TEM
Tempus AI, Inc.
77.80$
-3.1%
vs. previous close
Closing price · As of: Sep 18, 2026
Ownership
Ownership Structure
Who owns Tempus AI, Inc. (TEM)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 66.1% of the shares are freely tradable; institutional investors hold 57.0%.
Institutional ownership
?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
57.0%
Insiders
?Share of the stock held by the executives, founders and major shareholders of the company itself.
37.1%
Float
?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
66.1%
Short % of float
?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
29.2%
Shares Outstanding
?Total number of shares issued. Price times share count gives market cap.
175Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| ARK Investment Management LLC | 5.29 | 9,607,745 | +27.1 | 03/31/2026 |
| BlackRock Inc | 4.94 | 8,968,330 | +19.3 | 03/31/2026 |
| Baillie Gifford & Co Limited. | 4.51 | 8,190,133 | -5.3 | 06/30/2026 |
| SoftBank Group Corp | 2.98 | 5,405,406 | +0.0 | 06/30/2026 |
| JPMorgan Chase & Co | 2.72 | 4,933,193 | +0.5 | 03/31/2026 |
| Vanguard Capital Management, LLC | 2.71 | 4,918,122 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 2.58 | 4,679,057 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| ARK Disruptive Innovation Full Composite | 3.47 | 6,292,866 | -2.6 | 06/30/2026 |
| ARK Innovation ETF | 3.12 | 5,666,879 | -0.9 | 08/31/2026 |
| Scottish Mortgage Ord | 2.31 | 4,192,158 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Lefkofsky Eric P | CEO and Chairman | 26,846,013 | 2,088,619,811 $ | Aug 18, 2026 | both |
| Fukushima Ryan | CEO, Data | 579,037 | 45,049,079 $ | Aug 18, 2026 | both |
| Polovin Andrew | EVP, Chief Legal Officer | 138,140 | 10,747,292 $ | Aug 19, 2026 | direct |
| Rogers James William | Chief Financial Officer | 106,024 | 8,248,667 $ | Aug 19, 2026 | direct |
| Schoenherr Thomas Edward | CEO, Diagnostics | 87,021 | 6,770,234 $ | Aug 21, 2026 | direct |
| Bartolucci Ryan M | Chief Accounting Officer | 67,866 | 5,279,975 $ | Aug 18, 2026 | direct |
| West Nadja | Director | 31,981 | 2,488,122 $ | Aug 28, 2026 | direct |
| Epstein David R | Director | 30,844 | 2,399,663 $ | Sep 1, 2026 | direct |
| Doudna Jennifer A | Director | 25,266 | 1,965,695 $ | Sep 1, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 1, 2026 | Fukushima Ryan | CEO, Data | Sell | 1,000 | 64.63 | 64,630 |
| Sep 1, 2026 | Fukushima Ryan | CEO, Data | Sell | 5,900 | 63.80 | 376,420 |
| Sep 1, 2026 | Fukushima Ryan | CEO, Data | Sell | 10,900 | 62.64 | 682,776 |
| Sep 1, 2026 | Fukushima Ryan | CEO, Data | Sell | 13,046 | 62.12 | 810,418 |
| Sep 1, 2026 | Doudna Jennifer A | Director | Sell | 676 | 65.55 | 44,312 |
| Sep 1, 2026 | Epstein David R | Director | Sell | 250 | 65.55 | 16,388 |
| Aug 28, 2026 | West Nadja | Director | Sell | 3,000 | 69.00 | 207,000 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 681 | 70.58 | 48,065 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 11,167 | 69.83 | 779,792 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 19,605 | 68.97 | 1,352,157 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 8,926 | 68.13 | 608,128 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 3,649 | 67.01 | 244,519 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 3,429 | 65.98 | 226,245 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 1,883 | 64.70 | 121,830 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 660 | 64.03 | 42,260 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 102 | 70.58 | 7,199 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 1,668 | 69.83 | 116,476 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 2,887 | 68.96 | 199,088 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 1,365 | 68.13 | 92,997 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 578 | 67.01 | 38,732 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 515 | 65.98 | 33,980 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 284 | 64.70 | 18,375 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 101 | 64.03 | 6,467 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 1,837 | 70.58 | 129,655 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 30,139 | 69.83 | 2,104,606 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 52,784 | 68.97 | 3,640,512 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 24,161 | 68.13 | 1,646,089 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 9,935 | 67.01 | 665,744 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 9,262 | 65.98 | 611,107 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 5,093 | 64.70 | 329,517 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 1,789 | 64.03 | 114,550 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 782 | 70.58 | 55,194 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 12,851 | 69.83 | 897,385 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 22,495 | 68.97 | 1,551,480 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 10,282 | 68.13 | 700,513 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 4,218 | 67.01 | 282,648 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 3,944 | 65.98 | 260,225 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 2,168 | 64.70 | 140,270 |
| Aug 25, 2026 | Lefkofsky Eric P | CEO and Chairman | Sell | 760 | 64.03 | 48,663 |
| Aug 21, 2026 | Schoenherr Thomas Edward | CEO, Diagnostics | Sell | 2,694 | 70.00 | 188,580 |
| Aug 21, 2026 | Fukushima Ryan | CEO, Data | Sell | 14,286 | 70.00 | 1,000,020 |
| Aug 19, 2026 | Schoenherr Thomas Edward | CEO, Diagnostics | Sell | 494 | 61.23 | 30,248 |
| Aug 19, 2026 | Schoenherr Thomas Edward | CEO, Diagnostics | Sell | 900 | 60.45 | 54,405 |
| Aug 19, 2026 | Schoenherr Thomas Edward | CEO, Diagnostics | Sell | 2,994 | 59.97 | 179,550 |
| Aug 19, 2026 | Schoenherr Thomas Edward | CEO, Diagnostics | Sell | 500 | 57.94 | 28,970 |
| Aug 19, 2026 | Schoenherr Thomas Edward | CEO, Diagnostics | Sell | 100 | 56.47 | 5,647 |
| Aug 19, 2026 | Schoenherr Thomas Edward | CEO, Diagnostics | Sell | 3,094 | 55.97 | 173,171 |
| Aug 19, 2026 | Rogers James William | Chief Financial Officer | Sell | 26,313 | 60.00 | 1,578,780 |
| Aug 19, 2026 | Polovin Andrew | EVP, Chief Legal Officer | Sell | 7,927 | 56.00 | 443,912 |
| Aug 18, 2026 | Schoenherr Thomas Edward | CEO, Diagnostics | Sell | 9,232 | 49.61 | 458,000 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.