Washington, D.C. 20549




Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.     )



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  Soliciting Material Pursuant to §240.14a-12

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LOGO    PAE to be Acquired by Amentum



Valued PAE Customer:

PAE’s parent company (PAE Incorporated) announced today it has entered into an agreement to be acquired by Amentum Government Services Holdings LLC.

We’re excited about the opportunity to join Amentum, a leading contractor to the U.S. federal government supporting programs of critical national importance across defense, security and intelligence, and energy and environmental cleanup.

Amentum understands our business, and the consolidated company would support and strengthen the existing customer relationships that are so critical to our operations. Once combined, we would continue to provide world-class service with the mutual benefit of a strengthened skill set and more diverse capabilities within a similar mission-oriented culture.

We value our relationship with you and want to assure you that your existing, valued business with PAE will continue uninterrupted as we work through this sale process. We do not anticipate any immediate changes to our business relationships. All points of contact and existing agreement(s) with PAE remain unchanged.

While the agreement allows us to consider other proposals in the next 35 days, we expect the transaction with Amentum to close in the first quarter of 2022 unless we receive an alternative proposal that results in changes to the terms of the transaction or pursuit of a different transaction.

If you have questions, you may directly contact [TITLE AND NAME LINKED TO EMAIL] for any matters related to this communication or this pending acquisition. We look forward to our continued partnership with you.


Forward Looking Statements

This communication contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical facts could be forward-looking statements. The words “anticipates,” “believes,” “could,” “designed,” “estimates,” “expects,” “goal,” “intends,” “may,” “plans,” “projects,” “pursuing,” “will,” “would” and similar expressions (including the negatives thereof) are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.

We have based these forward-looking statements largely on our current assumptions, expectations, projections, intentions, objectives and/or beliefs about future events or occurrences and these forward-looking statements are subject to a number of risks, uncertainties and assumptions, including, but not limited to, the following: (i) PAE may be unable to obtain stockholder approval as required for the proposed Transactions; (ii) other conditions to the closing of the proposed Transactions may not be satisfied, including that a governmental entity may prohibit, delay or refuse to grant a necessary regulatory approval; (iii) the proposed Transactions may involve unexpected costs, liabilities or delays; (iv) the business of PAE may suffer as a result

of uncertainty surrounding the proposed Transactions; (v) shareholder litigation in connection with the proposed Transactions may affect the timing or occurrence of the proposed Transactions or result in significant costs of defense, indemnification and liability; (vi) PAE may be adversely affected by other economic, business, and/or competitive factors; (vii) the occurrence of any event, change or other circumstances could give rise to the termination of the Merger Agreement; (viii) the risk that the proposed Transactions disrupts PAE’s current plans and operations or diverts management’s or employees’ attention from ongoing business operations; (ix) the risk of potential difficulties with PAE’s ability to retain and hire key personnel and maintain relationships with third parties as a result of the proposed Transactions; and (x) other risks to consummation of the proposed Transactions, including the risk that the proposed Transactions will not be consummated within the expected time period or at all. Additional factors that may affect the future results of PAE and the proposed Transactions are set forth in filings that PAE makes with the SEC from time to time, including those listed under “Risk Factors” in PAE’s latest Quarterly Report on Form 10-Q, as updated or supplemented by subsequent reports that PAE has filed or files with the SEC. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. The timing of certain events and circumstances and known and unknown risks and uncertainties could cause actual results to differ materially from those anticipated or implied in the forward-looking statements that we make. Therefore, you should not place undue reliance on our forward-looking statements. Our forward-looking statements are based on current information, and we do not assume any obligation to update any forward-looking statements expect as required by the federal securities laws.

Important Information for Investors and Where to Find It

This communication may be deemed to be solicitation material in respect of the proposed acquisition of PAE by Amentum Government Services Holdings LLC. In connection with the proposed transaction, PAE intends to file relevant materials with the SEC, including a proxy statement in preliminary and definitive form, in connection with the solicitation of proxies from PAE’s stockholders for the proposed Transactions. The proxy statement will contain important information about the proposed Transactions and related matters. BEFORE MAKING A VOTING DECISION, STOCKHOLDERS OF PAE ARE URGED TO READ THE PROXY STATEMENT, AND OTHER RELEVANT DOCUMENTS, CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT PAE, THE PROPOSED TRANSACTIONS AND RELATED MATTERS. Investors and stockholders may obtain free copies of the proxy statement and other documents (when available) that PAE files with the SEC through the website maintained by the SEC at Copies of the documents filed with the SEC by PAE will also be available free of charge on PAE’s investor relations website at or by contacting Mark Zindler, PAE’s Vice President of Investor Relations at

Participants in Solicitation

The Company and its directors, executive officers and other members of management and employees, under SEC rules, may be deemed to be “participants” in the solicitation of proxies from the Company’s stockholders with respect to the proposed Transactions. Information regarding the ownership of PAE securities by PAE’s directors and executive officers is included in their SEC filings on Forms 3, 4 and 5, and additional information about PAE’s directors and executive officers is also available in PAE’s proxy statement for its 2021 annual meeting of

stockholders filed with the SEC on April 30, 2021, and is supplemented by other filings made, and to be made, with the SEC by PAE. Information concerning the interests of the Company’s participants in the solicitation, which may, in some cases, be different than those of the Company’s stockholders generally, is set forth in the materials filed by the Company with the SEC, and will be set forth in the proxy statement relating to the proposed transaction when it becomes available. Investors should read such materials carefully before making any voting or investment decision.