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  4. [Form 4] Archer Aviation Inc. Insider Trading Activity

Archer Aviation (NYSE: ACHR) exec sells shares to cover RSU taxes

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

Rhea-AI Filing Summary

Archer Aviation Inc. (ACHR) reported insider equity activity by Benjamin Lyon, President, Aircraft OEM. On August 15, 2026, two tranches of 54,383 and 41,164 restricted stock units were settled into the same number of Class A Common shares at a $0.00 exercise price, pursuant to quarterly vesting schedules. On August 17, 2026, Lyon sold 50,188 Class A shares at a weighted average price of $6.4128 per share, in multiple trades between $6.32 and $6.485, to satisfy tax withholding obligations arising from the RSU vesting.

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Insights

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Insider Lyon Benjamin
Role President, Aircraft OEM
Sold 50,188 shs ($322K)
Approx. gross sale proceeds $322K
Type Security Shares Price Value
Sale Class A Common Stock F1, F2 50,188 $6.4128 $322K
Exercise Restricted Stock Units F3, F4, F5 54,383 $0.00 $0.00
Exercise Restricted Stock Units F3, F6, F5 41,164 $0.00 $0.00
Exercise Class A Common Stock 54,383 $0.00 $0.00
Exercise Class A Common Stock 41,164 $0.00 $0.00
Holdings After Transaction: Restricted Stock Units — 696,774 shares (Direct); Class A Common Stock — 45,359 shares (Direct)
Footnotes (6)
  1. F1. Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of restricted stock units.
  2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.32 to $6.485 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.
  3. F3. 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.
  4. F4. The award vested or vests quarterly in ratable increments, with the first tranche vested on May 15, 2025, and vesting thereafter on August 15, November 15, March 1, and May 15.
  5. F5. These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date.
  6. 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 vesting thereafter on May 15, August 15, November 15, and March 1.
Shares sold 50,188 shares Class A Common Stock sold on August 17, 2026
Weighted average sale price $6.4128 per share Price for 50,188 shares of Class A Common Stock sold
Sale price range $6.32–$6.485 per share Range of prices for the multiple sale transactions on August 17, 2026
RSUs settled (award 1) 54,383 units Restricted stock units settled into Class A Common Stock on August 15, 2026
RSUs settled (award 2) 41,164 units Restricted stock units settled into Class A Common Stock on August 15, 2026
Total derivative exercises 95,547 shares Aggregate shares underlying derivatives exercised (M-code) in this filing
restricted stock unit financial
"Each restricted stock unit represents a contingent right to receive one share"
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
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
"sold to satisfy tax withholding obligations incurred in connection with the vesting"
service provider financial
"subject to the reporting person's continued status as a service provider"

FAQ

What insider transactions did ACHR executive Benjamin Lyon report in this Form 4?
Benjamin Lyon reported vesting and settlement of 54,383 and 41,164 restricted stock units into Class A shares, followed by a sale of 50,188 shares on August 17, 2026 to cover tax withholding obligations from that vesting.

How many Archer Aviation (ACHR) shares did Benjamin Lyon sell and at what price?
Benjamin Lyon sold 50,188 ACHR Class A shares at a weighted average price of $6.4128 per share. The shares were sold in multiple transactions with prices ranging from $6.32 to $6.485 per share, inclusive.

Why were Benjamin Lyon’s ACHR shares sold according to this Form 4 filing?
The filing states the 50,188 shares of Archer Aviation Class A Common Stock were sold to satisfy tax withholding obligations incurred in connection with the vesting of Lyon’s restricted stock units, rather than as a discretionary open-market sale for other purposes.

What RSU vesting activity did Archer Aviation (ACHR) disclose for Benjamin Lyon?
Two awards of restricted stock units vested and settled into Class A shares: 54,383 RSUs and 41,164 RSUs. Each RSU represents a contingent right to receive one share, subject to Lyon’s continued status as a service provider to Archer Aviation.

What are the vesting schedules for Benjamin Lyon’s ACHR restricted stock units?
One RSU award vests quarterly in ratable increments, first on May 15, 2025, then on August 15, November 15, March 1, and May 15. Another vests quarterly as to 1/12 of the total, first on March 1, 2026, then May 15, August 15, November 15, and March 1.

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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*
Lyon Benjamin
(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)
President, Aircraft OEM
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/15/2026		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 Stock08/15/2026M54,383A$054,383D
Class A Common Stock08/15/2026M41,164A$095,547D
Class A Common Stock08/17/2026S(1)50,188D$6.4128(2)45,359D
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(3)08/15/2026M54,383 (4) (5)Class A Common Stock54,383$0326,298D
Restricted Stock Units(3)08/15/2026M41,164 (6) (5)Class A Common Stock41,164$0370,476D
Explanation of Responses:
1. Represents shares of Class A Common Stock sold to satisfy tax withholding obligations incurred in connection with the vesting of restricted stock units.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.32 to $6.485 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.
3. 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.
4. The award vested or vests quarterly in ratable increments, with the first tranche vested on May 15, 2025, and vesting thereafter on August 15, November 15, March 1, and May 15.
5. These restricted stock units do not expire; they either vest or are cancelled prior to the vesting date.
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 vesting thereafter on May 15, August 15, November 15, and March 1.
/s/ Eric Lentell, Attorney-in-Fact for Benjamin Lyon08/18/2026
** 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