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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1701732	Altair Engineering Inc.	ALTR	Services-Prepackaged Software (7372)	382591828

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1762863	Amy Messano	C/O Altair Engineering Inc. 1820 E. Big Beaver Rd. Troy MI 48083	Chief Marketing Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Class A Common Stock	Disposition	2023-03-01	321	$63.84	12,504	No	4	S	Direct
Class A Common Stock	Disposition	2023-03-01	198	$63.84	12,306	No	4	S	Direct
Class A Common Stock	Acquisiton	2023-03-02	3,542	$0.00	15,848	No	4	A	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	S	Direct
No	4	A	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class A Common Stock	Stock Option (Right to Buy)	Acquisiton	2023-03-02	8,855	$0.00	8,855	$65.19

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
8,855		2033-03-02	No	4	A	Direct

Footnotes

Includes 5,662 Class A Common Stock restricted stock units that are unvested.
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.
Includes 9,204 Class A Common Stock restricted stock units that are unvested.
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.