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Occurring Fact9449GMO internet group,Inc.Information and Communications, Services and Others

Update on Compensation for Unauthorized Access at Consolidated Subsidiary GMOインターネット株式会社

Consolidated subsidiary GMOインターネット began individually contacting eligible customers on 6 November 2026 regarding compensation for customer losses caused by unauthorized access. The compensation amount cannot yet be calculated because the number of eligible customers and covered transactions have not been determined.

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Status of Compensation for Unauthorized Access at Consolidated Subsidiary GMOインターネット株式会社

Subject Entity

GMO Internet, Inc. (a consolidated subsidiary of the filing company)

Target Locations / Products

Onamae.com Desktop Cloud service

This disclosure11/06/2026
Cause

Unauthorized access by a third party

Amount of Impact on Business Performance

Cannot yet be calculated. The compensation amount has not been calculated because the number of eligible customers and covered transactions have not yet been confirmed.

Impact on Earnings Forecast

The company plans to provide an outlook on the future calculation of the impact on results at the results briefing on 13 November.

Outlook

The company began individually contacting contract customers on 6 November 2026 and will promptly announce the compensation amount once it can be calculated based on the status of compensation applications. The company plans to provide updates through its website and other channels as information becomes available.

Planned follow-up disclosure

The company plans to provide an update at the respective results briefings for the company and GMOインターネット, to be held on 13 November 2026, on the status of compensation applications and the outlook for calculating the impact on results.

Event that occurred
ItemDetails
Event nameStatus of Compensation for Unauthorized Access at Consolidated Subsidiary GMOインターネット株式会社
Subject EntityGMO Internet, Inc. (a consolidated subsidiary of the filing company)
Target Locations / ProductsOnamae.com Desktop Cloud service
CauseUnauthorized access by a third party
Amount of Impact on Business PerformanceCannot yet be calculated. The compensation amount has not been calculated because the number of eligible customers and covered transactions have not yet been confirmed.
Impact on Earnings ForecastThe company plans to provide an outlook on the future calculation of the impact on results at the results briefing on 13 November.
OutlookThe company began individually contacting contract customers on 6 November 2026 and will promptly announce the compensation amount once it can be calculated based on the status of compensation applications. The company plans to provide updates through its website and other channels as information becomes available.
Planned follow-up disclosureThe company plans to provide an update at the respective results briefings for the company and GMOインターネット, to be held on 13 November 2026, on the status of compensation applications and the outlook for calculating the impact on results.
Items this document does not state (17)
Date of occurrenceDate recognized / date notice receivedAccounting period in which recognizedType 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' liabilityVoting rights ownership percentage before the changeVoting rights ownership percentage after the change

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.

The company explained that the compensation amount cannot currently be calculated because the number of eligible customers and covered transactions have not yet been confirmed.

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.
Update on Compensation for Unauthorized Access at Consolidated Subsidiary GMOインターネット株式会社 | GMO internet group,Inc. (9449) timely disclosure | Komori