Thomas Paul Muniz - 01 Mar 2026 Form 4 Insider Report for Archer Aviation Inc. (ACHR)

Role: CHIEF TECHNOLOGY OFFICER
Signature: /s/ Eric Lentell, Attorney-in-Fact for Thomas Paul Muniz
Issuer symbol: ACHR
Transactions as of: 01 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 03 Mar 2026, 20:27:08 UTC
Previous filing: 11 Feb 2026
Next filing: 09 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Muniz Thomas Paul	CHIEF TECHNOLOGY OFFICER	C/O ARCHER AVIATION INC., 190 WEST TASMAN DRIVE, SAN JOSE	/s/ Eric Lentell, Attorney-in-Fact for Thomas Paul Muniz	03 Mar 2026	0001882348

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ACHR	Class A Common Stock	Options Exercise	$0	+143,750	+11%	$0.000000	1,415,879	01 Mar 2026	Direct
transaction	ACHR	Class A Common Stock	Options Exercise	$0	+8,945	+0.63%	$0.000000	1,424,824	01 Mar 2026	Direct
transaction	ACHR	Class A Common Stock	Options Exercise	$0	+7,612	+0.53%	$0.000000	1,432,436	01 Mar 2026	Direct
transaction	ACHR	Class A Common Stock	Options Exercise	$0	+7,718	+0.54%	$0.000000	1,440,154	01 Mar 2026	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ACHR	Restricted Stock Units	Options Exercise	$0	-143,750	-17%	$0.000000	718,750	01 Mar 2026	Class A Common Stock	143,750		Direct	F1, F2, F3
transaction	ACHR	Restricted Stock Units	Options Exercise	$0	-8,945	-11%	$0.000000	71,564	01 Mar 2026	Class A Common Stock	8,945		Direct	F1, F3, F4
transaction	ACHR	Restricted Stock Units	Options Exercise	$0	-7,612	-13%	$0.000000	53,277	01 Mar 2026	Class A Common Stock	7,612		Direct	F1, F3, F5
transaction	ACHR	Restricted Stock Units	Options Exercise	$0	-7,718	-8.3%	$0.000000	84,901	01 Mar 2026	Class A Common Stock	7,718		Direct	F1, F3, F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.
F2	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.
F3	These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date.
F4	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.
F5	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.
F6	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.