Share buyback.

Material Event Report (Treasury Stock Acquisition Decision)

6.3 Bit Computer Co., Ltd. Material Event Report / Exchange Reporting Obligation Matter Financial Services Commission / Korea Exchange

Date: September 17, 2026

Company Name: Bit Computer Co., Ltd. Representative Directors: Cho Hyun-jeong, Jeon Jin-ok Headquarters: 33 Seocho-daero 74-gil, Seocho-gu, Seoul (Seocho-dong) Telephone: 02-3486-1234 Website: http://www.bit.kr

Document Preparer: Director Yun Jung-gu, Telephone: 02-3486-1234

**Treasury Stock Acquisition Decision**

1. Planned Acquisition Shares (units) - Common Stock: 263,000 - Other Stock: -

2. Planned Acquisition Amount (KRW) - Common Stock: 1,000,715,000 - Other Stock: -

3. Planned Acquisition Period - Start Date: September 18, 2026 - End Date: December 8, 2026

4. Planned Holding Period - Start Date: - - End Date: -

5. Acquisition Purpose Stock price stabilization and enhancement of shareholder value

6. Acquisition Method Direct acquisition through KOSDAQ market

7. Commissioned Investment Broker IBK Investment & Securities Co., Ltd.

8. Treasury Stock Holdings Prior to Acquisition - Within Distributable Earnings Range Acquisition: * Common Stock: 2,443,617 shares (14.70%) * Other Stock: (, %) - Other Acquisition: * Common Stock: 26,621 shares (0.16%) * Other Stock: (, %)

9. Acquisition Decision Date: September 17, 2026 - Independent (Outside) Directors* Attendance: 2 present, 0 absent - Auditor (Audit Committee Member who is not an Independent/Outside Director) Attendance: Present *For listed companies, independent directors; for unlisted companies, outside directors

10. Daily Purchase Order Quantity Limit - Common Stock: 26,300 shares - Other Stock: -

11. Other Matters for Investment Consideration

a. The planned acquisition amount in item 2 above is calculated by multiplying the closing price of 3,805 KRW on the day before the board resolution by the planned acquisition shares of 263,000 units. The actual acquisition quantity may vary within the planned acquisition amount limit depending on future stock price fluctuations.

b. The calculation basis for the daily purchase order quantity limit in item 10 above is determined as follows in accordance with Article 5-5, Paragraph 1, Subparagraph 2 of the Regulations on Issuance and Disclosure of Securities. [The larger of ① and ②] and the smaller of ③: 26,300 shares ① 10% of the acquisition notification shares: 26,300 shares ② 25% of the average daily trading volume for one month retroactively calculated from the day before the board resolution: 8,147 shares ③ 1% of total issued shares: 166,232 shares

c. The difference of 360 KRW between the planned acquisition amount of 1,001,622,500 KRW disclosed in the "Material Event Report (Treasury Stock Acquisition Decision)" announced on July 29, 2026, and the actual acquisition amount of 1,001,622,140 KRW in the "Treasury Stock Acquisition Result Report" announced on August 28, 2026, constitutes a stock price differential. Accordingly, a board resolution regarding treasury stock acquisition was made without waiting for one month to elapse after the acquisition period expired.

**Treasury Stock Acquisition Amount Limit**

| Item | Amount | |------|--------| | 1. Distributable Earnings Limit under Commercial Act as of End of Prior Fiscal Year | | | a. Net Assets | 73,270,575,665 | | b. Capital | 8,311,646,500 | | c. Sum of Capital Reserve and Earnings Reserve Accumulated through Prior Fiscal Year | 13,705,610,132 | | d. Unrealized Gains as Prescribed by Presidential Decree | 1,905,191,506 | | Subtotal (a-b-c-d) | 49,348,127,527 | | 2. Treasury Stock Acquisition Amount after End of Prior Fiscal Year | 6,001,822,645 | | 3. Dividend Amount Resolved at Regular Shareholders' Meeting after End of Prior Fiscal Year and Related Earnings Reserve | 1,120,215,749 | | 4. Quarterly/Interim Dividend Amount Resolved by Board of Directors after End of Prior Fiscal Year and Related Earnings Reserve |, | | 5. Trust Agreement Contract Amount |, | | 6. Acquisition Cost of Disposed Shares upon Treasury Stock Disposition after End of Prior Fiscal Year (Moving Average Method Applied) |, | | **Treasury Stock Acquisition Amount Limit (1-2-3-4-5+6)** | **42,226,089,133** |

※ The end of the prior fiscal year is the end of fiscal year 2025, and financial figures are based on separate financial statements (Unit: KRW).

**Treasury Stock Holdings Prior to Acquisition Decision**

(Unit: shares)

| Acquisition Method | Stock Type | Opening Balance | Change (+Acquisition, -Disposition, -Cancellation) | Closing Balance | Remarks | |---|---|---|---|---|---| | **Within Distributable Earnings Range Acquisition** | | | | | | | Direct Acquisition - On-Market Direct Acquisition | Common Stock | 1,206,703 | 1,236,914 |, |, | 2,443,617 |, | | | Other Stock |, |, |, |, |, |, | | Direct Acquisition - Off-Market Direct Acquisition | Common Stock |, |, |, |, |, |, | | | Other Stock |, |, |, |, |, |, | | Public Tender Offer | Common Stock |, |, |, |, |, |, | | | Other Stock |, |, |, |, |, |, | | Subtotal (a) | Common Stock | 1,206,703 | 1,236,914 |, |, | 2,443,617 |, | | | Other Stock |, |, |, |, |, |, | | **Acquisition by Trust Agreement** | | | | | | | Trustee Holdings | Common Stock |, |, |, |, |, |, | | | Other Stock |, |, |, |, |, |, | | Physical Holdings | Common Stock |, |, |, |, |, |, | | | Other Stock |, |, |, |, |, |, | | Subtotal (b) | Common Stock |, |, |, |, |, |, | | | Other Stock |, |, |, |, |, |, | | **Other Acquisition (c)** | Common Stock | 26,621 |, |, |, | 26,621 |, | | | Other Stock |, |, |, |, |, |, | | **Total (a+b+c)** | Common Stock | 1,233,324 | 1,236,914 |, |, | 2,470,238 |, | | | Other Stock |, |, |, |, |, |, |

※ The opening balance above is the holding quantity as of the start date of the fiscal year (January 1, 2026), and the closing balance is the holding quantity as of the filing document preparation date (September 17, 2026).