[Amended] Treasury share disposal: results report

What happened

Amendment Report

Amendment date: September 2, 2026

1. Disclosure document being amended: Treasury Share Disposal Results Report

2. Original filing date of the disclosure document being amended: September 2, 2021

3. Amended items:

Item: 2. Details of disposal report, c. Type and number of shares disposed [reason: recovery of exchange-target shares upon maturity redemption of exchangeable bonds] Before: Common shares, 83,671 shares After: Common shares, 0 shares (the Company had issued foreign-currency overseas exchangeable bonds using treasury shares as the exchange-target shares; upon maturity redemption of the exchangeable bonds, all exchange-target treasury shares were recovered)

Item: 3. Details of disposal [reason: recovery of exchange-target shares upon maturity redemption of exchangeable bonds], see "(Before 1)" and "(After 1)" tables below

Item: 4. Whether the disposal report matches the actual disposal [reason: recovery of exchange-target shares upon maturity redemption of exchangeable bonds], see "(Before 2)" and "(After 2)" tables below

Item: 5. Treasury share holdings after disposal [reason: recovery of exchange-target shares upon maturity redemption of exchangeable bonds], see "(Before 3)" and "(After 3)" tables below

(Before 1) (Unit: KRW, shares) Date: 2021.09.01; Type: Common shares; Order quantity: -; Quantity disposed: 83,671; Disposal price per share: 494,450; Total disposal value: 41,371,125,950; Brokerage firm handling the disposal: -; Financial investment firm's unique ID: - Total: Order quantity: -; Quantity disposed: 83,671; Disposal price per share: 494,450; Total disposal value: 41,371,125,950; Brokerage firm: -; Financial investment firm's unique ID: -

Note: The above disposal price is the exchange price of the exchangeable bonds, in KRW. - Please note that this treasury share disposal is recorded on the assumption that, in connection with the foreign-currency overseas exchangeable bonds issued by the Company on 2021.9.1, the total 83,671 treasury shares serving as the exchange-target shares for those bonds were requested for exchange on that same date. - The actual treasury share disposal will be finalized at the time the exchange right under the exchangeable bonds is exercised; the treasury shares concerned are currently held in deposit with the Korea Securities Depository. - For details of the issuance of the exchangeable bonds and the treasury share disposal decision, please refer to the Company's amended disclosures dated 2021.8.26, "Material Event Report (Decision to Issue Exchangeable Bonds)" and "Material Event Report (Decision on Treasury Share Disposal)."

(After 1) (Unit: KRW, shares) Date: 2021.09.01; Type: Common shares; Order quantity: -; Quantity disposed: 0; Disposal price per share: 414,343; Total disposal value: 0; Brokerage firm handling the disposal: -; Financial investment firm's unique ID: - Total: Order quantity: -; Quantity disposed: 0; Disposal price per share: 414,343; Total disposal value: 0; Brokerage firm: -; Financial investment firm's unique ID: -

Note 1) The above disposal price is the exchange price of the exchangeable bonds; the per-share disposal price is the exchange price after adjustment for cash dividends. Note 2) Upon maturity redemption of the exchangeable bonds, all 88,971 exchange-target treasury shares (increased from the original 83,671 shares due to an exchange-price adjustment for cash dividends) were recovered; there was no exchange request during the issuance period.

(Before 2) Shares planned for disposal (shares): Common shares: 83,671; Other shares: - Total shares disposed (shares): Common shares: 83,671; Other shares: - Match: Match Reason for any discrepancy: -

(After 2) Shares planned for disposal (shares): Common shares: 0; Other shares: - Total shares disposed (shares): Common shares: 0; Other shares: - Match: Match Reason for any discrepancy: - Note) Upon maturity redemption of the exchangeable bonds, all exchange-target treasury shares were recovered; there was no exchange request during the issuance period.

(Before 3) [As of 2024.09.02 (as stated in the filing)] (Unit: KRW million, shares, %) Type of shares: Common shares Holdings under Article 165-3 (A): Quantity: 6,919,927; Ratio: 8.38%; Total value: 1,532,334 Holdings under trust agreements, etc. per Article 165-3 (B): Quantity: -; Ratio: -; Contract amount: - Total (A+B): Quantity: 6,919,927; Ratio: 8.38%; Amount: 1,532,334 As stated in "3. Details of disposal" above, because the total 83,671 treasury shares serving as the exchange-target shares for the exchangeable bonds are treated as having been requested for exchange on the same date, this quantity is excluded from the treasury share holdings shown above after disposal.

(After 3) [As of 2026.09.02] (Unit: KRW million, shares, %) Type of shares: Common shares Holdings under Article 165-3 (A): Quantity: 3,620,748; Ratio: 4.57%; Total value: 801,771 Holdings under trust agreements, etc. per Article 165-3 (B): Quantity: -; Ratio: -; Contract amount: - Total (A+B): Quantity: 3,620,748; Ratio: 4.57%; Amount: 801,771 Note) Because the foreign-currency overseas exchangeable bonds issued under the Material Event Report dated 2021.8.26 were redeemed at maturity, the exchange-target treasury shares were fully recovered without any exchange request during the issuance period, and this quantity is included in the holdings shown above.

Treasury Share Disposal Results Report

To: The Governor of the Financial Supervisory Service Date: September 2, 2026 Company name: POSCO Holdings Inc. Representative director: President Lee Ju-tae Head office address: 6261 Donghaean-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do Phone: 054-220-0114 Website: http://www.posco-inc.com Preparer: (Title) Head of IR (Name) Han Yeong-a (Phone) 02-3457-0114

1. Name and address of the issuer: a. Name: POSCO Holdings Inc. b. Address: 6261 Donghaean-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do (Gwaedong-dong)

2. Details of disposal report: a. Filing date of the material event report: August 13, 2021 b. Disposal period: From 2021.09.01 to 2021.09.01 c. Type and number of shares disposed: Common shares, 0 shares (the Company had issued foreign-currency overseas exchangeable bonds using treasury shares as the exchange-target shares; upon maturity redemption of the exchangeable bonds, all exchange-target treasury shares were recovered)

3. Details of disposal (Unit: KRW, shares) Date: 2021.09.01; Type: Common shares; Order quantity: -; Quantity disposed: 0; Disposal price per share: 414,343; Total disposal value: 0; Brokerage firm handling the disposal: -; Financial investment firm's unique ID: - Total: Order quantity: -; Quantity disposed: 0; Disposal price per share: 414,343; Total disposal value: 0; Brokerage firm: -; Financial investment firm's unique ID: - Note 1) The above disposal price is the exchange price of the exchangeable bonds; the per-share disposal price is the exchange price after adjustment for cash dividends. Note 2) Upon maturity redemption of the exchangeable bonds, all 88,971 exchange-target treasury shares (increased from the original 83,671 shares due to an exchange-price adjustment for cash dividends) were recovered; there was no exchange request during the issuance period.

4. Whether the disposal report matches the actual disposal: Shares planned for disposal (shares): Common shares: 0; Other shares: - Total shares disposed (shares): Common shares: 0; Other shares: - Match: Match Reason for any discrepancy: - Note) Upon maturity redemption of the exchangeable bonds, all exchange-target treasury shares were recovered; there was no exchange request during the issuance period.

5. Treasury share holdings after disposal [As of 2026.09.02] (Unit: KRW million, shares, %) Type of shares: Common shares Holdings under Article 165-3 (A): Quantity: 3,620,748; Ratio: 4.57%; Total value: 801,771 Holdings under trust agreements, etc. per Article 165-3 (B): Quantity: -; Ratio: -; Contract amount: - Total (A+B): Quantity: 3,620,748; Ratio: 4.57%; Amount: 801,771 Note) Because the foreign-currency overseas exchangeable bonds issued under the Material Event Report dated 2021.8.26 were redeemed at maturity, the exchange-target treasury shares were fully recovered without any exchange request during the issuance period, and this quantity is included in the holdings shown above.