POSCO creates POSCO Safety Solution subsidiary

POSCO HOLDINGS INC. has established a new wholly owned subsidiary, POSCO SAFETY SOLUTION, focused on occupational safety and health advisory services for business sites.

Rhea-AI Filing Summary

POSCO HOLDINGS INC. has established a new wholly owned subsidiary, POSCO SAFETY SOLUTION, focused on occupational safety and health advisory services for business sites. POSCO is acquiring 926,000 shares, representing 100.0% of the subsidiary, for an equity value of KRW 4,630 million, equal to 0.0% of POSCO’s total assets based on its FY2024 separate financial statements. The total number of POSCO subsidiaries increases from 18 to 19, with the inclusion and board decision dates both on September 17, 2025.

FAQ

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What did POSCO HOLDINGS INC. (PKX) disclose in this Form 6-K?

POSCO HOLDINGS disclosed the establishment of a new wholly owned subsidiary, POSCO SAFETY SOLUTION. The company acquired 926,000 shares for KRW 4,630 million, adding this entity as its 19th subsidiary as of September 17, 2025.

What is POSCO SAFETY SOLUTION and what business will it conduct for PKX?

POSCO SAFETY SOLUTION is a newly established subsidiary of POSCO HOLDINGS. Its main business is providing occupational safety and health advisory services for business sites, focusing on workplace safety consulting and related advisory support within the POSCO group.

How much of POSCO SAFETY SOLUTION does POSCO HOLDINGS (PKX) own?

POSCO HOLDINGS owns 926,000 shares of POSCO SAFETY SOLUTION, representing 100.0% of the subsidiary’s total issued shares. All shares were acquired through a cash contribution made at the time of the subsidiary’s incorporation.

What is the value of POSCO HOLDINGS’ investment in POSCO SAFETY SOLUTION?

The equity value of POSCO HOLDINGS’ 926,000 shares in POSCO SAFETY SOLUTION is KRW 4,630 million. This amount corresponds to 100.0% of the subsidiary’s issued shares and equals 0.0% of POSCO’s total assets based on FY2024 separate financial statements.

How does the new subsidiary affect the total number of POSCO (PKX) subsidiaries?

With the inclusion of POSCO SAFETY SOLUTION, the total number of POSCO HOLDINGS subsidiaries increases from 18 to 19. The change reflects the corporation establishment of the new entity and its consolidation as of September 17, 2025.

When did POSCO SAFETY SOLUTION become a subsidiary of POSCO HOLDINGS (PKX)?

POSCO SAFETY SOLUTION was included as a subsidiary on September 17, 2025. This date is both the share transaction consolidation date and the date of the founders’ general meeting, which serves as the board resolution date for the establishment.

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Accepted by SEC EDGAR 09/17/2025 - 09:50 AM Learn about SEC filing dates

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  ☐

Notice of Inclusion of Subsidiary in Holding Company

1. Details of subsidiary		A. Company name				POSCO SAFETY SOLUTION
		B. Representative				Yu Jaehong
		C. Main business				Occupational Safety and Health Advisory Services for Business Sites
		D. Financial status of the latest fiscal year (KRW mn)		Total assets		—
				Total liabilities		—
				Total shareholders’ equity		—
				Capital stock		—
2. Shareholding ratio of subsidiary		Before inclusion		Shares held (shrs.)		—
				Shareholding ratio (%)		—
		After inclusion		Shares held (shrs.)		926,000
				Shareholding ratio (%)		100.0
3. Percentage of value of shares held to total assets		Before inclusion		Value of shares held (KRW million)		—
				Percentage in total assets (%)		—
		After inclusion		Value of shares held (KRW million)		4,630
				Percentage in total assets (%)		0.0
4. Total number of subsidiaries		Before inclusion				18
		After inclusion				19
5. Reasons for inclusion						Corporation establishment
6. Date of inclusion						September 17, 2025
7. Date of board resolution (decision date)						September 17, 2025
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.

						•  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. •  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. •  Above ‘6.date of inclusion’ refers to the share transaction consolidation date. •  Above ‘7. date of Board resolution (decision date)’ is based on the date of the Founders’ General Meeting of POSCO SAFETY SOLUTION. •  POSCO SAFETY SOLUTION is a business that offers advisory services on occupational safety and health for business sites.
Related disclosure						—

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.

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