Who owns Tempus AI (TEM)?
88 holders named in SEC filings declare between 76.5% and 86.0% of Tempus AI's shares outstanding, as of Sep 22, 2026. The largest are Eric P. Lefkofsky (20.2%), Bradley A. Keywell (7.1%) and Vanguard (5.9%); the five largest hold 43.4% together. Another 402 institutions hold small positions worth 3.1%. At least 10.9% of the shares appear in no ownership filing: investors who do not have to report, mostly individuals. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 9.4% and sold 7.2% of the shares, a net purchase of 2.3%; 108 opened a position, 155 added, 118 reduced and 56 sold out. Biggest buyers: Goldman Sachs (+2.5M shares) and Citadel (+1.9M shares). Biggest sellers: GC Wealth Management RIA, LLC (-4.2M) and VOLORIDGE INVESTMENT MANAGEMENT, LLC (-863,952). Directors and officers, from their latest Form 4: Eric P. Lefkofsky (20.2%) and Ryan Fukushima (0.32%). Over time, 476 managers declared Tempus AI in their 13F for Q2 2026, against 80 for Q2 2024: together at most 61.3% of the shares outstanding, against 20.6%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| Eric P. Lefkofsky | Form 4 | 20.2% | Sep 22, 2026 | — |
| Bradley A. Keywell | 13G | 7.1% | Jan 17, 2025 | — |
| Vanguard | 13F | 5.9% | Jun 30, 2026 | Q2 2024 |
| ARK Investment Management LLC | 13F | 5.6% | Jun 30, 2026 | Q2 2024 |
| BlackRock | 13F | 4.6% | Jun 30, 2026 | Q4 2024 |
| BAILLIE GIFFORD & CO | 13F | 4.5% | Jun 30, 2026 | Q2 2025 |
| SOFTBANK GROUP CORP. | 13F | 3.0% | Jun 30, 2026 | Q2 2024 |
| JPMorgan | 13F | 2.8% | Jun 30, 2026 | Q2 2024 |
| Amova Asset Management Americas, Inc. | 13F | 2.3% | Jun 30, 2026 | Q2 2024 |
| Sumitomo Mitsui Trust Group, Inc. | 13F | 2.3% | Jun 30, 2026 | Q2 2024 |
| Goldman Sachs | 13F | 2.1% | Jun 30, 2026 | Q3 2024 |
| Morgan Stanley | 13F | 2.0% | Jun 30, 2026 | Q2 2024 |
| UBS | 13F | 1.9% | Jun 30, 2026 | Q3 2024 |
| Franklin Templeton | 13F | 1.9% | Jun 30, 2026 | Q2 2024 |
| Citadel | 13F | 1.4% | Jun 30, 2026 | Q4 2024 |
| GC Wealth Management RIA, LLC | 13F | 1.3% | Jun 30, 2026 | Q4 2025 |
| Geode Capital | 13F | 1.2% | Jun 30, 2026 | Q2 2024 |
| Bank of America | 13F | 1.1% | Jun 30, 2026 | Q2 2024 |
| State Street | 13F | 1.0% | Jun 30, 2026 | Q2 2025 |
| Alphabet Inc. | 13F | 0.86% | Jun 30, 2026 | Q2 2024 |
| Jane Street | 13F | 0.79% | Jun 30, 2026 | Q2 2024 |
| Lingotto Investment Management LLP | 13F | 0.78% | Jun 30, 2026 | Q2 2024 |
| Clear Street Group Inc. | 13F | 0.75% | Jun 30, 2026 | Q3 2025 |
| Legal & General | 13F | 0.64% | Jun 30, 2026 | Q2 2024 |
| Norges Bank | 13F | 0.54% | Jun 30, 2026 | Q2 2024 |
Tempus AI institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2024 | 152 | 28.7% | $1.7B | 89.7% |
| Q4 2025 | 448 | 55.9% | $6.0B | 65.3% |
| Q2 2026 | 476 | 61.3% | $6.4B | 60.8% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.