.

Why did ACHR’s Eric Lentell sell 100,000 shares?

The filing states the sales were executed to offset certain tax liabilities and related costs tied to a previous settlement of restricted stock units. The transactions occurred under a Rule 10b5-1 trading plan adopted and later amended by Lentell.

What is the significance of the Rule 10b5-1 plan in this ACHR Form 4?

The Form 4 notes that the sales were made under a Rule 10b5-1 trading plan adopted and later amended by Eric Lentell. Such plans pre-schedule trades, indicating the transactions were arranged in advance rather than timed opportunistically.

What equity awards related to ACHR does Eric Lentell still hold?

Beyond his 50,119 directly held Archer Aviation shares, Eric Lentell holds restricted stock units. These RSUs provide contingent rights to receive up to 548,955 Class A shares, which vest over time according to service-based vesting schedules.