XML 83 R73.htm IDEA: XBRL DOCUMENT
v3.26.1

Share Capital and Capital Surplus (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
TextBlock 1 [Abstract] |
Summary of Share Capital |
(a) | Share capital as of December 31, 2024 and 2025 are as follows:
(Share, in Won) |  | 2024 |  |  | 2025 |
Authorized shares |  |  | 200,000,000 |  |  |  | 200,000,000 |
Par value |  | ￦ | 5,000 |  |  |  | 5,000 |
Issued shares(*1,2) |  |  | 82,624,377 |  |  |  | 80,932,952 |
Shared capital(*3) |  | ￦ | 482,403,125,000 |  |  |  | 482,403,125,000 |
(*1) | As of December 31, 2025, total number of American Depository Receipts (ADRs) outstanding in overseas stock market amounts to 9,159,020 and such ADRs are equivalent to 2,289,755 shares of common stock.
(*2) | Pursuant to the resolution of the Board of Directors’ meeting on February 19, 2025, the controlling company decided to retire 1,691,425 shares using distributable profits, and it was completed on March 31, 2025. As a result, as of December 31, 2025, the the controlling company’s total number of issued shares has decreased.
(*3) | As of December 31, 2025, the difference between the ending balance of common stock and the aggregate par value of issued common stock is ￦ 77,738 million due to retirement of 15,547,673 treasury stocks.
Changes in Issued Common Stock |
(b) | Changes in issued common stock for the years ended December 31, 2024 and 2025 are as follows:
(share) |  | 2024 |  |  | 2025 |
|  | Issued shares |  |  | Treasury shares |  |  | Number of outstanding shares |  |  | Issued shares |  |  | Treasury shares |  |  | Number of outstanding shares |
Beginning |  |  | 84,571,230 |  |  |  | (8,695,023 | ) |  |  | 75,876,207 |  |  |  | 82,624,377 |  |  |  | (7,003,598 | ) |  |  | 75,620,779 |
Acquisition of treasury shares |  |  | — |  |  |  | (255,428 | ) |  |  | (255,428 | ) |  |  | — |  |  |  | — |  |  |  | — |
Retirement of treasury shares |  |  | (1,946,853 | ) |  |  | 1,946,853 |  |  |  | — |  |  |  | (1,691,425 | ) |  |  | 1,691,425 |  |  |  | — |
Ending |  |  | 82,624,377 |  |  |  | (7,003,598 | ) |  |  | 75,620,779 |  |  |  | 80,932,952 |  |  |  | (5,312,173 | ) |  |  | 75,620,779 |
Summary of Capital Surplus |
(c) | Capital surplus as of December 31, 2024 and 2025 are as follows:
(in millions of Won) |  | 2024 |  |  | 2025 |
Share premium |  | ￦ | 463,825 |  |  |  | 463,825 |
Gain on disposal of treasury shares |  |  | 808,994 |  |  |  | 808,994 |
Other capital surplus |  |  | 385,531 |  |  |  | 421,753 |
|  | ￦ | 1,658,350 |  |  |  | 1,694,572 |

X
- Definition The disclosure of classes of share capital. [Refer: Classes of share capital [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 160 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_160_a&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph B10 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B10_a&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 79 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_79_a&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_DisclosureOfClassesOfShareCapitalExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of capital surplus. + References No definition available. + Details
Name: | pkx_DisclosureOfCapitalSurplusExplanatory
Namespace Prefix: | pkx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of reconciliation of number of shares outstanding. + References No definition available. + Details
Name: | pkx_DisclosureOfReconciliationOfNumberOfSharesOutstandingExplanatory
Namespace Prefix: | pkx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition TextBlock 1. + References No definition available. + Details
Name: | pkx_Textblock1Abstract
Namespace Prefix: | pkx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration