Completion report on merger, etc. (merger)

What happened

Completion Report on Merger, etc. (Merger)

To: The Governor of the Financial Supervisory Service Date: September 2, 2026 Company name: S-Traffic Co., Ltd. Representative director: Mun Chan-jong Head office address: 56 Geumto-ro 80beon-gil, C-dong (Widen Tower), Geumto-dong, Sujeong-gu, Seongnam-si, Gyeonggi-do Phone: 031-739-9500 Website: http://www.straffic.co.kr Preparer: (Title) Executive Vice President (Name) Lee Jang-han (Phone) 031-739-9533

I. Schedule Board resolution to merge: 2026-06-30 Filing of material event report: 2026-06-30 Public notice designating the record date for determining shareholders: 2026-06-30 Merger agreement date: 2026-07-01 Record date for determining shareholders: 2026-07-15 Small-scale merger notice date: 2026-07-15 Period for receiving notices of objection to the merger: start 2026-07-15, end 2026-07-29 Board resolution date approving the merger: 2026-07-30 Public notice for creditor objections: 2026-07-31 Period for creditor objections: start 2026-07-31, end 2026-08-31 Effective date of merger: 2026-09-01 Board resolution date for the merger completion report: 2026-09-01 Public notice of the merger completion report: 2026-09-01 Expected merger registration date: 2026-09-02

Note 1) For the surviving company, S-Traffic Co., Ltd., because this merger qualifies as a small-scale merger, a shareholders' meeting to approve the merger is replaced by a board resolution. Note 2) Because S-Traffic Co., Ltd., the surviving company, is proceeding under the small-scale merger procedure, appraisal rights (share purchase demand rights) are not recognized. Note 3) The record date for determining shareholders is the record date for the purpose of expressing objection to the small-scale merger. Note 4) S-Traffic Co., Ltd.'s shareholders' meeting for the merger completion report is replaced, via board resolution, by a website notice as provided in the Articles of Incorporation. Note 5) Because this merger does not involve issuing merger-related new shares for a wholly (100%) owned subsidiary, no new shares will be delivered or listed. Note 6) The expected merger registration date above is based on the date the registration application is received.

II. Changes in Equity Holdings of Major Shareholders, etc. S-Traffic Co., Ltd. holds 100% of the equity of ST Telecommunications Co., Ltd., and this merger is a no-new-share-issuance merger method. Accordingly, no new shares are issued as a result of this merger, and there is no change in the equity holdings of major shareholders, etc.

III. Exercise of Appraisal Rights (Share Purchase Demand Rights) Because this merger is conducted as a small-scale merger under Article 527-3 of the Commercial Act, appraisal rights are not granted. In addition, notices of objection to the merger were accepted from July 15, 2026 to July 29, 2026 under Article 527-3 of the Commercial Act; the total number of shareholders who gave notice of objection to the merger was 0, and the total number of shares for which objection was expressed was 0 shares (0.00% of total shares issued).

IV. Matters Concerning Creditor Protection The surviving company, S-Traffic Co., Ltd., and the dissolving company, ST Telecommunications Co., Ltd., each issued a public notice for creditor objections on July 31, 2026, and as of the expiration of the creditor objection period on August 31, 2026, no creditor had raised an objection. In addition, no decision has been made to repay any claim or provide substantial collateral in connection with this matter.

V. Status of Related Litigation As of the filing date of this report, no lawsuit has been filed that could affect the validity of this merger, etc.

VI. Matters Concerning New Share Allotment, etc. Because this merger is being carried out with respect to a wholly (100%) owned subsidiary on a no-new-share-issuance basis at a merger ratio of 1 : 0.0000000, no new shares will be issued.

VII. Summary Financial Information Before and After the [Merger, etc.]

Before the merger: S-Traffic Co., Ltd., Current assets: 55,667,420,525; Non-current assets: 90,761,802,658; Total assets: 146,429,223,183; Current liabilities: 62,266,966,744; Non-current liabilities: 2,014,757,266; Total liabilities: 64,281,724,010; Capital stock: 13,904,924,000; Capital surplus: 42,264,089,637; Capital adjustments: (1,854,414,646); Retained earnings (accumulated deficit): 27,832,900,182; Accumulated other comprehensive income: -; Total equity: 82,147,499,173; Total liabilities and equity: 146,429,223,183

ST Telecommunications Co., Ltd., Current assets: 2,710,021,953; Non-current assets: 1,776,211,163; Total assets: 4,486,233,116; Current liabilities: 1,751,405,658; Non-current liabilities: 62,434,943; Total liabilities: 1,813,840,601; Capital stock: 3,500,000,000; Capital surplus: 2,922,182,969; Capital adjustments: -; Retained earnings (accumulated deficit): (3,749,790,454); Accumulated other comprehensive income: -; Total equity: 2,672,392,515; Total liabilities and equity: 4,486,233,116

After the merger: S-Traffic Co., Ltd., Current assets: 56,221,510,757; Non-current assets: 92,538,013,821; Total assets: 148,759,524,578; Current liabilities: 62,115,111,518; Non-current liabilities: 2,077,192,209; Total liabilities: 64,192,303,727; Capital stock: 17,404,924,000; Capital surplus: 45,186,272,606; Capital adjustments: (1,854,414,646); Retained earnings (accumulated deficit): 23,830,438,891; Accumulated other comprehensive income: -; Total equity: 84,567,220,851; Total liabilities and equity: 148,759,524,578

Note 1) The above summary financial information is prepared based on the separate (non-consolidated) statement of financial position as of June 30, 2026 (with intercompany transaction amounts eliminated per consolidated-statement preparation standards), and may differ from the statement of financial position as of the merger effective date, September 1, 2026. Note 2) The above post-merger financial statements have not been audited or reviewed by an external auditor and may change depending on the results of the external auditor's audit or review.