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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
1763738	L David Simon	C/O Altair Engineering Inc. 1820 E. Big Beaver Road Troy MI 48083	Chief Administrative 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	Explanation
Class A Common Stock	Disposition	2021-03-12	91	$59.52	21,950	No	4	S	Direct
Class A Common Stock	Acquisiton	2021-03-15	1,675	$0.00	23,625	No	4	A	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
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	2021-03-15	5,443	$0.00	5,443	$61.93

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
5,443		2031-03-15	No	4	A	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $59.45 to $61.09 per share, inclusive. The reporting person undertakes to provide to Altair Engineering Inc., any security holder of Altair Engineering Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.
Includes 2,461 Class A Common Stock restricted stock units that are unvested.
On March 15, 2021, the Reporting Person was granted 1,675 Class A Common Stock restricted stock units, which vest in 4 equal annual installments commencing March 15, 2022.
Includes 3,655 Class A Common Stock restricted stock units that are unvested.
On March 15, 2021, the Reporting Person was granted 5,443 Class A Common Stock options, the options vest in 4 equal annual installments commencing March 15, 2022.