Personalis, Inc. filed a Rule 425 communication on October 30, 2026, urging stockholders to vote in favor of its pending merger with Tempus AI, Inc. ahead of a Special Meeting scheduled for November 30, 2026.

Key Highlights

  • Merger consideration: Tempus' offer is $16.25 in Tempus Class A common stock, subject to collar terms, with Tempus holding the right to elect to pay up to 50% of the consideration in cash.
  • Premium cited: The filing states a 28% premium to the unaffected 30-day VWAP and a 64% premium to the unaffected 90-day VWAP.
  • Collar mechanism: If the Tempus Stock Price exceeds $48.42, the exchange ratio equals $16.25 divided by the Tempus Stock Price; if it equals or falls below $48.42, the exchange ratio is fixed at 0.3356.
  • Unanimous board recommendation: Personalis' Board of Directors unanimously recommends a "FOR" vote on the merger proposal and related proposals.
  • Special Meeting: The stockholder vote is set for Monday, November 30, 2026, at 12:00 p.m. ET.
  • Proxy materials: The registration statement on Form S-4 was declared effective by the SEC on October 21, 2026, and the definitive proxy statement/prospectus was mailed to stockholders on or about that date.

Personalis Board Presents Case for the Tempus AI Combination

According to the filing, Personalis (NASDAQ:PSNL) is a genomic sequencing company that provides advanced cancer testing services to biopharma partners and clinicians. The Rule 425 communication argues that combining with Tempus AI would give Personalis access to a broader commercial infrastructure, additional investment capital, and the scale the company's board believes is necessary to compete in what the filing describes as a large minimum residual disease market.

The filing discloses that Personalis' Board conducted a process that included engagement with other potential buyers and extensive negotiations with Tempus to improve the value of Tempus' offer before arriving at the $16.25 per share figure. The board's communication also flags execution risk as a factor: the filing states that Personalis "would need to raise substantial financing that would dilute stockholders to compete on its own" as a standalone company, citing competition from "established and highly funded incumbents."

The filing includes a third-party analyst quote from BTIG, noting that permission to use the quote "was neither sought nor obtained." The communication contains forward-looking statements regarding anticipated benefits, synergies, and timing of the proposed transaction, and the filing cautions that these statements are subject to risks and uncertainties, including the possibility that stockholders may not approve the merger agreement or that a closing condition may not be satisfied.

What Was Disclosed

Personalis filed a Rule 425 stockholder communication on October 30, 2026, setting out the Board's unanimous recommendation to vote in favor of merging with Tempus AI at a stated consideration of $16.25 per share in Tempus Class A common stock, subject to a collar and a partial cash election right.