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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."}],"balance_after":45700,"source":{"system":"sec-edgar","filing":"0001213900-26-090850","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2079999/000121390026090850/ownership.xml","form_type":"4"}},{"id":685862,"issuer":{"id":5180,"kind":"organization","name":"Cardinal Infrastructure Group Inc."},"owners":[{"id":22996,"kind":"person","name":"Wood Benjamin","position":1,"cik":"0002123683","reported_name":"Wood Benjamin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Class A Common Stock","published_at":"2026-08-17T21:37:34.000Z","date":"2026-08-14","kind":"purchase","planned":false,"acquired":true,"shares":13627,"price":39.22,"value":534450.94,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."}],"balance_after":33627,"source":{"system":"sec-edgar","filing":"0001213900-26-090850","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2079999/000121390026090850/ownership.xml","form_type":"4"}},{"id":759043,"issuer":{"id":5180,"kind":"organization","name":"Cardinal Infrastructure Group Inc."},"owners":[{"id":22996,"kind":"person","name":"Wood Benjamin","position":1,"cik":"0002123683","reported_name":"Wood Benjamin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF OPERATING OFFICER"}}],"security":"Class A Common Stock","published_at":"2026-05-29T21:15:02.000Z","date":"2026-05-27","kind":"purchase","planned":false,"acquired":true,"shares":100,"price":54.33,"value":5433.0,"ownership":{"direct":true},"balance_after":20000,"source":{"system":"sec-edgar","filing":"0001213900-26-062942","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/2079999/000121390026062942/ownership.xml","form_type":"4"}},{"id":759042,"issuer":{"id":5180,"kind":"organization","name":"Cardinal Infrastructure Group Inc."},"owners":[{"id":22996,"kind":"person","name":"Wood Benjamin","position":1,"cik":"0002123683","reported_name":"Wood Benjamin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF OPERATING OFFICER"}}],"security":"Class A Common Stock","published_at":"2026-05-29T21:15:02.000Z","date":"2026-05-27","kind":"purchase","planned":false,"acquired":true,"shares":3600,"price":53.9,"value":194040.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"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."}],"balance_after":19900,"source":{"system":"sec-edgar","filing":"0001213900-26-062942","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/2079999/000121390026062942/ownership.xml","form_type":"4"}},{"id":759041,"issuer":{"id":5180,"kind":"organization","name":"Cardinal Infrastructure Group Inc."},"owners":[{"id":22996,"kind":"person","name":"Wood Benjamin","position":1,"cik":"0002123683","reported_name":"Wood Benjamin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF OPERATING OFFICER"}}],"security":"Class A Common Stock","published_at":"2026-05-29T21:15:02.000Z","date":"2026-05-27","kind":"purchase","planned":false,"acquired":true,"shares":4206,"price":51.9,"value":218291.4,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"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."}],"balance_after":16300,"source":{"system":"sec-edgar","filing":"0001213900-26-062942","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2079999/000121390026062942/ownership.xml","form_type":"4"}},{"id":759040,"issuer":{"id":5180,"kind":"organization","name":"Cardinal Infrastructure Group Inc."},"owners":[{"id":22996,"kind":"person","name":"Wood Benjamin","position":1,"cik":"0002123683","reported_name":"Wood Benjamin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF OPERATING OFFICER"}}],"security":"Class A Common Stock","published_at":"2026-05-29T21:15:02.000Z","date":"2026-05-27","kind":"purchase","planned":false,"acquired":true,"shares":5355,"price":50.78,"value":271926.9,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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."}],"balance_after":12094,"source":{"system":"sec-edgar","filing":"0001213900-26-062942","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2079999/000121390026062942/ownership.xml","form_type":"4"}},{"id":759039,"issuer":{"id":5180,"kind":"organization","name":"Cardinal Infrastructure Group Inc."},"owners":[{"id":22996,"kind":"person","name":"Wood Benjamin","position":1,"cik":"0002123683","reported_name":"Wood Benjamin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF OPERATING OFFICER"}}],"security":"Class A Common Stock","published_at":"2026-05-29T21:15:02.000Z","date":"2026-05-27","kind":"purchase","planned":false,"acquired":true,"shares":6739,"price":49.89,"value":336208.71,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."}],"balance_after":6739,"source":{"system":"sec-edgar","filing":"0001213900-26-062942","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2079999/000121390026062942/ownership.xml","form_type":"4"}}]}