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Other Disclosures2154Open Up Group Inc.Information and Communications, Services and Others

Notice Regarding Continued Inclusion in the JPX-Nikkei Index 400 and New Selection as a Constituent of the JPX-Nikkei Mid and Small Cap Index

Open Up Group Inc. was selected for the JPX-Nikkei Index 400 for the second consecutive year and was also newly selected as a constituent of the JPX-Nikkei Mid and Small Cap Index. The periodic rebalancing is scheduled for 31 August 2026.

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50Recurring
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Direction
Improvement
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Scale
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Wording
Definitive
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Announced details

JPX-Nikkei Index 400JPX-Nikkei Mid and Small Cap Index
Applicable field (uses covered by this announcement)

Stock markets, investment, and corporate evaluation with a focus on capital efficiency

Launch date31 August 2026 (scheduled; date of the periodic rebalancing of constituents)
What the company reported numerically
Usage history

Selected for the JPX-Nikkei Index 400 for the second consecutive year

Relationship between the counterparty and the company
Open Up Group Inc.2154
Relationship with the Company

The Company was selected as a constituent of the stock indices jointly calculated by the two companies. Capital and personnel relationships: Not disclosed.

CounterpartyJPX Market Innovation & Research, Inc.Nikkei Inc.

JPX Market Innovation & Research, Inc. and Nikkei Inc. jointly calculate both indices. Other details: Not disclosed.

In this announcement the company addresses none of Contract Value / Offering price / Impact on Business Performance.

Source (materials cited by the company)

Tokyo Stock Exchange website

Announced details
ItemDetails
Names of Products / Services CoveredJPX-Nikkei Index 400, JPX-Nikkei Mid and Small Cap Index
CounterpartyJPX Market Innovation & Research, Inc., Nikkei Inc.
Counterparty overviewJPX Market Innovation & Research, Inc. and Nikkei Inc. jointly calculate both indices. Other details: Not disclosed.
Relationship with the CompanyThe Company was selected as a constituent of the stock indices jointly calculated by the two companies. Capital and personnel relationships: Not disclosed.
Launch date31 August 2026 (scheduled; date of the periodic rebalancing of constituents)
Applicable areaStock markets, investment, and corporate evaluation with a focus on capital efficiency
Usage historySelected for the JPX-Nikkei Index 400 for the second consecutive year
SourceTokyo Stock Exchange website
Items this document does not state (10)
Contract ValueOffering priceContract DateAward/certification nameAwarding / certifying bodyRegistration number and expiry dateLocationLocation scaleQuantitative EffectsImpact on Business Performance

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 believes that its high capital efficiency (ROE), sustainable earnings growth, and initiatives to strengthen its corporate governance framework were objectively evaluated by the stock market.

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 Continued Inclusion in the JPX-Nikkei Index 400 and New Selection as a Constituent of the JPX-Nikkei Mid and Small Cap Index | Open Up Group Inc. (2154) timely disclosure | Komori