X0206 3 2020-02-10 0 0001720821 PAE Inc PAE 0001676357 Platinum Equity Investment Holdings III, LLC C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, BEVERLY HILLS CA 90210 0 0 1 0 0001228754 PLATINUM EQUITY LLC C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, BEVERLY HILLS CA 90210 0 0 1 0 0001757175 Platinum Equity Investment Holdings III Manager, LLC C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, BEVERLY HILLS CA 90210 0 0 1 0 0001471783 Gores Tom C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, BEVERLY HILLS CA 90210 0 0 1 0 Class A Common Stock 22466228 I See footnotes Warrants 11.50 2020-03-11 2025-02-10 Class A Common Stock 958170 I See footnotes Consists of 20,919,578 shares of Class A Common Stock held by PE Shay Holdings, LLC and 1,546,650 shares of Class A Common Stock held by Platinum Equity, LLC. Platinum Equity Capital Shay Partners I, L.P., Platinum Equity Capital Shay Partners II, L.P., Platinum Equity Capital Partners-A III, L.P., Platinum Equity Capital Partners-B III, L.P. and Platinum Equity Capital Partners-C III, L.P. (collectively, the "Platinum Funds") collectively own a majority of the equity interests of PE Shay Holdings, LLC. As a result, the Platinum Funds may be deemed to beneficially own the securities held by PE Shay Holdings, LLC. Platinum Equity, LLC is the sole member of Platinum Equity Investment Holdings III Manager, LLC, which is the sole manager of Platinum Equity Investment Holdings III, LLC, which is the senior managing member of Platinum Equity Partners III, LLC. Platinum Equity Partners III, LLC is the general partner of each of the Platinum Funds. Therefore, each of the foregoing entities may be deemed to share beneficial ownership of the securities beneficially owned by the Platinum Funds. Mr. Gores is the Chairman and Chief Executive Officer of Platinum Equity, LLC. As a result, Mr. Gores may be deemed to share voting and investment power with respect to all shares of Class A Common Stock of the Issuer beneficially owned by Platinum Equity, LLC. Mr. Gores disclaims any beneficial ownership with respect to such securities except to the extent of his pecuniary interest therein. Represents securities held by Platinum Equity, LLC. Due to the limitations of the electronic filing system Platinum Equity Partners III, LLC, Platinum Equity Capital Shay Partners I, L.P., Platinum Equity Capital Shay Partners II, L.P., Platinum Equity Capital Partners-A III, L.P., Platinum Equity Capital Partners-B III, L.P., Platinum Equity Capital Partners-C III, L.P. and PE Shay Holdings, LLC are filing a separate Form 3. Exhibit 24 - Power of Attorney. Platinum Equity, LLC By: /s/ Justin Maroldi, Assistant Secretary 2020-02-20 Platinum Equity Investment Holdings III Manager, LLC By: /s/ Justin Maroldi, Assistant Secretary 2020-02-20 Platinum Equity Investment Holdings III, LLC By: /s/ Justin Maroldi, Assistant Secretary 2020-02-20 Tom Gores By: /s/ Mary Ann Sigler, Attorney-in-Fact 2020-02-20