Archer Aviation (ACHR) CTO auto-sells 9,580 shares for tax withholding

Rhea-AI Filing Summary

Archer Aviation Inc. reported that Chief Technology Officer Thomas Paul Muniz sold 9,580 shares of Class A common stock on March 13, 2026 at a weighted average price of $6.2749 per share. According to the disclosure, these shares were automatically sold to satisfy tax withholding obligations arising from the vesting of a 2025 performance-based restricted stock unit award, consistent with company policy. After this transaction, Muniz directly holds 1,352,208 shares of Archer Aviation’s Class A common stock, indicating this was a small, routine disposition tied to compensation rather than a discretionary open-market sale.

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)
03/13/2026

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	03/13/2026		S(1)		9,580	D	$6.2749(2)	1,352,208	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. Represents shares of the issuer's Class A common stock sold to satisfy the reporting person's tax withholding obligations, which were incurred in connection with the vesting of the 2025 PRSU Award, which vesting was separately reported on a Form 4 filed with the U.S. Securities and Exchange Commission on March 12, 2026. In accordance with company policy, shares are automatically sold to cover such obligations.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.225 to $6.315 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

	/s/ Eric Lentell, Attorney-in-Fact for Thomas Paul Muniz	03/16/2026
	** 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).
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FAQ

What insider transaction did Archer Aviation (ACHR) disclose for Thomas Paul Muniz?

Archer Aviation disclosed that Chief Technology Officer Thomas Paul Muniz sold 9,580 shares of Class A common stock. The sale occurred on March 13, 2026 and was reported as an open-market transaction in a Form 4 insider trading report.

Why did Archer Aviation CTO Thomas Paul Muniz sell 9,580 ACHR shares?

The 9,580 Archer Aviation shares were sold to cover Muniz’s tax withholding obligations from the vesting of a 2025 performance-based RSU award. The disclosure notes company policy automatically triggers such sales to satisfy tax liabilities related to equity compensation.

At what price were Thomas Paul Muniz’s Archer Aviation shares sold?

Muniz’s Archer Aviation shares were sold at a weighted average price of $6.2749 per share. The filing explains the shares were executed in multiple trades between $6.225 and $6.315 per share, with detailed trade breakdowns available upon request.

How many Archer Aviation (ACHR) shares does Thomas Paul Muniz own after this Form 4 sale?

Following the sale, Thomas Paul Muniz directly owns 1,352,208 shares of Archer Aviation Class A common stock. This indicates the 9,580 shares sold represent a small portion of his overall holdings, which remain significant after the tax-related disposition.

Was the Archer Aviation CTO’s March 2026 sale a discretionary trade or automatic?

The Archer Aviation CTO’s March 2026 sale was automatic under company policy. The filing states the shares were sold specifically to cover tax withholding obligations triggered by the vesting of a 2025 performance-based RSU award, rather than a discretionary open-market decision.

What award triggered the tax-withholding sale reported by Archer Aviation (ACHR)?

The tax-withholding sale was triggered by the vesting of a 2025 performance-based restricted stock unit (PRSU) award. The Form 4 notes that this vesting event had been reported separately and that the resulting tax obligations required an automatic sale of shares.