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

Role: Chief Marketing Officer
Signature: /s/ Raoul Maitra, attorney-in-fact for Amy Messano
Issuer symbol: ALTR
Transactions as of: 01 Mar 2023
Net transactions value: -$33,133
Form type: 4
Filing time: 03 Mar 2023, 12:20:49 UTC
Previous filing: 18 Jan 2023
Next filing: 15 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	$20,493	-321	-2.5%	$63.84	12,504	01 Mar 2023	Direct	F1
transaction	ALTR	Class A Common Stock	Sale	$12,640	-198	-1.6%	$63.84	12,306	01 Mar 2023	Direct	F1
transaction	ALTR	Class A Common Stock	Award	$0	+3,542	+29%	$0.000000	15,848	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	+8,855		$0.000000	8,855	02 Mar 2023	Class A Common Stock	8,855	$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 5,662 Class A Common Stock restricted stock units that are unvested.
F2	On March 2, 2023, the Reporting Person was granted 3,542 Class A Common Stock restricted stock units, which vest in 4 equal annual installments commencing March 2, 2024.
F3	Includes 9,204 Class A Common Stock restricted stock units that are unvested.
F4	On March 2, 2023, the Reporting Person was granted 8,855 Class A Common Stock options, the options vest in 4 equal annual installments commencing March 2, 2024.