As filed with the Securities and Exchange Commission on January 4, 2024
    
    
    Registration No. 333-251997
    Registration No. 333-232043
    Registration No. 333-230076
    Registration No. 333-230044
    Registration No. 333-227776
    
      
    UNITED STATES
    SECURITIES AND EXCHANGE COMMISSION
    WASHINGTON, D.C. 20549
    
      
    POST-EFFECTIVE AMENDMENT TO
    FORM S-8 REGISTRATION STATEMENTS
    UNDER
    THE SECURITIES ACT OF 1933
    
      
    Registration Statement No. 333-251997
    Registration Statement No. 333-232043
    Registration Statement No. 333-230076
    Registration Statement No. 333-230044
    Registration Statement No. 333-227776
    
      
    LIVENT CORPORATION
    (Exact Name of Registrant as Specified in Its Charter)
    
      
    
        
          | Delaware | 82-4699376 | 
        
          | (State or Other Jurisdiction of Incorporation or Organization) | (I.R.S. Employer Identification No.) | 
    
    
    
    1818 Market Street
    Philadelphia, Pennsylvania, 19103
    215-299-5900
    (Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)
    
      
    Sara Ponessa
    Vice President, General Counsel and Secretary
    Livent Corporation
    1818 Market Street
    Philadelphia, Pennsylvania, 19103
    215-299-5900
    (Name, address, including zip code, and telephone number, including area code, of agent for service)
    
      
    Approximate date of commencement of proposed sale to the public: Not applicable
    
    
    If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.  ☐
    
    
    If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest
      reinvestment plans, check the following box.  ☐
    
    
    If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective
      registration statement for the same offering.  ☐
    
    
    If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same
      offering.  ☐
    
    
    If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following
      box.  ☐
    
    
    If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check
      the following box.  ☐
    
    
    Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated
      filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
    
    
    
        
          | Large accelerated filer | ☒ |  | Accelerated filer | ☐ | 
        
          | Non-accelerated filer | ☐ |  | Smaller reporting company | ☐ | 
        
          |  |  |  | Emerging growth company | ☐ | 
    
    
    
    If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for comply with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of Securities
      Act  ☐
      
    
    
    
    EXPLANATORY NOTE
    DEREGISTRATION OF SECURITIES
    
    
    Livent Corporation, a Delaware corporation (the “Registrant”), is filing this Post-Effective Amendment (this “Post-Effective Amendment”) with respect to the following Registration Statements on Form S-8 (collectively,
      the “Registration Statements”), originally filed by the Registrant, with the Securities and Exchange Commission:
    
    
    
        
          | 
 | • | Registration Statement No. 333-251997 on Form S-8, filed on January 8, 2021 , registering 4,393,837 shares of the Registrant’s common
              stock, par value $0.001 per share (“Registrant Common Stock”). | 
    
    
    
    
        
          | 
 | • | Registration Statement No. 333-232043 on Form S-8, filed on June 10, 2019 , registering 1,000,000 shares of Registrant Common Stock. | 
    
    
    
    
        
          | 
 | • | Registration Statement No. 333-230076 on Form S-8, filed on March 5, 2019 , registering 2,000,000 shares of Registrant Common Stock. | 
    
    
    
    
        
          | 
 | • | Registration Statement No. 333-230044 on Form S-8, filed on March 1, 2019 , registering deferred compensation obligations pursuant to the
              Livent Nonqualified Savings Plan in the amount of $5,000,000. | 
    
    
    
    
        
          | 
 | • | Registration Statement No. 333-227776 on Form S-8, filed on October 10, 2018 , registering 4,290,000 shares of Registrant Common Stock. | 
    
    
    
    On January 4, 2024, the transactions (collectively, the “transaction”) contemplated by the Transaction Agreement dated as of May 10, 2023, as amended by the Amendment to Transaction Agreement, dated as of August 2,
      2023, the Second Amendment to Transaction Agreement, dated as of November 5, 2023 and the Third Amendment to Transaction Agreement, dated as of December 20, 2023 (as amended, the “Transaction Agreement”), by and among the Registrant, Allkem Limited,
      an Australian public company limited by shares (“Allkem”), Arcadium Lithium plc, a public limited company incorporated under the laws of the Bailiwick of Jersey (“Arcadium”), Lightning-A Merger Sub, Inc., a Delaware corporation (“Merger Sub”) and
      Arcadium Lithium Intermediate IRL Limited, a private company limited by shares and incorporated and registered in Ireland (“Irish IntermediateCo”) were completed and the Registrant became an indirect wholly owned subsidiary of Arcadium.
    
    
    The Registrant, by filing this Post-Effective Amendment, hereby terminates the effectiveness of the Registration Statements and removes from registration any and all securities registered but unsold or otherwise
      unissued under the Registration Statements as of the date hereof. This filing is made in accordance with an undertaking made by the Registrant in Part II of the Registration Statements to remove from registration by means of a post-effective
      amendment any securities that had been registered for issuance but remain unsold or unissued at the termination of the offering.  The Registration Statements are hereby amended, as appropriate, to reflect the deregistration of such securities.
     
    
    
    
    
    SIGNATURES
    
    
    Pursuant to the requirements of the Securities Act of 1933, as amended (the “Securities Act”), the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form
      S-8 and has duly caused this Post-Effective Amendment to be signed on its behalf by the undersigned, thereunto duly authorized, in the city of Philadelphia, Commonwealth of Pennsylvania, on January 4, 2024.
    
    
    
        
          |  | LIVENT CORPORATION | 
        
          |  |  |  | 
        
          |  | By: |  | 
        
          |  |  | Name: | Paul W. Graves | 
        
          |  |  | Title: | President and Chief Executive Officer | 
    
    
    
    Note: Pursuant to Rule 478 of the Securities Act, no other person is required to sign this Post-Effective Amendment to the Registration Statements.