# EDGAR Filing Document

**Accession Number:** 0000889132
**File Stem:** 0001193125-25-325602
**Filing Date:** 2025-12
**Character Count:** 3716
**Document Hash:** b0e11d9ce8d718e0ea43c996ea5c7acc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-325602.hdr.sgml**: 20251219

**ACCESSION NUMBER**: 0001193125-25-325602

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251219

**FILED AS OF DATE**: 20251219

**DATE AS OF CHANGE**: 20251219

**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:** 251584889

**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 December, 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>Occurrence of a Serious Industrial Accident</u>**

(Disclosure of POSCO HOLDINGS' Subsidiary Company POSCO E&C)

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| | | |
|:---|:---|:---|
| 1. Details of the Serious Accident | Location of Occurrence | Shinansan Line Section 4-2 |
| 1. Details of the Serious Accident | Description of Accident | A worker below was struck by a falling reinforcing bar installed at the top of the tunnel |
| 1. Details of the Serious Accident | Number of Fatalities | 1 |
| 1. Details of the Serious Accident | Number of the Injured | 2 |
| 2. Date of Occurrence of Serious Industrial Accident | 2. Date of Occurrence of Serious Industrial Accident | December 18, 2025 |
| 3. Date of Report to the Ministry of Employment and Labor | 3. Date of Report to the Ministry of Employment and Labor | December 18, 2025 |
| 4. Measures Taken and Future Plans | 4. Measures Taken and Future Plans | A site inspection was conducted (by the police and the Ministry of Employment and Labor), and the Company will establish measures to prevent recurrence. |
| 5. Other important details to be considered for investment decisions | 5. Other important details to be considered for investment decisions | On December 18, 2025, the Seoul Regional Employment and Labor Office, Seoul Southern Branch, issued a partial work suspension order for all lining operations in Section 4-2 |

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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: December 19 , 2025 | By | /s/ Han, Young-Ah |
|  |  | (Signature) |
|  |  | Name: Han, Young-Ah |
|  |  | Title: Senior Vice President |

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