TOP TIERMARKET NEWSWIRE
Movers explained · 2026-07-21

Archived explainer. For the current picture see today's TEM page.

Why Is TEMPUS AI INC A (TEM) Stock Down Today?

By the Top Tier Newswire AI Desk · July 21, 2026 at 12:14 AM ET · reviewed against 21 wire stories

TEMPUS AI INC A (TEM) is down -7.74% in the latest session. Our newswire has captured 21 stories on TEM across 13 sources in the last 36 hours, with AI sentiment reading bullish (avg 58/100).

Tempus AI Inc. Class A (TEM) fell 7.74% to $48.41 on Monday, marking a significant drop in the stock following the announcement of a $1.7 billion all-stock acquisition of Personalis. The move reflects investor concerns over the financial implications of the deal and uncertainty about the integration of the genomics company into Tempus AI’s operations. Multiple analysts have weighed in on the transaction, with some calling it a strategic move to expand the company’s precision oncology capabilities, while others have expressed skepticism about the valuation and short-term financial impact.

What Happened

Tempus AI announced a definitive merger agreement to acquire Personalis, a biotechnology company specializing in genomics and oncology diagnostics. The deal, valued at $1.7 billion, is intended to strengthen Tempus AI’s position in minimal residual disease (MRD) testing and expand its biopharma data offerings. However, the stock dropped nearly 8% in response, with some analysts suggesting the market is overreacting to the acquisition’s financial burden. Jefferies and Needham have both reiterated their stock ratings, with the former citing concerns over the deal and the latter calling the stock movement a “market misread.” Executives at Tempus AI have emphasized the long-term benefits of the acquisition, particularly in MRD testing, but investors appear to be focused on the immediate financial strain.

What The Data Shows

The stock is currently trading at a market cap of $9.4 billion, with a beta of 3.46, indicating high volatility. Over the past year, it has ranged between $41.73 and $104.32. The company remains unprofitable, with a trailing twelve-month (TTM) earnings per share of -1.72 and a net margin of -22.2%. Revenue, however, has grown by 69.8% TTM. Recent insider transactions show 13 sales totaling $23.3 million in the last 90 days, with no insider buys. Congressional activity includes a recent purchase by Donald J. Trump, but no other disclosed trades. Retail traders on social media have speculated on the deal, with some suggesting a $16.25 per share price for the acquisition.

What To Watch

The stock is currently underpinned by a “Buy” rating from several analysts, including Needham and Jefferies, though the market reaction remains mixed. Investors should monitor the company’s ability to integrate Personalis effectively and demonstrate long-term value from the acquisition.

AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Not financial advice.

TEM by the numbers

Last: $48.41Session: -7.74%Coverage: 21 stories / 13 sourcesAI sentiment: 58/100 (bullish)Mkt cap: $9.4B52w: $41.73 to $104.32
TEM · Jul 21 session (5-min) · +1.57% vs prior close · updated 8:53 PM ET
$47.99$48.95$49.91prev close $48.41$49.177:00 AM10:13 AM1:27 PM4:41 PM7:55 PM7:00 AM · $48.947:05 AM · $48.957:10 AM · $49.147:15 AM · $48.947:20 AM · $48.947:25 AM · $48.907:30 AM · $49.007:35 AM · $49.007:40 AM · $49.007:50 AM · $49.067:55 AM · $49.098:00 AM · $48.958:05 AM · $48.938:10 AM · $48.988:15 AM · $48.908:25 AM · $48.808:30 AM · $48.688:35 AM · $48.708:40 AM · $48.688:45 AM · $48.738:50 AM · $48.758:55 AM · $48.739:00 AM · $48.809:05 AM · $49.109:10 AM · $48.999:15 AM · $48.919:20 AM · $49.059:25 AM · $48.499:30 AM · $48.099:35 AM · $48.609:40 AM · $49.159:45 AM · $49.309:50 AM · $49.389:55 AM · $49.6010:00 AM · $49.7410:05 AM · $49.4810:10 AM · $49.5510:15 AM · $49.6110:20 AM · $49.7210:25 AM · $49.8010:30 AM · $49.8010:35 AM · $49.4310:40 AM · $49.4510:45 AM · $49.3510:50 AM · $49.2310:55 AM · $49.2911:00 AM · $49.2811:05 AM · $49.6211:10 AM · $49.6011:15 AM · $49.6711:20 AM · $49.6211:25 AM · $49.6311:30 AM · $49.5911:35 AM · $49.6311:40 AM · $49.6611:45 AM · $49.3911:50 AM · $49.3011:55 AM · $49.4312:00 PM · $49.5112:05 PM · $49.4012:10 PM · $49.4512:15 PM · $49.3812:20 PM · $49.4912:25 PM · $49.5812:30 PM · $49.3912:35 PM · $49.4012:40 PM · $49.2812:45 PM · $49.2412:50 PM · $49.3812:55 PM · $49.331:00 PM · $49.351:05 PM · $49.311:10 PM · $49.151:15 PM · $49.121:20 PM · $49.221:25 PM · $49.151:30 PM · $49.021:35 PM · $49.061:40 PM · $49.121:45 PM · $49.151:50 PM · $49.181:55 PM · $49.162:00 PM · $49.252:05 PM · $49.242:10 PM · $49.132:15 PM · $48.982:20 PM · $48.972:25 PM · $48.732:30 PM · $48.562:35 PM · $48.652:40 PM · $48.662:45 PM · $48.562:50 PM · $48.392:55 PM · $48.373:00 PM · $48.413:05 PM · $48.273:10 PM · $48.223:15 PM · $48.233:20 PM · $48.193:25 PM · $48.313:30 PM · $48.243:35 PM · $48.303:40 PM · $48.413:45 PM · $48.633:50 PM · $48.763:55 PM · $48.994:00 PM · $49.304:05 PM · $49.014:10 PM · $49.024:15 PM · $49.194:20 PM · $49.014:25 PM · $49.004:30 PM · $49.194:35 PM · $49.144:40 PM · $49.134:45 PM · $49.064:55 PM · $49.065:00 PM · $49.005:05 PM · $49.125:15 PM · $49.145:25 PM · $49.145:30 PM · $49.125:40 PM · $49.005:45 PM · $49.055:55 PM · $49.086:05 PM · $49.076:10 PM · $49.006:15 PM · $49.006:20 PM · $49.006:25 PM · $49.006:30 PM · $49.086:50 PM · $49.106:55 PM · $49.137:00 PM · $49.057:05 PM · $49.137:15 PM · $49.067:20 PM · $49.187:25 PM · $49.097:30 PM · $49.187:35 PM · $49.107:40 PM · $49.157:45 PM · $49.177:55 PM · $49.17
AI sentiment, last 36h · averaged over 21 stories · 58/100 bullish
AI sentiment 58/100 (bullish)0 · bearish50bullish · 100

The headlines behind the move

Story flow · 8 stories on the wire, last 36h · hover or tap a dot for the headline
36h ago24h ago12h agopublishInvestors.com · sentiment 34 · Tempus AI Scoops Up Personalis For $1.5 Billion; But Shares DiveInvestors.com · 34Tempus AI Scoops Up Personalis For $1.5 Billion; But Shares DiveYahoo Finance · sentiment 63 · Tempus AI Bets on MRD Testing Growth With Personalis AcquisitionYahoo Finance · 63Tempus AI Bets on MRD Testing Growth With Personalis AcquisitionInvesting.com Analyst Ratings · sentiment 56 · Needham reiterates Tempus AI stock rating after Personalis dealInvesting.com Analyst Ratings · 56Needham reiterates Tempus AI stock rating after Personalis dealInvesting.com Analyst Ratings · sentiment 61 · Tempus AI stock maintains Buy rating after Personalis acquisitionInvesting.com Analyst Ratings · 61Tempus AI stock maintains Buy rating after Personalis acquisitionStocktwits News · sentiment 56 · TEM, PSNL Stocks Are Falling — Why Morgan Stanley Still Likes Tempus AI’s Personalis DealStocktwits News · 56TEM, PSNL Stocks Are Falling — Why Morgan Stanley Still Likes Tempus AI’s Personalis DealTipRanks · sentiment 42 · Tempus AI (TEM) Drops on $1.7B Personalis Deal; Needham Analyst Calls the Slide a “Market Misread”TipRanks · 42Tempus AI (TEM) Drops on $1.7B Personalis Deal; Needham Analyst Calls the Slide a “Market…Investing.com Analyst Ratings · sentiment 42 · Jefferies reiterates Tempus AI stock rating on acquisition concernsInvesting.com Analyst Ratings · 42Jefferies reiterates Tempus AI stock rating on acquisition concernsTipRanks · sentiment 63 · Tempus AI Announces Merger Agreement to Acquire PersonalisTipRanks · 63Tempus AI Announces Merger Agreement to Acquire Personalis
9d agoTipRanksBULLISH 63M&A

Tempus AI Announces Merger Agreement to Acquire Personalis

Tempus AI, Inc. Class A ( ($TEM) ) just unveiled an announcement. On July 20, 2026, Tempus AI, Inc. signed a definitive merger agreement to acquire genomics company...

9d agoInvesting.com Analyst RatingsBEARISH 42Analyst

Jefferies reiterates Tempus AI stock rating on acquisition concerns

Jefferies reiterates Tempus AI stock rating on acquisition concerns

9d agoTipRanksBEARISH 42M&A

Tempus AI (TEM) Drops on $1.7B Personalis Deal; Needham Analyst Calls the Slide a “Market Misread”

Tempus AI ($TEM) stock fell about 8% on Monday after the health technology company said it will acquire biotechnology company Personalis ($PSNL) in an all-stock dea...

9d agoStocktwits NewsBULLISH 56M&A

TEM, PSNL Stocks Are Falling — Why Morgan Stanley Still Likes Tempus AI’s Personalis Deal

The brokerage said the acquisition strengthens Tempus AI’s precision oncology business, though near-term financials are less compelling.

9d agoInvesting.com Analyst RatingsBULLISH 61M&A

Tempus AI stock maintains Buy rating after Personalis acquisition

Tempus AI stock maintains Buy rating after Personalis acquisition

9d agoInvesting.com Analyst RatingsBULLISH 56Analyst

Needham reiterates Tempus AI stock rating after Personalis deal

Needham reiterates Tempus AI stock rating after Personalis deal

9d agoYahoo FinanceBULLISH 63M&A

Tempus AI Bets on MRD Testing Growth With Personalis Acquisition

Tempus AI (NASDAQ:TEM) executives said the company’s planned acquisition of Personalis is intended to strengthen its position in minimal residual disease, or MRD, testing, while expanding its biopharma data and profiling capabilities. On a call with analysts, Tempus said it agreed to acquire all ou

9d agoInvestors.comBEARISH 34M&A

Tempus AI Scoops Up Personalis For $1.5 Billion; But Shares Dive

Tempus AI pledged to buy cancer diagnostics outfit Personalis for $1.5 billion on Monday. But shares of both medtech companies skidded.

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More on TEM: full news and sentiment history. Sentiment scores are AI-derived research signals, not financial advice.

Earlier TEM move explainers: 2026-07-22 · 2026-07-21 · 2026-07-20