EXPLANATORY NOTE
This Registration Statement on FormS-8 is filed by Altair Engineering Inc. (the “Registrant”) for the purpose of registering additional shares of the Registrant’s Class A common stock, par value $0.0001 per share (the “Class A Common Stock”) under the Registrant’s 2017 Equity Incentive Plan (the “Plan”). The number of shares of Class A Common Stock available for grant and issuance under the Plan is subject to an automatic annual increase on January 1 of each year beginning in 2018 by an amount equal to the lesser of (i) 3% of the number of shares of all classes of the Registrant’s common stock outstanding on December 31 of the preceding calendar year or (ii) a lesser number of shares of Class A Common Stock determined by the Board of Directors of the Company (the “Evergreen Provision”). On January 1, 2020, the number of shares of Class A Common Stock available for grant and issuance under the Plan increased by 2,172,063 shares. This Registration Statement registers such additional shares of Class A Common Stock, which were available for grant and issuance under the Plan pursuant to the Evergreen Provision as of January 1, 2020.
Pursuant to General Instruction E of FormS-8, the contents of the Registration Statements on FormS-8 of the Registrant filed with the Securities and Exchange Commission (the “Commission”) on November 3, 2017 (RegistrationNo. 333-221312), on March 21, 2018 (RegistrationNo. 333-223833) and on March 1, 2019 (RegistrationNo. 333-230019), including any amendments thereto or filings incorporated therein, are incorporated herein by this reference to the extent not replaced hereby.
PART I
Information Required in the Section 10(a) Prospectus
The information called for in Part I of FormS-8 to be contained in the Section 10(a) prospectus is not being filed with or included in this Registration Statement (by incorporation by reference or otherwise) in accordance with the rules and regulations of the Commission. The documents containing the information specified in Part I of FormS-8 will be delivered to the participants in the Plan covered by this Registration Statement as specified by Rule 428(b)(1) under the Securities Act of 1933, as amended (the “Securities Act”).
PART II
Information Required in the Registration Statement
Item 3.Incorporation of Documents by Reference.
The following documents, which have been filed by the Registrant with the Commission pursuant to the Securities Act and the Securities Exchange Act of 1934, as amended (the “Exchange Act”), are incorporated herein by reference:
| (a) | the Registrant’s Annual Report onForm10-K for the year ended December 31, 2019, filed with the SEC on March 2, 2020; and |
| (b) | The description of the Registrant’s Class A Common Stock contained in its Registration Statement onForm8-A(RegistrationNo. 001-38263) filed with the SEC on October 27, 2017 pursuant to Section 12(b) of the Exchange Act, including any amendments or reports filed for the purpose of updating such description. |
All documents filed by the Registrant pursuant to Section 13(a), 13(c), 14, or 15(d) of the Exchange Act subsequent to the filing of this Registration Statement and prior to the filing of a post-effective amendment, which indicates that all securities offered hereby have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the date of filing such documents, except as to specific sections of such documents as set forth therein; provided, however, that documents or information deemed to have been furnished and not filed in accordance with Commission rules shall not be deemed incorporated by reference into this Registration Statement. Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained in any subsequently filed document, which also is deemed to be incorporated by reference herein, modifies or supersedes such statement.
Item 8.Exhibits.