[Form 4] Archer Aviation Inc. Insider Trading Activity

Rhea-AI Filing Summary

Archer Aviation Director Deborah Diaz reported the vesting of 54,644 Restricted Stock Units (RSUs) on June 21, 2025, which were converted into an equivalent number of Class A Common Stock shares at $0 exercise price. Following this transaction, Diaz now directly owns 153,530 shares of Class A Common Stock.

The RSUs were subject to vesting conditions that included either:

• One year anniversary of the grant date, or
• The date of Archer Aviation's 2025 annual stockholders' meeting

This Form 4 filing, executed by Eric Lentell as attorney-in-fact for Diaz on June 24, 2025, represents a standard equity compensation arrangement for board members. The transaction was reported within the required SEC filing deadline and demonstrates continued alignment between director and shareholder interests through equity-based compensation.

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

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

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^*

Diaz Deborah

(Last) (First) (Middle)

C/O ARCHER AVIATION INC.

190 WEST TASMAN DRIVE

(Street)

SAN JOSE CA 95134

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
06/21/2025

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

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

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

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	06/21/2025		M		54,644	A	$0	153,530	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
Restricted Stock Units	(1)	06/21/2025		M			54,644	(2)	(3)	Class A Common Stock	54,644	$0	0	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock, subject to the reporting person's continued service to the Issuer as of the applicable vesting date.

2. The entire award vested or vests on the earlier of the: (i) one year anniversary of the grant date or (ii) date of the Issuer's 2025 annual stockholders' meeting.

3. These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date.

	/s/ Eric Lentell, Attorney-in-Fact for Deborah Diaz	06/24/2025
	** 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.
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FAQ

How many ACHR shares did Director Deborah Diaz acquire on June 21, 2025?

Director Deborah Diaz acquired 54,644 shares of ACHR Class A Common Stock on June 21, 2025 through the vesting of Restricted Stock Units (RSUs).

What is the total number of ACHR shares Deborah Diaz owns after the June 21, 2025 transaction?

Following the reported transaction, Deborah Diaz directly owns 153,530 shares of ACHR Class A Common Stock.

What was the vesting schedule for ACHR Director Diaz's Restricted Stock Units?

The Restricted Stock Units were scheduled to vest on the earlier of: (i) one year anniversary of the grant date or (ii) the date of Archer Aviation's 2025 annual stockholders' meeting.

What was the exercise price of ACHR RSUs converted by Director Diaz?

The Restricted Stock Units were converted to Class A Common Stock at $0 exercise price, as they represent a contingent right to receive shares subject to vesting conditions rather than a traditional stock option.