[6-K] POSCO HOLDINGS INC. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

POSCO Holdings Inc. submitted a report responding to market speculation about a potential acquisition of HMM. The rumor, carried by the Maeil Business Newspaper, stated that Kim Jae-Chul is seeking to win a 10 trillion won HMM acquisition deal, described as the crown jewel of his business ambitions. POSCO classifies its response to these rumors as "undetermined," meaning it has not provided a confirming or denying explanation at this time. The company indicates it plans to provide a further update with a re-disclosure date set for January 2, 2026, signaling that investors may receive more clarity then.

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 ☐

Response to Rumors or Media Reports : Undetermined

This announcement is a follow-up to the one released on December 5, 2025.

1. Contents of rumors or media reports

Kim Jae-Chul vies to win the 10 trillion won HMM acquisition battle, which he describes as the crown jewel of his business ambition

2. Channel of rumors or media reports

Maeil Business Newspaper

3. Distributed date of rumors or media reports

December 5, 2025

4. Company’s explanation for rumors or media reports

• This disclosure is an official notice of “Kim Jae-Chul vies to win the 10 trillion won HMM acquisition battle, which he describes as the crown jewel of his business ambition” published by Maeil Business Newspaper on December 5, 2025.

• As a part of the company’s steel business strategy to seek growth overseas and to expand our presence in the high-profit US market, POSCO HOLDINGS has signed an MOU with Cleveland Cliffs. Discussions are underway regarding equity ownership and investment size; however, no decisions have been finalized.

• In this regard, we will re-disclose the information when specific matters are decided in the future or within one month.

5. Re-disclosure date

January 2, 2026

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: December 8, 2025				By		/s/ Han, Young-Ah
				(Signature)
				Name: Han, Young-Ah
				Title: Senior Vice President