Personalis, Inc. (PSNL) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, the three largest insider holders of PSNL are Ai, Inc. Tempus (TenPercentOwner, 12.72Mn shares), Venture Partners Select Iv, L.P. Lightspeed (Other, 2.09Mn shares), John Stephen West (President And Ceo, 622.44K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Ai, Inc. Tempus 12,718,800 0 20 Aug, 2024
John Stephen West President And Ceo 622,444 0 14 Dec, 2022
Christopher M Hall Chief Executive Officer 235,986 0 17 Mar, 2026
Aaron Tachibana Cfo And Coo 198,833 0 17 Mar, 2026
Richard Chen President And Cmo 173,880 0 17 Mar, 2026
Stephen Michael Moore Svp And Chief Legal Officer 92,325 0 17 Mar, 2026
Lonnie Shoff 30,940 0 04 Aug, 2022

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
15 Mar, 2026 Aaron Tachibana Common Stock A 34,375 $0.00 198,833 D A
15 Mar, 2026 Stephen Michael Moore Common Stock A 28,125 $0.00 92,325 D A
15 Mar, 2026 Christopher M Hall Common Stock A 87,500 $0.00 235,986 D A
15 Mar, 2026 Richard Chen Common Stock A 46,875 $0.00 173,880 D A
15 Mar, 2026 Aaron Tachibana Stock Option (right to buy) A 206,250 $0.00 206,250 D A
15 Mar, 2026 Stephen Michael Moore Stock Option (right to buy) A 168,750 $0.00 168,750 D A
15 Mar, 2026 Christopher M Hall Stock Option (right to buy) A 525,000 $0.00 525,000 D A
15 Mar, 2026 Richard Chen Stock Option (right to buy) A 281,250 $0.00 281,250 D A
23 Feb, 2026 Richard Chen Stock Option (right to buy) A 15,000 $0.00 15,000 D A
23 Feb, 2026 Aaron Tachibana Stock Option (right to buy) A 15,000 $0.00 15,000 D A
23 Feb, 2026 Christopher M Hall Stock Option (right to buy) A 33,333 $0.00 33,333 D A
23 Feb, 2026 Stephen Michael Moore Stock Option (right to buy) A 8,333 $0.00 8,333 D A
22 Jan, 2026 Aaron Tachibana Common Stock A 1,201 $9.16 165,659 D M
22 Jan, 2026 Aaron Tachibana Common Stock D 1,201 $11.50 164,458 D S
22 Jan, 2026 Aaron Tachibana Stock Option (right to buy) D 1,201 $0.00 107,631 D M
25 Nov, 2025 Aaron Tachibana Common Stock A 103,668 $9.16 268,126 D M
25 Nov, 2025 Aaron Tachibana Common Stock D 103,668 $10.78 164,458 D S
25 Nov, 2025 Aaron Tachibana Stock Option (right to buy) D 103,668 $0.00 108,832 D M
03 Nov, 2025 Christopher M Hall Common Stock D 29,612 $8.99 148,486 D S
28 Jul, 2025 Aaron Tachibana Common Stock D 641 $6.57 164,458 D S