ONTO Insider Trading

ONTO · full profile →Last filing May 20, 2026
Mixed · 180d
Open-Market Buys (180d)
$0
0 insiders
Open-Market Sells (180d)
$0
0 insiders
Net Insider Flow
$0
open market, 180d
Reporting Insiders
0
0 P/S transactions
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Build on these Form 4 transactions

The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.

Recent Form 4 Transactions

100 shown
DateInsiderRoleActionSharesPriceValue
May 20, 2026Schwartz Stephen SDirectorGrant(A)761$0
May 20, 2026Miller David BrianDirectorGrant(A)761$0
May 20, 2026Kelley Stephen DouglasDirectorGrant(A)761$0
May 20, 2026Lynch Susan DDirectorGrant(A)761$0
May 20, 2026Su MayDirectorGrant(A)761$0
May 20, 2026Seams Christopher ADirectorGrant(A)761$0
May 15, 2026OH Yoon AhSVP, Gen Counsel & Corp SecTax withholding(F)530$271.77$144K
May 15, 2026Yaldaei RamilChief Operating OfficerTax withholding(F)625$271.77$170K
May 15, 2026Yaldaei RamilChief Operating OfficerTax withholding(F)218$271.77$59K
Mar 3, 2026Plisinski Michael PChief Executive Officer, DirectorTax withholding(F)4K$207.50$776K
Mar 3, 2026OH Yoon AhSVP, Gen Counsel & Corp SecTax withholding(F)417$207.50$87K
Mar 3, 2026Yaldaei RamilChief Operating OfficerTax withholding(F)615$207.50$128K
Mar 3, 2026Dolev IdoEVP, Prod Solutions GrpTax withholding(F)819$207.50$170K
Mar 2, 2026Roberts Brian KChief Financial OfficerGrant(A)3K$0
Mar 2, 2026Roberts Brian KChief Financial OfficerGrant(A)2K$0
Mar 2, 2026Roberts Brian KChief Financial OfficerGrant(A)2K$0
Mar 2, 2026Plisinski Michael PChief Executive Officer, DirectorGrant(A)14K$0
Mar 2, 2026Plisinski Michael PChief Executive Officer, DirectorGrant(A)7K$0
Mar 2, 2026Plisinski Michael PChief Executive Officer, DirectorGrant(A)7K$0
Mar 2, 2026OH Yoon AhSVP, Gen Counsel & Corp SecGrant(A)2K$0
Mar 2, 2026OH Yoon AhSVP, Gen Counsel & Corp SecGrant(A)1K$0
Mar 2, 2026OH Yoon AhSVP, Gen Counsel & Corp SecGrant(A)1K$0
Mar 2, 2026Yaldaei RamilChief Operating OfficerGrant(A)8K$0
Mar 2, 2026Yaldaei RamilChief Operating OfficerGrant(A)2K$0
Mar 2, 2026Yaldaei RamilChief Operating OfficerGrant(A)2K$0
Mar 2, 2026Dolev IdoEVP, Prod Solutions GrpGrant(A)3K$0
Mar 2, 2026Dolev IdoEVP, Prod Solutions GrpGrant(A)2K$0
Mar 2, 2026Dolev IdoEVP, Prod Solutions GrpGrant(A)2K$0
Mar 2, 2026Chen ShirleySVP Customer SuccessGrant(A)3K$0
Mar 2, 2026Chen ShirleySVP Customer SuccessGrant(A)1K$0
Mar 2, 2026Chen ShirleySVP Customer SuccessGrant(A)1K$0
Mar 1, 2026Plisinski Michael PChief Executive Officer, DirectorTax withholding(F)2K$215.89$480K
Mar 1, 2026Plisinski Michael PChief Executive Officer, DirectorOption exercise(M)5K$0
Mar 1, 2026Plisinski Michael PChief Executive Officer, DirectorTax withholding(F)2K$215.89$416K
Mar 1, 2026Plisinski Michael PChief Executive Officer, DirectorOption exercise(M)6K$0
Mar 1, 2026OH Yoon AhSVP, Gen Counsel & Corp SecOption exercise(M)724$0
Mar 1, 2026OH Yoon AhSVP, Gen Counsel & Corp SecTax withholding(F)307$215.89$66K
Mar 1, 2026OH Yoon AhSVP, Gen Counsel & Corp SecTax withholding(F)267$215.89$58K
Mar 1, 2026OH Yoon AhSVP, Gen Counsel & Corp SecOption exercise(M)941$0
Mar 1, 2026Yaldaei RamilChief Operating OfficerTax withholding(F)347$215.89$75K
Mar 1, 2026Yaldaei RamilChief Operating OfficerTax withholding(F)276$215.89$60K
Mar 1, 2026Yaldaei RamilChief Operating OfficerOption exercise(M)649$0
Mar 1, 2026Yaldaei RamilChief Operating OfficerOption exercise(M)844$0
Feb 14, 2026Plisinski Michael PChief Executive Officer, DirectorTax withholding(F)9K$217.23$1.9M
Feb 14, 2026Plisinski Michael PChief Executive Officer, DirectorTax withholding(F)4K$217.23$789K
Feb 14, 2026Plisinski Michael PChief Executive Officer, DirectorOption exercise(M)18K$0
Feb 14, 2026Plisinski Michael PChief Executive Officer, DirectorOption exercise(M)12K$0
Feb 14, 2026OH Yoon AhSVP, Gen Counsel & Corp SecTax withholding(F)1K$217.23$238K
Feb 14, 2026OH Yoon AhSVP, Gen Counsel & Corp SecOption exercise(M)3K$0
Feb 14, 2026OH Yoon AhSVP, Gen Counsel & Corp SecTax withholding(F)501$217.23$109K
Feb 14, 2026OH Yoon AhSVP, Gen Counsel & Corp SecOption exercise(M)2K$0
Dec 24, 2025Plisinski Michael PChief Executive Officer, DirectorGift(G)25K$0
Dec 2, 2025Dolev IdoEVP, Prod Solutions GrpTax withholding(F)3K$154.01$490K
Oct 3, 2025Yaldaei RamilChief Operating OfficerTax withholding(F)594$143.71$85K
Sep 2, 2025Chen ShirleySVP, Customer SuccessGrant(A)13K$0
Sep 2, 2025Roberts Brian KChief Financial OfficerGrant(A)21K$0
Jun 2, 2025Dolev IdoEVP, Prod Solutions GrpGrant(A)22K$0
Jun 2, 2025Dolev IdoEVP, Prod Solutions GrpGrant(A)5K$0
Jun 2, 2025Dolev IdoEVP, Prod Solutions GrpGrant(A)3K$0
Jun 2, 2025Dolev IdoEVP, Prod Solutions GrpGrant(A)3K$0
May 21, 2025Kelley Stephen DouglasDirectorGrant(A)2K$0
May 21, 2025Lynch Susan DDirectorGrant(A)2K$0
May 21, 2025Miller David BrianDirectorGrant(A)2K$0
May 21, 2025Schwartz Stephen SDirectorGrant(A)2K$0
May 21, 2025Seams Christopher ADirectorGrant(A)2K$0
May 21, 2025Su MayDirectorGrant(A)2K$0
May 17, 2025Slicer MarkChief Financial OfficerTax withholding(F)2K$99.40$205K
May 15, 2025OH Yoon AhSVP, Gen Counsel & Corp SecTax withholding(F)603$98.04$59K
May 15, 2025Yaldaei RamilChief Operating OfficerTax withholding(F)609$98.04$60K
May 15, 2025Yaldaei RamilChief Operating OfficerTax withholding(F)217$98.04$21K
Mar 3, 2025OH Yoon AhSVP, Gen Counsel & Corp SecGrant(A)3K$0
Mar 3, 2025OH Yoon AhSVP, Gen Counsel & Corp SecGrant(A)1K$0
Mar 3, 2025OH Yoon AhSVP, Gen Counsel & Corp SecGrant(A)1K$0
Mar 3, 2025Plisinski Michael PCEO, DirectorGrant(A)23K$0
Mar 3, 2025Plisinski Michael PCEO, DirectorGrant(A)12K$0
Mar 3, 2025Plisinski Michael PCEO, DirectorGrant(A)12K$0
Mar 3, 2025Slicer MarkChief Financial OfficerGrant(A)3K$0
Mar 3, 2025Slicer MarkChief Financial OfficerGrant(A)1K$0
Mar 3, 2025Slicer MarkChief Financial OfficerGrant(A)1K$0
Mar 3, 2025Vedula SrinivasSVP, Customer SuccessGrant(A)3K$0
Mar 3, 2025Vedula SrinivasSVP, Customer SuccessGrant(A)1K$0
Mar 3, 2025Vedula SrinivasSVP, Customer SuccessGrant(A)1K$0
Mar 3, 2025Yaldaei RamilChief Operating OfficerGrant(A)4K$0
Mar 3, 2025Yaldaei RamilChief Operating OfficerGrant(A)2K$0
Mar 3, 2025Yaldaei RamilChief Operating OfficerGrant(A)2K$0
Mar 1, 2025OH Yoon AhSVP, Gen Counsel & Corp SecTax withholding(F)304$145.66$44K
Mar 1, 2025Plisinski Michael PCEO, DirectorTax withholding(F)2K$145.66$280K
Mar 1, 2025Slicer MarkChief Financial OfficerTax withholding(F)336$145.66$49K
Mar 1, 2025Vedula SrinivasSVP, Customer SuccessTax withholding(F)199$145.66$29K
Mar 1, 2025Yaldaei RamilChief Operating OfficerTax withholding(F)305$145.66$44K
Feb 14, 2025Vedula SrinivasSVP, Customer SuccessTax withholding(F)1K$176.55$246K
Feb 14, 2025Vedula SrinivasSVP, Customer SuccessTax withholding(F)464$176.55$82K
Feb 14, 2025Vedula SrinivasSVP, Customer SuccessOption exercise(M)3K$0
Feb 14, 2025Vedula SrinivasSVP, Customer SuccessOption exercise(M)1K$0
Feb 14, 2025Slicer MarkChief Financial OfficerTax withholding(F)2K$176.55$314K
Feb 14, 2025Slicer MarkChief Financial OfficerOption exercise(M)5K$0
Feb 14, 2025Slicer MarkChief Financial OfficerTax withholding(F)620$176.55$109K
Feb 14, 2025Slicer MarkChief Financial OfficerOption exercise(M)2K$0
Feb 14, 2025Plisinski Michael PCEO, DirectorOption exercise(M)24K$0
Feb 14, 2025Plisinski Michael PCEO, DirectorTax withholding(F)4K$176.55$673K

Data Source

Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.

Coverage: Form 4 filings indexed 2021-03-292026-07-14. Earlier history is backfilling; this window widens as it deepens.

Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).