Christ Revocable Trust - Sep 24, 2021 Form 4 Insider Report for Altair Engineering Inc. (ALTR)

Role: 10%+ Owner
Signature: /s/ Raoul Maitra, attorney-in-fact for Christ Revocable Trust dated May 8, 2015
Stock symbol: ALTR
Transactions as of: Sep 24, 2021
Transactions value $: $0
Form type: 4
Date filed: 9/27/2021, 02:03 PM
Previous filing: Sep 3, 2021
Next filing: Oct 12, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALTR	Class A Common Stock	Conversion of derivative security	$0	+375K		$0.00	375K	Sep 24, 2021	Direct
transaction	ALTR	Class A Common Stock	Gift	$0	-187K	-50%	$0.00	187K	Sep 24, 2021	Direct	F1
transaction	ALTR	Class A Common Stock	Gift	$0	-187K	-100%	$0.00^*	0	Sep 24, 2021	Direct	F1

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	Class B Common Stock	Conversion of derivative security	$0	-375K	-5.99%	$0.00	5.88M	Sep 24, 2021	Class A Common Stock	375K	$0.00	Direct	F2

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

Explanation of Responses:

Id	Content
F1	On September 24, 2021, the reporting person transferred 187,475 shares of Class A common stock to a family trust of which the Trustee of the reporting person serves as co-Trustee. A member of the Trustee's immediate family is the sole beneficiary of the trust.
F2	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.

Content

On September 24, 2021, the reporting person transferred 187,475 shares of Class A common stock to a family trust of which the Trustee of the reporting person serves as co-Trustee. A member of the Trustee's immediate family is the sole beneficiary of the trust.

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.