Archer Aviation officer plans sale of 45K shares

An Archer Aviation officer filed a Rule 144 notice to sell 45,359 Class A shares, after selling 50,188 shares in August 2026.

Rhea-AI Filing Summary

Archer Aviation Inc. (ACHR) officer Benjamin Lyon has filed a Rule 144 notice covering a proposed sale of 45,359 shares of Class A common stock. The shares are tied to restricted stock vesting on August 15, 2026, and the planned sale is listed for trading on the NYSE.

The filing also reports that Lyon previously sold 50,188 Class A shares on August 17, 2026. Fidelity Brokerage Services LLC is identified as the broker, acting under a power of attorney for Lyon.

Key Figures

Shares proposed for sale: 45,359 shares Aggregate market value of proposed sale: $246,299.37 Shares previously sold in last 3 months: 50,188 shares +3 more

6 metrics

Shares proposed for sale 45,359 shares Class A common stock under Rule 144 notice

Aggregate market value of proposed sale $246,299.37 Value of 45,359 Class A shares in the Rule 144 notice

Shares previously sold in last 3 months 50,188 shares Class A shares sold by Benjamin Lyon on August 17, 2026

Aggregate proceeds from prior sale $321,845.60 Sale of 50,188 Class A shares on August 17, 2026

Vesting date of restricted stock August 15, 2026 Restricted stock vesting that is the source of 45,359 shares

Security class Class A common stock Archer Aviation Inc. shares subject to the Rule 144 notice

Key Terms

Rule 144, restricted stock vesting, attorney-in-fact, aggregate sale price

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock vesting financial

"Class A | 08/15/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as attorney-in-fact for Benjamin Lyon"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

aggregate sale price financial

"08/17/2026 | 50188 | 321845.60"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Archer Aviation (ACHR) disclose in this Form 144 filing?

The filing states that officer Benjamin Lyon intends to sell 45,359 shares of Archer Aviation Class A common stock under Rule 144, with the shares associated with restricted stock vesting on August 15, 2026 and to be sold on the NYSE.

How many Archer Aviation (ACHR) shares are proposed for sale by Benjamin Lyon?

Benjamin Lyon proposes to sell 45,359 shares of Archer Aviation Class A common stock. The filing lists an aggregate market value of $246,299.37 for these shares at the time of the notice.

What prior sales by Benjamin Lyon in ACHR stock are reported in this Form 144?

The notice reports that on August 17, 2026, Benjamin Lyon sold 50,188 shares of Archer Aviation Class A common stock, for an aggregate sale price of $321,845.60 over the prior three months.

What is the source of the Archer Aviation (ACHR) shares to be sold?

The 45,359 shares to be sold are identified as restricted stock vesting on August 15, 2026, acquired from the issuer as compensation, according to the Rule 144 notice.

Who is the broker involved in the Archer Aviation (ACHR) Form 144 sale?

The filing identifies Fidelity Brokerage Services LLC as the broker for the proposed sale of 45,359 Class A shares of Archer Aviation, and the form is signed by Jennifer Ruchti as a duly authorized representative and attorney-in-fact for Benjamin Lyon.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/21/2026 - 12:10 PM Accepted by SEC EDGAR 09/21/2026 - 12:09 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001870608
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Archer Aviation Inc.
SEC File Number	001-39668
Address of Issuer	190 WEST TASMAN DRIVE SAN JOSE CALIFORNIA 95134
Phone	650-272-3233
Name of Person for Whose Account the Securities are To Be Sold	Lyon Benjamin
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	45359	246299.37	770023800	09/21/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	08/15/2026	Restricted Stock Vesting	Issuer			45359	08/15/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Benjamin Lyon 190 West Tasman Drive San Jose CA 95134	Class A	08/17/2026	50188	321845.60

144: Remarks and Signature

Remarks
Date of Notice	09/21/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/21/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Benjamin Lyon
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)