If You Invested in Arcadium Lithium plc (ALTM)

Arcadium Lithium plc (NYSE: ALTM, ASX: LTM), historically represented by the ticker ALTM on the New York Stock Exchange, is described in its public communications as a global lithium chemicals producer. The company focuses on harnessing lithium to support renewable energy, electric transportation and other high-performance applications. According to multiple Arcadium Lithium news releases, the business is vertically integrated across lithium extraction and lithium chemicals manufacturing and has operations and projects in Argentina, Australia, Canada, China, Japan, the United Kingdom and the United States.

Arcadium Lithium states that it is committed to safely and responsibly using lithium to improve people's lives and to support the transition to a clean energy future. Its public disclosures explain that the company works with customers to support applications where lithium enables possibilities in renewable energy, electric vehicles and modern life. The company highlights capabilities across several lithium extraction processes, including hard-rock mining, conventional brine extraction and direct lithium extraction (DLE), as well as manufacturing lithium chemicals for high performance uses.

Business focus and operations

Arcadium Lithium’s business centers on the production of lithium compounds and specialties. The company reports on lithium hydroxide and lithium carbonate, butyllithium and other lithium specialties, and spodumene concentrate in its financial summaries. These disclosures indicate that Arcadium Lithium participates in multiple parts of the lithium value chain, from extraction of lithium-bearing materials through to the manufacture of lithium chemicals.

Arcadium Lithium’s releases describe it as vertically integrated, with capabilities across hard-rock mining, conventional brine extraction and direct lithium extraction. The company also refers to lithium chemicals manufacturing for high performance applications. Its operations and projects are described as being located in several countries, including Argentina, Australia, Canada, China, Japan, the United Kingdom and the United States.

Corporate status and acquisition by Rio Tinto

Arcadium Lithium has undergone a major corporate change. A definitive agreement was announced under which Rio Tinto would acquire Arcadium Lithium in an all-cash transaction. Subsequent news dated February 13, 2025 states that Arcadium Lithium received all required pre-closing regulatory approvals for the proposed acquisition, and that its shares and CHESS Depositary Receipts would be delisted from the New York Stock Exchange and the Australian Securities Exchange in connection with completion of the transaction.

A later announcement from Rio Tinto dated March 6, 2025 confirms that Rio Tinto completed its acquisition of Arcadium Lithium plc for $6.7 billion, following sanctioning of the scheme of arrangement by the Royal Court of Jersey on March 5. That announcement states that Rio Tinto is now the ultimate parent company of Arcadium Lithium, that Arcadium Lithium will become Rio Tinto Lithium, and that Arcadium Lithium’s shares and CHESS Depositary Receipts will be delisted from the NYSE and ASX. As a result, the ALTM ticker represents a former standalone public company that is now part of Rio Tinto.

In a separate index announcement, S&P Dow Jones Indices notes that Entegris Inc. will replace Arcadium Lithium plc (NYSE: ALTM) in the S&P MidCap 400 index, and that Arcadium Lithium is being deleted from the index because it is being acquired by Rio Tinto. This further supports that ALTM is no longer part of the S&P MidCap 400 and that Arcadium Lithium has transitioned into a wholly owned business within Rio Tinto.

Role in lithium and clean energy applications

Arcadium Lithium’s own descriptions emphasize its role in lithium supply for applications tied to renewable energy and electric transportation. The company states that it collaborates with customers to drive innovation and to support a more sustainable world in which lithium enables possibilities for renewable energy, electric transportation and modern life. Its vertically integrated model, as described in its news releases, includes extraction processes such as hard-rock mining, conventional brine extraction and direct lithium extraction, along with lithium chemicals manufacturing for high performance applications.

Arcadium Lithium’s financial news releases provide additional context on its product mix. The company reports revenue and volumes for lithium hydroxide and lithium carbonate, butyllithium and other lithium specialties, and spodumene concentrate. These categories show that Arcadium Lithium participates in both upstream extraction and downstream chemical processing of lithium-bearing materials.

Geographic footprint

Across multiple news releases, Arcadium Lithium describes itself as having operations around the world, with facilities and projects in Argentina, Australia, Canada, China, Japan, the United Kingdom and the United States. These locations are mentioned consistently in the company’s descriptions in connection with its vertically integrated lithium extraction and lithium chemicals manufacturing activities.

Historical context for ALTM shareholders

For investors researching the historical ALTM stock, it is important to recognize that Arcadium Lithium plc has been acquired by Rio Tinto and is no longer an independent listed company. The Rio Tinto acquisition announcement explains that Arcadium Lithium will become Rio Tinto Lithium and that its shares and CHESS Depositary Receipts will be delisted from the NYSE and ASX. An S&P Dow Jones Indices release also records the removal of Arcadium Lithium from the S&P MidCap 400 index in connection with this acquisition.

Historical information about Arcadium Lithium’s operations, products and financial performance is available through its past public communications and regulatory filings. These materials, including its annual and quarterly reports, earnings releases and transaction-related documents, provide detail on its lithium extraction processes, lithium chemicals manufacturing activities and geographic footprint before it became part of Rio Tinto.