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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
1720808	Gc Investments Llc	C/O Altair Engineering Inc. 1820 E. Big Beaver Road Troy MI 48083		No	No	Yes	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	Acquisiton	2023-12-06	14,411	$0.00	14,411	No	4	C	Direct
Class A Common Stock	Disposition	2023-12-06	13,511	$72.00	900	No	4	S	Direct
Class A Common Stock	Disposition	2023-12-06	900	$72.84	0	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class A Common Stock	Class B Common Stock	Disposition	2023-12-06	14,411	$0.00	14,411	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
4,648,568			No	4	C	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.65 to $72.64 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.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.65 to $73.07 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.
Each share of Class B common stock is immediately convertible, at the option of the shareholder, into one share of Class A common stock and shall automatically convert into Class A common stock upon the occurrence of certain events. Please see Altair Engineering Inc. Registration Statement filed with the Securities and Exchange Commission on Form S-1 (File No. 333-225412) for a description of the conversion rights.