Archer Aviation Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549​

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Your vote is important. Whether or not you plan to attend the annual meeting, please cast your vote as soon as

possible by internet,

telephone, or by mail.

ADAM GOLDSTEIN

Founder & Chief Executive Officer

TO OUR STOCKHOLDERS:

I founded Archer with a single vision: to make flying taxis an every day reality. Seven years later, that vision has grown into something larger. Archer is now a next-generation aerospace company building the technologies that I believe will power the next 100 years of flight — across commercial aviation and defense.

We operate in one of the most competitive and technically demanding industries in the world. Success demands more than execution. It requires making bold decisions early, sometimes before the path is obvious to everyone else. The decision about where Archer is legally incorporated may not sound like a strategic priority, but we believe it is.

Our board of directors and management have closely studied the regulatory and legal landscape across the country, and after rigorous analysis, we are recommending that our stockholders approve making Texas our legal home (i.e., changing Archer’s state of incorporation from Delaware to Texas, see Proposal 2). We believe Texas’ business-friendly approach positions us to move faster and build deeper roots in a state that is highly supportive of our industry and where we plan to have significant operations over the long-term. On the other hand, other than being incorporated there, we don’t have any ties or plans to operate in Delaware.

Deep tech is hard, but the opportunities are immense, and your belief in us gives us the ability to pursue those opportunities. I do not take your support for granted, and we will continue to work every day to earn it.

Sincerely,

Notice of Annual Meeting of Stockholders

And other business as may properly come before the Annual Meeting and any postponements or adjournments thereof.

These materials were first sent or made available to stockholders on April 30, 2026

WHETHER OR NOT YOU PLAN TO ATTEND THE ANNUAL MEETING, WE ENCOURAGE YOU TO VOTE AND SUBMIT YOUR PROXY THROUGH THE INTERNET OR BY TELEPHONE OR REQUEST AND SUBMIT YOUR SIGNED AND DATED PROXY CARD BY MAIL AS SOON AS POSSIBLE, SO THAT YOUR SHARES MAY BE REPRESENTED AT THE MEETING.

By Order of the Board of Directors,

ERIC LENTELL

Chief Strategy & Legal Officer

2026 Proxy Statement 2