MADISON DEARBORN PARTNERS LLC - 05 Jun 2026 Form 4 Insider Report for AEVEX Corp. (AVEX)

Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
4
Accepted by SEC
08 Jun 2026, 17:22:10 UTC
Prior SEC filing
17 Apr 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Katherine M. Bryan, Director, Associate General Counsel and Chief Compliance Officer of Madison Dearborn Partners, LLC

Key filing fact

MADISON DEARBORN PARTNERS LLC filed Form 4 for AEVEX Corp. (AVEX) on 08 Jun 2026.

Key facts

  • This page summarizes MADISON DEARBORN PARTNERS LLC's Form 4 filing for AEVEX Corp. (AVEX).
  • 6 reported transactions and 8 derivative rows are listed below.
  • Accepted by SEC: 08 Jun 2026, 17:22.

Change

  • Previous filing in this sequence was filed on 17 Apr 2026.
  • Current net transaction value: -$59,097,180.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (4)

CIK 0001181100 Primary reporting owner

MADISON DEARBORN PARTNERS LLC

Relationship
10%+ Owner
Address
C/O MADISON DEARBORN PARTNERS, LLC, 70 W. MADISON STREET, SUITE 4600, CHICAGO
Signature
/s/ Katherine M. Bryan, Director, Associate General Counsel and Chief Compliance Officer of Madison Dearborn Partners, LLC
Signature date
05 Jun 2026
CIK 0001632184

MADISON DEARBORN CAPITAL PARTNERS VII-B, L.P.

Relationship
10%+ Owner
Address
C/O MADISON DEARBORN PARTNERS, LLC, 70 W. MADISON STREET, SUITE 4600, CHICAGO
Signature
/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.
Signature date
05 Jun 2026
CIK 0001632190

MADISON DEARBORN CAPITAL PARTNERS VII EXECUTIVE-B, L.P.

Relationship
10%+ Owner
Address
C/O MADISON DEARBORN PARTNERS, LLC, 70 W. MADISON STREET, SUITE 4600, CHICAGO
Signature
/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.
Signature date
05 Jun 2026
CIK 0001632188

MADISON DEARBORN CAPITAL PARTNERS VII-C, L.P.

Relationship
10%+ Owner
Address
C/O MADISON DEARBORN PARTNERS, LLC, 70 W. MADISON STREET, SUITE 4600, CHICAGO
Signature
/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
Signature date
05 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AVEX transaction

Class A Common Stock

Sale

Transaction value
$59,097,180
Shares
-2,273,843
Change %
-9%
Price
$25.99
Shares after
22,861,457
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F1, F2, F3
AVEX transaction

Class A Common Stock

Sale

Transaction value
$59,097,180
Shares
-2,273,843
Change %
-9%
Price
$25.99
Shares after
22,861,457
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F1, F2, F3
AVEX transaction

Class A Common Stock

Sale

Transaction value
$59,097,180
Shares
-2,273,843
Change %
-9%
Price
$25.99
Shares after
22,861,457
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F1, F2, F3
AVEX transaction

Class A Common Stock

Sale

Transaction value
$59,097,180
Shares
-2,273,843
Change %
-9%
Price
$25.99
Shares after
22,861,457
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F1, F2, F3
AVEX transaction

Class A Common Stock

Other

Transaction value
Shares
-2,611
Change %
-0.01%
Price
Shares after
22,858,846
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F1, F2, F3
AVEX transaction

Class A Common Stock

Other

Transaction value
Shares
-2,611
Change %
-0.01%
Price
Shares after
22,858,846
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F1, F2, F3
AVEX transaction

Class A Common Stock

Other

Transaction value
Shares
-2,611
Change %
-0.01%
Price
Shares after
22,858,846
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F1, F2, F3
AVEX transaction

Class A Common Stock

Other

Transaction value
Shares
-2,611
Change %
-0.01%
Price
Shares after
22,858,846
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F1, F2, F3
AVEX transaction

Class B Common Stock

Disposed to Issuer

Transaction value
Shares
-4,757,448
Change %
-7.5%
Price
Shares after
58,540,076
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F3, F4, F5
AVEX transaction

Class B Common Stock

Disposed to Issuer

Transaction value
Shares
-4,757,448
Change %
-7.5%
Price
Shares after
58,540,076
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F3, F4, F5
AVEX transaction

Class B Common Stock

Disposed to Issuer

Transaction value
Shares
-4,757,448
Change %
-7.5%
Price
Shares after
58,540,076
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F3, F4, F5
AVEX transaction

Class B Common Stock

Disposed to Issuer

Transaction value
Shares
-4,757,448
Change %
-7.5%
Price
Shares after
58,540,076
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F3, F4, F5
AVEX transaction

Class B Common Stock

Other

Transaction value
Shares
-975,246
Change %
-1.7%
Price
Shares after
57,564,830
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F3, F4, F5
AVEX transaction

Class B Common Stock

Other

Transaction value
Shares
-975,246
Change %
-1.7%
Price
Shares after
57,564,830
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F3, F4, F5
AVEX transaction

Class B Common Stock

Other

Transaction value
Shares
-975,246
Change %
-1.7%
Price
Shares after
57,564,830
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F3, F4, F5
AVEX transaction

Class B Common Stock

Other

Transaction value
Shares
-975,246
Change %
-1.7%
Price
Shares after
57,564,830
Date
05 Jun 2026
Ownership
See footnotes.
Footnotes
F3, F4, F5

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AVEX transaction Derivative

Series B Units

Disposed to Issuer

Transaction value
Shares
-4,757,448
Change %
-7.5%
Price
Shares after
58,540,076
Date
05 Jun 2026
Ownership
See footnotes.
Underlying class
Class A Common Stock
Underlying amount
4,757,448
Exercise price
Footnotes
F3, F4, F5, F6
AVEX transaction Derivative

Series B Units

Disposed to Issuer

Transaction value
Shares
-4,757,448
Change %
-7.5%
Price
Shares after
58,540,076
Date
05 Jun 2026
Ownership
See footnotes.
Underlying class
Class A Common Stock
Underlying amount
4,757,448
Exercise price
Footnotes
F3, F4, F5, F6
AVEX transaction Derivative

Series B Units

Disposed to Issuer

Transaction value
Shares
-4,757,448
Change %
-7.5%
Price
Shares after
58,540,076
Date
05 Jun 2026
Ownership
See footnotes.
Underlying class
Class A Common Stock
Underlying amount
4,757,448
Exercise price
Footnotes
F3, F4, F5, F6
AVEX transaction Derivative

Series B Units

Disposed to Issuer

Transaction value
Shares
-4,757,448
Change %
-7.5%
Price
Shares after
58,540,076
Date
05 Jun 2026
Ownership
See footnotes.
Underlying class
Class A Common Stock
Underlying amount
4,757,448
Exercise price
Footnotes
F3, F4, F5, F6
AVEX transaction Derivative

Series B Units

Other

Transaction value
Shares
-975,246
Change %
-1.7%
Price
Shares after
57,564,830
Date
05 Jun 2026
Ownership
See footnotes.
Underlying class
Class A Common Stock
Underlying amount
975,246
Exercise price
Footnotes
F3, F4, F5, F6
AVEX transaction Derivative

Series B Units

Other

Transaction value
Shares
-975,246
Change %
-1.7%
Price
Shares after
57,564,830
Date
05 Jun 2026
Ownership
See footnotes.
Underlying class
Class A Common Stock
Underlying amount
975,246
Exercise price
Footnotes
F3, F4, F5, F6
AVEX transaction Derivative

Series B Units

Other

Transaction value
Shares
-975,246
Change %
-1.7%
Price
Shares after
57,564,830
Date
05 Jun 2026
Ownership
See footnotes.
Underlying class
Class A Common Stock
Underlying amount
975,246
Exercise price
Footnotes
F3, F4, F5, F6
AVEX transaction Derivative

Series B Units

Other

Transaction value
Shares
-975,246
Change %
-1.7%
Price
Shares after
57,564,830
Date
05 Jun 2026
Ownership
See footnotes.
Underlying class
Class A Common Stock
Underlying amount
975,246
Exercise price
Footnotes
F3, F4, F5, F6
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

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.

Footnote F2

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").

Footnote F3

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.

Footnote F4

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).

Footnote F5

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.

Footnote F6

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.

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