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AI brief of an SEC Form 8-K · Personalis, Inc. (PSNL)

Personalis says U.S. antitrust waiting period for Tempus merger expired October 2

Neutral Impact 3 of 5 m&a Written later

Personalis disclosed that the waiting period under the Hart-Scott-Rodino Act for its proposed merger with Tempus AI expired at 11:59 p.m. Eastern time on October 2, 2026. The merger still requires Personalis stockholder approval at a meeting that has not yet been scheduled, along with other closing conditions.

Key points

  • HSR waiting period expired at 11:59 p.m. Eastern time on October 2, 2026, after Parent refiled its notification on September 2, 2026.
  • Closing still requires Company Stockholder Approval at a virtual stockholders meeting, with the date and time to be determined and announced.
  • The Merger Agreement, signed July 20, 2026, provides for two mergers that leave Personalis as a wholly owned subsidiary of Tempus.

The filing

CompanyPersonalis, Inc. (PSNL)
Form8-K, current report
Filed with the SECOct 6, 2026, 4:05 PM ET
Accession number0001193125-26-415547

Items reported: 8.01 Other Events

Read the filing on SEC.gov ↗

Written by AI on Nov 9, 2026, 8:38 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on October 06, 2026.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.