Participants in Solicitation

Altair, Parent, Siemens AG, their respective directors and certain of their respective executive officers may be considered participants in the solicitation of proxies in connection with the proposed transaction. Information about the directors and executive officers of Altair, their ownership of Altair common shares, and Altair’s transactions with related persons is set forth in its Annual Report on Form 10-K for the fiscal year ended December 31, 2023, which was filed with the SEC on February 22, 2024 (and which is available at https://www.sec.gov/ix?doc=/Archives/edgar/data/0001701732/000095017024018804/altr-20231231.htm), in its proxy statement on Schedule 14A for its 2024 Annual Meeting of Stockholders in the sections entitled “Corporate Governance Matters,” “Security Ownership of Certain Beneficial Owners and Management” and “Transactions with Related Persons”, which was filed with the SEC on April 5, 2024 (and which is available at https://www.sec.gov/ix?doc=/Archives/edgar/data/0001701732/000119312524087903/d722499ddef14a.htm), certain of its Quarterly Reports on Form 10-Q and certain of its Current Reports on Form 8-K.

These documents can be obtained free of charge from the sources indicated above. Additional information regarding the participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the proxy statement and other relevant materials to be filed with the SEC when they become available.

No Offer or Solicitation

This communication is for informational purposes only and is not intended to and shall not constitute an offer to buy or sell or the solicitation of an offer to buy or sell any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.

Forward-Looking Statements

This communication contains “forward-looking statements” within the Private Securities Litigation Reform Act of 1995. Any statements contained in this communication that are not statements of historical fact, including statements regarding the proposed transaction, including the expected timing and closing of the proposed transaction; Altair’s ability to consummate the proposed transaction; the expected benefits of the proposed transaction and other considerations taken into account by the Altair Board of Directors in approving the proposed transaction; the amounts to be received by stockholders and expectations for Altair prior to and following the closing of the proposed transaction, may be deemed to be forward-looking statements. All such forward-looking statements are intended to provide management’s current expectations for the future of Altair based on current expectations and assumptions relating to Altair’s business, the economy and other future conditions. Forward-looking statements generally can be identified through the use of words such as “believes,” “anticipates,” “may,” “should,” “will,” “plans,” “projects,” “expects,” “expectations,” “estimates,” “forecasts,” “predicts,” “targets,” “prospects,” “strategy,” “signs,” and other words of similar meaning in connection with the discussion of future performance, plans, actions or events. Because forward-looking statements relate to the future, they are subject to inherent risks, uncertainties and changes in circumstances that are difficult to predict. Such risks and uncertainties include, among others: (i) the timing to consummate the proposed transaction, (ii) the risk that a condition of closing of the proposed transaction may not be satisfied or that the closing of the proposed transaction might otherwise not occur, (iii) the risk that a regulatory approval that may be required for the proposed transaction is not obtained or is obtained subject to conditions that are not anticipated, (iv) the diversion of management time on transaction-related issues, (v) risks related to disruption of management time from ongoing business operations due to the proposed transaction, (vi) the risk that any announcements relating to the proposed transaction could have adverse effects on the market price of the common stock of Altair, (vii) the risk that the proposed transaction and its announcement could have an adverse effect on the ability of Altair to retain customers and retain and hire key personnel and maintain relationships with its suppliers and customers, (viii) the occurrence of any event, change or other circumstance or condition that could give rise to the termination of the Merger Agreement, dated October 30, 2024, with Siemens (the “Merger Agreement”), including in circumstances requiring Altair to pay a termination fee, (ix) the risk that competing offers will be made; (x) unexpected costs, charges or expenses resulting from the merger, (xi) potential litigation relating to the merger that could be instituted against the parties to the Merger Agreement or their respective directors, managers or officers, including the effects of any outcomes related thereto, (xii) worldwide economic or political changes that affect the markets that Altair’s businesses serve which could have an effect on demand for Altair’s products and impact Altair’s profitability and (xiii) disruptions in the global credit and financial markets, including diminished liquidity and credit availability, changes in international trade agreements, including tariffs and trade restrictions, cyber-security vulnerabilities, foreign currency volatility, swings in consumer confidence and spending, raw material pricing and supply issues, retention of key employees, increases in fuel prices, and outcomes of legal proceedings, claims and investigations. Accordingly, actual results may differ materially from those contemplated by these forward-looking statements. Investors, therefore, are cautioned against relying on any of these forward-looking statements. They are neither statements of historical fact nor guarantees or assurances of future performance. Additional information regarding the factors that may cause actual results to differ materially from these forward-looking statements is available in Altair’s filings with the SEC, including the risks and uncertainties identified in Part I, Item 1A - Risk Factors of Altair’s Annual Report on Form 10-K for the year ended December 31, 2023 and in Altair’s other filings with the SEC. The list of factors is not intended to be exhaustive.

These forward-looking statements speak only as of the date of this communication, and Altair does not assume any obligation to update or revise any forward-looking statement made in this communication or that may from time to time be made by or on behalf of Altair.

Media Relations
Altair
Jennifer Ristic
216-849-3109
jristic@altair.com

Investor Relations
Altair
Stephen Palmtag
669-328-9111
spalmtag@altair.com

ALTAIR ENGINEERING INC. AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS
	September 30, 2024				December 31, 2023
(In thousands)	(Unaudited)
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	513,371			$	467,459
Accounts receivable, net		121,345				190,461
Income tax receivable		20,794				16,650
Prepaid expenses and other current assets		31,489				26,053
Total current assets		686,999				700,623
Property and equipment, net		40,908				39,803
Operating lease right of use assets		31,856				30,759
Goodwill		476,209				458,125
Other intangible assets, net		84,904				83,550
Deferred tax assets		9,661				9,955
Other long-term assets		47,331				40,678
TOTAL ASSETS	$	1,377,868			$	1,363,493
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	3,607			$	8,995
Accrued compensation and benefits		43,497				45,081
Current portion of operating lease liabilities		8,212				8,825
Other accrued expenses and current liabilities		40,267				48,398
Deferred revenue		114,525				131,356
Current portion of convertible senior notes, net		—				81,455
Total current liabilities		210,108				324,110
Convertible senior notes, net		226,812				225,929
Operating lease liabilities, net of current portion		24,484				22,625
Deferred revenue, non-current		26,310				32,347
Other long-term liabilities		53,254				47,151
TOTAL LIABILITIES		540,968				652,162
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Preferred stock ($0.0001 par value), authorized 45,000 shares, none issued and outstanding		—				—
Common stock ($0.0001 par value)
Class A common stock, authorized 513,797 shares, issued and outstanding 59,518   and 55,240 shares as of September 30, 2024, and December 31, 2023, respectively		5				5
Class B common stock, authorized 41,203 shares, issued and outstanding 25,432   and 26,814 shares as of September 30, 2024, and December 31, 2023, respectively		3				3
Additional paid-in capital		971,835				864,135
Accumulated deficit		(117,324	)			(130,503	)
Accumulated other comprehensive loss		(17,619	)			(22,309	)
TOTAL STOCKHOLDERS’ EQUITY		836,900				711,331
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	1,377,868			$	1,363,493