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Lumexa Imaging Holdings, Inc. (LMRI) outlines WCAS share holdings

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
3

Rhea-AI Filing Summary

Lumexa Imaging Holdings, Inc. filed an initial statement of beneficial ownership for Welsh, Carson, Anderson & Stowe–affiliated entities that are identified as both directors and 10% owners. These reporting persons disclose indirect holdings of Lumexa Imaging common stock through Common Units of Lumexa Imaging Equity Holdco, LLC (Holdings LLC), where each nine Common Units represent the right to acquire one share of common stock held by Holdings LLC.

The filing lists multiple blocks of common stock underlying these derivative securities, including 17,646,994 shares attributable to Welsh, Carson, Anderson & Stowe XII, L.P., 3,219,023 shares for Welsh, Carson, Anderson & Stowe XII Cayman, L.P., and 3,267,506 shares for WCAS Co-Invest Holdco, L.P. After Lumexa Imaging’s initial public offering and a 180-day lock-up period, Holdings LLC may distribute its common stock pro rata to remaining equity holders, at which time these indirect interests may be settled into Lumexa Imaging shares in connection with such a distribution.

Positive

  • None.

Negative

  • None.
Insider Welsh, Carson, Anderson & Stowe XII Cayman, L.P., Welsh, Carson, Anderson & Stowe XII Delaware II, L.P., Welsh, Carson, Anderson & Stowe XII Delaware, L.P., Welsh, Carson, Anderson & Stowe XII, L.P., WCAS XII Co-Investors LLC, WCAS - CO-INVEST HOLDCO, L.P., WCAS MANAGEMENT CORP, WCAS XII ASSOCIATES CAYMAN, L.P., WCAS XII ASSOCIATES LLC, WCAS CO-INVEST ASSOCIATES LLC
Role 10% Owner | 10% Owner | 10% Owner | 10% Owner | 10% Owner | 10% Owner | 10% Owner | 10% Owner | 10% Owner | 10% Owner
Type Security Shares Price Value
holding Common Units of Holdings LLC -- -- --
holding Common Units of Holdings LLC -- -- --
holding Common Units of Holdings LLC -- -- --
holding Common Units of Holdings LLC -- -- --
holding Common Units of Holdings LLC -- -- --
holding Common Units of Holdings LLC -- -- --
holding Common Units of Holdings LLC -- -- --
Holdings After Transaction: Common Units of Holdings LLC — 3,219,023 shares (Indirect, See Footnote)
Footnotes (1)
  1. Represents common units ("Common Units") of Lumexa Imaging Equity Holdco, LLC ("Holdings LLC") held by the Reporting Persons. Each nine Common Units represent the right to acquire one share of the Issuer's common stock ("Common Stock") held by Holdings LLC. After the closing of the Issuer's initial public offering ("IPO"), Holdings LLC may distribute all or a portion of the shares of the Common Stock it holds to its remaining equity holders on a pro rata basis, not earlier than the expiration of a 180-day lock-up period (a "Distribution"). Accordingly, the shares of Common Stock reported on this row represent shares of Common Stock that the Reporting Persons are entitled to receive in connection with a Distribution in exchange for their Common Units. Represents Welsh, Carson, Anderson & Stowe XII Cayman, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of Welsh, Carson, Anderson & Stowe XII Cayman, L.P. is WCAS XII Associates Cayman, L.P. The general partner of WCAS XII Associates Cayman, L.P. is WCAS XII Associates LLC. Represents Welsh, Carson, Anderson & Stowe XII Delaware II, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of Welsh, Carson, Anderson & Stowe XII Delaware II, L.P. is WCAS XII Associates LLC. Represents Welsh, Carson, Anderson & Stowe XII Delaware, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of Welsh, Carson, Anderson & Stowe XII Delaware, L.P. is WCAS XII Associates Cayman, L.P. The general partner of WCAS XII Associates Cayman, L.P. is WCAS XII Associates LLC. Represents Welsh, Carson, Anderson & Stowe XII, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of Welsh, Carson, Anderson & Stowe XII, L.P. is WCAS XII Associates LLC. Represents WCAS XII Co-Investors LLC's pro-rata interest in the shares of Common Stock held by Holdings LLC. Investment and voting decisions with respect to the shares held by WCAS XII Co-Investors LLC are made by a committee of managing members of WCAS XII Co-Investors LLC comprised of three or more individuals, including Brian Regan (who serves on the Issuer's board of directors). Each managing member of WCAS XII Co-Investors LLC disclaims beneficial ownership of the shares of Common Stock reported as beneficially owned by WCAS XII Co-Investors LLC except to the extent of his or her pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. Represents WCAS Co-Invest Holdco, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of WCAS Co-Invest Holdco, L.P. is WCAS Co-Invest Associates LLC. Investment and voting decisions with respect to the shares held by WCAS Co-Invest Holdco, L.P. are made by a committee of the managing members of WCAS Co-Invest Associates LLC comprised of three or more individuals, including Brian Regan (who serves on the Issuer's board of directors). Each managing member of WCAS Co-Invest Associates LLC disclaims beneficial ownership of the shares of Common Stock reported as beneficially owned by WCAS Co-Invest Holdco, L.P. except to the extent of his or her pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. Represents WCAS Management Corporation's pro-rata interest in the shares of Common Stock held by Holdings LLC. Investment and voting decisions with respect to the shares held by WCAS Management Corporation are made by a committee of the board of directors of WCAS Management Corporation comprised of three or more individuals, including Brian Regan (who serves on the Issuer's board of directors). Each member of the board of directors of WCAS Management Corporation disclaims beneficial ownership of the shares of Common Stock reported as beneficially owned by WCAS Management Corporation except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. Investment and voting decisions with respect to the shares held by Welsh, Carson, Anderson & Stowe XII Cayman, L.P., Welsh, Carson, Anderson & Stowe XII Delaware II, L.P., Welsh, Carson, Anderson & Stowe XII Delaware, L.P., and Welsh, Carson, Anderson & Stowe XII, L.P. are made by a committee of the managing members of WCAS XII Associates LLC comprised of three or more individuals, including Brian Regan (who serves on the Issuer's board of directors). [continues in footnote 10] [continued from footnote 9] Each managing member of WCAS XII Associates LLC disclaims beneficial ownership of the shares of Common Stock reported as beneficially owned by Welsh, Carson, Anderson & Stowe XII Cayman, L.P., Welsh, Carson, Anderson & Stowe XII Delaware II, L.P., Welsh, Carson, Anderson & Stowe XII Delaware, L.P., and Welsh, Carson, Anderson & Stowe XII, L.P. except to the extent of his or her pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
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SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0104
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person*
Welsh, Carson, Anderson & Stowe XII Cayman, L.P.

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
12/11/2025
3. Issuer Name and Ticker or Trading Symbol
Lumexa Imaging Holdings, Inc. [ LMRI ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Common Units of Holdings LLC(1) (1) (1) Common Stock 3,219,023 (1) I See Footnote(2)(9)(10)
Common Units of Holdings LLC(1) (1) (1) Common Stock 516,607 (1) I See Footnote(3)(9)(10)
Common Units of Holdings LLC(1) (1) (1) Common Stock 3,110,167 (1) I See Footnote(4)(9)(10)
Common Units of Holdings LLC(1) (1) (1) Common Stock 17,646,994 (1) I See Footnote(5)(9)(10)
Common Units of Holdings LLC(1) (1) (1) Common Stock 232,267 (1) I See Footnote(6)
Common Units of Holdings LLC(1) (1) (1) Common Stock 3,267,506 (1) I See Footnote(7)
Common Units of Holdings LLC(1) (1) (1) Common Stock 49,013 (1) I See Footnote(8)
1. Name and Address of Reporting Person*
Welsh, Carson, Anderson & Stowe XII Cayman, L.P.

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
Welsh, Carson, Anderson & Stowe XII Delaware II, L.P.

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
Welsh, Carson, Anderson & Stowe XII Delaware, L.P.

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
Welsh, Carson, Anderson & Stowe XII, L.P.

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
WCAS XII Co-Investors LLC

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
WCAS - CO-INVEST HOLDCO, L.P.

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
WCAS MANAGEMENT CORP

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
WCAS XII ASSOCIATES CAYMAN, L.P.

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
WCAS XII ASSOCIATES LLC

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
WCAS CO-INVEST ASSOCIATES LLC

(Last) (First) (Middle)
C/O WELSH, CARSON, ANDERSON AND STOWE
599 LEXINGTON AVENUE, SUITE 1800

(Street)
NEW YORK NY 10022

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
Explanation of Responses:
1. Represents common units ("Common Units") of Lumexa Imaging Equity Holdco, LLC ("Holdings LLC") held by the Reporting Persons. Each nine Common Units represent the right to acquire one share of the Issuer's common stock ("Common Stock") held by Holdings LLC. After the closing of the Issuer's initial public offering ("IPO"), Holdings LLC may distribute all or a portion of the shares of the Common Stock it holds to its remaining equity holders on a pro rata basis, not earlier than the expiration of a 180-day lock-up period (a "Distribution"). Accordingly, the shares of Common Stock reported on this row represent shares of Common Stock that the Reporting Persons are entitled to receive in connection with a Distribution in exchange for their Common Units.
2. Represents Welsh, Carson, Anderson & Stowe XII Cayman, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of Welsh, Carson, Anderson & Stowe XII Cayman, L.P. is WCAS XII Associates Cayman, L.P. The general partner of WCAS XII Associates Cayman, L.P. is WCAS XII Associates LLC.
3. Represents Welsh, Carson, Anderson & Stowe XII Delaware II, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of Welsh, Carson, Anderson & Stowe XII Delaware II, L.P. is WCAS XII Associates LLC.
4. Represents Welsh, Carson, Anderson & Stowe XII Delaware, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of Welsh, Carson, Anderson & Stowe XII Delaware, L.P. is WCAS XII Associates Cayman, L.P. The general partner of WCAS XII Associates Cayman, L.P. is WCAS XII Associates LLC.
5. Represents Welsh, Carson, Anderson & Stowe XII, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of Welsh, Carson, Anderson & Stowe XII, L.P. is WCAS XII Associates LLC.
6. Represents WCAS XII Co-Investors LLC's pro-rata interest in the shares of Common Stock held by Holdings LLC. Investment and voting decisions with respect to the shares held by WCAS XII Co-Investors LLC are made by a committee of managing members of WCAS XII Co-Investors LLC comprised of three or more individuals, including Brian Regan (who serves on the Issuer's board of directors). Each managing member of WCAS XII Co-Investors LLC disclaims beneficial ownership of the shares of Common Stock reported as beneficially owned by WCAS XII Co-Investors LLC except to the extent of his or her pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
7. Represents WCAS Co-Invest Holdco, L.P.'s pro-rata interest in the shares of Common Stock held by Holdings LLC. The general partner of WCAS Co-Invest Holdco, L.P. is WCAS Co-Invest Associates LLC. Investment and voting decisions with respect to the shares held by WCAS Co-Invest Holdco, L.P. are made by a committee of the managing members of WCAS Co-Invest Associates LLC comprised of three or more individuals, including Brian Regan (who serves on the Issuer's board of directors). Each managing member of WCAS Co-Invest Associates LLC disclaims beneficial ownership of the shares of Common Stock reported as beneficially owned by WCAS Co-Invest Holdco, L.P. except to the extent of his or her pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
8. Represents WCAS Management Corporation's pro-rata interest in the shares of Common Stock held by Holdings LLC. Investment and voting decisions with respect to the shares held by WCAS Management Corporation are made by a committee of the board of directors of WCAS Management Corporation comprised of three or more individuals, including Brian Regan (who serves on the Issuer's board of directors). Each member of the board of directors of WCAS Management Corporation disclaims beneficial ownership of the shares of Common Stock reported as beneficially owned by WCAS Management Corporation except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
9. Investment and voting decisions with respect to the shares held by Welsh, Carson, Anderson & Stowe XII Cayman, L.P., Welsh, Carson, Anderson & Stowe XII Delaware II, L.P., Welsh, Carson, Anderson & Stowe XII Delaware, L.P., and Welsh, Carson, Anderson & Stowe XII, L.P. are made by a committee of the managing members of WCAS XII Associates LLC comprised of three or more individuals, including Brian Regan (who serves on the Issuer's board of directors). [continues in footnote 10]
10. [continued from footnote 9] Each managing member of WCAS XII Associates LLC disclaims beneficial ownership of the shares of Common Stock reported as beneficially owned by Welsh, Carson, Anderson & Stowe XII Cayman, L.P., Welsh, Carson, Anderson & Stowe XII Delaware II, L.P., Welsh, Carson, Anderson & Stowe XII Delaware, L.P., and Welsh, Carson, Anderson & Stowe XII, L.P. except to the extent of his or her pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
Welsh, Carson, Anderson & Stowe XII Cayman, L.P., By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
Welsh, Carson, Anderson & Stowe XII Delaware II, L.P., By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
Welsh, Carson, Anderson & Stowe XII Delaware, L.P., By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
Welsh, Carson, Anderson & Stowe XII, L.P., By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
WCAS XII Co-Investors LLC, By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
WCAS-Co-Invest HoldCo, L.P., By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
WCAS Management Corporation, By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
WCAS XII Associates Cayman, L.P., By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
WCAS XII Associates LLC, By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
WCAS Co-Invest Associates LLC, By: /s/ Jennifer Martin, Authorized Signatory 12/11/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider ownership does the WCAS group report in Lumexa Imaging Holdings, Inc. (LMRI)?

The Welsh, Carson, Anderson & Stowe–affiliated entities report indirect beneficial ownership of Lumexa Imaging common stock through Common Units of Lumexa Imaging Equity Holdco, LLC (Holdings LLC). Each nine Common Units represent the right to acquire one share of Lumexa Imaging common stock held by Holdings LLC, giving these entities exposure to multiple large share blocks.

How are Holdings LLC Common Units linked to LMRI common stock?

According to the filing, each nine Common Units of Lumexa Imaging Equity Holdco, LLC represent the right to acquire one share of Lumexa Imaging Holdings, Inc. common stock held by Holdings LLC. These units are reported as derivative securities that can result in Lumexa Imaging shares being received in connection with a qualifying distribution.

When could the WCAS entities receive Lumexa Imaging (LMRI) shares directly?

After the closing of Lumexa Imaging’s initial public offering, Holdings LLC may distribute all or a portion of the common stock it holds to its remaining equity holders on a pro rata basis, but not earlier than the expiration of a 180-day lock-up period. The shares reported represent Lumexa Imaging common stock the reporting persons are entitled to receive in such a distribution in exchange for their Common Units.

Which Welsh, Carson, Anderson & Stowe entities are named as reporting persons for LMRI?

Named reporting persons include Welsh, Carson, Anderson & Stowe XII Cayman, L.P., Welsh, Carson, Anderson & Stowe XII Delaware II, L.P., Welsh, Carson, Anderson & Stowe XII Delaware, L.P., Welsh, Carson, Anderson & Stowe XII, L.P., WCAS XII Co-Investors LLC, WCAS Co-Invest Holdco, L.P., WCAS Management Corporation, WCAS XII Associates Cayman, L.P., WCAS XII Associates LLC, and WCAS Co-Invest Associates LLC.

What are some of the largest Lumexa Imaging share blocks reported in this insider filing?

The filing shows several large blocks of Lumexa Imaging common stock underlying Holdings LLC Common Units, including 17,646,994 shares attributable to Welsh, Carson, Anderson & Stowe XII, L.P., 3,219,023 shares for Welsh, Carson, Anderson & Stowe XII Cayman, L.P., and 3,267,506 shares for WCAS Co-Invest Holdco, L.P., along with several smaller positions.

Do the WCAS managers and directors fully admit beneficial ownership of all reported LMRI shares?

No. The filing states repeatedly that the managing members and board members of the various WCAS entities disclaim beneficial ownership of the Lumexa Imaging common stock beyond their respective pecuniary interests. It further notes that including these securities in the report shall not be deemed an admission of beneficial ownership for Section 16 or other purposes.