Tempus AI shares are down about 3% in Wednesday trading, with the main near-term catalyst being positioning ahead of its upcoming first-quarter 2026 earnings release on Tuesday, May 5, 2026. With the report less than a week away, short-term traders often reduce exposure in volatile growth-healthcare names, and TEM is seeing that pre-earnings risk trimming. (investors.tempus.com)

Sentiment is also being weighed down by fresh market attention on insider-selling activity reported in recent filings and aggregated trading trackers, which can create an overhang even when the sales are pre-planned or non-fundamental. In TEM’s case, the latest flagged activity includes CEO Eric P. Lefkofsky sales reported in late March 2026, which is re-circulating as the stock heads into earnings. (marketbeat.com)

The next definitive catalyst is the May 5 earnings release and conference call, where investors will focus on revenue growth and any commentary on margin progression and 2026 outlook. Street expectations cited in earnings-preview coverage call for a quarterly loss and mid-$300M revenue, making the setup sensitive to any upside/downside variance or guidance tone. (marketbeat.com)