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As the general partner of BPSP, BPH may be deemed to beneficially own shares of Class A common stock that are beneficially owned by BPSP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Joshua Lutzker is a Managing Director of BP and has a pecuniary interest in certain of the securities held by the other Reporting Persons by virtue of his position at BP and certain affiliated funds and entities.  Each of the Reporting Persons, including Mr. Lutzker, disclaims beneficial ownership of any securities reported in this Form 4 except to the extent of their respective pecuniary interests therein. The inclusion of any securities in this Form 4 shall not be deemed an admission of beneficial ownership of the reported securities for purposes of the Act or for any other purpose. Certain of the Reporting Persons may be deemed to be, but do not admit to being, a group for purposes of Section 13(d)(3) under the Act."}],"balance_after":1045630,"source":{"system":"sec-edgar","filing":"0000950170-25-076001","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1886815/000095017025076001/ownership.xml","form_type":"4"}},{"id":1139175,"issuer":{"id":5886,"kind":"organization","name":"Portillo's Inc.","symbol":"PTLO"},"owners":[{"id":79473,"kind":"person","name":"Berkshire Partners LLC","position":1,"cik":"0001312988","reported_name":"Berkshire Partners LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79474,"kind":"person","name":"Berkshire Fund VIII-A, L.P.","position":2,"cik":"0001514454","reported_name":"Berkshire Fund VIII-A, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79475,"kind":"person","name":"Berkshire Fund VIII, L.P.","position":3,"cik":"0001514470","reported_name":"Berkshire Fund VIII, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79476,"kind":"person","name":"Berkshire Investors III LLC","position":4,"cik":"0001505184","reported_name":"Berkshire Investors III LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79477,"kind":"person","name":"Berkshire Investors IV LLC","position":5,"cik":"0001505185","reported_name":"Berkshire Investors IV LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79478,"kind":"person","name":"Eighth Berkshire Associates LLC","position":6,"cik":"0001888111","reported_name":"Eighth Berkshire Associates LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79479,"kind":"person","name":"Berkshire Partners Holdings LLC","position":7,"cik":"0001597786","reported_name":"Berkshire Partners Holdings LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79480,"kind":"person","name":"BPSP, L.P.","position":8,"cik":"0001597787","reported_name":"BPSP, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":70358,"kind":"person","name":"Lutzker Joshua Adam","position":9,"cik":"0001886815","reported_name":"Lutzker Joshua Adam","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-05-21T21:05:51.000Z","date":"2025-05-19","kind":"sale","planned":false,"acquired":false,"shares":590240,"price":12.23,"value":7218635.2,"ownership":{"direct":false,"nature":"By Berkshire Investors IV LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 19, 2025, the following funds or entities affiliated with Berkshire Partners LLC (\"BP\") sold shares of Class A common stock of the Issuer in a block trade pursuant to Rule 144 as follows: 6,521,015 by Berkshire Fund VIII, L.P. 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Certain of the Reporting Persons may be deemed to be, but do not admit to being, a group for purposes of Section 13(d)(3) under the Act."}],"balance_after":590240,"source":{"system":"sec-edgar","filing":"0000950170-25-076001","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1886815/000095017025076001/ownership.xml","form_type":"4"}},{"id":1139173,"issuer":{"id":5886,"kind":"organization","name":"Portillo's Inc.","symbol":"PTLO"},"owners":[{"id":79473,"kind":"person","name":"Berkshire Partners LLC","position":1,"cik":"0001312988","reported_name":"Berkshire Partners LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79474,"kind":"person","name":"Berkshire Fund VIII-A, L.P.","position":2,"cik":"0001514454","reported_name":"Berkshire Fund VIII-A, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79475,"kind":"person","name":"Berkshire Fund VIII, L.P.","position":3,"cik":"0001514470","reported_name":"Berkshire Fund VIII, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79476,"kind":"person","name":"Berkshire Investors III LLC","position":4,"cik":"0001505184","reported_name":"Berkshire Investors III LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79477,"kind":"person","name":"Berkshire Investors IV LLC","position":5,"cik":"0001505185","reported_name":"Berkshire Investors IV LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79478,"kind":"person","name":"Eighth Berkshire Associates LLC","position":6,"cik":"0001888111","reported_name":"Eighth Berkshire Associates LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79479,"kind":"person","name":"Berkshire Partners Holdings LLC","position":7,"cik":"0001597786","reported_name":"Berkshire Partners Holdings LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":79480,"kind":"person","name":"BPSP, L.P.","position":8,"cik":"0001597787","reported_name":"BPSP, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":70358,"kind":"person","name":"Lutzker Joshua Adam","position":9,"cik":"0001886815","reported_name":"Lutzker Joshua Adam","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-05-21T21:05:51.000Z","date":"2025-05-19","kind":"sale","planned":false,"acquired":false,"shares":179210,"price":12.23,"value":2191738.3,"ownership":{"direct":false,"nature":"By Berkshire Investors III LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 19, 2025, the following funds or entities affiliated with Berkshire Partners LLC (\"BP\") sold shares of Class A common stock of the Issuer in a block trade pursuant to Rule 144 as follows: 6,521,015 by Berkshire Fund VIII, L.P. 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