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Archer Aviation (NYSE: ACHR) CTO sells shares to cover RSU tax obligations

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Archer Aviation Inc.’s Chief Technology Officer, Thomas Paul Muniz, reported multiple stock transactions. On May 15 and May 18, 2026, he sold a total of 136,579 shares of Class A Common Stock at weighted average prices around $6 per share. Footnotes state these shares were sold to satisfy tax withholding obligations tied to the vesting of restricted and performance restricted stock units, rather than discretionary sales. On May 15, several awards of restricted stock units were also converted into a total of 168,026 shares of Class A Common Stock. Following these transactions, Muniz directly holds 1,462,314 shares of Class A Common Stock.

Positive

  • None.

Negative

  • None.
Insider Muniz Thomas Paul
Role CHIEF TECHNOLOGY OFFICER
Sold 136,579 shs ($818K)
Type Security Shares Price Value
Sale Class A Common Stock 91,839 $5.9527 $547K
Exercise Restricted Stock Units 143,750 $0.00 --
Exercise Restricted Stock Units 8,946 $0.00 --
Exercise Restricted Stock Units 7,611 $0.00 --
Exercise Restricted Stock Units 7,719 $0.00 --
Exercise Class A Common Stock 143,750 $0.00 --
Exercise Class A Common Stock 8,946 $0.00 --
Exercise Class A Common Stock 7,611 $0.00 --
Exercise Class A Common Stock 7,719 $0.00 --
Sale Class A Common Stock 44,740 $6.0611 $271K
Holdings After Transaction: Class A Common Stock — 1,462,314 shares (Direct, null); Restricted Stock Units — 575,000 shares (Direct, null)
Footnotes (1)
  1. Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of performance restricted stock units, which was separately reported on a Form 4 filed with the U.S. Securities and Exchange Commission on April 22, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.005 to $6.135 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 ranges set forth in this footnote and in footnote 4 of this Form 4. Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of restricted stock units. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.87 to $6.13 per share, inclusive. 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. 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. These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date. 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. 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. 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.
Shares sold May 15, 2026 44,740 shares at $6.0611/share Open-market sale of Class A Common Stock to satisfy tax withholding
Shares sold May 18, 2026 91,839 shares at $5.9527/share Open-market sale of Class A Common Stock to satisfy tax withholding
Total shares sold 136,579 shares Net sell shares across reported transactions
Shares after transactions 1,462,314 shares Total Class A Common Stock directly held after May 18, 2026
RSUs converted to shares 168,026 units Total restricted stock units exercised or converted into Class A shares
Price range footnote F2 $6.005–$6.135/share Multiple transactions underlying weighted average price on one sale date
Price range footnote F4 $5.87–$6.13/share Multiple transactions underlying weighted average price on another sale date
restricted stock units financial
"Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting 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.
performance restricted stock units financial
"Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of performance restricted stock units."
Performance restricted stock units (PRSUs) are promises to deliver company shares to employees or executives only if the business meets specific performance targets and any time-based holding rules. Think of them as a bonus that converts into stock only after set goals are reached, so investors watch PRSUs for two reasons: they can dilute existing shares if paid out, and they signal how closely management’s pay is tied to company performance.
weighted average price financial
"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.005 to $6.135 per share."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
tax withholding obligations financial
"Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of restricted stock units."
contingent right financial
"Each restricted stock unit represents a contingent right to receive one share of the issuer's Class A Common Stock."
vested or vests quarterly financial
"The award vested or vests quarterly as to 1/16 of the total award, with the first tranche vested on May 15, 2024."
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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).
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 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)
Director10% Owner
XOfficer (give title below)Other (specify below)
CHIEF TECHNOLOGY OFFICER
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Class A Common Stock05/15/2026M143,750A$01,574,617D
Class A Common Stock05/15/2026M8,946A$01,583,563D
Class A Common Stock05/15/2026M7,611A$01,591,174D
Class A Common Stock05/15/2026M7,719A$01,598,893D
Class A Common Stock05/15/2026S(1)44,740D$6.0611(2)1,554,153D
Class A Common Stock05/18/2026S(3)91,839D$5.9527(4)1,462,314D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(5)05/15/2026M143,750 (6) (7)Class A Common Stock143,750$0575,000D
Restricted Stock Units(5)05/15/2026M8,946 (8) (7)Class A Common Stock8,946$062,618D
Restricted Stock Units(5)05/15/2026M7,611 (9) (7)Class A Common Stock7,611$045,666D
Restricted Stock Units(5)05/15/2026M7,719 (10) (7)Class A Common Stock7,719$077,181D
Explanation of Responses:
1. Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of performance restricted stock units, which was separately reported on a Form 4 filed with the U.S. Securities and Exchange Commission on April 22, 2026.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.005 to $6.135 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 ranges set forth in this footnote and in footnote 4 of this Form 4.
3. Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of restricted stock units.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.87 to $6.13 per share, inclusive.
5. 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.
6. 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.
7. These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date.
8. 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.
9. 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.
10. 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 Muniz05/19/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR

FAQ

What did Archer Aviation (ACHR) CTO Thomas Paul Muniz report in this Form 4?

Thomas Paul Muniz reported sales and conversions of Archer Aviation Class A Common Stock. The filing shows tax-related sales of vested restricted stock units and performance restricted stock units, plus shares acquired from those vestings, with updated direct holdings after the transactions.

How many Archer Aviation (ACHR) shares did the CTO sell and at what prices?

Muniz sold 44,740 shares on May 15, 2026 at a weighted average price of $6.0611 and 91,839 shares on May 18, 2026 at a weighted average price of $5.9527. Footnotes note underlying trade ranges around $6 per share.

How many Archer Aviation (ACHR) shares does the CTO hold after these transactions?

After the reported transactions, Muniz directly holds 1,462,314 shares of Archer Aviation Class A Common Stock. This figure reflects the net effect of shares acquired from restricted stock unit vesting and shares sold to cover associated tax withholding obligations.

What restricted stock unit activity did Archer Aviation’s CTO report?

On May 15, 2026, several restricted stock unit awards converted into Class A Common Stock, including tranches of 7,719, 7,611, 8,946, and 143,750 units. Each restricted stock unit represents a contingent right to receive one Archer Aviation Class A share upon vesting.

How do the Archer Aviation (ACHR) CTO’s restricted stock units vest over time?

Footnotes explain different vesting schedules: some awards vest 1/4 on May 15, 2024 and 1/16 quarterly thereafter; others vest 1/16 quarterly starting May 15, 2024, or 1/12 quarterly starting March 1, 2025 or March 1, 2026, continuing on specified calendar dates.