CDNL

SEC source: 0001213900-26-091325 · ownership.xml · nonDerivative · entry 1

Wimmer Richard Bennett · CIK 0002092871 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,349

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $39.00 to $39.29, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4.

SEC source: 0001213900-26-090858 · ownership.xml · nonDerivative · entry 2

Lee Richard Melvin Jr. · CIK 0002092630 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,254

F2 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $37.51 to $37.74, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) of this Form 4

SEC source: 0001213900-26-090858 · ownership.xml · nonDerivative · entry 1

Lee Richard Melvin Jr. · CIK 0002092630 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,254

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $36.26 to $37.22, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4.

SEC source: 0001213900-26-090856 · ownership.xml · nonDerivative · entry 1

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,000

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $36.27 to $36.55, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4..

SEC source: 0001213900-26-090855 · ownership.xml · nonDerivative · entry 2

Wood Anthony Leon Jr. · CIK 0002127585 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,400

F2 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $39.54 to $40.12, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) of this Form 4.

SEC source: 0001213900-26-090855 · ownership.xml · nonDerivative · entry 1

Wood Anthony Leon Jr. · CIK 0002127585 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,019

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $38.54 to $39.53, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4.

SEC source: 0001213900-26-090854 · ownership.xml · nonDerivative · entry 4

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,350

F4 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $39.47 to $40.09, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (4) of this Form 4.

SEC source: 0001213900-26-090854 · ownership.xml · nonDerivative · entry 3

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,839

F3 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $38.47 to $39.46, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (3) of this Form 4.

SEC source: 0001213900-26-090854 · ownership.xml · nonDerivative · entry 2

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,590

F2 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $37.30 to $38.28, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) of this Form 4.

SEC source: 0001213900-26-090854 · ownership.xml · nonDerivative · entry 1

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,366

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $36.19 to $37.12, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4.

SEC source: 0001213900-26-090852 · ownership.xml · nonDerivative · entry 1

Zelman Ivy · CIK 0001856646 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,891

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $39.45 to $39.81, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4.

SEC source: 0001213900-26-090850 · ownership.xml · nonDerivative · entry 2

Wood Benjamin · CIK 0002123683 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,700

F2 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $39.60 to $40.00, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) of this Form 4.

SEC source: 0001213900-26-090850 · ownership.xml · nonDerivative · entry 1

Wood Benjamin · CIK 0002123683 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,627

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $38.60 to $39.59, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4.

SEC source: 0001213900-26-066855 · ownership.xml · nonDerivative · entry 1

Zelman Ivy · CIK 0001856646 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,244

F1 · price: These shares represent restricted stock units ("RSUs") granted on June 5, 2026. The RSUs vest on the earlier to occur of (1) the next annual meeting of the Company's stockholders following the date of grant (so long as such next annual meeting is at least 50 weeks after the immediately preceding year's annual meeting of stockholders) and (2) the one-year anniversary of the date of grant, provided that, in each case, the Reporting Person continues to serve as a director of the Company through such date.

SEC source: 0001213900-26-066857 · ownership.xml · nonDerivative · entry 1

Lee Richard Melvin Jr. · CIK 0002092630 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,254

F1 · price: These shares represent restricted stock units ("RSUs") granted on June 5, 2026. The RSUs vest on the earlier to occur of (1) the next annual meeting of the Company's stockholders following the date of grant (so long as such next annual meeting is at least 50 weeks after the immediately preceding year's annual meeting of stockholders) and (2) the one-year anniversary of the date of grant, provided that, in each case, the Reporting Person continues to serve as a director of the Company through such date.

F2 · balance_after: The Form 4 filed by the Reporting Person on May 11, 2026 incorrectly reported the Amount of Securities Beneficially Owned following Reported Transaction in Column 5 of Table I. The correct number should have been 32,313.

SEC source: 0001213900-26-066856 · ownership.xml · nonDerivative · entry 1

SHANFELTER AUSTIN J · CIK 0001221430 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,529

F1 · price: These shares represent restricted stock units ("RSUs") granted on June 5, 2026. The RSUs vest on the earlier to occur of (1) the next annual meeting of the Company's stockholders following the date of grant (so long as such next annual meeting is at least 50 weeks after the immediately preceding year's annual meeting of stockholders) and (2) the one-year anniversary of the date of grant, provided that, in each case, the Reporting Person continues to serve as a director of the Company through such date.

F2 · balance_after: The Form 4 filed by the Reporting Person on May 11, 2026 incorrectly reported the Amount of Securities Beneficially Owned following Reported Transaction in Column 5 of Table I. The correct number should have been 9,588.

SEC source: 0001213900-26-066854 · ownership.xml · nonDerivative · entry 1

Wimmer Richard Bennett · CIK 0002092871 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,849

F1 · price: These shares represent restricted stock units ("RSUs") granted on June 5, 2026. The RSUs vest on the earlier to occur of (1) the next annual meeting of the Company's stockholders following the date of grant (so long as such next annual meeting is at least 50 weeks after the immediately preceding year's annual meeting of stockholders) and (2) the one-year anniversary of the date of grant, provided that, in each case, the Reporting Person continues to serve as a director of the Company through such date.

SEC source: 0001213900-26-062942 · ownership.xml · nonDerivative · entry 5

Wood Benjamin · CIK 0002123683 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

SEC source: 0001213900-26-062942 · ownership.xml · nonDerivative · entry 4

Wood Benjamin · CIK 0002123683 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,900

F4 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $53.31 to $54.30, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (4) of this Form 4.

SEC source: 0001213900-26-062942 · ownership.xml · nonDerivative · entry 3

Wood Benjamin · CIK 0002123683 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,300

F3 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $51.42 to $52.37, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (3) of this Form 4.

SEC source: 0001213900-26-062942 · ownership.xml · nonDerivative · entry 2

Wood Benjamin · CIK 0002123683 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,094

F2 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $50.36 to $51.35, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) of this Form 4.

SEC source: 0001213900-26-062942 · ownership.xml · nonDerivative · entry 1

Wood Benjamin · CIK 0002123683 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,739

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $49.32 to $50.31, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4.

SEC source: 0001213900-26-054545 · ownership.xml · nonDerivative · entry 1

Lee Richard Melvin Jr. · CIK 0002092630 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,826

F1 · price: These shares represent restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest as follows, subject to the Reporting Person's continued service through each applicable vesting date: (i) 775 RSUs vested immediately upon execution of the award agreement; (ii) 775 RSUs will vest on June 30, 2026; (iii) 775 RSUs will vest on September 30, 2026; and (iv) 776 RSUs will vest on December 31, 2026.

SEC source: 0001213900-26-054546 · ownership.xml · nonDerivative · entry 1

Zelman Ivy · CIK 0001856646 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,427

F1 · price: These shares represent restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest as follows, subject to the Reporting Person's continued service through each applicable vesting date: (i) 775 RSUs vested immediately upon execution of the award agreement; (ii) 775 RSUs will vest on June 30, 2026; (iii) 775 RSUs will vest on September 30, 2026; and (iv) 776 RSUs will vest on December 31, 2026.

SEC source: 0001213900-26-054544 · ownership.xml · nonDerivative · entry 1

SHANFELTER AUSTIN J · CIK 0001221430 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,726

F1 · price: These shares represent restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest as follows, subject to the Reporting Person's continued service through each applicable vesting date: (i) 775 RSUs vested immediately upon execution of the award agreement; (ii) 775 RSUs will vest on June 30, 2026; (iii) 775 RSUs will vest on September 30, 2026; and (iv) 776 RSUs will vest on December 31, 2026.

SEC source: 0001213900-26-054547 · ownership.xml · nonDerivative · entry 1

Wimmer Richard Bennett · CIK 0002092871 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,826

F1 · price: These shares represent restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest as follows, subject to the Reporting Person's continued service through each applicable vesting date: (i) 775 RSUs vested immediately upon execution of the award agreement; (ii) 775 RSUs will vest on June 30, 2026; (iii) 775 RSUs will vest on September 30, 2026; and (iv) 776 RSUs will vest on December 31, 2026.

SEC source: 0001213900-26-035634 · ownership.xml · nonDerivative · entry 1

Zelman Ivy · CIK 0001856646 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,326

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $36.09 to $36.47, inclusive. The reporting person hereby undertakes to provide to Cardinal Infrastructure Group Inc., any security holder of Cardinal Infrastructure Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) of this Form 4.

SEC source: 0001213900-25-120816 · ownership.xml · nonDerivative · entry 1

Wimmer Richard Bennett · CIK 0002092871 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,725

F1 · shares: The shares of Common Stock reported on this Form 4 are subject to a lock-up agreement, effective as of 12/9/2025 (the "Lock-up Date"), between the Reporting Person and Stifel, Nicolaus & Company, Incorporated and William Blair & Company, L.L.C, pursuant to which shares of Common Stock reported herein cannot be sold for 180 days following the Lock-up Date.

SEC source: 0001213900-25-120815 · ownership.xml · nonDerivative · entry 1

Lee Richard Melvin Jr. · CIK 0002092630 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,212

F1 · shares: The shares of Common Stock reported on this Form 4 are subject to a lock-up agreement, effective as of 12/9/2025 (the "Lock-up Date"), between the Reporting Person and Stifel, Nicolaus & Company, Incorporated and William Blair & Company, L.L.C, pursuant to which shares of Common Stock reported herein cannot be sold for 180 days following the Lock-up Date.

SEC source: 0001213900-25-120814 · ownership.xml · nonDerivative · entry 1

Zelman Ivy · CIK 0001856646 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,405

F1 · shares: The shares of Common Stock reported on this Form 4 are subject to a lock-up agreement, effective as of 12/9/2025 (the "Lock-up Date"), between the Reporting Person and Stifel, Nicolaus & Company, Incorporated and William Blair & Company, L.L.C, pursuant to which shares of Common Stock reported herein cannot be sold for 180 days following the Lock-up Date.

SEC source: 0001213900-25-120813 · ownership.xml · nonDerivative · entry 1

Gidley Tiffany Leann · CIK 0002091840 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,000

F1 · shares: The shares of Common Stock reported on this Form 4 are subject to a lock-up agreement, effective as of 12/9/2025 (the "Lock-up Date"), between the Reporting Person and Stifel, Nicolaus & Company, Incorporated and William Blair & Company, L.L.C, pursuant to which shares of Common Stock reported herein cannot be sold for 180 days following the Lock-up Date.

SEC source: 0001213900-25-120812 · ownership.xml · derivative · entry 8

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Rowe Family Irrevocable Trust dated March 13, 2024

Disclosed balance after: 203,617

Underlying: Class A Common Stock · 66,071 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of The Rowe Family Irrevocable Trust dated March 13, 2024 ("Rowe Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Rowe Trust.

SEC source: 0001213900-25-120812 · ownership.xml · derivative · entry 6

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,834,386

Underlying: Class A Common Stock · 595,238 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

SEC source: 0001213900-25-120812 · ownership.xml · nonDerivative · entry 4

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Rowe Family Irrevocable Trust dated March 13, 2024

Disclosed balance after: 203,617

F2 · price: Reflects the cancellation for no consideration of Class B Common Stock in connection with the redemption of the membership units of Cardinal Civil Contracting Holdings LLC (the "LLC Units").

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of The Rowe Family Irrevocable Trust dated March 13, 2024 ("Rowe Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Rowe Trust.

SEC source: 0001213900-25-120812 · ownership.xml · nonDerivative · entry 2

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,834,386

F2 · price: Reflects the cancellation for no consideration of Class B Common Stock in connection with the redemption of the membership units of Cardinal Civil Contracting Holdings LLC (the "LLC Units").

SEC source: 0001213900-25-120811 · ownership.xml · derivative · entry 8

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spivey Family 2024 Irrevocable Trust U/A dated 5/13/24, as amended

Disclosed balance after: 2,050,844

Underlying: Class A Common Stock · 665,476 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of Spivey Family 2024 Irrevocable Trust U/A dated 5/13/24, as amended ("Spivey Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Spivey Trust.

SEC source: 0001213900-25-120811 · ownership.xml · derivative · entry 6

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,179,004

Underlying: Class A Common Stock · 3,302,980 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

SEC source: 0001213900-25-120811 · ownership.xml · nonDerivative · entry 4

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spivey Family 2024 Irrevocable Trust U/A dated 5/13/24, as amended

Disclosed balance after: 2,050,844

F2 · price: Reflects the cancellation for no consideration of Class B Common Stock in connection with the redemption of the membership units of Cardinal Civil Contracting Holdings LLC (the "LLC Units").

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of Spivey Family 2024 Irrevocable Trust U/A dated 5/13/24, as amended ("Spivey Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Spivey Trust.

SEC source: 0001213900-25-120811 · ownership.xml · nonDerivative · entry 2

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,179,004

F2 · price: Reflects the cancellation for no consideration of Class B Common Stock in connection with the redemption of the membership units of Cardinal Civil Contracting Holdings LLC (the "LLC Units").

SEC source: 0001213900-25-120810 · ownership.xml · derivative · entry 8

West Erik Daniel · CIK 0002099974 · See Remarks · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By West Family 2024 Irrevocable Trust U/A dated 3/20/24, as amended

Disclosed balance after: 1,018,084

Underlying: Class A Common Stock · 330,357 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of West Family 2024 Irrevocable Trust U/A dated 3/20/24, as amended ("West Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by West Trust.

SEC source: 0001213900-25-120810 · ownership.xml · derivative · entry 6

West Erik Daniel · CIK 0002099974 · See Remarks · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,095,925

Underlying: Class A Common Stock · 1,653,571 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

SEC source: 0001213900-25-120810 · ownership.xml · nonDerivative · entry 4

West Erik Daniel · CIK 0002099974 · See Remarks · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By West Family 2024 Irrevocable Trust U/A dated 3/20/24, as amended

Disclosed balance after: 1,018,084

F2 · price: Reflects the cancellation for no consideration of Class B Common Stock in connection with the redemption of the membership units of Cardinal Civil Contracting Holdings LLC (the "LLC Units").

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of West Family 2024 Irrevocable Trust U/A dated 3/20/24, as amended ("West Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by West Trust.

SEC source: 0001213900-25-120810 · ownership.xml · nonDerivative · entry 2

West Erik Daniel · CIK 0002099974 · See Remarks · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,095,925

F2 · price: Reflects the cancellation for no consideration of Class B Common Stock in connection with the redemption of the membership units of Cardinal Civil Contracting Holdings LLC (the "LLC Units").

SEC source: 0001213900-25-120812 · ownership.xml · derivative · entry 7

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Rowe Family Irrevocable Trust dated March 13, 2024

Disclosed balance after: 269,688

Underlying: Class A Common Stock · 269,688 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F1 · kind: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F1 · price: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of The Rowe Family Irrevocable Trust dated March 13, 2024 ("Rowe Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Rowe Trust.

SEC source: 0001213900-25-120812 · ownership.xml · derivative · entry 5

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,429,624

Underlying: Class A Common Stock · 2,429,624 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F1 · kind: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F1 · price: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

SEC source: 0001213900-25-120812 · ownership.xml · nonDerivative · entry 3

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Rowe Family Irrevocable Trust dated March 13, 2024

Disclosed balance after: 269,688

F1 · kind: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F1 · price: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of The Rowe Family Irrevocable Trust dated March 13, 2024 ("Rowe Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Rowe Trust.

SEC source: 0001213900-25-120812 · ownership.xml · nonDerivative · entry 1

Rowe Michael Bruce Jr. · CIK 0002091833 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,429,624

F1 · kind: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F1 · price: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

SEC source: 0001213900-25-120811 · ownership.xml · derivative · entry 7

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spivey Family 2024 Irrevocable Trust U/A dated 5/13/24, as amended

Disclosed balance after: 2,716,320

Underlying: Class A Common Stock · 2,716,320 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F1 · kind: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F1 · price: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of Spivey Family 2024 Irrevocable Trust U/A dated 5/13/24, as amended ("Spivey Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Spivey Trust.

SEC source: 0001213900-25-120811 · ownership.xml · derivative · entry 5

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,481,984

Underlying: Class A Common Stock · 13,481,984 shares

Expires not disclosed

F4 · derivative.exercise_price: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F1 · kind: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F1 · price: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F4 · derivative.exercise_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

F4 · derivative.expiration_date: The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

SEC source: 0001213900-25-120811 · ownership.xml · nonDerivative · entry 3

Spivey Jeremy Simmons · CIK 0002092830 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spivey Family 2024 Irrevocable Trust U/A dated 5/13/24, as amended

Disclosed balance after: 2,716,320

F1 · kind: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F1 · price: Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.

F3 · ownership.nature: The Reporting Person is the spouse of the trustee of Spivey Family 2024 Irrevocable Trust U/A dated 5/13/24, as amended ("Spivey Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Spivey Trust.