This is a non-discretionary sell-to-cover filing for tax withholding, not a signal of insider bearishness. The CEO's ongoing compliance sales are routine for a post-IPO equity plan. Monitor the actual Form 4 filings to confirm execution, but no trading action is warranted based on this filing alone.
Price Chart
Executive Summary
Eric P. Lefkofsky, co-founder, CEO, and Chairman of Tempus AI, filed a Form 144 to sell 132,591 shares of Class A Common Stock, with an approximate market value of $6.85 million based on the filing date. The filing notes these sales are mandated by the issuer's equity incentive plan for tax withholding obligations ('sell to cover') and are not discretionary trades. While the dollar amount is notable for a CEO, the mandatory nature of the sales significantly reduces the signal of insider concern, making this a routine compliance event.
Key Facts
- Eric P. Lefkofsky (CEO, Director, 10% Stockholder) filed Form 144 to sell 132,591 shares of Class A Common Stock.
- Estimated aggregate market value of the proposed sale: approximately $6.85 million.
- The filing explicitly states the sales are 'mandated by the Issuer's election under its equity incentive plan to require the satisfaction of a tax withholding obligation to be funded by sell to cover transactions and do not represent discretionary trades by the reporting person.'
- The shares to be sold were acquired from restricted stock units (vested 06/13/2024) and performance stock units (vested 08/07/2025).
- The filing also reports recent non-discretionary sales by entities controlled by Lefkofsky (Blue Media, Gray Media, Lefkofsky Family Foundation, Vas.org Foundation) totaling over 582,500 shares in May, June, and July 2026, all described as sell-to-cover for tax withholding.
Financial Impact
Proposed sale of 132,591 shares valued at ~$6.85M, representing less than 0.1% of Tempus AI's $8.9B market cap.
Risk Factors
- The cumulative volume of non-discretionary sales by Lefkofsky-controlled entities (over 582,500 shares in Q2/Q3 2026) could create modest selling pressure if all execute.
- Form 144 is an intent to sell; the actual sale may not occur, but the filing signals the insider has considered it.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001114357-26-000029 |
| Document: 0001114357-26-000029-index.html | 0001114357-26-000029 |
| Document: 0001114357-26-000029.txt | 0001114357-26-000029 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 3, 2026 28d ago | Insider Cluster | $64.62 $62.21 | ▼ −3.73% | ▼ −2.52% | $76.41 (+18.25%) |
Sep 3, 2026 28d ago | Insider Cluster | $64.62 $62.21 | ▼ −3.73% | ▼ −2.52% | $76.41 (+18.25%) |
Sep 1, 2026 4w ago | Insider Cluster | $62.27 $61.28 | ▼ −1.59% | ▼ −1.67% | $76.41 (+22.71%) |
Aug 28, 2026 5w ago | Insider Cluster | $64.04 $64.62 | ▼ −0.91% | ▼ −0.80% | $76.41 (−19.32%) |
Aug 25, 2026 5w ago | 144 | $68.48 $61.94 | ▲ +9.55% | ▲ +9.43% | $76.41 (−11.58%) |
Aug 25, 2026 5w ago | Insider Cluster | $68.73 $62.27 | ▼ −9.40% | ▼ −8.86% | $76.41 (+11.17%) |
Aug 21, 2026 6w ago | Insider Cluster | $72.69 $64.04 | ▲ +11.90% | ▲ +12.37% | $76.41 (−5.12%) |
Aug 19, 2026 6w ago | 144 | $66.65 $70.69 | ▲ +6.06% | ▲ +4.95% | $76.41 (+14.64%) |
Aug 18, 2026 6w ago | Insider Cluster | $49.36 $68.73 | ▼ −39.24% | ▼ −39.44% | $76.41 (−54.80%) |
Aug 11, 2026 7w ago | Insider Cluster | $55.69 $49.36 | ▼ −11.37% | ▼ −10.96% | $76.41 (+37.21%) |
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