Personalis PSNL Insider Ownership

Updated Oct 10, 2026

Across the past 12 months, open-market trades by Personalis insiders were all sales, totaling $8.78 million (685.97K shares).

• By number of insiders, Personalis saw 4 insiders sell on the open market over the past 12 months and none buy.
• Christopher M. Hall (Chief Executive Officer) was PSNL's largest open-market seller in the past 12 months, with $4.31 million of sales (337.07K shares); the latest was on September 18, 2026.
• Outside the open market, Personalis insiders received 203.12K shares in stock awards and acquired 639.9K shares through option exercises and conversions over the past 12 months.
• According to Business Quant data, insiders at Personalis reported 13.55Mn shares in total in their latest Form 4 filings, down 0.12% from 13.56Mn shares at the end of Q2 2026 and up 1.43% from 13.36Mn shares at the end of Q3 2025.
• All of the 13.55Mn shares held by Personalis insiders are held directly, none through trusts, partnerships or other entities.
• Per Business Quant, 11 insiders of PSNL hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Personalis' three largest insider shareholders, based on their latest Form 4 filings, are Tempus Ai, Inc. (10% owner, 12.72Mn shares), Christopher M. Hall (Chief Executive Officer, 228.53K shares) and Aaron Tachibana (CFO and COO, 195.9K shares).
• Tempus Ai, Inc. holds 93.89% of the combined insider position in Personalis.
• Institutions owned 79.88% of PSNL shares as of Q2 2026; insiders' latest Form 4 filings account for about 12.74%, leaving roughly 7.38% with other investors, including the public.
• A total of 30 Form 4 filings with transactions in Personalis stock were made over the past 12 months, by 10 insiders.
• This summary of Personalis insider activity covers Form 4 filings through September 22, 2026.