Every Form 4 that Onto Innovation Inc. (ONTO) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow ONTO and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full ONTO filings page.
ONTO INNOVATION INC. reported that its Chief Financial Officer, Brian K. Roberts, had 3,239 shares of common stock withheld on September 2, 2026 to satisfy tax withholding obligations arising from vesting of previously granted restricted stock units or performance stock units. After this tax-withholding disposition, he directly holds 21,032 shares of ONTO common stock.
ONTO INNOVATION INC. (ONTO) reported that Senior Vice President of Customer Operations Shirley Chen had 1,516 shares of common stock disposed of on September 2, 2026, as shares were withheld by the company to cover tax withholding obligations arising from the vesting of previously granted restricted stock units or performance stock units. After this tax-withholding transaction, she directly holds 14,001 shares of ONTO common stock.
ONTO INNOVATION INC. (ONTO) reported that Chief Financial Officer Brian K. Roberts had 3,239 shares of common stock withheld on September 2, 2026 to satisfy tax withholding obligations arising from the vesting of previously granted restricted stock units or performance stock units. These shares were not sold in the open market; rather, they were retained by the company for tax payment, leaving Roberts with 21,032 common shares held directly afterward. No Rule 10b5-1 trading plan is reported for this transaction.
ONTO INNOVATION INC. (ONTO) director Susan D. Lynch reported selling 1,000 shares of common stock on 2026-08-21 at a price of $302.30 per share in an open-market or private transaction. After this sale, she directly held 2,684 shares of ONTO common stock. The sale was executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2026, indicating the transaction followed a pre-arranged trading schedule.
ONTO Innovation director Su May reported receiving a grant of 761 shares of Common Stock in the form of restricted stock units. These RSUs vest 100% one year from the grant date and each unit converts into one share when settled. After this award, May holds 7,984 shares directly. The reporting person elected to defer settlement of these RSUs under the Onto Innovation Nonqualified Deferred Compensation Plan, so once vested the shares will be issued according to that deferral election.
SEAMS CHRISTOPHER A reported acquisition or exercise transactions in this Form 4 filing.
ONTO Innovation Inc. director Christopher A. Seams received an equity grant of 761 shares of common stock as restricted stock units. The award was at no cash cost per share and increases his directly held stake to 38,513 shares. All 761 RSUs vest in full one year from the grant date, meaning he will receive the underlying shares only if he remains eligible through that time.
SCHWARTZ STEPHEN S reported acquisition or exercise transactions in this Form 4 filing.
ONTO Innovation Inc. director Stephen S. Schwartz reported an award of 761 shares of common stock in the form of restricted stock units. These RSUs were granted at no cash cost and increase his direct holdings to 3,536 shares after the award.
The footnote explains that each RSU represents a right to receive one share of common stock, with 100% of the shares scheduled to vest one year from the grant date. Schwartz has elected to defer settlement of these RSUs under the Onto Innovation Nonqualified Deferred Compensation Plan, so the actual shares will be issued later in line with his deferral election.
MILLER DAVID BRIAN reported acquisition or exercise transactions in this Form 4 filing.
Onto Innovation Inc. director David Brian Miller received a grant of 761 restricted stock units, each representing one share of common stock at no purchase price. All RSUs vest one year from the grant date. After this award, he directly holds 12,692 shares of Onto Innovation common stock.
Lynch Susan D reported acquisition or exercise transactions in this Form 4 filing.
ONTO Innovation Inc. director Susan D. Lynch received a grant of 761 restricted stock units (RSUs), each representing one share of common stock at no purchase price. All RSUs vest one year from the grant date, and Lynch has elected to defer settlement under the company’s nonqualified deferred compensation plan, with shares to be issued according to her deferral election. Following this award, she holds 3,684 shares of common stock directly.
ONTO Innovation Inc. director Stephen Douglas Kelley reported an acquisition of company stock through an equity award. He received 761 shares of Common Stock at no cash cost, in the form of restricted stock units (RSUs). These RSUs each represent a contingent right to receive one share of ONTO common stock.
All 761 shares subject to the RSU grant vest in a single tranche one year from the grant date, so the award will fully vest after that one-year period. Following this grant, Kelley directly holds 6,384 shares of ONTO common stock, reflecting his updated ownership position reported in this filing.
ONTO Innovation Inc. Chief Operating Officer Ramil Yaldaei reported routine share withholding to cover taxes on equity compensation. On the same date, a total of 843 shares of common stock were disposed of at a value of $271.77 per share through tax-withholding transactions tied to vesting of restricted and performance stock units, rather than open-market sales. Following these withholdings, Yaldaei directly holds 17,593 shares of ONTO common stock.
ONTO INNOVATION INC. reported a Form 4 for officer Yoon Ah Oh, SVP, General Counsel and Corporate Secretary. On this date, 530 shares of common stock were withheld by the company at $271.77 per share to cover tax obligations from vesting of restricted or performance stock units. After this non-market tax-withholding transaction, the officer directly holds 21,110 common shares.
ROBERTS BRIAN K reported acquisition or exercise transactions in this Form 4 filing.
Onto Innovation Inc. Chief Financial Officer Brian K. Roberts reported equity award grants on March 2, 2026. He received 3,096 shares of common stock and new awards of performance stock units, all at a stated price of $0.00 per share as compensation.
The common stock grant and RSUs vest in three equal annual installments over three years from the award date. The performance stock units represent a target number of shares, with actual vesting ranging from 0% to 200% based on performance criteria over the award period.
Onto Innovation Inc. executive vice president Ido Dolev reported routine equity compensation and related tax withholding. On March 2, he received a grant of 3,440 shares of common stock and two performance stock unit awards of 1,720 units each, all at a stated price of $0.00 per unit. The performance stock units represent target awards that may ultimately vest between 0% and 200% based on performance criteria. On March 3, 819 shares of common stock valued at $207.50 per share were withheld to cover tax obligations tied to previously granted restricted or performance stock units, leaving him with 26,536 common shares held directly.
Onto Innovation Inc. Chief Operating Officer Ramil Yaldaei received several equity awards and had shares withheld to cover taxes. On March 2, he was granted 7,683 shares of common stock and two awards of 1,548 performance stock units each, all at a stated price of $0.00 per unit as part of compensation. On March 3, 615 shares of common stock at $207.50 per share were withheld to satisfy tax obligations tied to prior RSU or PSU vesting, leaving him with 18,436 common shares held directly. The RSUs vest in three equal annual installments, while the performance stock units can ultimately vest between 0% and 200% of the target amount based on specified performance criteria.
ONTO Innovation Inc. Chief Executive Officer Michael P. Plisinski reported equity compensation and a related tax-withholding share disposition. He received a grant of 14,479 shares of common stock and two separate performance stock unit awards of 7,239 units each, all at a stated price of $0.00 per unit. The restricted stock units vest in three equal annual installments, while the performance stock units can vest between 0% and 200% of the target amount based on performance criteria. To cover tax obligations from vesting of prior awards, 3,742 common shares were withheld at $207.50 per share, leaving him with 179,242 common shares held directly.
ONTO Innovation senior vice president and general counsel Yoon Ah Oh received equity awards and had shares withheld for taxes. On March 2, she was granted 2,408 shares of common stock as restricted stock units that vest in equal one-third installments over three years, plus two performance stock unit awards of 1,204 units each, with actual vesting between 0% and 200% of the target amount based on performance criteria. On March 3, 417 common shares were withheld at $207.50 per share to satisfy tax withholding obligations tied to previously granted RSU or PSU awards, leaving her with 21,640 common shares directly owned afterward.
Chen Shirley reported acquisition or exercise transactions in this Form 4 filing.
Onto Innovation SVP Customer Success Shirley Chen reported equity awards that increase her direct ownership stake. On March 2, 2026, she received grants of performance stock units and 2,523 shares of common stock at a grant price of $0.00 per share.
The common stock grant is structured as restricted stock units that vest in three equal annual installments over three years from the award date. The performance stock units represent a target number of shares, with the actual amount that vests ranging from 0% to 200% based on specified performance criteria over the award period.
Onto Innovation Inc. Chief Operating Officer Ramil Yaldaei reported equity award activity tied to performance and tax withholding. On March 1, 2026, performance stock units granted on March 1, 2024 settled in common shares after performance criteria were met at 77% of target. Some of the resulting shares were automatically withheld by the company at a price of $215.89 per share to cover tax obligations, rather than being sold on the open market. After these settlement and withholding transactions, Yaldaei directly owned 11,368 shares of Onto Innovation common stock.
Onto Innovation Inc. Chief Executive Officer Michael P. Plisinski reported equity award activity tied to performance stock units and related tax withholding. On March 1, 2026, 5,971 performance stock units granted on March 1, 2024 settled into 4,597 shares of common stock at a stated price of $0.0000 per share after performance criteria were achieved at 77% of target. To cover tax withholding obligations from these and other equity awards, 2,222 and 1,925 shares of common stock were disposed of at $215.89 per share through share withholding rather than open-market sales. Following these transactions, Plisinski directly owned 168,505 shares of Onto Innovation common stock.
Onto Innovation Inc. senior vice president and general counsel Yoon Ah Oh reported equity award activity. On March 1, 2026, 941 performance stock units vested and were settled, resulting in the acquisition of 724 shares of common stock at a stated price of $0.00 per share.
On the same date, 307 shares and 267 shares of common stock were withheld at $215.89 per share to cover tax obligations tied to the vesting of restricted or performance stock units, rather than open-market sales. After these transactions, Yoon Ah Oh directly owned 19,649 common shares.
Onto Innovation Inc.'s Chief Executive Officer Michael P. Plisinski reported equity award activity on common stock. On February 14, 2026, performance stock units granted on February 14, 2023 settled into 18,445 shares of common stock after performance criteria were achieved at 156% of target.
To cover tax withholding obligations tied to this PSU and other equity vesting, 8,919 shares and 3,632 shares of common stock were withheld by the issuer at a price of $217.23 per share. Following these transactions, Plisinski directly owned 168,055 common shares.
ONTO Innovation Inc. senior vice president and general counsel Yoon Ah Oh reported equity award activity. On February 14, 2026, performance stock units granted on February 14, 2023 vested at 156% of target, converting into 3,084 shares of common stock. To cover tax withholding on these and other prior stock-based awards, 1,595 shares of common stock were withheld by the company, leaving the executive with 19,499 shares of directly owned common stock.
ONTO Innovation Inc. (ONTO) disclosed that its Chief Executive Officer and director, Michael Plisinski, made a bona-fide charitable gift of company stock. On 12/24/2025, he transferred 25,000 shares of ONTO common stock as a gift to a Donor Advised Fund at a reported price of $0.0, reflecting the non-cash nature of the donation. After this transaction, he beneficially owned 162,161 shares of ONTO common stock directly.
ONTO Innovation Inc. executive files Form 4 for tax withholding transaction
An executive officer of ONTO Innovation Inc. (ONTO), serving as EVP, Product Solutions Group, reported a stock transaction dated 12/02/2025. The filing shows that 3,183 shares of common stock were disposed of at a price of $154.01 per share in a transaction coded "F," which indicates shares withheld by the company to cover tax obligations on previously granted restricted stock units or performance stock units that vested. Following this withholding event, the executive beneficially owned 23,915 shares of ONTO common stock. This total includes 145 shares purchased on June 30, 2025 under the company’s Employee Stock Purchase Plan.
Ramil Yaldaei, Chief Operating Officer and director of ONTO INNOVATION INC. (ONTO), reported a change in beneficial ownership on 10/03/2025. The filing shows 594 shares of common stock were disposed of at a price of $143.71; the form explains these shares were withheld by the issuer to satisfy tax withholding obligations from the vesting of restricted or performance stock units. After the reported transaction, the reporting person beneficially owns 11,342 shares, which includes 145 shares acquired on 06/30/2025 under the companys Employee Stock Purchase Plan.