RSU vesting adds Class A stock to Archer Aviation (ACHR) CTO

Rhea-AI Filing Summary

Archer Aviation Inc. chief technology officer Thomas Paul Muniz reported multiple equity transactions dated March 1, 2026. All were coded as derivative exercises/conversions, moving vested Restricted Stock Units into Class A Common Stock, including blocks of 143,750, 8,945, 7,718 and 7,612 shares at a reported price of $0.00 per share. Footnotes explain that each RSU converts into one Class A share and vests in scheduled quarterly tranches; the units do not expire but either vest or are cancelled before vesting.

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

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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^*

Muniz Thomas Paul

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

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	03/01/2026		M		143,750	A	$0	1,415,879	D
Class A Common Stock	03/01/2026		M		8,945	A	$0	1,424,824	D
Class A Common Stock	03/01/2026		M		7,612	A	$0	1,432,436	D
Class A Common Stock	03/01/2026		M		7,718	A	$0	1,440,154	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)	03/01/2026		M			143,750	(2)	(3)	Class A Common Stock	143,750	$0	718,750	D
Restricted Stock Units	(1)	03/01/2026		M			8,945	(4)	(3)	Class A Common Stock	8,945	$0	71,564	D
Restricted Stock Units	(1)	03/01/2026		M			7,612	(5)	(3)	Class A Common Stock	7,612	$0	53,277	D
Restricted Stock Units	(1)	03/01/2026		M			7,718	(6)	(3)	Class A Common Stock	7,718	$0	84,901	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 status as a service provider to the issuer.

2. The award vested or vests as to: (i) 1/4 of the total award on May 15, 2024; and (ii) 1/16 of the total award quarterly thereafter on March 1, May 15, August 15, and November 15.

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

4. The award vested or vests quarterly as to 1/16 of the total award, with the first tranche vested on May 15, 2024, and thereafter on August 15, November 15, March 1, and May 15.

5. The award vested or vests quarterly as to 1/12 of the total award, with the first tranche vested on March 1, 2025, and thereafter on May 15, August 15, November 15, and March 1.

6. The award vested or vests quarterly as to 1/12 of the total award, with the first tranche vested on March 1, 2026, and thereafter on May 15, August 15, November 15, and March 1.

	/s/ Eric Lentell, Attorney-in-Fact for Thomas Paul Muniz	03/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider activity did Archer Aviation (ACHR) report for Thomas Paul Muniz?

Archer Aviation reported that CTO Thomas Paul Muniz acquired Class A Common Stock through derivative exercises on March 1, 2026. These transactions reflect vested restricted stock units converting into shares at a stated price of $0.00 per share, rather than open-market buying or selling.

How many Archer Aviation (ACHR) shares were involved in the March 1, 2026 Form 4?

The filing lists several blocks of Class A Common Stock, including 143,750, 8,945, 7,718 and 7,612 shares. These arose from the vesting and conversion of restricted stock units into common shares, all reported at a transaction price of $0.00 per share.

What type of securities did Archer Aviation (ACHR) CTO Muniz convert on March 1, 2026?

Thomas Paul Muniz converted Restricted Stock Units into Class A Common Stock. Each restricted stock unit represents a contingent right to receive one Class A share, subject to his continued service, and the reported transactions reflect that conversion on March 1, 2026.

How do Archer Aviation (ACHR) restricted stock units vest for CTO Thomas Paul Muniz?

The filing states that certain awards vest as 1/4 on May 15, 2024, then 1/16 quarterly, while others vest 1/12 quarterly starting March 1, 2025 or March 1, 2026. Vesting dates include March 1, May 15, August 15 and November 15 in various schedules.

Do Archer Aviation (ACHR) restricted stock units held by Muniz expire?

According to the disclosure, these restricted stock units do not expire. Instead, they either vest according to their quarterly schedules or are cancelled before their vesting dates, meaning their outcome depends on continued service and award terms rather than a traditional expiration date.

Was the Archer Aviation (ACHR) Form 4 for Muniz a purchase or sale of shares?

The Form 4 classifies all reported transactions as exercises or conversions of derivative securities, not open-market purchases or sales. They are coded “M” and described as exercises or conversions of restricted stock units into Class A Common Stock at a reported price of $0.00 per share.