Booz Allen closes its acquisition of Ultra Electronics Advanced Tactical Systems — a U.S. unit carved out from its U.K. parent — SEC 8-K (August 2026)

1Disclosing that it closed

An acquisition is often disclosed twice: once when it is agreed, once when it actually closes. The 8-K Booz Allen filed on August 24, 2026 is the second kind, reporting that the previously announced acquisition of Ultra Electronics Advanced Tactical Systems closed that day.

Regulatory approvals and conditions precedent sit between agreement and closing, which is why the fact of closing is treated as a material event in its own right.

2Who bought what from whom

Set out the parties to the stock purchase agreement and the shape of the transaction emerges: a major U.S. defense and intelligence services firm acquiring, share by share, a U.S. entity held by a U.K. parent group. Buying the shares of the company rather than carving out particular assets or contracts means existing contractual relationships and authorizations stay in place while only ownership changes hands.

3Ownership moving across a border

The target is a Texas corporation, and the business at the center of the transaction is domestic to the United States. The sellers, however, are both private limited companies incorporated under the laws of England and Wales. The transaction therefore moves ownership of a U.S. defense-related business from a U.K. group to a U.S. company.

In defense and security work the domicile of an owner can carry regulatory weight, which is part of why the jurisdiction of organization of each party is spelled out in the 8-K. The filing does not state a purchase price.

4Where the disclosure sits

The 8-K is reported under Item 8.01 (other events) and Item 9.01 (financial statements and exhibits), with the detail left to the press release filed as Exhibit 99.1. Of the 644 SEC filings this site holds as of 2026-09-02, 442 are 8-K family filings; 73 include Item 8.01, while only 3 include Item 2.01, which covers completed acquisitions or dispositions of assets.

Which item a closing lands in varies with the size and significance of the transaction, and here 8.01 was chosen.