Archer Aviation to acquire Boeing's Wisk, SkyGrid, Insitu in stock-and-warrant deal

What happened

On August 9, 2026, Archer Aviation Inc. (NYSE: ACHR), an electric vertical takeoff and landing aircraft maker based in San Jose, California, entered into a definitive agreement to acquire all of the equity interests of Wisk Aero LLC, SkyGrid LLC, and Insitu Inc. from The Boeing Company, along with related entities. The deal also includes Wisk Australia, Insitu Pacific, and Boeing Emirates.

As consideration, Archer will issue to Boeing a number of new Class A common shares equal to 19.75% of Archer's outstanding shares as of just before closing, subject to adjustments based on the target companies' cash and debt. Archer will also issue two warrants: one to buy shares worth $100 million at $13.00 per share (exercisable 12 to 36 months after closing) and another to buy shares worth $100 million at $17.88 per share (exercisable 12 to 48 months after closing). The shares and warrants are being issued in a private placement exempt from SEC registration.

Boeing has agreed not to sell or transfer the consideration shares for 12 months after closing, with customary exceptions for hedging and pledging. The warrants carry a 19.9% beneficial ownership limitation that Boeing can waive.

The acquisition is expected to close subject to regulatory approvals and other conditions, including expiration of the Hart-Scott-Rodino waiting period and national security reviews. If not closed by May 9, 2027, either party can walk away, with a possible three-month extension.

Archer's stock closed at $6.29 on August 10, down 7.36% from the previous close of $6.79.

The company filed an 8-K with the SEC to report the agreement, covering items 1.01 (material agreement), 3.02 (unregistered sale of equity), and 7.01 (Regulation FD disclosure).

The filing

An 8-K is a current report that public companies must file with the SEC within four business days of a significant event that shareholders should know about. Item 1.01 covers entering into a material definitive agreement — here, the equity purchase agreement with Boeing. Item 3.02 covers the unregistered sale of equity securities, meaning the new shares and warrants are being issued without an SEC registration statement, relying on an exemption under Section 4(a)(2) of the Securities Act. Item 7.01 is for Regulation FD disclosure, which allows companies to disclose material information to the public in a way that ensures fair access.

The filing includes several exhibits: the purchase agreement as Exhibit 2.1, forms of the warrants as Exhibits 4.1 and 4.2, and forms of related agreements like the registration rights agreement and governance side letter.

What this means

When a company issues shares as payment, as Archer is doing, existing shareholders' ownership is diluted — each share now represents a smaller slice of the company. Here, Boeing will own roughly 19.75% of Archer post-closing, making it a major shareholder. Because 19.75% is below 20%, it likely avoids triggering certain stock exchange shareholder approval requirements, though the warrants could push ownership higher if exercised.

The warrants give Boeing the right to buy additional shares at fixed prices later. The first at $13.00 and the second at $17.88 — well above the current $6.29 price — so they only become valuable if Archer's stock rises substantially. That ties Boeing's further upside to Archer's performance. The warrants have a three-year and four-year exercise window, and they include a 19.9% ownership cap to keep Boeing from gaining control without going through a shareholder vote.

The deal is partly stock and partly warrants, which is a structure that lets Archer conserve cash while giving Boeing a stake in the combined company's future. The lock-up prevents Boeing from immediately dumping shares, and the registration rights agreement obligates Archer to file a resale registration statement so Boeing can eventually sell the shares publicly.

Wisk Aero is an autonomous air taxi developer, SkyGrid provides airspace management software, and Insitu makes unmanned aircraft systems — so the acquisition is meant to broaden Archer's portfolio beyond its own eVTOL aircraft into autonomy, airspace integration, and drones. The filing does not state why Boeing is selling these units, nor does it explain the stock price drop, though such announcements often lead to selling as investors assess dilution and integration risk.

What happens next: Archer must seek regulatory clearances, including antitrust and foreign investment reviews. If all conditions are met, the deal closes and Boeing gets its shares and board seat (if it maintains at least 10% ownership). Archer has also agreed to call a special shareholder meeting within 60-90 days to seek any required stockholder approval for the warrants, and if that approval isn't obtained, the warrants would be exchanged for cash-settled replacement warrants.