Eric P. Lefkofsky
Eric P. Lefkofsky: CEO and Chairman · Director · 10% owner at Tempus AI. What Eric P. Lefkofsky holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Tempus AI (TEM)
Eric P. Lefkofsky holds 36.4M Tempus AI shares (20.2% of the company), worth about $3.0B at the last price, according to the Form 4 of Sep 22, 2026.
- Shares held: 23.4M (13.0%), $1.9B — Held through companies or funds (By Gray Media, LLC, By Blue Media, LLC, By 346 Long LLC, By Black Media, LLC): 23.4M Class A.
- Shares held: 10.0M (5.5%), $829.7M — Held through trusts (By Lefkofsky Family 2025 GRAT, By Lefkofsky Family 2026 GRAT): 10.0M Class A.
- Shares held: 2.1M (1.2%), $174.1M — Held in their own name: 2.1M Class A.
- Shares held: 902,131 (0.50%), $74.8M — Held by a foundation (By Lefkofsky Family Foundation, By Vas.org Foundation): 902,131 Class A.
Declarations
- Tempus AI (TEM) — Form 4 of Sep 22, 2026 (CEO and Chairman): open-market sale of 7,394 at $76.57; open-market sale of 33,770 at $77.29; 36.4M shares after 0001114357-26-000040
- Tempus AI (TEM) — Form 4 of Sep 17, 2026 (CEO and Chairman): open-market sale of 52,558 at $80.52; open-market sale of 4,942 at $81.09; 36.6M shares after 0001114357-26-000038
- Tempus AI (TEM) — Form 4 of Aug 25, 2026 (CEO and Chairman): open-market sale of 11,167 at $69.83; open-market sale of 681 at $70.58; 12.2M shares after 0001114357-26-000036
- Tempus AI (TEM) — Form 4 of Aug 25, 2026 (CEO and Chairman): open-market sale of 760 at $64.03; open-market sale of 2,168 at $64.70; 24.8M shares after 0001114357-26-000034
- Tempus AI (TEM) — Form 4 of Aug 18, 2026 (CEO and Chairman): open-market sale of 132,591 at $49.61; 37.1M shares after 0001114357-26-000032
- Tempus AI (TEM) — Form 4 of Jul 28, 2026 (CEO and Chairman): open-market sale of 20,472 at $41.34; open-market sale of 30,906 at $42.36; 37.2M shares after 0001114357-26-000027
- Tempus AI (TEM) — Form 4 of Jun 29, 2026 (CEO and Chairman): open-market sale of 2,317 at $55.38; open-market sale of 9,430 at $56.51; 37.5M shares after 0001114357-26-000022
- Tempus AI (TEM) — Form 4 of May 27, 2026 (CEO and Chairman): open-market sale of 8,932 at $46.17; open-market sale of 24,318 at $46.89; 37.6M shares after 0001114357-26-000020
- Tempus AI (TEM) — Form 4 of May 19, 2026 (CEO and Chairman): open-market sale of 22,335 at $44.07; 37.8M shares after 0001114357-26-000018
- Tempus AI (TEM) — Form 4 of Apr 28, 2026 (CEO and Chairman): open-market sale of 26,360 at $51.03; open-market sale of 6,890 at $51.52; 37.8M shares after 0001114357-26-000013
- Tempus AI (TEM) — Form 4 of Mar 26, 2026 (CEO and Chairman): open-market sale of 16,388 at $45.78; open-market sale of 14,915 at $46.91; 38.0M shares after 0001114357-26-000011
- Tempus AI (TEM) — Form 4 of Feb 20, 2026 (CEO and Chairman): open-market sale of 8,552 at $58.31; open-market sale of 23,775 at $59.04; 38.2M shares after 0001114357-26-000009
- Tempus AI (TEM) — Form 4 of Jan 28, 2026 (CEO and Chairman): open-market sale of 25,631 at $65.41; open-market sale of 7,619 at $66.06; 38.1M shares after 0001114357-26-000002
- Tempus AI (TEM) — 13G filed Feb 10, 2026: 42.8M shares counted as of Dec 31, 2025, 24.0% as declared
- Tempus AI (TEM) — Form 4 of Dec 18, 2025 (CEO and Chairman): open-market sale of 3,571 at $62.26; open-market sale of 5,118 at $63.08; 38.2M shares after 0001114357-25-000016
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.