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Treasury Shares4220RIKEN TECHNOS CORPORATIONMaterials and Chemicals

Notice Regarding the Purchase of Treasury Shares Through an Off-Auction Purchase (ToSTNeT-3)

On 18 September 2026, the company decided to purchase up to 500,000 treasury shares at a closing price of ¥2,378 per share via ToSTNeT-3. This sets out the specific purchase method under the existing treasury share buyback authorization.

Worth reading
73In focus
0–100. This measures how worthwhile something is to read, not how good or bad the company is.
Direction
Neutral
Direction inferred from the company’s description.
Scale
500000
Shares (maximum)
Wording
Conditional
How definitive the wording is.

Progress against acquisition limit

Off-auction purchase (ToSTNeT-3)

Resolved 31 July 2026 / Acquisition period 3 August 2026 to 30 December 2026

42.7%
Cumulative utilization rate
LimitAmount 47.6%2,293,000 株 remaining
Number of Shares4,000,000 shares (maximum)
47.6%
Cumulative utilization rate
Limit4,613,387,700 円 remaining
Amount¥8,800,000,000 (maximum)

At this pace, the monetary limit will be reached first, and the acquisition will end without using the full share-count limit.

Number of Shares
Limit4,000,000 shares (maximum)
Cumulative total1,707,000 shares (as of 17 September 2026)
Amount
Limit¥8,800,000,000 (maximum)
Cumulative total¥4,186,612,300 (as of 17 September 2026)

消化率と残りは、会社が示した累計・今回と上限から算出しています。進捗率=上限に対してどこまで使ったかの割合です。 ToSTNeT is a system for trading outside the exchange's regular trading hours.

Progress against acquisition limit
ItemDetails
Acquisition date/acquisition period18 September 2026, 8:45 a.m.: Tokyo Stock Exchange off-auction purchase of treasury shares (ToSTNeT-3)
Method of acquisitionOff-auction purchase (ToSTNeT-3)
Cumulative number of shares acquired1,707,000 shares (as of 17 September 2026)
Cumulative acquisition cost¥4,186,612,300 (as of 17 September 2026)
Resolution date31 July 2026
Maximum number of shares to be acquired4,000,000 shares (maximum)
Total acquisition price¥8,800,000,000 (maximum)
Acquisition period under the resolution3 August 2026 to 30 December 2026
Items this document does not state (5)
Total number of shares acquired in this transactionTotal current acquisition pricePercentage of total issued sharesWhether acquisition has been completedAverage Acquisition Price

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.

Because the company determined part of the specific acquisition method for the treasury share purchase based on the resolution of the Board of Directors dated 31 July 2026.

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 the Purchase of Treasury Shares Through an Off-Auction Purchase (ToSTNeT-3) | RIKEN TECHNOS CORPORATION (4220) timely disclosure | Komori