Quarterly Large-Scale Business Group Status Disclosure (Individual Company Filing) — Doosan Tesna

Summary

Doosan Tesna has submitted its quarterly conglomerate status disclosure as a member of the Doosan corporate group, led by controlling shareholder Park Jeong-won. The filing covers four regulatory areas: circular shareholding, financial/insurance subsidiary voting rights, intra-group transactions, and debt guarantees. All sections report no applicable items for both the current and prior periods. This is a routine compliance filing with no material changes in group structure, related-party dealings, or credit exposure. Investors seeking the full group-level disclosure are directed to the representative filing submitted by the parent, Doosan Co., Ltd.

Filed	P₀	P₊₅	+5d
May 29, 2026	₩157,300	₩124,100	-21.11%
Feb 27, 2026	₩68,000	₩63,100	-7.21%

Filed

P₀

P₊₅

+5d

May 29, 2026

₩157,300

₩124,100

-21.11%

Feb 27, 2026

₩68,000

₩63,100

-7.21%

Full Translation

Business Group Status Disclosure (Quarterly — Individual Company) Filing version: 6.2 Filing company: Doosan Tesna Co., Ltd. Disclosure of Status for Companies Belonging to a Large-Scale Business Group Corporate group name: Doosan Controlling individual (동일인): Park Jeong-won Representative company of the group: Doosan Co., Ltd. Filing company: Doosan Tesna Co., Ltd. Contact: Kim Seon-ju (Team Leader), Tel: 031-5179-4826 [Note] The representative company for the Doosan corporate group status disclosure is Doosan Co., Ltd. The full group-level disclosure filed by Doosan Co., Ltd. is identical to this individual-company filing; please refer to the group status disclosure submitted by Doosan Co., Ltd. 4. Circular Shareholding Status [ESG] (2) Changes in Circular Shareholding Among Domestic Affiliates [ESG] : Quarterly status and changes in circular shareholding among domestic affiliates <Individual company filing> <Current period circular shareholding status> Not applicable. <Prior period circular shareholding status> Not applicable. <Detailed changes (vs. prior period)> Not applicable. 5. Voting Rights Exercise by Financial/Insurance Subsidiaries [ESG] (1) Status of Voting Rights Exercised by Financial/Insurance Subsidiaries on Shares of Domestic Affiliates [ESG] Not applicable. 6. Transaction Status Between Affiliates and Related Parties (6) Major Goods/Services Transactions Among Affiliates : Transactions above a specified threshold for goods or services with domestic affiliates a. Major goods/services transactions between listed companies and their affiliates (quarterly) Not applicable. (14) Status of Debt Guarantees Among Affiliates : Details of debt guarantees provided for domestic affiliates a. Debt guarantees restricted under the Fair Trade Act: Not applicable. b. Debt guarantees other than those restricted under the Fair Trade Act: Not applicable. c. Performance guarantees, tax payment guarantees, etc.: Not applicable.