Barbara A. Fochtman - Sep 1, 2024 Form 3 Insider Report for Arcadium Lithium plc (ALTM)

Role: Chief Operations Officer
Signature: /s/ Sara Ponessa, as Attorney-in-Fact
Stock symbol: ALTM
Transactions as of: Sep 1, 2024
Transactions value $: $0
Form type: 3
Date filed: 9/5/2024, 11:17 AM

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	ALTM	Ordinary Shares						167K	Sep 1, 2024	Direct	F1
holding	ALTM	Ordinary Shares						9.62K	Sep 1, 2024	By Spouse

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
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	209K	$4.95	Direct	F2
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	22.8K	$9.70	Direct	F3
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	25.7K	$8.74	Direct	F3
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	77.4K	$8.46	Direct	F4
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	12.6K	$4.05	Direct	F4
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	24.8K	$5.10	Direct	F4
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	48.6K	$7.07	Direct	F4
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	41.7K	$3.45	Direct	F4
holding	ALTM	Stock Option (Right to Buy)							Sep 1, 2024	Ordinary Shares	23.2K	$2.24	Direct	F4

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

Explanation of Responses:

Id	Content
F1	Includes (i) 6,521 restricted stock units originally granted on February 23, 2022, which are scheduled to vest in full on the third anniversary of the date of grant, (ii) 12,846 restricted stock units originally grants on February 22, 2023, which are scheduled to vest in full on the third anniversary of the date of grant, and (iii) 80,809 restricted stock units granted on March 6, 2024, which are scheduled to vest in equal instalments on each of the first three anniversaries of the date of grant, in each case subject to the terms of the applicable plan and award agreement issued thereunder.
F2	Reflects stock options to purchase ordinary shares of the Issuer. The stock options are scheduled to vest and become exercisable in equal instalments on each of the first three anniversaries of the date of grant, subject to the terms of the applicable plan and the applicable award agreement issued thereunder. The stock options will expire on the tenth anniversary of the date of grant.
F3	Reflects stock options to purchase ordinary shares of the Issuer. The stock options are scheduled to vest and become exercisable in full on the third anniversary of the date of grant, subject to the terms of the applicable plan and the applicable award agreement issued thereunder. The stock options will expire on the tenth anniversary of the date of grant.
F4	Reflects vested stock options to purchase ordinary shares of the Issuer. The stock options will expire on the tenth anniversary of the date of grant.