Tempus AI (TEM) 10% Owner Eric Lefkofsky Sells 250,000 Shares

What Happened
Eric P. Lefkofsky, a reported 10% owner of Tempus AI (TEM), sold a total of 250,000 shares in open-market transactions on September 22, 2026, generating approximately $19,366,632 in proceeds (weighted-average price ≈ $77.47/share). The filings show multiple block sales at reported weighted-average prices of $76.57, $77.29, $78.23 and $78.86 (individual transactions and totals are listed on the Form 4). These were sales (S), not purchases.

Key Details

• Transaction date: September 22, 2026; Form 4 filed September 24, 2026 (appears filed within the usual two-business-day window).
• Total sold: 250,000 shares for total proceeds of ~$19.37 million; weighted-average price across all lots ≈ $77.47/share.
• Reported price ranges (per footnotes): sales occurred in multiple trades ranging from $75.83 up to $78.90; the filer offers to provide a breakdown of individual trade prices on request (footnotes F2, F4, F5, F6).
• One or more of the transactions were made pursuant to a Rule 10b5-1 trading plan adopted March 8, 2026 (footnote F1).
• Reporting person status and relationships noted in the filing: Lefkofsky is a 10% owner and controls or is affiliated with multiple entities and family foundations (footnote F3).
• Shares owned after the transactions: not disclosed in the materials you provided (the Form 4 should list post-transaction holdings if available).

Context

• S = Sale. Sales by insiders can be routine (especially when executed under a 10b5-1 plan) and do not by themselves prove a negative view of the company; 10b5-1 plans are pre-scheduled trading mechanisms.
• As a 10% owner (not necessarily an operating executive), Lefkofsky’s activity may reflect portfolio or estate planning, diversification, or pre-set plan terms rather than real-time views of company fundamentals.
• For retail investors: note the sale size (~$19.4M) is material in dollar terms but should be considered alongside other insider filings and company fundamentals before drawing investment conclusions.