Onto Innovation Inc. (ONTO) Insider Ownership

Historic Insider Ownership Trends

Onto Innovation's top three insider shareholders as of June 06, 2026 are Michael P Plisinski (Chief Executive Officer, 179.24K shares), Christopher A Seams (Director, 37.75K shares), Rollin Kocher (Svp, Sales And Marketing, 33.90K 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
Steven R Roth Sr Vp Cfo 23,043 0 13 Feb, 2022
D Mayson Brooks Vice President Gm, Ibu 3,025 0 04 Sep, 2024
Leo Berlinghieri - 20,210 0 23 May, 2024
Christopher A Seams - 37,752 0 23 May, 2025
David Brian Miller - 11,931 0 23 May, 2025
Michael P Plisinski Chief Executive Officer 179,242 0 04 Mar, 2026
Bruce C Rhine - 3,500 0 17 Feb, 2022
Stephen Douglas Kelley - 5,623 0 23 May, 2025
Rollin Kocher Svp, Sales And Marketing 33,896 0 08 Sep, 2021
Ju Jin Svp Gm, Ibu 10,254 0 16 Jun, 2023
Susan D Lynch - 2,923 0 23 May, 2025
Srinivas Vedula Svp, Customer Success 18,730 0 05 Mar, 2025
Robert Fiordalice Svp Gm, Metrology Bu 8,763 0 05 Mar, 2024
James Harlow Chief Operating Officer 8,586 0 15 Feb, 2023
Yoon Ah Oh Svp, Gen Counsel Corp Sec 21,640 0 04 Mar, 2026
May Su - 7,223 0 23 May, 2025
Mark Slicer Chief Financial Officer 13,640 0 19 May, 2025
Ramil Yaldaei Chief Operating Officer 18,436 0 04 Mar, 2026
Ido Dolev Evp, Prod Solutions Grp 26,536 0 04 Mar, 2026
Shirley Chen Svp Customer Success 15,517 0 04 Mar, 2026

* 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
02 Mar, 2026 Shirley Chen Common Stock A 2,523 $0.00 15,517 D A
02 Mar, 2026 Ido Dolev Common Stock A 3,440 $0.00 27,355 D A
02 Mar, 2026 Ramil Yaldaei Common Stock A 7,683 $0.00 19,051 D A
02 Mar, 2026 Ramil Yaldaei Common Stock A 7,683 $0.00 19,051 D A
02 Mar, 2026 Michael P Plisinski Common Stock A 14,479 $0.00 182,984 D A
02 Mar, 2026 Yoon Ah Oh Common Stock A 2,408 $0.00 22,057 D A
03 Mar, 2026 Ramil Yaldaei Common Stock D 615 $207.50 18,436 D F
03 Mar, 2026 Yoon Ah Oh Common Stock D 417 $207.50 21,640 D F
03 Mar, 2026 Michael P Plisinski Common Stock D 3,742 $207.50 179,242 D F
03 Mar, 2026 Ido Dolev Common Stock D 819 $207.50 26,536 D F
03 Mar, 2026 Ramil Yaldaei Common Stock D 615 $207.50 18,436 D F
02 Mar, 2026 Shirley Chen Performance Stock Unit A 1,261 $0.00 1,261 D A
02 Mar, 2026 Ido Dolev Performance Stock Unit A 1,720 $0.00 1,720 D A
02 Mar, 2026 Shirley Chen Performance Stock Unit A 1,261 $0.00 1,261 D A
02 Mar, 2026 Ramil Yaldaei Performance Stock Unit A 1,548 $0.00 1,548 D A
02 Mar, 2026 Michael P Plisinski Performance Stock Unit A 7,239 $0.00 7,239 D A
02 Mar, 2026 Yoon Ah Oh Performance Stock Unit A 1,204 $0.00 1,204 D A
02 Mar, 2026 Ramil Yaldaei Performance Stock Unit A 1,548 $0.00 1,548 D A
02 Mar, 2026 Yoon Ah Oh Performance Stock Unit A 1,204 $0.00 1,204 D A
02 Mar, 2026 Ramil Yaldaei Performance Stock Unit A 1,548 $0.00 1,548 D A