Consolidated Financial Results for the Nine Months Ended December 31, 2025

February 9, 2026

Representative: Yoshihisa Shinya, Representative Director and President

Contact: Ryota Washimori, General Manager, PR&IR Department, Corporate Strategy Division Phone: +81-285-39-7950 Scheduled date to commence dividend payments: -

Preparation of supplementary material on financial results: Yes

Holding of financial results briefing: Yes (for securities analysts and institutional investors)

(Note) Amounts less than one million yen have been omitted.

1. Consolidated financial results for the nine months ended December 31, 2025 (from April 1, 2025 to December 31, 2025)

   (1) Consolidated operating results (cumulative) (Percentage indicates year-on-year changes.)

   	Net sales		Business profit		EBITDA		Operating profit		Profit before tax
   Nine months ended	Millions of yen	%	Millions of yen	%	Millions of yen	%	Millions of yen	%	Millions of yen	%
   December 31, 2025 December 31, 2024	87,296 87,163	0.2 8.0	31,471 31,865	(1.2) 12.6	36,978 36,795	0.5 14.0	30,451 32,848	(7.3) 24.3	30,559 32,487	(5.9) 28.4

   	Profit		Profit attributable to owners of parent		Total comprehensive income		Basic earnings per share	Diluted earnings per share
   Nine months ended	Millions of yen	%	Millions of yen	%	Millions of yen	%	Yen	Yen
   December 31, 2025	21,267	(8.9)	21,267	(8.9)	21,869	(3.4)	126.23	121.25
   December 31, 2024	23,356	26.7	23,356	26.3	22,628	17.2	135.97	130.03

   Notes: 1. For details of business profit and EBITDA, please refer to "* Proper use of earnings forecast, and other special notes, (Business profit and EBITDA)."

2. Effective October 1, 2024, the Company conducted a 3-for-1 split of common shares. Accordingly, basic earnings per share and diluted earnings per share were calculated based on the assumption that the stock split had been conducted at the beginning of the fiscal year ended March 31, 2025.

(2) Consolidated financial position

1. Cash dividends

   	Annual dividends per share
   	First quarter-end	Second quarter-end	Third quarter-end	Fiscal year-end	Total
   	Yen	Yen	Yen	Yen	Yen
   Fiscal year ended March 31, 2025 Fiscal year ending March 31, 2026	- -	78.00 29.00	- -	32.00	-
   Fiscal year ending March 31, 2026 (forecast)				29.00	58.00

   Notes: 1. Revisions to dividend forecast published most recently: None

   2. Effective October 1, 2024, the Company conducted a 3-for-1 split of common shares. As a result, the total annual dividends per share for the year ended March 31, 2025 is not presented, as they cannot be simply aggregated.

2. Forecast of consolidated financial results for the fiscal year ending March 31, 2026 (from April 1, 2025 to March 31, 2026)

(Percentages indicate year-on-year changes.)

Notes: Revisions to earnings forecast published most recently: None

1. Significant changes in the scope of consolidation during the period: None

2. Changes in accounting policies and changes in accounting estimates

   1. Changes in accounting policies required by IFRS: None

   2. Changes in accounting policies due to reasons other than (i) above: None

   3. Changes in accounting estimates: None

3. Number of shares of common shares issued

1. Number of shares issued (including treasury shares)

   As of December 31, 2025: 176,418,500 shares

   As of March 31, 2025: 176,418,500 shares

2. Number of treasury shares

   As of December 31, 2025: 8,910,759 shares

   As of March 31, 2025: 8,375,061 shares

3. Average number of common shares during the period

   Nine months ended December 31, 2025: 168,478,555 shares

   Nine months ended December 31, 2024: 171,777,063 shares

   Notes: 1. Effective October 1, 2024, the Company conducted a 3-for-1 split of common shares. Accordingly, the number of issued shares (common shares) was calculated based on the assumption that the stock split had been conducted at the beginning of the fiscal year ended March 31, 2025.

   1. As the Company has introduced a stock compensation plan which delivers shares with restrictions on transfer, the Company's shares are included in the number of treasury shares at the end of the period mainly for the purpose of allotting them as restricted shares.

   2. As the Company has introduced an Employee Stock Ownership Plan (J-ESOP) and a Board Benefit Trust-Restricted Stock (BBT-RS), the number of shares of the Company held by Custody Bank of Japan, Ltd., (Trust Account E) is

included in the number of treasury shares at the end of the period. In addition, the number of shares of the Company held by Custody Bank of Japan, Ltd., (Trust Account E) was included in the number of treasury shares to be deducted in the calculation of the average number of shares outstanding during the period.

• Review of the Japanese-language originals of the attached consolidated quarterly financial statements by certified public accountants or an audit firm: Yes (voluntary).

• Proper use of earnings forecast, and other special notes (Business profit and EBITDA)

Although business profit and EBITDA are not disclosures under IFRS, the Company believes that these disclosures provide useful information to investors. The details of business profit and EBITDA are as follows.

Business profit: A profit indicator that measures the Company's recurring operating results, which are determined by deducting cost of sales and selling, general and administrative expenses from net sales

EBITDA: A profit indictor that is determined by adding back depreciation, which is recorded as cost of sales and selling, general and administrative expenses, to business profit

(Method of obtaining supplementary materials on financial results)

Supplementary materials on financial results will be posted on our website at https://www.dexerials.jp/en/ir/library/index.html.

(Disclaimer with respect to earnings and other forecasts)

The forward-looking statements including results forecasts contained in this document are based on information currently available to the Company and certain assumptions that the Company deems reasonable. Accordingly, the Company does not intend to

promise their achievement. Actual results may differ from these forecasts and forward-looking statements due to various factors.

Contents for Attached Materials

1. Overview of Consolidated Financial Results 2

   1. Operating results 2

   2. Financial position 2

   3. Forward-looking statements including consolidated earnings forecast 2

2. Quarterly consolidated Financial Statements and Notes 3

   1. Quarterly consolidated statement of financial position 3

   2. Quarterly consolidated statement of profit or loss and quarterly consolidated statement of comprehensive 5

      income ..………………………………………………………………………………………………………………….

   3. Notes to quarterly consolidated financial statements… 7

(Going concern assumption) 7

(Quarterly consolidated statement of cash flows) 7

(Significant changes in the amount of equity attributable to owners of parent) 7

(Segment information) 8

1. Overview of Consolidated Financial Results
   1. Operating results

      The Group's operating results for the nine months ended December 31, 2025 (hereinafter, the "period under review") were as follows: Net sales were ¥87,296 million (up 0.2% year-on-year), business profit was ¥31,471 million (down 1.2% year-on-year), operating profit was ¥30,451 million (down 7.3% year-on-year), and profit attributable to owners of parent was ¥21,267 million (down 8.9% year-on-year).

      During the period under review, although the yen appreciated compared with the same period of the previous fiscal year and the previous period included sales of Phosphor films (which ended at the end of the previous semi-annual consolidated period) as well as a buildup of new deliveries of Anti-reflection films (ARF) for automotives, the Group achieved growth in sales of high-value-added products such as optical semiconductors for data centers and Pre-cut Anisotropic conductive films (ACF) for camera modules. As a result, net sales increased year-on-year.

      Despite the increase in net sales, business profit decreased due to an increase in fixed costs associated with growth investments, particularly in optical semiconductors. Operating profit and profit attributable to owners of parent also declined year-on-year. Operating results by segment and sales by product category are presented as follows.

      1. Optical Materials and Components

         During the period under review, the Optical films product category reported a year-on-year decrease in sales due to the impact of sales in the previous period, which included Phosphor films and a buildup of new deliveries of Anti-reflection films (ARF) for automotives, as well as a delay in the delivery timing of ARF for laptop PC displays in the third quarter.

         The Optical resin materials product category reported a year-on-year decrease in sales as shipment volumes decreased for certain models using Optical elastic resins (SVR), despite an increase in shipment volumes for certain models adopting Smart precision Adhesives.

         As a result, the business segment reported net sales of ¥37,672 million (down 9.7% year-on-year) and business profit of ¥12,002 million (down 12.0% year-on-year).

      2. Electronic Materials and Components

         During the period under review, the Anisotropic conductive films (ACF) product category reported a year-on-year increase in sales as usage of high-value-added Pre-cut ACF for camera modules increased, despite the impact of pull-forward demand in the previous fiscal year for display-related ACF.

         The Surface mount fuse product category reported a year-on-year increase in sales due to a recovery in production following the completion of inventory adjustments by a major customer for products for power tools in the previous fiscal year, in addition to continued sales of BBU (battery backup units) for data centers.

         The Photonics product category reported a year-on-year increase in sales due to an increase in the shipping quantity of high-speed response photodiodes for optical transceivers and monitor photodiodes for telecommunications equipment in optical semiconductors.

         As a result, the business segment reported net sales of ¥50,292 million (up 9.3% year-on-year) and business profit of ¥19,468 million (up 6.8% year-on-year).

         Note: Segment sales include inter-segment transactions.

   2. Financial position

      Total assets at the end of the period under review amounted to ¥155,545 million, an increase of ¥3,724 million from the end of the previous fiscal year, due to increases in property, plant and equipment, trade and other receivables, which were partially offset by decreases in cash and cash equivalents and deferred tax assets.

      Total liabilities amounted to ¥53,592 million, a decrease of ¥2,313 million from the end of the previous fiscal year, due to decreases in income taxes payable and interest-bearing debt under current liabilities, despite increases in other financial liabilities and trade and other payables.

      Total equity amounted to ¥101,953 million, an increase of ¥6,037 million from the end of the previous fiscal year, due to an increase in retained earnings, despite an increase in treasury shares.

   3. Forward-looking statements including consolidated earnings forecast

   The full-year earnings forecast for the fiscal year ending March 31, 2026 remains unchanged from that announced in the

   "Consolidated Financial Results for the Six Months Ended September 30, 2025" disclosed on November 12, 2025.

2. Quarterly Consolidated Financial Statements and Notes

   1. Quarterly consolidated statement of financial position

Assets

Current assets

Previous fiscal year (As of March 31, 2025)

(Millions of yen)

Current quarter

(As of December 31, 2025)

-