# EDGAR Filing Document

**Accession Number:** 0000704532
**File Stem:** 0001193125-25-283980
**Filing Date:** 2025-11
**Character Count:** 21553
**Document Hash:** bbebebb80367be07b2449c11f8f4c6aa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-283980.hdr.sgml**: 20251117

**ACCESSION NUMBER**: 0001193125-25-283980

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20251117

**ITEM INFORMATION**: Completion of Acquisition or Disposition of Assets

**ITEM INFORMATION**: Unregistered Sales of Equity Securities

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251117

**DATE AS OF CHANGE**: 20251117

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ONTO INNOVATION INC.
- **CENTRAL INDEX KEY:** 0000704532
- **STANDARD INDUSTRIAL CLASSIFICATION:** MEASURING & CONTROLLING DEVICES, NEC [3829]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 942276314
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1226

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39110
- **FILM NUMBER:** 251489416

**BUSINESS ADDRESS:**
- **STREET 1:** 16 JONSPIN ROAD
- **CITY:** WILMINGTON
- **STATE:** MA
- **ZIP:** 01887
- **BUSINESS PHONE:** 9782536200

**MAIL ADDRESS:**
- **STREET 1:** 16 JONSPIN ROAD
- **CITY:** WILMINGTON
- **STATE:** MA
- **ZIP:** 01887

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Onto Innovation Inc.
- **DATE OF NAME CHANGE:** 20191025

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NANOMETRICS INC
- **DATE OF NAME CHANGE:** 19920703

?xml version='1.0' encoding='ASCII'? 8-K

**UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549**

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## FORM 8-K

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**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported):** November 17, 2025<br>

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Onto Innovation Inc.

**(Exact name of Registrant as Specified in Its Charter)**

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| | | |
|:---|:---|:---|
| Delaware | 001-39110 | 94-2276314 |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission File Number)** | **(IRS Employer<br>Identification No.)** |
| 16 Jonspin Road |  |  |
| Wilmington**,** Massachusetts |  | 01887 |
| **(Address of Principal Executive Offices)** |  | **(Zip Code)** |

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**Registrant's Telephone Number, Including Area Code:** (978) 253-6200<br>

Not applicable

**(Former Name or Former Address, if Changed Since Last Report)**

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:**

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| | | |
|:---|:---|:---|
| **<br>Title of each class** | **Trading<br>Symbol(s)** | **<br>Name of each exchange on which registered** |
| Common Stock, $0.001 par value per share | ONTO | New York Stock Exchange |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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**Item 2.01. Completion of Acquisition or Disposition of Assets**

On November 17, 2025, Onto Innovation Inc. (the "Company") completed the previously announced acquisition of Semilab USA LLC ("Semilab USA"), pursuant to the Equity Purchase Agreement (the "Purchase Agreement"), dated as of June 27, 2025, by and among the Company, Semilab International Zrt. (the "Seller"), Semilab Zrt. and Semilab USA, as amended by the Amendment to Equity Purchase Agreement, dated October 9, 2025.

As previously disclosed, pursuant the Purchase Agreement, the Company acquired all of the outstanding membership interests of Semilab USA from the Seller for $432,310,000 in cash (subject to certain customary purchase price adjustments) and 641,771 shares of the Company's common stock, par value $0.001 per share (the foregoing transactions, the "Semilab USA Acquisition").

The foregoing description of the Purchase Agreement is qualified entirely by reference to the full text of the Purchase Agreement and the amendment thereto, copies of which are filed as Exhibit 2.1 to the Current Report on Form 8-K filed with the Securities and Exchange Commission (the "SEC") on June 30, 2025 and Exhibit 2.1 to the Current Report on Form 8-K filed with the SEC on October 10, 2025, respectively, both incorporated herein by reference.

**Item 3.02. Unregistered Sale of Equity Securities** 

As described in Item 2.01, the Company issued 641,771 shares of Common Stock to the Seller pursuant to the Purchase Agreement. The issuance was exempt from registration pursuant to Section 4(a)(2) of the Securities Act of 1933, as amended (the "Securities Act"). The Seller has represented that it is an "accredited investor" as defined in Rule 501 under the Securities Act and that the Common Stock is being acquired for investment purposes and not with a view toward or for sale in connection with any distribution thereof.

**Item 7.01. Regulation FD Disclosure**

On November 17, 2025, the Company issued a press release announcing the closing of the Semilab USA Acquisition and updating its guidance for the fourth quarter of fiscal year 2025. A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated into this report by reference. The information contained in Item 7.01 of this Current Report on Form 8-K (including Exhibit 99.1) shall be deemed furnished and not "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act") or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation by reference language in such filing, except as expressly set forth by specific reference in such filing.

## Item 9.01 Financial Statements and Exhibits.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) Exhibits

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| | |
|:---|:---|
| **<u>Exhibit No.</u>** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**<u>Description of Exhibit</u>** |
| &nbsp;&nbsp;&nbsp;[<u>2.1\*</u>](https://www.sec.gov/Archives/edgar/data/704532/000119312525152097/d28444dex21.htm)<br>| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[<u>Equity Purchase Agreement, dated as of June 27, 2025, by and among Onto Innovation Inc., Semilab USA LLC, Semilab International Zrt. and Semilab Zrt. (incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K, filed with the SEC on June 30, 2025).</u>](https://www.sec.gov/Archives/edgar/data/704532/000119312525152097/d28444dex21.htm) |
| &nbsp;&nbsp;&nbsp;[<u>2.2\*</u>](https://www.sec.gov/Archives/edgar/data/704532/000119312525236464/onto-ex2_1.htm)<br>| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[<u>Amendment to Equity Purchase Agreement, dated as of October 9, 2025, by and among Onto Innovation Inc., Semilab USA LLC, Semilab International Zrt. and Semilab Zrt. (incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K, filed with the SEC on October 10, 2025).</u>](https://www.sec.gov/Archives/edgar/data/704532/000119312525236464/onto-ex2_1.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[<u>99.1</u>](onto-ex99_1.htm) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[<u>Press Release, dated November 17, 2025</u>](onto-ex99_1.htm) |
| &nbsp;&nbsp;&nbsp;104 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cover Page Interaction Data File (embedded within the Inline XBRL document) |

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\* Schedules omitted pursuant to Item 601(b)(2) of Regulation S-K. The Company agrees to furnish supplementally a copy of any omitted schedule or exhibit to the SEC upon request.

**CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS**

This Current Report on Form 8-K contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 (the "Act") which include statements relating to the Company's business momentum and future growth; the benefit to customers and the capabilities of the Company's products and customer service; the Company's ability to both deliver products and services consistent with our customers' demands and expectations and strengthen its market position, the Company's beliefs about market opportunities, the benefits of the Semilab USA Acquisition to the Company, its stockholders and its customers, as well as other matters that are not purely historical data. The Company wishes to take advantage of the "safe harbor" provided for by the Act and cautions investors not to place undue reliance on any forward-looking statements and that actual results may differ materially from those

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projected as a result of various factors, including risks and uncertainties, many of which are beyond the Company's control. Such factors include, but are not limited to, unexpected costs, charges, or expenses resulting from the Semilab USA Acquisition; failure to realize the anticipated benefits of the Semilab USA Acquisition, including as a result of delay in completing the Semilab USA Acquisition or integrating the acquired business with the business of the Company; difficulties and delays in achieving revenue and cost synergies anticipated to be realized from the Semilab USA Acquisition; evolving legal, regulatory, and tax regimes; changes in economic, financial, political, and regulatory conditions, in the United States and elsewhere, and other factors that contribute to uncertainty and volatility, natural and man-made disasters, civil unrest, pandemics, geopolitical uncertainty, and conditions that may result from legislative, regulatory, trade, and policy changes; risks related to disruption of management time from ongoing business operations due to the Semilab USA Acquisition; the risk that the Semilab USA Acquisition and its announcement could have an adverse effect on the ability of the Company or the acquired business to retain customers and retain and hire key personnel and maintain relationships with customers, suppliers, employees, stockholders, strategic partners and other business relationships and on their operating results and business generally; the Company's ability to deploy its resources to improve its position in its core markets; its ability to weather difficult economic environments; its ability to open new market opportunities and target high-margin markets; the strength/weakness of the back-end and/or front-end semiconductor market segments; fluctuations in customer capital spending; the Company's ability to effectively manage its supply chain and adequately source components from suppliers to meet customer demand; its ability to adequately protect its intellectual property rights and maintain data security; its ability to effectively maneuver global trade issues and changes in trade and export license policies; the Company's ability to maintain relationships with its customers and manage appropriate levels of inventory to meet customer demands; and the Company's ability to successfully integrate acquired businesses and technologies. Additional information and considerations regarding the risks faced by the Company are available in the Company's Annual Report on Form 10-K for the year ended December 28, 2024, and other filings with the Securities and Exchange Commission. As the forward-looking statements are based on the Company's current expectations, the Company cannot guarantee any related future results, levels of activity, performance or achievements. The Company does not assume any obligation to update the forward-looking information contained in this Current Report on Form 8-K, except as required by law. Neither future distribution of this Current Report on Form 8-K nor the continued availability of this Current Report on Form 8-K should be deemed to constitute an update or re-affirmation of these statements as of any future date.

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | | |
|:---|:---|:---|:---|
|  |  |  | **Onto Innovation Inc.** |
| Date: | November 17, 2025 | By:  | /s/ Yoon Ah Oh |
|  |  |  | Senior Vice President, General Counsel & Corporate Secretary |

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## Exhibit 99.1

EXHIBIT 99.1

**Onto Innovation Completes Acquisition of Unique Materials Composition and Electrical Analysis Product Lines from Semilab International** 

*Acquisition strengthens Onto's position in advanced materials characterization for advanced logic/memory, specialty and advanced packaging segments*

**Wilmington, Mass**., November 17, 2025 **–** Onto Innovation Inc. (NYSE: ONTO) today announced the successful closing of its previously announced acquisition of key product lines from the materials analysis business of Semilab International. Valued at approximately $495 million, the transaction adds three advanced product lines—FAaST<sup>®</sup>, CnCV<sup>®</sup> and MBIR—to Onto Innovation's portfolio, significantly enhancing the company's capabilities in inline wafer contamination monitoring, materials characterization and unique surface charge metrology.

"We're thrilled to welcome the talented team of engineering, support, and applications, and all other functions that have made these products so successful to Onto Innovation. Semilab customers can expect uninterrupted service, further enhanced by Onto Innovation's global support and manufacturing infrastructure," said Mike Plisinski, chief executive officer of Onto Innovation. "This acquisition strengthens our materials portfolio in high-growth segments like advanced logic, AI-enabling advanced packaging, and power semiconductors. The combination of Semilab's products alongside Onto's OCD or defect inspection capabilities will enable more accurate electrical defectivity location and characterization, not previously available in the industry, greatly reducing the number of latent defective devices sold into the market and ultimately generating higher value for our customers."

For the fourth quarter, the Company is updating its revenue guidance range to $258 to $275 million as the acquisition is expected to contribute approximately $8 to $10 million of revenue from today through January 3, 2026. Although the acquired business is performing at a level consistent with the expected run rate, the majority of fourth quarter revenue was recognized prior to today's close due to previously committed customer shipment dates. Excluding the impact of purchase accounting, the acquisition is expected to be immediately accretive to margins and add approximately $0.02 to $0.04 to diluted earnings per share in the fourth quarter. The Company continues to expect the acquired product lines to contribute approximately $120 million in revenue in 2026, with revenue likely weighted towards the second half of the year. The Company will provide additional commentary on its next earnings call in early 2026.

Barclays Capital Inc. served as financial advisor, and Simpson Thacher & Bartlett LLP as legal advisor, to Onto Innovation in connection with the transaction. Semilab was advised by Needham & Company, LLC and Hill, Ward & Henderson P.A.

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EXHIBIT 99.1

**About Onto Innovation Inc.**

Onto Innovation is a leader in process control, combining global scale with an expanded portfolio of leading-edge technologies that include: un-patterned wafer quality; 3D metrology spanning chip features from nanometer scale transistors to large die interconnects; macro defect inspection of wafers and packages; metal interconnect composition; factory analytics; and lithography for advanced semiconductor packaging.

Our breadth of offerings across the entire semiconductor value chain combined with our connected thinking approach results in a unique perspective to help solve our customers' most difficult yield, device performance, quality, and reliability issues. Onto Innovation strives to optimize customers' critical path of progress by making them smarter, faster and more efficient.

Headquartered in Wilmington, Massachusetts, Onto Innovation supports customers with a worldwide sales and service organization.

Additional information can be found at www.ontoinnovation.com.

**Forward Looking Statements**

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 (the "Act") which include statements relating to Onto Innovation's business momentum and future growth; the benefit to customers and the capabilities of Onto Innovation's products and customer service; Onto Innovation's ability to both deliver products and services consistent with our customers' demands and expectations and strengthen its market position, Onto Innovation's beliefs about market opportunities; the benefits of the transaction with Semilab International (the "Transaction") to Onto Innovation, its stockholders and its customers; as well as other matters that are not purely historical data. Onto Innovation wishes to take advantage of the "safe harbor" provided for by the Act and cautions you not to place undue reliance on any forward-looking statements and that actual results may differ materially from those projected as a result of various factors, including risks and uncertainties, many of which are beyond Onto Innovation's control. Such factors include, but are not limited to, unexpected costs, charges, or expenses resulting from the Transaction; failure to realize the anticipated benefits of the Transaction, including as a result of delay integrating the acquired business with the business of Onto Innovation; difficulties and delays in achieving revenue and cost synergies anticipated to be realized from the Transaction; evolving legal, regulatory, and tax regimes; changes in economic, financial, political, and regulatory conditions, in the United States and elsewhere, and other factors that contribute to uncertainty and volatility, natural and man-made disasters, civil unrest, pandemics, geopolitical uncertainty, and conditions that may result from legislative, regulatory, trade, and policy changes; risks related to disruption of management time from ongoing business operations due to the

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EXHIBIT 99.1

Transaction; the risk that the Transaction and its announcement could have an adverse effect on the ability of Onto Innovation or the acquired business to retain customers and retain and hire key personnel and maintain relationships with customers, suppliers, employees, stockholders, strategic partners and other business relationships and on their operating results and business generally; the Company's ability to leverage its resources to improve its position in its core markets; its ability to weather difficult economic environments; its ability to open new market opportunities and target high-margin markets; the strength/weakness of the back-end and/or front-end semiconductor market segments; fluctuations in customer capital spending and any potential impact as a result of the novel coronavirus situation; the Company's ability to effectively manage its supply chain and adequately source components from suppliers to meet customer demand; its ability to adequately protect its intellectual property rights and maintain data security; its ability to effectively maneuver global trade issues and changes in trade and export license policies; the Company's ability to maintain relationships with its customers and manage appropriate levels of inventory to meet customer demands; and the Company's ability to successfully integrate acquired businesses and technologies. Additional information and considerations regarding the risks faced by Onto Innovation are available in Onto Innovation's Annual Report on Form 10-K for the year ended December 28, 2024, and other filings with the Securities and Exchange Commission. As the forward-looking statements are based on Onto Innovation's current expectations, the Company cannot guarantee any related future results, levels of activity, performance or achievements. Onto Innovation does not assume any obligation to update the forward-looking information contained in this press release, except as required by law. Neither future distribution of this communication nor the continued availability of this communication in archive form on the Company's website should be deemed to constitute an update or re-affirmation of these statements as of any future date.

###

Source: Onto Innovation Inc.

ONTO-IC

**Contacts:**

Investor Relations:

Sidney Ho, +1 408.376.9163

sidney.ho@ontoinnovation.com

Press:

Amy Shay, +1 952.259.1794

amy.shay@ontoinnovation.com

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