Material event report (spin-off)

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Material Event Report (Decision on Company Spin-off) Hyundai Mobis Co., Ltd. Material Event Report / Korea Exchange Reporting Obligation To the Financial Services Commission / Korea Exchange September 30, 2026

Company name: Hyundai Mobis Co., Ltd. CEO: Lee Gyu-seok Head office: 203 Teheran-ro, Gangnam-gu, Seoul Tel: 02-2018-5114 Website: http://www.mobis.com Preparer: Finance Officer Kim Do-hyung, Tel 02-2018-5207

Decision on Company Spin-off

1. Spin-off method (1) The target business will be spun off through a simple physical (split-off) spin-off to establish a newly incorporated spin-off company; after the spin-off, the splitting company will continue as a listed company, and the newly incorporated spin-off company will be an unlisted company. (i) Splitting company (surviving company) - Company name: Hyundai Mobis Co., Ltd. - Business division: all business divisions except the division subject to the spin-off. (ii) Newly incorporated spin-off company - Company name: Hyundai Mobis Lamp Co., Ltd. (tentative name) - Business division: the business division subject to the spin-off (automotive lamp business division). (2) The spin-off effective date is scheduled for 00:00 on April 1, 2027. However, the spin-off effective date may be changed by resolution of the splitting company's board of directors, or by decision of the CEO under delegated authority from the board. (3) The splitting company will carry out the spin-off through a special resolution of the shareholders' meeting pursuant to Article 530-3, Paragraphs 1 and 2 of the Commercial Act. Pursuant to Article 530-9, Paragraph 2 of the same Act, the newly incorporated spin-off company will bear only the obligations (including liabilities; the same applies hereafter in this paragraph) transferred to it from among the splitting company's pre-spin-off obligations, and will not bear joint liability for obligations not transferred to it. Likewise, the surviving splitting company will bear only the obligations not transferred to the newly incorporated spin-off company, and will not bear joint liability for obligations transferred to the newly incorporated spin-off company. Pursuant to Articles 530-9 and 527-5 of the Commercial Act, the splitting company will publish a notice inviting creditors to submit objections and will separately notify known creditors, with an objection period of at least one month, to ensure full creditor protection under the relevant provisions. (4) Property transferred due to the spin-off shall follow the provisions of Article 5 (Matters Concerning the Newly Incorporated Spin-off Company), Paragraph (7) (property of the splitting company to be transferred to the newly incorporated spin-off company and its value) and Paragraph (8) (matters concerning cases where the newly incorporated spin-off company bears only the obligations designated in the spin-off plan to be assumed) of the spin-off plan; where it is unclear under these provisions whether certain property is subject to the spin-off, this shall be determined pursuant to Paragraphs (5) through (10) of the "Method of Spin-off" section of the spin-off plan. (5) Unless otherwise specified in the spin-off plan, all active and passive property belonging to the splitting company, and other rights, obligations and factual relationships of economic value (including public-law rights and obligations, and including permits/licenses, employment relationships, contractual relationships, litigation, etc.) shall, in principle, belong to the newly incorporated spin-off company if they are (i) reasonably necessary for the newly incorporated spin-off company to carry on the spun-off business division on a stand-alone basis from the spin-off effective date at substantially the same or similar level as before the spin-off, or (ii) exclusively or primarily related to the spun-off business division; otherwise they shall belong to the surviving splitting company. (6) The method for determining the assets, liabilities and capital of the newly incorporated spin-off company shall, in principle, allocate to the newly incorporated spin-off company all assets, contracts, rights, liabilities and obligations related to the splitting company's spun-off business division, and allocate to the surviving splitting company those not belonging to the spun-off business division; the asset, liability and capital amounts of each company shall be determined by comprehensively considering the future operating and investment plans of each company and applicable legal requirements. (7) With respect to the splitting company's business, obligations that arise or become fixed after the spin-off effective date due to acts or facts occurring before the spin-off effective date, or obligations that had already arisen or become fixed before the spin-off effective date but were not reflected in the spin-off plan due to lack of awareness or other circumstances (provided that, regardless of the relevant business division, the splitting company's obligations or liabilities related to violations or non-performance of laws or contracts before the spin-off effective date, and public- or private-law contingent liabilities including but not limited to litigation, fines, administrative penalties, criminal fines, tax assessments, additional tax, and surcharges, shall in all cases be deemed excluded obligations not subject to transfer) shall belong to the newly incorporated spin-off company if the underlying act or fact is exclusively or primarily related to the spun-off business division, and otherwise shall belong to the surviving splitting company. (8) The preceding paragraph shall apply mutatis mutandis to the attribution of claims or other rights (including public- or private-law contingent claims and any other claims) acquired after the spin-off effective date due to acts or facts occurring before the spin-off effective date, or claims or rights already acquired before the spin-off effective date but not reflected in the spin-off plan due to lack of awareness or other circumstances. (9) Notwithstanding the principles of allocation and attribution of obligations under the spin-off plan, if for any reason the surviving splitting company repays an obligation succeeded to by the newly incorporated spin-off company or otherwise obtains joint discharge through an outlay, the surviving splitting company may exercise a right of indemnity against the newly incorporated spin-off company, and vice versa. (10) Among the pre-spin-off rights and obligations, any right or obligation that should be transferred to the newly incorporated spin-off company but whose transfer is prohibited by the spin-off under law or by its nature shall remain with the surviving splitting company; the surviving splitting company shall use its best efforts to ensure such transfer can occur even after completion of the spin-off, taking all necessary measures so that the same legal and economic effects as if the transfer had occurred arise between the companies.

2. Purpose of the spin-off (1) Through this spin-off, the newly incorporated spin-off company and the surviving splitting company will each establish and operate management strategies suited to the characteristics of their respective businesses, enhancing business specialization and strengthening external competitiveness. The surviving splitting company will identify and invest in new growth drivers and new businesses with high synergy with its existing business to respond swiftly to changes in market conditions, while enabling the newly incorporated spin-off company to concentrate investment on its core business, ultimately enhancing corporate and shareholder value. (2) The newly incorporated spin-off company will seek to enhance global competitiveness and pursue sustained growth in the spun-off business division, while the surviving splitting company will review various measures to strengthen its core competitiveness and enhance corporate value.

3. Material effects and impact of the spin-off This spin-off will be carried out as a simple physical (split-off) spin-off pursuant to Articles 530-2 through 530-12 of the Commercial Act. Accordingly, there will be no change in the number of shares held or the equity ratio of the splitting company's largest shareholder before and after this spin-off.

4. Spin-off ratio Since this is a simple physical spin-off in which the splitting company is allotted 100% of the shares issued by the newly incorporated spin-off company, a spin-off ratio is not calculated.

5. Details of business and property to be transferred by the spin-off (1) In principle, the splitting company will transfer to the newly incorporated spin-off company all active and passive property, and other rights, obligations and factual relationships of economic value (including permits/licenses, employment relationships, contractual relationships, litigation, etc.; the "property to be transferred") belonging to the spun-off business division, as provided in the spin-off plan. However, rights or obligations belonging to the spun-off business division whose transfer is prohibited by law or by their nature shall remain with the surviving splitting company, and where transfer to the newly incorporated spin-off company is necessary, the surviving splitting company will use its best efforts to ensure such transfer occurs even after the spin-off is completed. (2) The list and value of the property to be transferred shall, in principle, be as stated in Attachment 1 (Spin-off Statement of Financial Position) and Attachment 2 (List of Property to be Succeeded) of the spin-off plan, prepared based on the splitting company's statement of financial position and property list as of December 31, 2025; however, if changes in assets or liabilities occur before the spin-off effective date, or if assets or liabilities omitted or incorrectly stated are discovered, or if their value otherwise changes, these may be corrected or added. (3) The final value of each item of the assets and liabilities to be transferred shall be finally confirmed based on an appraisal by a reputable appraisal corporation or review by a certified public accountant. (4) Patents, utility models, trademarks, designs and other intellectual property rights held by the splitting company domestically or abroad before the spin-off effective date shall belong to the newly incorporated spin-off company if exclusively or primarily related to the spun-off business division, and otherwise to the surviving splitting company. The intellectual property rights belonging to the newly incorporated spin-off company are listed in Attachment 3 (List of Intellectual Property Rights to be Succeeded) of the spin-off plan. (5) Among litigation to which the splitting company is a party before the spin-off, litigation belonging to the newly incorporated spin-off company is listed in Attachment 4 (List of Litigation to be Succeeded); real estate belonging to the newly incorporated spin-off company is listed in Attachment 5 (List of Real Estate to be Succeeded); and investment securities belonging to the newly incorporated spin-off company are listed in Attachment 6 (List of Investment Securities to be Succeeded). (6) Permits, licenses, registrations, filings, etc. to which the splitting company is a party before the spin-off effective date shall belong to the newly incorporated spin-off company if exclusively or primarily related to the spun-off business division, or necessary for carrying on the spun-off business division on a stand-alone basis, and otherwise to the surviving splitting company. Those belonging to the newly incorporated spin-off company are listed in Attachment 7 (List of Permits and Licenses to be Succeeded). (7) Contractual relationships arising from the spun-off business division (including those related to the property to be transferred), and mortgages, pledges, etc. established to secure the rights and obligations thereunder, shall belong to the newly incorporated spin-off company. However, (i) where a contract to which the splitting company is a party relates to both the spun-off business division and other business divisions and cannot be separated, it shall remain with the surviving splitting company, and (ii) where relevant laws or procedures make it impossible for the newly incorporated spin-off company to succeed to the contractual status of a party, the surviving splitting company shall continue to perform the contract while the economic effects accrue to the newly incorporated spin-off company through mutual settlement. (8) For assets among the property to be transferred that are commonly related to or used by other business divisions of the splitting company, such assets shall be deemed property to be transferred only to the extent primarily used by the spun-off business division. The splitting company shall transfer the relevant portion to the newly incorporated spin-off company and take separation measures for the remaining portion so that the surviving splitting company may continue to use it for its other business divisions without adversely affecting the spun-off business (temporary and incidental effects naturally accompanying such separation are not considered adverse). Where certain property cannot be transferred due to legal reasons or third-party contracts, the surviving splitting company and the newly incorporated spin-off company shall determine the scope and period of use, cost-sharing, and other conditions through a separate service agreement or mutual agreement (for clarity, costs such as software usage fees that the newly incorporated spin-off company would otherwise have borne shall be borne by the newly incorporated spin-off company). The surviving splitting company shall otherwise provide necessary cooperation, including entering into related contracts, so that upon its establishment the newly incorporated spin-off company can carry on business as the spun-off business division did before the spin-off.

6. Surviving company after the spin-off Company name: Hyundai Mobis Co., Ltd. Post-spin-off financial details (KRW), as of December 31, 2025: Total assets 38,371,483,387,504; Total liabilities 7,764,357,045,115; Total equity 30,607,126,342,389; Capital stock 491,096,605,000 Surviving business division's most recent fiscal year revenue (KRW): 61,118,127,069,924 Main business: Manufacture and sale of automotive parts, etc. Whether listing will be maintained after the spin-off: Yes

7. Newly incorporated spin-off company Company name: Hyundai Mobis Lamp Co., Ltd. (tentative name) Financial details at incorporation (KRW), as of December 31, 2025: Total assets 541,529,971,210; Total liabilities 165,516,488,327; Total equity 376,013,482,883; Capital stock 3,760,130,000 Newly incorporated business division's most recent fiscal year revenue (KRW): 1,022,010,642,156 Main business: Production and supply of automotive lamp components Whether a re-listing application will be filed: No

8. Matters concerning capital reduction Capital reduction ratio (%): - Old share certificate submission period: Start -; End - Expected trading suspension period: Start -; End - New share allotment conditions: Not applicable Whether allotment is proportional to shares held, and reason: - New share allotment record date: - Expected date of delivery of new share certificates: - Expected listing date of new shares: -

9. Spin-off schedule Board resolution date: September 30, 2026; Independent (outside) director attendance: Present (persons) 4; Absent (persons) -; Auditor (audit committee member who is not an independent (outside) director) attendance: - Shareholder record date: October 15, 2026 Shareholder register closure period: Start -; End - Period for receiving notices of objection to the spin-off: Start November 9, 2026; End November 23, 2026 Expected shareholders' meeting date: November 24, 2026 Appraisal right exercise period: Start November 24, 2026; End December 14, 2026 Creditor objection period: Start November 25, 2026; End December 28, 2026 Spin-off effective date: April 1, 2027 Completion report meeting date: April 1, 2027 Expected spin-off registration date: April 1, 2027

10. Matters concerning appraisal rights Exercise requirements: Pursuant to Articles 530-2 through 530-12 of the Commercial Act and Article 165-5 of the Financial Investment Services and Capital Markets Act ("Capital Markets Act") and Article 176-7, Paragraph 1, Item 2 of its Enforcement Decree, a shareholder recorded in the shareholder register as of the record date who objects to the board resolution and notifies the company in writing by the day before the shareholders' meeting resolution date may, within 20 days from that resolution date, submit a written request specifying the type and number of shares and demand that the company purchase them (a request for only part of the shares held is also possible). Appraisal rights are granted only to shareholders who continue to hold the shares until the date of exercise, and a shareholder who gave prior written notice of objection but then voted in favor at the shareholders' meeting may not exercise the right. The splitting company, Hyundai Mobis Co., Ltd., is listed on the KOSPI market and must purchase the relevant shares within one month from the end of the share-purchase request period. Expected purchase price: KRW 408,394 per share Exercise procedure, method, period, and place: (1) Notice of objection: A shareholder recorded in the company's shareholder register as of the record date must notify the company in writing of objection to the spin-off board resolution before the shareholders' meeting. A shareholder whose shares are electronically registered in a customer account must apply to the account management institution to indicate objection no later than 3 business days before the end of the objection notice period. (2) Exercise method: A shareholder who gave the above notice of objection may demand purchase by submitting, within 20 days from the shareholders' meeting resolution date, a written document specifying the type and number of shares. (3) Exercise period: November 24, 2026 to December 14, 2026 (4) Exercise location: a. For shareholders recorded in the shareholder register: Hyundai Mobis Co., Ltd., 203 Teheran-ro, Gangnam-gu (Yeoksam-dong), Seoul; b. For beneficial shareholders whose shares are held in custody with a securities company: the relevant securities company Expected payment timing and method: (1) Timing: within one month from the end of the share-purchase request period; (2) Method: cash payment or transfer to the shareholder's registered account. Content related to restriction of appraisal rights: Pursuant to Article 165-5, Paragraph 1 of the Capital Markets Act and Article 176-7, Paragraph 2 of its Enforcement Decree, appraisal rights are granted only to a shareholder who can prove the shares were acquired before the board resolution was disclosed, or who can prove that by the business day following disclosure (i) a sale and purchase contract for the shares was concluded, (ii) a loan-for-consumption contract for the shares was terminated, or (iii) another legal act concerning the shares occurred, and who continues to hold such shares until the date of exercise; shares sold and reacquired within such period lose eligibility, and an exercised appraisal right cannot be withdrawn. Effect on the contract: This spin-off is a simple physical spin-off under Articles 530-2 through 530-12 of the Commercial Act, and dissenting shareholders are granted appraisal rights pursuant to Article 165-5 of the Capital Markets Act. If the aggregate purchase price of shares for which appraisal rights are exercised in opposition to this spin-off exceeds KRW 230 billion (calculated based on the expected purchase price presented by the splitting company), the splitting company may, by board resolution, halt the spin-off and withdraw the decision to proceed. If such a withdrawal resolution is made, the procedures for exercising appraisal rights will also be discontinued, and the splitting company will not be obligated to pay the share purchase price arising from exercised appraisal rights.

11. Whether a put option or similar contract has been concluded: No Contract details: -

12. Whether subject to securities registration statement filing: No If exempted from filing, the reason: Simple physical spin-off * Independent director for listed companies; outside director for non-listed companies.

13. Future plans for corporate restructuring Following the board resolution dated September 30, 2026, the company plans to enter into a share purchase agreement with OPmobility SE (the "Buyer") to transfer (sell) to the Buyer the equity interest in the newly incorporated spin-off company to be established through this spin-off. (For details of the share purchase agreement, see "(9) Matters Concerning the Share Purchase Agreement" under "16. Other Matters Material to Investment Decisions" below.) Accordingly, among the splitting company's domestic subsidiaries, the equity interest in the subsidiary engaged in automotive lamp manufacturing, which belongs to the spun-off business division, is expected to be transferred to the newly incorporated spin-off company. The automotive lamp business conducted by the splitting company's overseas subsidiaries (including the portion conducted by newly established companies formed through procedures equivalent to a spin-off under local laws) is not included in this spin-off; the surviving splitting company will continue to hold such equity interests and sell them separately to the Buyer apart from this spin-off. The newly incorporated spin-off company, combined with the capabilities of the Buyer, a global automotive parts specialist, will seek to enhance the global competitiveness of the spun-off business division and pursue sustained growth; the surviving splitting company will review various measures, through this equity sale, to restructure its existing business, strengthen its future core competitiveness, and enhance corporate and shareholder value. Other than the above, the company currently has no other restructuring plans, but detailed plans may change depending on management plans and market conditions, and related disclosures will be made once finalized.

14. For a physical spin-off, review of the rationale for pursuing a physical spin-off Through this physical spin-off, the company will separate the automotive lamp business division, enabling it to secure sustainable business competitiveness through independent management strategy formulation and operation suited to its own business characteristics. Following this physical spin-off, the splitting company will concentrate on its remaining business divisions, focusing on business growth, strengthening competitiveness, and maximizing management efficiency. The surviving splitting company intends to pursue the transfer (sale) of the equity interest in the newly incorporated spin-off company to the Buyer, and plans to use the funds raised through this equity sale to strengthen its core competitiveness and enhance corporate value.

15. For a physical spin-off, shareholder protection measures The splitting company and the newly incorporated spin-off company will each concentrate their capabilities on their respective businesses and secure sustainable business competitiveness through independent and efficient management. After completion of this spin-off, the company plans to sell its entire equity interest in the newly incorporated spin-off company to the Buyer, believing this sale will strengthen the splitting company's competitiveness and, on that basis, enhance corporate and shareholder value. Shareholders who oppose this spin-off may exercise appraisal rights pursuant to Article 176-7, Paragraph 1, Item 2 of the Enforcement Decree of the Capital Markets Act. For details, see "10. Matters Concerning Appraisal Rights" above.

16. Other matters material to investment decisions (1) Amendment and modification of the spin-off plan The spin-off plan may be partially amended or modified by the board of directors or by the CEO under delegation from the board before the shareholders' meeting, if, before the spin-off effective date, changes occur in the assets and liabilities (or contractual relationships) of the spun-off business division due to business or financial changes, implementation of business plans, the splitting company's plans and circumstances, consultations with relevant authorities, changes in relevant laws or accounting standards, or significant external influences, or if assets or liabilities omitted or incorrectly stated are discovered, or if their value otherwise changes; it may also be changed during the shareholders' meeting approval process. In addition, once approval is obtained at the extraordinary shareholders' meeting, until the day before the spin-off registration date, the trade names, head office addresses, and notice methods of the surviving splitting company and the newly incorporated spin-off company, the spin-off schedule, the remaining or to-be-transferred property and its value, the pre- and post-spin-off capital structure, the total number of shares to be issued by the newly incorporated spin-off company, the remuneration limits for directors and auditors for the first fiscal year, the articles of incorporation, and matters stated in each attachment may be amended or modified by the board of directors or by the CEO under delegation from the board without further shareholders' meeting approval, where (i) changes occur in assets/liabilities due to implementation of business or financial activities/plans, changes in relevant laws or accounting standards, etc., or omissions/errors are found, (ii) such amendment or modification is reasonably necessary and does not disadvantage either company, (iii) it does not impair the fundamental identity of the plan, or (iv) the spin-off plan itself contemplates that such change is permissible. (2) Matters requiring hand-over between the companies Matters requiring hand-over between the surviving splitting company and the newly incorporated spin-off company in connection with implementation of the spin-off plan (including documents, data and other materials and factual relationships related to the spun-off business division) shall be governed by separate agreement between the two companies. (3) Appraisal rights of dissenting shareholders This spin-off is a simple physical spin-off under Articles 530-2 through 530-12 of the Commercial Act, and appraisal rights are recognized pursuant to Article 165-5 of the Capital Markets Act. The "expected purchase price" is the arithmetic mean (rounded up to the nearest won) of the prices calculated by the following methods set out in Article 176-7, Paragraph 3, Item 1 of the Enforcement Decree of the Capital Markets Act: a. The weighted arithmetic average price, weighted by trading volume from actual transactions, of the daily closing prices published on the securities market over the two months preceding the day before the board resolution date. b. The weighted arithmetic average price, weighted by trading volume, of the daily closing prices over the one month preceding the day before the board resolution date. c. The weighted arithmetic average price, weighted by trading volume, of the daily closing prices over the one week preceding the day before the board resolution date. (4) Succession of employees and severance pay The newly incorporated spin-off company shall succeed to the employment of, and all rights and obligations relating to (including status under employment contracts, work rules, years of service, and other working conditions), the employees listed in Attachment 8 (List of Employees to be Succeeded) who, as of the spin-off effective date, exclusively or primarily perform duties relating to the spun-off business. Other specific matters shall be determined and handled by the splitting company's board of directors or by the CEO under delegation from the board. (5) Transfer of personal information The newly incorporated spin-off company shall receive all personal information related to the spun-off business division, held as of the spin-off effective date, under the Personal Information Protection Act and other related laws, and the splitting company shall take the procedures required under relevant laws within the required deadlines, including notice regarding the transfer of personal information due to this spin-off. (6) Expected appraisal right purchase price Expected common-share appraisal right purchase price: KRW 408,394 per share. Calculation details (daily closing price and trading volume): Date 2026-09-29: closing price 367,000; volume 222,073; closing price x volume 81,500,791,000 Date 2026-09-28: closing price 373,000; volume 203,762; value 76,003,226,000 Date 2026-09-23: closing price 367,500; volume 182,601; value 67,105,867,500 Date 2026-09-22: closing price 372,500; volume 262,404; value 97,745,490,000 Date 2026-09-21: closing price 373,000; volume 205,373; value 76,604,129,000 Date 2026-09-18: closing price 379,000; volume 332,044; value 125,844,676,000 Date 2026-09-17: closing price 381,000; volume 260,931; value 99,414,711,000 Date 2026-09-16: closing price 383,000; volume 293,547; value 112,428,501,000 Date 2026-09-15: closing price 394,500; volume 238,631; value 94,139,929,500 Date 2026-09-14: closing price 400,000; volume 188,471; value 75,388,400,000 Date 2026-09-11: closing price 415,500; volume 227,443; value 94,502,566,500 Date 2026-09-10: closing price 415,500; volume 379,924; value 157,858,422,000 Date 2026-09-09: closing price 417,500; volume 210,500; value 87,883,750,000 Date 2026-09-08: closing price 415,000; volume 289,488; value 120,137,520,000 Date 2026-09-07: closing price 432,000; volume 212,732; value 91,900,224,000 Date 2026-09-04: closing price 422,000; volume 228,188; value 96,295,336,000 Date 2026-09-03: closing price 423,500; volume 354,549; value 150,151,501,500 Date 2026-09-02: closing price 415,500; volume 463,596; value 192,624,138,000 Date 2026-09-01: closing price 443,500; volume 287,607; value 127,553,704,500 Date 2026-08-31: closing price 453,500; volume 490,499; value 222,441,296,500 Date 2026-08-28: closing price 450,500; volume 327,014; value 147,319,807,000 Date 2026-08-27: closing price 451,500; volume 680,279; value 307,145,968,500 Date 2026-08-26: closing price 464,000; volume 580,296; value 269,257,344,000 Date 2026-08-25: closing price 498,000; volume 328,383; value 163,534,734,000 Date 2026-08-24: closing price 498,500; volume 182,771; value 91,111,343,500 Date 2026-08-21: closing price 496,000; volume 219,886; value 109,063,456,000 Date 2026-08-20: closing price 507,000; volume 224,249; value 113,694,243,000 Date 2026-08-19: closing price 509,000; volume 197,443; value 100,498,487,000 Date 2026-08-18: closing price 518,000; volume 326,189; value 168,965,902,000 Date 2026-08-14: closing price 547,000; volume 352,348; value 192,734,356,000 Date 2026-08-13: closing price 511,000; volume 300,816; value 153,716,976,000 Date 2026-08-12: closing price 498,500; volume 263,323; value 131,266,515,500 Date 2026-08-11: closing price 495,500; volume 157,950; value 78,264,225,000 Date 2026-08-10: closing price 505,000; volume 192,945; value 97,437,225,000 Date 2026-08-07: closing price 496,500; volume 198,850; value 98,729,025,000 Date 2026-08-06: closing price 508,000; volume 248,416; value 126,195,328,000 Date 2026-08-05: closing price 503,000; volume 270,626; value 136,124,878,000 Date 2026-08-04: closing price 481,500; volume 270,991; value 130,482,166,500 Date 2026-08-03: closing price 493,500; volume 328,332; value 162,031,842,000 Date 2026-07-31: closing price 476,000; volume 357,337; value 170,092,412,000 Date 2026-07-30: closing price 445,000; volume 379,620; value 168,930,900,000 A. 2-month weighted arithmetic average price: 449,919 B. 1-month weighted arithmetic average price: 406,103 C. 1-week weighted arithmetic average price: 369,159 D. Arithmetic mean [(A+B+C)/3]: 408,394

(7) Other matters The spin-off completion report meeting and the inaugural general meeting may be replaced by board resolution and public notice; authority over any matters not specified in the spin-off plan shall be determined and executed by the CEO. (8) For other detailed matters, please refer to the attached spin-off plan document. (9) Matters concerning the share purchase agreement On September 30, 2026, the company obtained board approval for the matter of selling the equity interest in the newly incorporated spin-off company to the Buyer. Pursuant to the share purchase agreement to be executed following that board approval, the company will sell to the Buyer the equity interest in the newly incorporated spin-off company (including the equity interest in the domestic automotive-lamp-related subsidiary included in the spun-off business division and transferred to the newly incorporated spin-off company); the equity interests related to the automotive lamp business conducted by the company's overseas subsidiaries (including equity interests in newly established companies formed through procedures equivalent to a spin-off under local laws) will also be sold to the Buyer together with the above. This disclosure serves as the confirmed disclosure in lieu of a response to the Korea Exchange's December 26, 2025 request for confirmation disclosure regarding "Hyundai Mobis Co., Ltd. - Report Related to Pursuit of Sale of Lamp Business Division to France's OPmobility," and concludes the company's responses regarding the unconfirmed disclosure. Related disclosures: - 2025.12.26 Request for confirmation disclosure (rumor or press report) - 2025.12.26 Response to request for confirmation disclosure (rumor or press report) (unconfirmed) - 2026.1.23 Response to request for confirmation disclosure (rumor or press report) (unconfirmed) - 2026.1.27 Response to request for confirmation disclosure (rumor or press report) (unconfirmed) - 2026.4.24 Response to request for confirmation disclosure (rumor or press report) (unconfirmed)