Brian Gayle - 01 Mar 2023 Form 4 Insider Report for Altair Engineering Inc. (ALTR)

Role: Chief Accounting Officer
Signature: /s/ Raoul Maitra, attorney-in-fact for Brian Gayle
Issuer symbol: ALTR
Transactions as of: 01 Mar 2023
Net transactions value: -$10,023
Form type: 4
Filing time: 03 Mar 2023, 12:09:44 UTC
Previous filing: 01 Mar 2023
Next filing: 17 Mar 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALTR	Class A Common Stock	Sale	$10,023	-157	-0.97%	$63.84	15,978	01 Mar 2023	Direct	F1
transaction	ALTR	Class A Common Stock	Award	$0	+2,583	+16%	$0.000000	18,561	02 Mar 2023	Direct	F2, F3

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	ALTR	Stock Option (Right to Buy)	Award	$0	+7,750		$0.000000	7,750	02 Mar 2023	Class A Common Stock	7,750	$65.19	Direct	F4

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

Explanation of Responses:

Id	Content
F1	Includes 3,726 Class A Common Stock restricted stock units that are unvested.
F2	On March 2, 2023, the Reporting Person was granted 2,583 Class A Common Stock restricted stock units, which vest in 4 equal annual installments commencing March 2, 2024.
F3	Includes 6,309 Class A Common Stock restricted stock units that are unvested.
F4	On March 2, 2023, the Reporting Person was granted 7,750 Class A Common Stock options, the options vest in 4 equal annual installments commencing March 2, 2024.