# EDGAR Filing Document

**Accession Number:** 0000889132
**File Stem:** 0001193125-25-205606
**Filing Date:** 2025-9
**Character Count:** 6779
**Document Hash:** 21f92a62f4276ff184086af2ab034f30
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-205606.hdr.sgml**: 20250917

**ACCESSION NUMBER**: 0001193125-25-205606

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250917

**FILED AS OF DATE**: 20250917

**DATE AS OF CHANGE**: 20250917

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** POSCO HOLDINGS INC.
- **CENTRAL INDEX KEY:** 0000889132
- **STANDARD INDUSTRIAL CLASSIFICATION:** STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13368
- **FILM NUMBER:** 251318990

**BUSINESS ADDRESS:**
- **STREET 1:** POSCO CENTER
- **STREET 2:** 440 TEHERAN-RO
- **CITY:** GANGNAM-GU, SEOUL
- **STATE:** M5
- **ZIP:** 06194
- **BUSINESS PHONE:** 02-3457-0114

**MAIL ADDRESS:**
- **STREET 1:** POSCO CENTER
- **STREET 2:** 440 TEHERAN-RO
- **CITY:** GANGNAM-GU, SEOUL
- **STATE:** M5
- **ZIP:** 06194

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** POSCO
- **DATE OF NAME CHANGE:** 20020517

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** POHANG IRON & STEEL CO LTD
- **DATE OF NAME CHANGE:** 19930607

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**Form 6-K** 

**REPORT OF FOREIGN PRIVATE ISSUER** 

**PURSUANT TO RULE 13a-16 OR 15D-16** 

**UNDER THE SECURITIES EXCHANGE ACT OF 1934** 

**For the month of September, 2025** 

**Commission File Number: 1-13368** 

## POSCO HOLDINGS INC.
**(Translation of registrant's name into English)** 

**POSCO Center, 440 Teheran-ro, Gangnam-gu, Seoul, Korea, 06194** 

**(Address of principal executive offices)** 

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

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**<u>Notice of Inclusion of Subsidiary in Holding Company</u>**

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| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;1. Details of subsidiary | A. Company name | A. Company name | POSCO SAFETY SOLUTION |
| &nbsp;&nbsp;&nbsp;1. Details of subsidiary | B. Representative | B. Representative | Yu Jaehong |
| &nbsp;&nbsp;&nbsp;1. Details of subsidiary | C. Main business | C. Main business | Occupational Safety and Health Advisory Services for Business Sites |
| &nbsp;&nbsp;&nbsp;1. Details of subsidiary | D. Financial status of the latest fiscal year (KRW mn) | Total assets |  |
| &nbsp;&nbsp;&nbsp;1. Details of subsidiary | D. Financial status of the latest fiscal year (KRW mn) | Total liabilities |  |
| &nbsp;&nbsp;&nbsp;1. Details of subsidiary | D. Financial status of the latest fiscal year (KRW mn) | Total shareholders' equity |  |
| &nbsp;&nbsp;&nbsp;1. Details of subsidiary | D. Financial status of the latest fiscal year (KRW mn) | Capital stock |  |
| &nbsp;&nbsp;&nbsp;2. Shareholding ratio of subsidiary | Before inclusion | Shares held (shrs.) |  |
| &nbsp;&nbsp;&nbsp;2. Shareholding ratio of subsidiary | Before inclusion | Shareholding ratio (%) |  |
| &nbsp;&nbsp;&nbsp;2. Shareholding ratio of subsidiary | After inclusion | Shares held (shrs.) | 926000 |
| &nbsp;&nbsp;&nbsp;2. Shareholding ratio of subsidiary | After inclusion | Shareholding ratio (%) | 100.0 |
| &nbsp;&nbsp;&nbsp;3. Percentage of value of shares held to total assets | Before inclusion | Value of shares held (KRW million) |  |
| &nbsp;&nbsp;&nbsp;3. Percentage of value of shares held to total assets | Before inclusion | Percentage in total assets (%) |  |
| &nbsp;&nbsp;&nbsp;3. Percentage of value of shares held to total assets | After inclusion | Value of shares held (KRW million) | 4630 |
| &nbsp;&nbsp;&nbsp;3. Percentage of value of shares held to total assets | After inclusion | Percentage in total assets (%) | 0.0 |
| &nbsp;&nbsp;&nbsp;4. Total number of subsidiaries | Before inclusion | Before inclusion | 18 |
| &nbsp;&nbsp;&nbsp;4. Total number of subsidiaries | After inclusion | After inclusion | 19 |
| &nbsp;&nbsp;&nbsp;5. Reasons for inclusion | &nbsp;&nbsp;&nbsp;5. Reasons for inclusion | &nbsp;&nbsp;&nbsp;5. Reasons for inclusion | Corporation establishment |
| &nbsp;&nbsp;&nbsp;6. Date of inclusion | &nbsp;&nbsp;&nbsp;6. Date of inclusion | &nbsp;&nbsp;&nbsp;6. Date of inclusion | September 17, 2025 |
| &nbsp;&nbsp;&nbsp;7. Date of board resolution (decision date) | &nbsp;&nbsp;&nbsp;7. Date of board resolution (decision date) | &nbsp;&nbsp;&nbsp;7. Date of board resolution (decision date) | September 17, 2025 |
| &nbsp;&nbsp;&nbsp;8. Other matters to be factored into investment decisions | &nbsp;&nbsp;&nbsp;8. Other matters to be factored into investment decisions | &nbsp;&nbsp;&nbsp;8. Other matters to be factored into investment decisions | • POSCO SAFETY SOLUTION is a newly established subsidiary of POSCO HOLDINGS and will report the incorporation of affiliate in accordance with Article 30(1) of the Monopoly Regulation and Fair Trade Act. |

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| | |
|:---|:---|
|  | • The total number of 'shares held' after the inclusion under '2. Equity ratio in the subsidiary' is 926,000 shares, which represents 100.0% of the total number of shares (926,000 shares) issued by POSCO SAFETY SOLUTION upon its incorporation that POSCO HOLDINGS is acquiring in the form of cash contribution.<br>• The post-inclusion 'Value of shares held (KRW mn)' under '3. Percentage of value of shares held to total assets' is the equity value of 926,000 shares, which represents 100.0% of total issued shares. The post-inclusion 'Total asset ratio (%)' is the ratio of the equity valued against the total assets recorded in the separate financial statements of POSCO HOLDINGS in the FY2024 Business Report.<br>• Above '6.date of inclusion' refers to the share transaction consolidation date.<br>• Above '7. date of Board resolution (decision date)' is based on the date of the Founders' General Meeting of POSCO SAFETY SOLUTION.<br>• POSCO SAFETY SOLUTION is a business that offers advisory services on occupational safety and health for business sites. |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br> ![LOGO](g85092dsp03.jpg) Related disclosure |  |

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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| | | |
|:---|:---|:---|
|  |  | <u>POSCO HOLDINGS INC.</u> |
|  |  | (Registrant) |
| Date: September 17, 2025 | By | /s/ Han, Young-Ah |
|  |  | (Signature) |
|  |  | Name: Han, Young-Ah |
|  |  | Title: Senior Vice President |

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