X0609 4 2026-06-05 0002096300 AEVEX Corp. AVEX 0001181100 MADISON DEARBORN PARTNERS LLC false C/O MADISON DEARBORN PARTNERS, LLC 70 W. MADISON STREET, SUITE 4600 CHICAGO IL 60602 false false true false 0001632184 MADISON DEARBORN CAPITAL PARTNERS VII-B, L.P. false C/O MADISON DEARBORN PARTNERS, LLC 70 W. MADISON STREET, SUITE 4600 CHICAGO IL 60602 false false true false 0001632190 MADISON DEARBORN CAPITAL PARTNERS VII EXECUTIVE-B, L.P. false C/O MADISON DEARBORN PARTNERS, LLC 70 W. MADISON STREET, SUITE 4600 CHICAGO IL 60602 false false true false 0001632188 MADISON DEARBORN CAPITAL PARTNERS VII-C, L.P. false C/O MADISON DEARBORN PARTNERS, LLC 70 W. MADISON STREET, SUITE 4600 CHICAGO IL 60602 false false true false false Class A Common Stock 2026-06-05 4 S false 2273843 25.99 D 22861457 I See footnotes. Class A Common Stock 2026-06-05 4 J false 2611 D 22858846 I See footnotes. Class B Common Stock 2026-06-05 4 D false 4757448 D 58540076 I See footnotes. Class B Common Stock 2026-06-05 4 J false 975246 D 57564830 I See footnotes. Series B Units 2026-06-05 4 D false 4757448 D Class A Common Stock 4757448 58540076 I See footnotes. Series B Units 2026-06-05 4 J false 975246 D Class A Common Stock 975246 57564830 I See footnotes. In connection with the offering as described in the Issuer's Registration Statement on Form S-1 (Registration No. 333-296396) (the "Offering"), the following transactions have occurred regarding this Statement's reported Class A common stock of the Issuer ("Class A Shares"): (i) ATS PubCo Holdings, L.P. ("ATS PubCo Holdings") sold 9,341 Class A Shares and ATS PubCo Seller Holdings, LLC sold 2,264,502 Class A Shares to the underwriters at a net offering price of $25.99 and (ii) ATS PubCo Holdings distributed 2,611 Class A Shares in a pro rata distribution to its limited partners for no consideration. Following the transactions discussed in footnote 1, (i) ATS PubCo Holdings directly holds 22,694,184 Class A Shares and (ii) ATS Management Holdings, LLC ("ATS Management Holdings") directly holds 164,662 Class A Shares. Both ATS PubCo Holdings and ATS Management Holdings are controlled by Madison Dearborn Capital Partners VII-B, L.P., Madison Dearborn Capital Partners VII Executive-B, L.P. and Madison Dearborn Capital Partners VII-C, LP (collectively, the "MDP Funds"). The ultimate general partner of each of the MDP Funds is Madison Dearborn Partners, LLC. Paul J. Finnegan and Vahe A. Dombalagian are the sole members of the board of managers of Madison Dearborn Partners, LLC, which has the power to vote or dispose of the securities held by the MDP Funds. By virtue of the relationships described herein, each of the reporting persons may be deemed to beneficially own the securities reported hereby. Each of the reporting persons disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein. In connection with the Offering, the following transactions have occurred regarding this Statement's reported Class B common stock of the Issuer ("Class B Shares") and Series B Units of Athena Technology Solutions Holdings, LLC ("Series B Units"): (i) ATS Investment Holdings, LLC ("ATS Investment Holdings") distributed 5,732,694 Class B Shares and corresponding Series B Units in a pro rata distribution to its members, including certain entities controlled by the MDP Funds, for no consideration and (ii) following such distribution, the MDP Funds sold 4,757,448 Series B Units, received by such entities controlled by the MDP Funds in such distribution, at a net offering price of $25.99 per unit to the Issuer (together with the corresponding Class B Shares for no additional consideration). Following the transactions discussed in footnote 4, (i) ATS Investment Holdings directly holds 57,153,106 Class B Shares and corresponding Series B Units and (ii) ATS Management Holdings directly holds 411,724 Class B Shares and corresponding Series B Units. Both ATS Investment Holdings and ATS Management Holdings are controlled by the MDP Funds. Series B Units are exchangeable (together with an equal number of Class B Shares) for Class A Shares on a one-for-one basis. Series B Units do not expire. /s/ Katherine M. Bryan, Director, Associate General Counsel and Chief Compliance Officer of Madison Dearborn Partners, LLC 2026-06-05 /s/ Katherine M. Bryan, Director, Associate General Counsel and Chief Compliance Officer of the General Partner of the General Partner of Madison Dearborn Capital Partners VII-B, L.P. 2026-06-05 /s/ Katherine M. Bryan, Director, Associate General Counsel and Chief Compliance Officer Managing Director of the General Partner of the General Partner of Madison Dearborn Capital Partners VII Executive-B, L.P. 2026-06-05 /s/ Katherine M. Bryan, Director, Associate General Counsel and Chief Compliance Officer Managing Director of the General Partner of the General Partner of Madison Dearborn Capital Partners VII-C, LP 2026-06-05