Sara Ponessa - Jan 4, 2024 Form 4 Insider Report for Arcadium Lithium plc (ALTM)

Role: VP, Gen Counsel & Sec
Signature: /s/ Sara Ponessa
Stock symbol: ALTM
Transactions as of: Jan 4, 2024
Transactions value $: $0
Form type: 4
Date filed: 1/8/2024, 04:22 PM
Previous filing: Dec 27, 2023
Next filing: Feb 1, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALTM	Ordinary Shares	Award		+49.8K			49.8K	Jan 4, 2024	Direct	F1
transaction	ALTM	Ordinary Shares	Award		+66.6K	+133.69%		116K	Jan 4, 2024	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ALTM	Stock Option (Right to Buy)	Award		+29.4K			29.4K	Jan 4, 2024	Ordinary Shares	29.4K	$9.70	Direct	F3
transaction	ALTM	Stock Option (Right to Buy)	Award		+27.9K			27.9K	Jan 4, 2024	Ordinary Shares	27.9K	$8.74	Direct	F3
transaction	ALTM	Stock Option (Right to Buy)	Award		+85.9K			85.9K	Jan 4, 2024	Ordinary Shares	85.9K	$8.46	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the conversion of common stock of Livent Corporation ("Livent"), par value $0.001 per share ("Livent Common Stock"), held by the reporting person as of January 4, 2024, into ordinary shares of Arcadium Lithium plc ("Arcadium"), par value $1.00 per share ("Arcadium Ordinary Shares"), in accordance with the terms of the Transaction Agreement, dated as of May 10, 2023, by and between Livent, Allkem Limited ("Allkem"), Lightning-A Merger Sub, Inc. and Arcadium, providing for a combination of Livent and Allkem in a merger of equals transaction (as amended, the "Transaction Agreement").
F2	Represents the conversion of restricted share units with respect to shares of Livent Common Stock ("Livent RSUs"), held by the reporting person as of January 4, 2024, into restricted share units with respect to Arcadium Ordinary Shares ("Arcadium RSUs"), in accordance with the terms of the Transaction Agreement, in connection with the merger of equals transaction.
F3	Represents the conversion of stock options to purchase Livent Common Stock ("Livent Options") into stock options to purchase Arcadium Ordinary Shares ("Arcadium Options"), in accordance with the terms of the Transaction Agreement, in connection with the merger of equals transaction.