Archer says HSR waiting period expires for Boeing Wisk, Insitu and SkyGrid deal

Archer Aviation Inc. (NYSE: ACHR) said the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act expired with respect to its previously announced agreements to acquire Boeing’s Wisk Aero, SkyGrid, and Insitu subsidiaries, according to a Form 8-K and accompanying press release furnished Sept. 24.

The HSR waiting period expired at 11:59 p.m. EDT on Sept. 18, the company said, satisfying a key condition to closing. Completion remains subject to other customary closing conditions, including certain other regulatory approvals that are underway. Archer said the transaction is expected to close by the end of 2026.

Under the deal, Archer has agreed to acquire all of the equity interests of Wisk Aero LLC, SkyGrid, LLC, and Insitu, Inc., together with certain related entities. The company pointed to a Form 8-K filed Aug. 10 for a fuller description of remaining conditions.

In the press release, Archer described the combination as creating an end-to-end physical AI platform for aerospace and defense, bringing together autonomy, eVTOL, unmanned aircraft systems, and airspace intelligence technologies with Archer’s product suite and AI foundation model ZEE.

By the numbers

• HSR waiting period expired: 11:59 p.m. EDT Sept. 18, 2026
• Expected close: by end of 2026 (subject to remaining conditions)
• Targets: Wisk Aero, Insitu, and SkyGrid (Boeing subsidiaries)

Sources

1. Archer Aviation Inc. Form 8-K, filed Sept. 24, 2026, accession 0001824502-26-000075
2. Archer Aviation Inc. Form 8-K Exhibit 99.1 press release, Sept. 24, 2026

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