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Occurring Fact268ARigaku Holdings CorporationElectrical Equipment and Precision Instruments

Notice Regarding Changes in the Largest Shareholder, Which Is a Major Shareholder, and Other Affiliated Companies

All shares in Rigaku Holdings Corporation held by Onto Innovation will be transferred to its wholly owned subsidiary, Onto Japan. As a result, Onto Japan will become the new largest shareholder and other affiliated company, while Onto Innovation's ownership will change from direct to indirect.

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Change in the largest major shareholder and other affiliated company

Subject Entity

オントゥ・イノベーション・ジャパン株式会社, Onto Innovation Inc. and Rigaku Holdings Corporation

Target Locations / Products

Common shares of Rigaku Holdings Corporation

Occurrence1 October 2026 (scheduled completion date of the share transfer procedure)
Awareness or receipt of notice29 September 2026 (date the notice of the agreement concerning this share transfer was received)
This disclosure09/30/2026
Cause

To transfer all common shares in the company owned by Onto Innovation to its wholly owned subsidiary, Onto Japan. To maintain the existing agreement, an agreement was executed to add Onto Japan to the capital and business alliance agreement.

Change in voting rights ownership ratio

Onto Japan0.00%→26.99%(+26.99pt)

The voting rights ownership percentage is the proportion of the voting rights exercisable at a shareholders' meeting held by the shareholder.

Voting rights ownership percentage before the change

Onto Japan: no voting rights held (0 rights, 0%). Onto Innovation: directly holds 611,234 voting rights (61,123,436 shares), representing 26.99%. Based on the total number of voting rights held by all shareholders as of 31 August 2026.

Voting rights ownership percentage after the change

Onto Japan: directly holds 611,234 voting rights (61,123,436 shares), representing 26.99%, and ranks first. Onto Innovation: no direct ownership; combined ownership through Onto Japan is 611,234 voting rights (61,123,436 shares), representing 26.99%.

Amount of Impact on Business Performance

Amount: Not disclosed. The impact of this change on the company's financial results is immaterial.

Outlook

The change is expected to occur upon completion of the share transfer procedure on 1 October 2026. The impact of this change on the company's financial results is immaterial.

Event that occurred
ItemDetails
Event nameChange in the largest major shareholder and other affiliated company
Date of occurrence1 October 2026 (scheduled completion date of the share transfer procedure)
Date recognized / date notice received29 September 2026 (date the notice of the agreement concerning this share transfer was received)
Subject Entityオントゥ・イノベーション・ジャパン株式会社, Onto Innovation Inc. and Rigaku Holdings Corporation
Target Locations / ProductsCommon shares of Rigaku Holdings Corporation
CauseTo transfer all common shares in the company owned by Onto Innovation to its wholly owned subsidiary, Onto Japan. To maintain the existing agreement, an agreement was executed to add Onto Japan to the capital and business alliance agreement.
Amount of Impact on Business PerformanceAmount: Not disclosed. The impact of this change on the company's financial results is immaterial.
Voting rights ownership percentage before the changeOnto Japan: no voting rights held (0 rights, 0%). Onto Innovation: directly holds 611,234 voting rights (61,123,436 shares), representing 26.99%. Based on the total number of voting rights held by all shareholders as of 31 August 2026.
Voting rights ownership percentage after the changeOnto Japan: directly holds 611,234 voting rights (61,123,436 shares), representing 26.99%, and ranks first. Onto Innovation: no direct ownership; combined ownership through Onto Japan is 611,234 voting rights (61,123,436 shares), representing 26.99%.
OutlookThe change is expected to occur upon completion of the share transfer procedure on 1 October 2026. The impact of this change on the company's financial results is immaterial.
Items this document does not state (15)
Accounting period in which recognizedImpact on Earnings ForecastType of litigation or proceedingCourt or authorityPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionSuspended operationsScheduled resumption dateInvestigation structureMeasures to prevent recurrenceDirectors' and officers' liabilityPlanned follow-up disclosure

These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.

The reasons the company gives

The company's own explanation, not something inferred from the numbers.

To maintain the existing agreement after this share transfer, an agreement was executed to add Onto Japan to the capital and business alliance agreement between the company and Onto Innovation.

How to read this page

This is not the documentKomori reads the disclosure the company filed and writes this summary. Figures are as stated by the company and are not audited.
Weight is not a verdictIt measures how much this changes what the company had already told the market. It is not a view on the shares.
Corrections happenIf the company reissues this disclosure, the page is rebuilt from the corrected version and the revision number moves up.
Notice Regarding Changes in the Largest Shareholder, Which Is a Major Shareholder, and Other Affiliated Companies | Rigaku Holdings Corporation (268A) timely disclosure | Komori