POSCO Holdings (PKX) to invest $765M for 30% lithium stake

POSCO HOLDINGS INC. announced a cash acquisition plan to obtain a 30% stake in an intermediate holding company to be incorporated by Mineral Resources Ltd. to operate a lithium business.

Rhea-AI Filing Summary

POSCO HOLDINGS INC. announced a cash acquisition plan to obtain a 30% stake in an intermediate holding company to be incorporated by Mineral Resources Ltd. to operate a lithium business. The planned investment totals KRW 1,112,080,500,000 (USD 765,000,000 at KRW 1,453.70 per USD), representing 1.8% of POSCO HOLDINGS’ equity capital.

The board approved the transaction on November 11, 2025. The purpose is to invest in prominent assets to enhance the cost-competitiveness of the lithium business. Completion timing may change based on merger filings in Australia and/or China, FIRB approval in Australia, and agreement between the parties. No put or call options are part of the agreement.

Insights

Cross-border M&A and commodities analyst

Neutral: $765M cash deal for 30% lithium stake, pending approvals.

POSCO HOLDINGS plans to invest USD 765,000,000 (KRW 1.112T) for a 30% interest in a new Australian intermediate holding company tied to Mineral Resources Ltd. The board approved on November 11, 2025, positioning the group to support lithium cost competitiveness.

While strategic, the filing quantifies the size at 1.8% of equity capital, suggesting modest balance-sheet impact. Execution depends on merger filings in Australia/China and FIRB approval in Australia; actual closing will hinge on these clearances and final agreements.

The filing lists a cash acquisition method and no option structures. Subsequent filings may provide the incorporation details and final schedule once regulatory steps are completed.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What is POSCO HOLDINGS (PKX) investing in according to the 6-K?

A cash acquisition of a 30% stake in an Australian intermediate holding company to operate a lithium business with Mineral Resources Ltd.

How much is POSCO HOLDINGS (PKX) investing?

The investment is KRW 1,112,080,500,000, equal to USD 765,000,000 using an exchange rate of KRW 1,453.70 per USD.

What is the size of the deal relative to POSCO HOLDINGS’ equity?

The filing states a ratio to equity capital of 1.8%.

What approvals could affect the deal’s timing for POSCO HOLDINGS (PKX)?

Timing may change based on merger filings in Australia and/or China and FIRB approval in Australia, plus agreement between the parties.

When did POSCO HOLDINGS approve the transaction?

The board resolution date is November 11, 2025.

What is the purpose of the acquisition?

To invest in prominent assets to enhance cost-competitiveness of the company’s lithium business.

Are there any option agreements included?

No. The filing states there are no put or call options in this transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 11/12/2025 - 06:04 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 November, 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 ☐

Decision on Acquisition of Shares or Investment Certificates of Other Corporation

(Voluntary Disclosure)

1. Details of Issuing Company

Name of Company

LithiumCo (pseudonym)

Nationality

Australia

Representative

-

Capital Stock (KRW)

-

Relationship to Company

-

Total Number of Shares Issued

-

Main Business

Mining

2. Details of Acquisition

Number of Shares to Be Acquired

-

Acquisition Amount (KRW)

1,112,080,500,000

Equity Capital (KRW)

61,450,367,919,684

Ratio to Equity Capital (%)

1.8

If Classified as a Large-scale Corporation

Yes

3. Number of Shares Held and Shareholding Ratio after Acquisition

Number of Shares Held

-

Shareholding Ratio(%)

30

4. Acquisition Method

Cash Acquisition

5. Purpose of Acquisition

Investment in prominent assets to enhance cost-competitiveness of the lithium business

6. Scheduled Acquisition Date

-

7. Date of Board Resolution (Decision Date)

2025-11-11

- Attendance of Outside Directors

Present(No.)

6

Absent(No.)

-

- Attendance of Auditors(members of Audit Committee)

-

8. If entered into an agreement for Put Option, Call Option, Put Back Option, etc.

No

- Details of agreements

-

9. Other references useful for making investment decisions

- This disclosure pertains to the acquisition of 30% of the shares by POSCO HOLDINGS of the intermediate holding company to be incorporated by Mineral Resources Ltd. in Australia to operate the lithium business.

- Under ‘1. Details of the Issuing Company’, Name of Company, Representative, Capital Stock, and Total Number of Shares Issued have been omitted since the Issuing Company has yet to be incorporated. As soon as the information is generated, an amended disclosure will be submitted.

- Under ‘2. Details of Acquisition’, Number of Shares to Be Acquired remains unstated as the Issuing Company has yet to be incorporated. This information will be provided with an amended disclosure once it is confirmed.

- Under ‘2. Details of Acquisition’, Acquisition amount (in KRW) is USD 765,000,000, which applied the SMBS basic exchange rate (1 USD= 1,453.70) on the date of the Board resolution, or November 11, 2025.

- Item ‘6. Scheduled Acquisition Date’ may change based on the progress of the merger filing in Australia and/or China, FIRB approval in Australia, and/or agreement between the parties.

- Item ‘7. Date of Board Resolution’ refers to the date of resolution by the POSCO HOLDINGS Board.

- The aforementioned schedule and details may change based on the progress of the transaction; any change will be reported by submitting amended disclosures.

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: November 12 , 2025				By		/s/ Han, Young-Ah
						(Signature)
						Name: Han, Young-Ah
						Title: Senior Vice President