Summary

  • Personalis holders must approve the merger agreement by a majority of all outstanding shares entitled to vote. Tempus holders do not vote on the agreement, the merger or the related share issuance.
  • Tempus may elect, at any time before the third business day before closing, to pay US$16.25 in cash for up to 50% of outstanding Personalis shares. The election applies pro rata; Personalis holders do not choose an individual cash percentage.
  • At or below a defined Tempus Stock Price of US$48.42, the exchange ratio is 0.3356. Above US$48.42, it becomes US$16.25 divided by that price. Below US$46, Personalis may terminate after the ratio is finally determined, but termination is not automatic.
  • The preliminary S-4 leaves the meeting date, record date and several record-date figures blank. Unless Tempus elects cash before the meeting, voters will not know the number of Tempus shares, cash amount or total consideration value they will receive.

The vote comes first. The buyer’s choice can come later.

That sequence is the central fact in Tempus AI’s proposed acquisition of Personalis. It is also easy to lose inside the familiar language of a US$16.25-per-share transaction. A single amount suggests a settled package. The preliminary Form S-4 describes something more conditional: a stock formula whose measurement occurs near closing, an option held by Tempus to substitute cash for as much as half of the outstanding target shares, and a separate right held by Personalis if Tempus’s defined stock price falls below US$46.

Each part is disclosed. Their order determines who has information and who has control.

The ballot approves a decision tree

Personalis needs the affirmative vote of holders of a majority of all outstanding common shares entitled to vote. An abstention or failure to vote has the same effect as a vote against the merger proposal. Tempus shareholders, by contrast, are not required to adopt the agreement, approve the mergers or approve the issuance of Tempus Class A shares for the transaction.

The asymmetry does not make the vote defective. It defines the contract being submitted. Personalis voters decide whether to accept a tree of future outcomes rather than one known mix of cash and stock.

The S-4 says that at the time of their decision, holders will not know how many Tempus shares they will receive, how much cash they will receive or the total value of that consideration—unless Tempus happens to make its cash election before the special meeting. The special-meeting date and record date remain blank in the preliminary filing. So do several record-date ownership and share-count fields. Any article that supplies those missing values would be writing a later document that does not yet exist.

The preliminary filing does provide one dated ownership snapshot. As of 20 July, Merck and Tempus represented about 13% and 12% of Personalis voting power. Merck signed a voting agreement, and Tempus agreed under the merger agreement to vote its Personalis shares in favor, subject to the filed terms. Those percentages are not final record-date voting power. They show that two disclosed holders already occupied roughly one quarter of the announcement-date electorate, not how the final meeting will be tallied.

Approval will not close the transaction. It will satisfy one condition. Effectiveness of the S-4, approval to list the new Tempus shares, regulatory conditions and the absence of a prohibitory law or order remain separate receipts.

“Up to 50%” belongs to Tempus

Tempus can deliver written notice at any time before the third business day before closing and elect to pay US$16.25 in cash for up to 50% of outstanding Personalis shares. If it does, the same pro rata portion of each eligible holder’s shares receives cash; the remainder receives stock under the exchange formula.

This is not an election form for Personalis investors. One holder cannot ask for all cash while another asks for all stock. The buyer selects the aggregate cash share, and the result is spread evenly across eligible holders.

The ceiling is also not a promised 50/50 split. “Up to” includes zero. The cash-share number can be reduced if necessary to preserve the intended tax treatment. The executed agreement uses a stock-value threshold in that calculation. The final mix therefore depends first on Tempus’s choice and then, where relevant, on a tax-preservation constraint.

The Personalis board’s own scenario illustrates what changes. Based on share data as of 17 July, former Personalis holders were estimated to own about 14.80% of the post-transaction Tempus Class A shares if Tempus made no cash election, and about 8.00% if it did. These are not final percentages. They reveal the economic purpose: cash reduces the number of acquisition shares and therefore the target holders’ continuing participation in the combined company.

Liquidity and dilution move in opposite directions. More cash gives former Personalis holders more immediate certainty and less exposure to Tempus after closing. More stock preserves buyer cash and gives the sellers a larger continuing claim, while diluting existing Tempus Class A holders more heavily. Tempus holds the switch.

US$48.42 caps formula upside; US$46 opens a choice

The stock formula has two thresholds that should not be merged.

If the defined Tempus Stock Price is at or below US$48.42, each eligible Personalis share receives 0.3356 Tempus Class A share for the stock portion. If that price is above US$48.42, the ratio becomes US$16.25 divided by the Tempus Stock Price.

For the ordinary case, the price is a 15-consecutive-trading-day Nasdaq VWAP ending before the last trading day before closing. The value is therefore not set by the announcement-day close or the vote-day close. It will be known only shortly before closing.

Above US$48.42, a rising Tempus price produces fewer shares. The formula keeps the implied stock consideration at US$16.25 at the measurement price. Personalis holders do not retain additional pre-closing formula upside in that zone.

At or below US$48.42, the ratio stops rising and remains 0.3356. The stock value then falls with Tempus. At US$48.42, multiplication gives about US$16.25, subject to rounding. At an illustrative US$47, the same ratio is worth about US$15.77. That is an application of the filed formula, not a forecast or an estimate of what holders will ultimately receive.

US$46 is a different boundary. If the finally determined Tempus Stock Price is below US$46, Personalis may terminate the merger agreement, but only after the ratio has been finally determined and by the stated closing-morning deadline. The agreement does not cancel itself. Personalis may choose not to exercise the right, in which case the fixed ratio could deliver materially less than the value implied when shareholders voted.

The correct map is therefore three-part: above US$48.42, formula value is capped through a declining ratio; from US$46 to US$48.42, 0.3356 exposes holders to price movement; below US$46, that exposure is joined by a target-company decision right. A walkaway option is protection only if the board can and does use it.

Negotiation moved the choice from seller to buyer

The background section makes the allocation of authority unusually visible.

On 16 July, Personalis’s proposed structure contemplated an all-stock transaction with a cash election at Personalis holders’ option for up to 25% of total consideration. It also contemplated a two-way collar. Two days later, Tempus’s advisers communicated a revised structure after discussions about controlling dilution: Tempus would be able to elect cash for up to 50%, with the remaining consideration in stock, alongside one-way downside protection and a Personalis walkaway right.

That change matters more than the word “flexibility.” The initial idea gave recipients a limited choice over the form of their own consideration. The agreed approach gives the buyer a larger choice over the entire pool. The S-4 says Tempus may make the election because it is in the interests of Tempus and its current shareholders, whose interests differ from those of Personalis shareholders.

This is not evidence that Tempus will choose cash. It is evidence of why the right sits where it does. The buyer wanted control over dilution, and the final mechanism supplies it.

Balance sheets show scale, not a funding commitment

The dated accounts explain why the decision has consequence without resolving it.

Personalis’s June-quarter Form 10-Q reports US$212.7 million of cash, cash equivalents and short-term investments at 30 June, a US$61.7 million net loss for the first half and a US$693.0 million accumulated deficit. Those figures make waiting time and transaction certainty material. They do not prove that Personalis cannot remain independent or that the merger is superior to every alternative.

Tempus’s June-quarter Form 10-Q reports US$599.6 million of cash and cash equivalents and US$216.4 million of marketable equity securities. The categories are dated and distinct. Neither is a commitment to fund the cash election. The S-4 does not provide a completed sources-and-uses schedule for an election Tempus has not made.

The contract’s initial outside date is 20 April 2027. In specified circumstances where regulatory conditions remain and the other stated conditions have been met or waived, it can extend to 20 October 2027 and then 20 April 2028. A long pending period can change both balance sheets before the cash decision and VWAP arrive.

The US$76,806,179 termination fee also belongs on a narrow ledger. It applies in specified paths; it is not a universal payment if the deal fails, a shareholder top-up or proof that either party expects termination.

The 20 July Form 8-K records the signed transaction. The later S-4 records the choices that remain. Confusing those layers turns an agreement into a receipt and a headline amount into a guaranteed outcome.

Sources