George J Christ Form 4 Altair Engineering / George J Christ ownership change

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Christ George J

(Last) (First) (Middle)

C/O ALTAIR ENGINEERING INC.

1820 E. BIG BEAVER RD.

(Street)

TROY MI 48083

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Altair Engineering Inc. [ ALTR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/23/2024

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	10/23/2024		S		2,995	D	$101.9199(1)	97,005	I	By Christ Revocable Trust dated May 8, 2015(2)
Class A Common Stock	10/23/2024		S		7,040	D	$103.0218(3)	89,965	I	By Christ Revocable Trust dated May 8, 2015(2)
Class A Common Stock	10/23/2024		S		1,724	D	$104.4948(4)	88,241	I	By Christ Revocable Trust dated May 8, 2015(2)
Class A Common Stock	10/23/2024		S		14,545	D	$106.5022(5)	73,696	I	By Christ Revocable Trust dated May 8, 2015(2)
Class A Common Stock	10/23/2024		S		69,096	D	$107.0794(6)	4,600	I	By Christ Revocable Trust dated May 8, 2015(2)
Class A Common Stock	10/23/2024		S		3,601	D	$108.2923(7)	999	I	By Christ Revocable Trust dated May 8, 2015(2)
Class A Common Stock	10/23/2024		S		999	D	$109.1316(8)	0	I	By Christ Revocable Trust dated May 8, 2015(2)
Class A Common Stock								187,475	I	By The Dana Christ Irrevocable Trust Dated May 8, 2015(9)
Class A Common Stock								187,475	I	By The Lauren Christ Irrevocable Trust Dated May 8, 2015(9)
Class A Common Stock								300,000	I	By GC Investments LLC(10)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.35 to $102.24 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.

2. Reporting person serves as Trustee. Reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.50 to $103.41 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.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.19 to $104.69 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.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.77 to $106.765 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.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.78 to $107.695 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.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.86 to $108.85 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.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.94 to $109.99 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.

9. Reporting person serves as co-Trustee. Reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

10. Reporting person serves as Manager. Reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

	/s/ Raoul Maitra, attorney-in-fact for George J. Christ	10/25/2024
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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