{"transactions":[{"id":4613393,"issuer":{"id":5881,"kind":"organization","name":"Andretti Acquisition Corp. II","symbol":"POLE"},"owners":[{"id":87776,"kind":"organization","name":"Andretti Sponsor II LLC","position":1,"cik":"0002032960","reported_name":"Andretti Sponsor II LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":87777,"kind":"person","name":"Andretti Mario","position":2,"cik":"0002031378","reported_name":"Andretti Mario","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":3,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":4,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":5,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":false,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"CEO"}}],"security":"Class B Ordinary Shares","published_at":"2026-09-09T20:30:28.000Z","date":"2026-09-08","kind":"exercise","planned":false,"acquired":false,"shares":5749999,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Class B ordinary shares are convertible, at the option of the holder, into Class A ordinary shares on a one-for-one basis, for no additional consideration, and have no expiration date. On September 8, 2026, the reporting persons elected to convert 5,749,999 Class B ordinary shares of Andretti Sponsor II LLC (the \"Sponsor\") into 5,749,999 Class A ordinary shares held by Andretti Acquisition Corp. II."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The Class B ordinary shares are convertible, at the option of the holder, into Class A ordinary shares on a one-for-one basis, for no additional consideration, and have no expiration date. On September 8, 2026, the reporting persons elected to convert 5,749,999 Class B ordinary shares of Andretti Sponsor II LLC (the \"Sponsor\") into 5,749,999 Class A ordinary shares held by Andretti Acquisition Corp. II."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The Class B ordinary shares are convertible, at the option of the holder, into Class A ordinary shares on a one-for-one basis, for no additional consideration, and have no expiration date. On September 8, 2026, the reporting persons elected to convert 5,749,999 Class B ordinary shares of Andretti Sponsor II LLC (the \"Sponsor\") into 5,749,999 Class A ordinary shares held by Andretti Acquisition Corp. II."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"Mario Andretti, Michael M. Andretti, William J. Sandbrook and William M. Brown are the managing members of the Sponsor and have voting and investment discretion with respect to the securities held of record by the Sponsor. As such, Mario Andretti, Michael M. Andretti, William J. Sandbrook and William M. Brown may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mario Andretti, Michael M. Andretti, William J. Sandbrook and William M. Brown disclaim any beneficial ownership except to the extent of their respective pecuniary interests therein."}],"balance_after":1,"derivative":{"underlying":"Class A Ordinary Shares","underlying_shares":5749999},"source":{"system":"sec-edgar","filing":"0001213900-26-098411","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1527678/000121390026098411/ownership.xml","form_type":"4"}},{"id":4613392,"issuer":{"id":5881,"kind":"organization","name":"Andretti Acquisition Corp. II","symbol":"POLE"},"owners":[{"id":87776,"kind":"organization","name":"Andretti Sponsor II LLC","position":1,"cik":"0002032960","reported_name":"Andretti Sponsor II LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":87777,"kind":"person","name":"Andretti Mario","position":2,"cik":"0002031378","reported_name":"Andretti Mario","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":3,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":4,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Executive Chairman"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":5,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":false,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"CEO"}}],"security":"Class A Ordinary Shares","published_at":"2026-09-09T20:30:28.000Z","date":"2026-09-08","kind":"exercise","planned":false,"acquired":true,"shares":5749999,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Class B ordinary shares are convertible, at the option of the holder, into Class A ordinary shares on a one-for-one basis, for no additional consideration, and have no expiration date. On September 8, 2026, the reporting persons elected to convert 5,749,999 Class B ordinary shares of Andretti Sponsor II LLC (the \"Sponsor\") into 5,749,999 Class A ordinary shares held by Andretti Acquisition Corp. II."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"Mario Andretti, Michael M. Andretti, William J. Sandbrook and William M. Brown are the managing members of the Sponsor and have voting and investment discretion with respect to the securities held of record by the Sponsor. As such, Mario Andretti, Michael M. Andretti, William J. Sandbrook and William M. Brown may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mario Andretti, Michael M. Andretti, William J. Sandbrook and William M. Brown disclaim any beneficial ownership except to the extent of their respective pecuniary interests therein."}],"balance_after":5749999,"source":{"system":"sec-edgar","filing":"0001213900-26-098411","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527678/000121390026098411/ownership.xml","form_type":"4"}},{"id":767544,"issuer":{"id":4128,"kind":"organization","name":"Knife River Corp"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2026-05-21T21:14:02.000Z","date":"2026-05-20","kind":"grant","planned":false,"acquired":true,"shares":2040,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (RSUs) that vest on the day immediately prior to the date of the next Knife River Corporation (the \"issuer\") annual meeting of stockholders occurring after the date of grant and subject to the reporting person continuing in service on the board of directors of the issuer through such vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock."}],"balance_after":7735,"source":{"system":"sec-edgar","filing":"0001225208-26-005542","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527678/000122520826005542/doc4.xml","form_type":"4"}},{"id":772919,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-19T20:30:26.000Z","date":"2026-05-18","kind":"grant","planned":false,"acquired":true,"shares":105,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $200,000, as rounded up to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":7771,"source":{"system":"sec-edgar","filing":"0001527678-26-000006","document":"form4-05192026_040520.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000152767826000006/form4-05192026_040520.xml","form_type":"4"}},{"id":797199,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-04-30T20:30:12.000Z","date":"2026-04-29","kind":"sale","planned":false,"acquired":false,"shares":1500,"price":1732.6667,"value":2599000.05,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":7666,"source":{"system":"sec-edgar","filing":"0001527678-26-000004","document":"form4-04302026_040401.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000152767826000004/form4-04302026_040401.xml","form_type":"4"}},{"id":880170,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-26T16:51:47.000Z","date":"2026-02-24","kind":"sale","planned":false,"acquired":false,"shares":2500,"price":1443.3177,"value":3608294.25,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":9166,"source":{"system":"sec-edgar","filing":"0001527678-26-000002","document":"form4-02262026_040243.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000152767826000002/form4-02262026_040243.xml","form_type":"4"}},{"id":1044254,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-10T21:00:06.000Z","date":"2025-09-10","kind":"sale","planned":false,"acquired":false,"shares":800,"price":733.5583,"value":586846.64,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":11666,"source":{"system":"sec-edgar","filing":"0001415889-25-024105","document":"form4-09102025_050901.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588925024105/form4-09102025_050901.xml","form_type":"4"}},{"id":1044253,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-10T21:00:06.000Z","date":"2025-09-09","kind":"sale","planned":false,"acquired":false,"shares":100,"price":706,"value":70600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":12466,"source":{"system":"sec-edgar","filing":"0001415889-25-024105","document":"form4-09102025_050901.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588925024105/form4-09102025_050901.xml","form_type":"4"}},{"id":1044252,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-10T21:00:06.000Z","date":"2025-09-09","kind":"sale","planned":false,"acquired":false,"shares":600,"price":708.97,"value":425382.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":12566,"source":{"system":"sec-edgar","filing":"0001415889-25-024105","document":"form4-09102025_050901.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588925024105/form4-09102025_050901.xml","form_type":"4"}},{"id":1054788,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-27T20:00:07.000Z","date":"2025-08-25","kind":"sale","planned":false,"acquired":false,"shares":700,"price":689.575,"value":482702.5,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":13166,"source":{"system":"sec-edgar","filing":"0001415889-25-023112","document":"form4-08272025_040801.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588925023112/form4-08272025_040801.xml","form_type":"4"}},{"id":1132980,"issuer":{"id":4128,"kind":"organization","name":"Knife River Corp"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-05-27T20:47:43.000Z","date":"2025-05-22","kind":"grant","planned":false,"acquired":true,"shares":1551,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (RSUs) that vest on the day immediately prior to the date of the next Knife River Corporation (the \"issuer\") annual meeting of stockholders occurring after the date of grant and subject to the reporting person continuing in service on the board of directors of the issuer through such vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock."}],"balance_after":5695,"source":{"system":"sec-edgar","filing":"0001225208-25-005474","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527678/000122520825005474/doc4.xml","form_type":"4"}},{"id":1140891,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-05-20T14:15:18.000Z","date":"2025-05-16","kind":"grant","planned":false,"acquired":true,"shares":342,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting.  This year's grant is equal to $160,000, as rounded down to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":13866,"source":{"system":"sec-edgar","filing":"0001415889-25-013756","document":"form4-05202025_100514.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588925013756/form4-05202025_100514.xml","form_type":"4"}},{"id":1507538,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-21T14:00:20.000Z","date":"2024-05-17","kind":"grant","planned":false,"acquired":true,"shares":498,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting.  This year's grant is equal to $160,000, as rounded down to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":13524,"source":{"system":"sec-edgar","filing":"0001415889-24-013867","document":"form4-05212024_100512.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588924013867/form4-05212024_100512.xml","form_type":"4"}},{"id":1513880,"issuer":{"id":4128,"kind":"organization","name":"Knife River Corp"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-05-16T22:26:15.000Z","date":"2024-05-15","kind":"grant","planned":false,"acquired":true,"shares":720,"price":77.19,"value":55576.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents shares of common stock of the issuer granted to the reporting person for service on the board of directors from January 1, 2024 through May 14, 2024."}],"balance_after":4144,"source":{"system":"sec-edgar","filing":"0001225208-24-006122","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1527678/000122520824006122/doc4.xml","form_type":"4"}},{"id":1513879,"issuer":{"id":4128,"kind":"organization","name":"Knife River Corp"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-05-16T22:26:15.000Z","date":"2024-05-15","kind":"grant","planned":false,"acquired":true,"shares":1905,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (RSUs) that vest on the day immediately prior to the date of the next Knife River Corporation (the \"issuer\") annual meeting of stockholders occurring after the date of grant and subject to the reporting person continuing in service on the board of directors of the issuer through such vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock."}],"balance_after":3424,"source":{"system":"sec-edgar","filing":"0001225208-24-006122","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527678/000122520824006122/doc4.xml","form_type":"4"}},{"id":1556362,"issuer":{"id":6486,"kind":"organization","name":"Zapata Quantum, Inc."},"owners":[{"id":88821,"kind":"person","name":"Andretti Sponsor LLC","position":1,"cik":"0001843706","reported_name":"Andretti Sponsor LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":2,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":3,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":4,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}}],"security":"Class B Ordinary Shares","published_at":"2024-04-01T16:27:32.000Z","date":"2024-03-28","kind":"other","planned":false,"acquired":false,"shares":4189077,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F10","text":"The Issuer's Class B Ordinary Shares were convertible for the Issuer's shares of Class A ordinary shares, par value $0.0001 per share, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-254627) (the \"Registration Statement\") and had no expiration date. As described above, the Issuer's Class B Ordinary Shares were automatically converted into shares of Common Stock on a one-for-one basis upon the Closing."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the Business Combination Agreement, dated as of September 6, 2023, among the Issuer and certain other parties (the \"Business Combination Agreement\"), the Issuer's Class B ordinary shares, par value $0.0001 per share (the \"Class B Ordinary Shares\"), automatically converted into shares of the Issuer's common stock, par value $0.0001 per share (\"common stock\"), on a one-for-one basis upon the closing of the transactions contemplated by the Business Combination Agreement (the \"Closing\")."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pursuant to the Business Combination Agreement, dated as of September 6, 2023, among the Issuer and certain other parties (the \"Business Combination Agreement\"), the Issuer's Class B ordinary shares, par value $0.0001 per share (the \"Class B Ordinary Shares\"), automatically converted into shares of the Issuer's common stock, par value $0.0001 per share (\"common stock\"), on a one-for-one basis upon the closing of the transactions contemplated by the Business Combination Agreement (the \"Closing\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"The Issuer's Class B Ordinary Shares were convertible for the Issuer's shares of Class A ordinary shares, par value $0.0001 per share, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-254627) (the \"Registration Statement\") and had no expiration date. As described above, the Issuer's Class B Ordinary Shares were automatically converted into shares of Common Stock on a one-for-one basis upon the Closing."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F10","text":"The Issuer's Class B Ordinary Shares were convertible for the Issuer's shares of Class A ordinary shares, par value $0.0001 per share, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-254627) (the \"Registration Statement\") and had no expiration date. As described above, the Issuer's Class B Ordinary Shares were automatically converted into shares of Common Stock on a one-for-one basis upon the Closing."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"Andretti Sponsor LLC (the \"Sponsor\") is the record holder of such shares of common stock. Mr. Andretti, Mr. Sandbrook and Mr. Brown are members of the Sponsor and (together with other members of the Sponsor) share voting and investment discretion with respect to the shares of common stock held of record by the Sponsor. In addition, each of Mr. Andretti, Mr. Sandbrook and Mr. Brown may be entitled to distributions of common stock and private placement warrants from the Sponsor following the consummation of the initial business combination. Each of Mr. Andretti, Mr. Sandbrook and Mr. Brown disclaims any beneficial ownership of the securities held by the Sponsor, other than to the extent of any pecuniary interest he may have therein, directly or indirectly."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":4189077},"source":{"system":"sec-edgar","filing":"0000950142-24-000846","document":"es240464183_4-aspon.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1685577/000095014224000846/es240464183_4-aspon.xml","form_type":"4"}},{"id":1556361,"issuer":{"id":6486,"kind":"organization","name":"Zapata Quantum, Inc."},"owners":[{"id":88821,"kind":"person","name":"Andretti Sponsor LLC","position":1,"cik":"0001843706","reported_name":"Andretti Sponsor LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":2,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":3,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":4,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2024-04-01T16:27:32.000Z","date":"2024-03-28","kind":"other","planned":false,"acquired":true,"shares":370923,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F8","text":"Received in connection with Merger with Private Zapata. In accordance with a Note Exchange Agreement, dated March 28, 2024, by and among Mr. Andretti, the Issuer and Private Zapata, at the effective time of the Merger, Mr. Andretti exchanged an outstanding Senior Secured Promissory Note between Mr. Andretti and Private Zapata, with an aggregate principal amount, together with then-outstanding interest, of $1,601,369.86, for 370,923 shares of Common Stock, at a conversion price of $4.50 per share."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"Received in connection with Merger with Private Zapata. In accordance with a Note Exchange Agreement, dated March 28, 2024, by and among Mr. Andretti, the Issuer and Private Zapata, at the effective time of the Merger, Mr. Andretti exchanged an outstanding Senior Secured Promissory Note between Mr. Andretti and Private Zapata, with an aggregate principal amount, together with then-outstanding interest, of $1,601,369.86, for 370,923 shares of Common Stock, at a conversion price of $4.50 per share."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F9","text":"Mr. Andretti is the record holder of such shares of common stock."}],"balance_after":370923,"source":{"system":"sec-edgar","filing":"0000950142-24-000846","document":"es240464183_4-aspon.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1685577/000095014224000846/es240464183_4-aspon.xml","form_type":"4"}},{"id":1556360,"issuer":{"id":6486,"kind":"organization","name":"Zapata Quantum, Inc."},"owners":[{"id":88821,"kind":"person","name":"Andretti Sponsor LLC","position":1,"cik":"0001843706","reported_name":"Andretti Sponsor LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":2,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":3,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":4,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2024-04-01T16:27:32.000Z","date":"2024-03-28","kind":"other","planned":false,"acquired":true,"shares":243368,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"Received in connection with the Merger with Private Zapata. In accordance with a Note Exchange Agreement, dated March 28, 2024, by and among Mr. Sandbrook, the Issuer and Private Zapata, at the effective time of the Merger, Mr. Sandbrook exchanged an outstanding Senior Secured Promissory Note between Mr. Sandbrook and Private Zapata, with an aggregate principal amount, together with then-outstanding interest, of $1,050,684.93, for 243,368 shares of Common Stock, at a conversion price of $4.50 per share."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Received in connection with the Merger with Private Zapata. In accordance with a Note Exchange Agreement, dated March 28, 2024, by and among Mr. Sandbrook, the Issuer and Private Zapata, at the effective time of the Merger, Mr. Sandbrook exchanged an outstanding Senior Secured Promissory Note between Mr. Sandbrook and Private Zapata, with an aggregate principal amount, together with then-outstanding interest, of $1,050,684.93, for 243,368 shares of Common Stock, at a conversion price of $4.50 per share."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F7","text":"Mr. Sandbrook is the record holder of such shares of common stock."}],"balance_after":243368,"source":{"system":"sec-edgar","filing":"0000950142-24-000846","document":"es240464183_4-aspon.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1685577/000095014224000846/es240464183_4-aspon.xml","form_type":"4"}},{"id":1556359,"issuer":{"id":6486,"kind":"organization","name":"Zapata Quantum, Inc."},"owners":[{"id":88821,"kind":"person","name":"Andretti Sponsor LLC","position":1,"cik":"0001843706","reported_name":"Andretti Sponsor LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":2,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":3,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":4,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2024-04-01T16:27:32.000Z","date":"2024-03-28","kind":"grant","planned":false,"acquired":true,"shares":34744,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Received in connection with the Issuer's business combination (the \"Merger\") with Zapata Computing, Inc. (\"Private Zapata\"). In accordance with a Note Exchange Agreement, dated March 28, 2024, by and among Mr. Brown, the Issuer and Private Zapata, at the effective time of the Merger, Mr. Brown exchanged an outstanding Senior Secured Promissory Note between Mr. Brown and Private Zapata, with an aggregate principal amount, together with then-outstanding interest, of $150,000, for 34,744 shares of Common Stock, at a conversion price of $4.50 per share."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Received in connection with the Issuer's business combination (the \"Merger\") with Zapata Computing, Inc. (\"Private Zapata\"). In accordance with a Note Exchange Agreement, dated March 28, 2024, by and among Mr. Brown, the Issuer and Private Zapata, at the effective time of the Merger, Mr. Brown exchanged an outstanding Senior Secured Promissory Note between Mr. Brown and Private Zapata, with an aggregate principal amount, together with then-outstanding interest, of $150,000, for 34,744 shares of Common Stock, at a conversion price of $4.50 per share."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"Mr. Brown is the record holder of such shares of common stock."}],"balance_after":34744,"source":{"system":"sec-edgar","filing":"0000950142-24-000846","document":"es240464183_4-aspon.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1685577/000095014224000846/es240464183_4-aspon.xml","form_type":"4"}},{"id":1556358,"issuer":{"id":6486,"kind":"organization","name":"Zapata Quantum, Inc."},"owners":[{"id":88821,"kind":"person","name":"Andretti Sponsor LLC","position":1,"cik":"0001843706","reported_name":"Andretti Sponsor LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":2,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":3,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":4,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2024-04-01T16:27:32.000Z","date":"2024-03-28","kind":"other","planned":false,"acquired":false,"shares":652214,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Pursuant to certain Non-Redemption Agreements among the Sponsor and certain other parties, upon the Closing the Sponsor transferred an aggregate of 652,214 shares of common stock to such other parties."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Pursuant to certain Non-Redemption Agreements among the Sponsor and certain other parties, upon the Closing the Sponsor transferred an aggregate of 652,214 shares of common stock to such other parties."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"Andretti Sponsor LLC (the \"Sponsor\") is the record holder of such shares of common stock. Mr. Andretti, Mr. Sandbrook and Mr. Brown are members of the Sponsor and (together with other members of the Sponsor) share voting and investment discretion with respect to the shares of common stock held of record by the Sponsor. In addition, each of Mr. Andretti, Mr. Sandbrook and Mr. Brown may be entitled to distributions of common stock and private placement warrants from the Sponsor following the consummation of the initial business combination. Each of Mr. Andretti, Mr. Sandbrook and Mr. Brown disclaims any beneficial ownership of the securities held by the Sponsor, other than to the extent of any pecuniary interest he may have therein, directly or indirectly."}],"balance_after":3536863,"source":{"system":"sec-edgar","filing":"0000950142-24-000846","document":"es240464183_4-aspon.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1685577/000095014224000846/es240464183_4-aspon.xml","form_type":"4"}},{"id":1556357,"issuer":{"id":6486,"kind":"organization","name":"Zapata Quantum, Inc."},"owners":[{"id":88821,"kind":"person","name":"Andretti Sponsor LLC","position":1,"cik":"0001843706","reported_name":"Andretti Sponsor LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":2,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":3,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":4,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Remarks"}}],"security":"Common Stock","published_at":"2024-04-01T16:27:32.000Z","date":"2024-03-28","kind":"other","planned":false,"acquired":true,"shares":4189077,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the Business Combination Agreement, dated as of September 6, 2023, among the Issuer and certain other parties (the \"Business Combination Agreement\"), the Issuer's Class B ordinary shares, par value $0.0001 per share (the \"Class B Ordinary Shares\"), automatically converted into shares of the Issuer's common stock, par value $0.0001 per share (\"common stock\"), on a one-for-one basis upon the closing of the transactions contemplated by the Business Combination Agreement (the \"Closing\")."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pursuant to the Business Combination Agreement, dated as of September 6, 2023, among the Issuer and certain other parties (the \"Business Combination Agreement\"), the Issuer's Class B ordinary shares, par value $0.0001 per share (the \"Class B Ordinary Shares\"), automatically converted into shares of the Issuer's common stock, par value $0.0001 per share (\"common stock\"), on a one-for-one basis upon the closing of the transactions contemplated by the Business Combination Agreement (the \"Closing\")."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"Andretti Sponsor LLC (the \"Sponsor\") is the record holder of such shares of common stock. Mr. Andretti, Mr. Sandbrook and Mr. Brown are members of the Sponsor and (together with other members of the Sponsor) share voting and investment discretion with respect to the shares of common stock held of record by the Sponsor. In addition, each of Mr. Andretti, Mr. Sandbrook and Mr. Brown may be entitled to distributions of common stock and private placement warrants from the Sponsor following the consummation of the initial business combination. Each of Mr. Andretti, Mr. Sandbrook and Mr. Brown disclaims any beneficial ownership of the securities held by the Sponsor, other than to the extent of any pecuniary interest he may have therein, directly or indirectly."}],"balance_after":4189077,"source":{"system":"sec-edgar","filing":"0000950142-24-000846","document":"es240464183_4-aspon.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1685577/000095014224000846/es240464183_4-aspon.xml","form_type":"4"}},{"id":1738727,"issuer":{"id":4128,"kind":"organization","name":"Knife River Corp"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-11-16T22:25:27.000Z","date":"2023-11-15","kind":"grant","planned":false,"acquired":true,"shares":1519,"price":57.57,"value":87448.83,"ownership":{"direct":true},"balance_after":1519,"source":{"system":"sec-edgar","filing":"0001225208-23-010263","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527678/000122520823010263/doc4.xml","form_type":"4"}},{"id":1744431,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-11-13T14:00:08.000Z","date":"2023-11-09","kind":"sale","planned":false,"acquired":false,"shares":5000,"price":185.1855,"value":925927.5,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":13026,"source":{"system":"sec-edgar","filing":"0001415889-23-014986","document":"form4-11132023_091102.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588923014986/form4-11132023_091102.xml","form_type":"4"}},{"id":1781251,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-09-14T14:30:07.000Z","date":"2023-09-12","kind":"sale","planned":false,"acquired":false,"shares":7500,"price":187.5152,"value":1406364.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":18026,"source":{"system":"sec-edgar","filing":"0001415889-23-013249","document":"form4-09142023_100902.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588923013249/form4-09142023_100902.xml","form_type":"4"}},{"id":1889741,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-05-17T20:15:47.000Z","date":"2023-05-16","kind":"grant","planned":false,"acquired":true,"shares":1065,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting.  This year's grant is equal to $160,000, as rounded down to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person."}],"balance_after":25526,"source":{"system":"sec-edgar","filing":"0001415889-23-008188","document":"form4-05172023_040515.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588923008188/form4-05172023_040515.xml","form_type":"4"}},{"id":2242785,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-06-06T20:15:17.000Z","date":"2022-06-02","kind":"gift","acquired":true,"shares":170,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Member of Household"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents a gift of securities to a member of the Reporting Person's household. The Reporting Person disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein, and the inclusion of such shares in this Report shall not be deemed an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or any other purpose."}],"balance_after":170,"source":{"system":"sec-edgar","filing":"0001415889-22-006150","document":"form4-06062022_040601.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588922006150/form4-06062022_040601.xml","form_type":"4"}},{"id":2242784,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-06-06T20:15:17.000Z","date":"2022-06-02","kind":"gift","acquired":false,"shares":170,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents a gift of securities to a member of the Reporting Person's household. The Reporting Person disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein, and the inclusion of such shares in this Report shall not be deemed an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or any other purpose."}],"balance_after":24291,"source":{"system":"sec-edgar","filing":"0001415889-22-006150","document":"form4-06062022_040601.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588922006150/form4-06062022_040601.xml","form_type":"4"}},{"id":2242783,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-06-06T20:15:17.000Z","date":"2022-06-02","kind":"gift","acquired":false,"shares":850,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents gifts to immediate family members."}],"balance_after":24461,"source":{"system":"sec-edgar","filing":"0001415889-22-006150","document":"form4-06062022_040601.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588922006150/form4-06062022_040601.xml","form_type":"4"}},{"id":2264240,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-05-19T21:57:29.000Z","date":"2022-05-17","kind":"grant","acquired":true,"shares":1869,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting.  This year's grant is equal to $160,000, as rounded down to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."}],"balance_after":25311,"source":{"system":"sec-edgar","filing":"0001415889-22-005325","document":"form4-05192022_020520.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000141588922005325/form4-05192022_020520.xml","form_type":"4"}},{"id":2430571,"issuer":{"id":6486,"kind":"organization","name":"Zapata Quantum, Inc."},"owners":[{"id":88821,"kind":"person","name":"Andretti Sponsor LLC","position":1,"cik":"0001843706","reported_name":"Andretti Sponsor LLC","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"See Remarks"}},{"id":87778,"kind":"person","name":"ANDRETTI MICHAEL","position":2,"cik":"0001685577","reported_name":"ANDRETTI MICHAEL","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}},{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":3,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}},{"id":87779,"kind":"person","name":"Brown William Matthew","position":4,"cik":"0001556095","reported_name":"Brown William Matthew","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Class B Ordinary Shares","published_at":"2022-01-20T17:05:28.000Z","date":"2022-01-18","kind":"other","acquired":false,"shares":1430923,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reported shares of Andretti Acquisition Corp. (the \"Issuer\") are directly held by Andretti Sponsor LLC (the \"Sponsor\"). The Issuer's shares of Class B ordinary shares, par value $0.0001 per share (the \"Class B Ordinary Shares\"), are convertible for the Issuer's shares of Class A ordinary shares, par value $0.0001 per share, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-254627) (the \"Registration Statement\") and have no expiration date."},{"field":"kind","element":"transactionCoding","label":"F2","text":"Immediately prior to the closing of the Issuer's initial public offering, the Sponsor forfeited to the Issuer 1,430,923 Class B Ordinary Shares."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reported shares of Andretti Acquisition Corp. (the \"Issuer\") are directly held by Andretti Sponsor LLC (the \"Sponsor\"). The Issuer's shares of Class B ordinary shares, par value $0.0001 per share (the \"Class B Ordinary Shares\"), are convertible for the Issuer's shares of Class A ordinary shares, par value $0.0001 per share, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-254627) (the \"Registration Statement\") and have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reported shares of Andretti Acquisition Corp. (the \"Issuer\") are directly held by Andretti Sponsor LLC (the \"Sponsor\"). The Issuer's shares of Class B ordinary shares, par value $0.0001 per share (the \"Class B Ordinary Shares\"), are convertible for the Issuer's shares of Class A ordinary shares, par value $0.0001 per share, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-254627) (the \"Registration Statement\") and have no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"The Sponsor is the record holder of such shares of Class B common stock. Mr. Andretti, Mr. Sandbrook and Mr. Brown are members of the Sponsor and (together with other members of the Sponsor) share voting and investment discretion with respect to the shares of Class B Ordinary Shares held of record by the Sponsor. In addition, each of Mr. Andretti, Mr. Sandbrook and Mr. Brown may be entitled to distributions of Class B common stock and private placement warrants from the Sponsor following the consummation of the initial business combination. Each of Mr. Andretti, Mr. Sandbrook and Mr. Brown disclaims any beneficial ownership of the securities held by the Sponsor, other than to the extent of any pecuniary interest he may have therein, directly or indirectly."}],"balance_after":4189077,"derivative":{"underlying":"Class A Ordinary Shares","underlying_shares":1430923},"source":{"system":"sec-edgar","filing":"0000950142-22-000390","document":"es220218995_4-sponsor.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1685577/000095014222000390/es220218995_4-sponsor.xml","form_type":"4"}},{"id":2703654,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-05-20T14:09:33.000Z","date":"2021-05-18","kind":"grant","acquired":true,"shares":1939,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $160,000, as rounded down to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."}],"balance_after":23442,"source":{"system":"sec-edgar","filing":"0001179110-21-005609","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000117911021005609/edgar.xml","form_type":"4"}},{"id":2776644,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted stock units","published_at":"2021-03-22T19:17:06.000Z","date":"2021-03-18","kind":"exercise","acquired":false,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting."},{"field":"date","element":"transactionDate","label":"F1","text":"The March 1, 2019 stock award's fourth performance-based target of a 20-day consecutive trading day threshold of $58.60 per share, as set forth in footnote 3, was achieved."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Pursuant to the Mr. Sandbrook's executive transition agreement filed with the SEC via Form 8-K on February 14, 2020, the Performance-Based portion of the March 1, 2019 Restricted Stock Units would result in his vesting into shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in his vesting into 11,720 shares) and (ii) $58.60 per share (resulting in his further vesting into 11,720 shares) within the three-year period from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Pursuant to the Mr. Sandbrook's executive transition agreement filed with the SEC via Form 8-K on February 14, 2020, the Performance-Based portion of the March 1, 2019 Restricted Stock Units would result in his vesting into shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in his vesting into 11,720 shares) and (ii) $58.60 per share (resulting in his further vesting into 11,720 shares) within the three-year period from the date of grant."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":11720},"source":{"system":"sec-edgar","filing":"0001073429-21-000123","document":"wf-form4_161645500992672.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342921000123/wf-form4_161645500992672.xml","form_type":"4"}},{"id":2776643,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common stock","published_at":"2021-03-22T19:17:06.000Z","date":"2021-03-18","kind":"exercise","acquired":true,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The March 1, 2019 stock award's fourth performance-based target of a 20-day consecutive trading day threshold of $58.60 per share, as set forth in footnote 3, was achieved."}],"balance_after":420524,"source":{"system":"sec-edgar","filing":"0001073429-21-000123","document":"wf-form4_161645500992672.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342921000123/wf-form4_161645500992672.xml","form_type":"4"}},{"id":2789745,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted stock units","published_at":"2021-03-15T19:06:46.000Z","date":"2021-03-11","kind":"exercise","acquired":false,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting."},{"field":"date","element":"transactionDate","label":"F1","text":"The March 1, 2019 stock award's third performance-based target of a 20-day consecutive trading day threshold of $54.10 per share, as set forth in footnote 3, was achieved."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Pursuant to the Mr. Sandbrook's executive transition agreement filed with the SEC via Form 8-K on February 14, 2020, the Performance-Based portion of the March 1, 2019 Restricted Stock Units would result in his vesting into shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in his vesting into 11,720 shares) and (ii) $58.60 per share (resulting in his further vesting into 11,720 shares) within the three-year period from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Pursuant to the Mr. Sandbrook's executive transition agreement filed with the SEC via Form 8-K on February 14, 2020, the Performance-Based portion of the March 1, 2019 Restricted Stock Units would result in his vesting into shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in his vesting into 11,720 shares) and (ii) $58.60 per share (resulting in his further vesting into 11,720 shares) within the three-year period from the date of grant."}],"balance_after":11720,"derivative":{"underlying":"Common stock","underlying_shares":11720},"source":{"system":"sec-edgar","filing":"0001073429-21-000111","document":"wf-form4_161584958940831.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342921000111/wf-form4_161584958940831.xml","form_type":"4"}},{"id":2789744,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common stock","published_at":"2021-03-15T19:06:46.000Z","date":"2021-03-11","kind":"exercise","acquired":true,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The March 1, 2019 stock award's third performance-based target of a 20-day consecutive trading day threshold of $54.10 per share, as set forth in footnote 3, was achieved."}],"balance_after":408804,"source":{"system":"sec-edgar","filing":"0001073429-21-000111","document":"wf-form4_161584958940831.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342921000111/wf-form4_161584958940831.xml","form_type":"4"}},{"id":2965346,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common stock","published_at":"2020-11-27T16:49:29.000Z","date":"2020-11-24","kind":"sale","acquired":false,"shares":10000,"price":38.15,"value":381500.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $38.08 to $38.34, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1)."}],"balance_after":397084,"source":{"system":"sec-edgar","filing":"0001073429-20-000166","document":"wf-form4_160651375532188.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000166/wf-form4_160651375532188.xml","form_type":"4"}},{"id":3013954,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common stock","published_at":"2020-10-05T17:43:48.000Z","date":"2020-10-01","kind":"grant","acquired":true,"shares":2705,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reporting person received an award of restricted stock units (RSUs) on October 1, 2020 under the Company's Long Term Incentive Plan for his service on the Board for the period beginning October 1, 2020 and ending on the date of the Company's 2021 annual meeting of stockholders.  The RSUs granted will vest in full on the earlier of (i) the date of the Company's 2021 annual meeting of stockholders and (ii) May 13, 2021."}],"balance_after":407084,"source":{"system":"sec-edgar","filing":"0001073429-20-000133","document":"wf-form4_160193421540613.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000133/wf-form4_160193421540613.xml","form_type":"4"}},{"id":3112213,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common stock","published_at":"2020-06-12T18:16:18.000Z","date":"2020-06-10","kind":"grant","acquired":true,"shares":915,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reporting person was granted an award of 915 restricted stock units (RSUs) on June 10, 2020 under the U.S. Concrete, Inc. Long Term Incentive Plan for his service as a new non-employee director for the period beginning May 14, 2020 through September 30, 2020. The RSUs awarded will vest on July 1, 2020 in the amount of 305 shares of the Company's common stock and on October 1, 2020 in the amount of 610 shares of the Company's common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person has reported prior awards of RSUs in Table II of Form 4. The total reported in Column 5 of Table I as directly owned shares includes the 915 newly-awarded RSUs and 403,464 shares of common stock."}],"balance_after":404379,"source":{"system":"sec-edgar","filing":"0001073429-20-000100","document":"wf-form4_159200016116552.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000100/wf-form4_159200016116552.xml","form_type":"4"}},{"id":3139441,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-05-21T14:42:08.000Z","date":"2020-05-19","kind":"grant","acquired":true,"shares":4788,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $160,000, as rounded down to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."}],"balance_after":21503,"source":{"system":"sec-edgar","filing":"0001179110-20-006420","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000117911020006420/edgar.xml","form_type":"4"}},{"id":3180944,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Restricted stock units","published_at":"2020-04-07T18:31:05.000Z","date":"2020-04-03","kind":"exercise","acquired":false,"shares":23440,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting or, as set forth in footnote 6, two shares of common stock in the aggregate."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which vested on May 16, 2019 and the remaining half of which vested on October 14, 2019. The vesting reported herein represents the remaining Time-Based awards that had accelerated vesting pursuant to Mr. Sandbrook's executive transition agreement filed via Form 8-K as noted above."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The Performance-Based portion of the March 1, 2019 Restricted Stock Units remaining would result in vesting into additional shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant. Pursuant to Mr. Sandbrook's executive transition agreement noted above, the Performance-Based restricted stock units granted on March 1, 2019 shall remain outstanding."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which vested on May 16, 2019 and the remaining half of which vested on October 14, 2019. The vesting reported herein represents the remaining Time-Based awards that had accelerated vesting pursuant to Mr. Sandbrook's executive transition agreement filed via Form 8-K as noted above."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The Performance-Based portion of the March 1, 2019 Restricted Stock Units remaining would result in vesting into additional shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant. Pursuant to Mr. Sandbrook's executive transition agreement noted above, the Performance-Based restricted stock units granted on March 1, 2019 shall remain outstanding."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"The Performance-Based portion of the March 1, 2019 Restricted Stock Units remaining would result in vesting into additional shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant. Pursuant to Mr. Sandbrook's executive transition agreement noted above, the Performance-Based restricted stock units granted on March 1, 2019 shall remain outstanding."}],"balance_after":23440,"derivative":{"underlying":"Common stock","underlying_shares":23440},"source":{"system":"sec-edgar","filing":"0001073429-20-000065","document":"wf-form4_158629864807321.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000065/wf-form4_158629864807321.xml","form_type":"4"}},{"id":3180943,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-04-07T18:31:05.000Z","date":"2020-02-28","kind":"gift","acquired":true,"shares":535,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Reporting Person as UGMA custodian for granddaughter"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction involved a gift of securities by Mr. Sandbrook to his granddaughter, a minor, and is a transfer to Mr. Sandbrook as custodian for his granddaughter under the Uniform Gifts to Minors Act.  Mr. Sandbrook disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that he is the beneficial owner of these shares for purposes of Section 16 or for any other purpose."}],"balance_after":1512,"source":{"system":"sec-edgar","filing":"0001073429-20-000065","document":"wf-form4_158629864807321.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000065/wf-form4_158629864807321.xml","form_type":"4"}},{"id":3180942,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-04-07T18:31:05.000Z","date":"2020-02-28","kind":"gift","acquired":false,"shares":535,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction involved a gift of securities by Mr. Sandbrook to his granddaughter, a minor, and is a transfer to Mr. Sandbrook as custodian for his granddaughter under the Uniform Gifts to Minors Act.  Mr. Sandbrook disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that he is the beneficial owner of these shares for purposes of Section 16 or for any other purpose."}],"balance_after":403464,"source":{"system":"sec-edgar","filing":"0001073429-20-000065","document":"wf-form4_158629864807321.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000065/wf-form4_158629864807321.xml","form_type":"4"}},{"id":3180941,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-04-07T18:31:05.000Z","date":"2020-02-28","kind":"gift","acquired":false,"shares":4280,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":403999,"source":{"system":"sec-edgar","filing":"0001073429-20-000065","document":"wf-form4_158629864807321.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000065/wf-form4_158629864807321.xml","form_type":"4"}},{"id":3180940,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-04-07T18:31:05.000Z","date":"2020-04-03","kind":"disposition_to_issuer","acquired":false,"shares":13400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Mr. Sandbrook's Performance-Based restricted stock granted on March 1, 2018 was forfeited on April 3, 2020 pursuant to his executive transition agreement filed with the SEC via the Company's Form 8-K noted in footnote 1."}],"balance_after":408279,"source":{"system":"sec-edgar","filing":"0001073429-20-000065","document":"wf-form4_158629864807321.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000065/wf-form4_158629864807321.xml","form_type":"4"}},{"id":3180939,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-04-07T18:31:05.000Z","date":"2020-04-03","kind":"tax_withholding","acquired":false,"shares":11861,"price":14.16,"value":167951.76,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Company's Form 8-K filed with the SEC on February 14, 2020, Mr. Sandbrook had an accelerated vesting on April 3, 2020 of his Time-Based restricted stock units granted on March 1, 2019 and his Time-Based restricted stock granted on March 1, 2018."}],"balance_after":421679,"source":{"system":"sec-edgar","filing":"0001073429-20-000065","document":"wf-form4_158629864807321.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000065/wf-form4_158629864807321.xml","form_type":"4"}},{"id":3180938,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-04-07T18:31:05.000Z","date":"2020-04-03","kind":"exercise","acquired":true,"shares":23440,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Company's Form 8-K filed with the SEC on February 14, 2020, Mr. Sandbrook had an accelerated vesting on April 3, 2020 of his Time-Based restricted stock units granted on March 1, 2019 and his Time-Based restricted stock granted on March 1, 2018."}],"balance_after":433540,"source":{"system":"sec-edgar","filing":"0001073429-20-000065","document":"wf-form4_158629864807321.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000065/wf-form4_158629864807321.xml","form_type":"4"}},{"id":3234114,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Restricted stock units","published_at":"2020-03-03T18:18:58.000Z","date":"2020-03-01","kind":"exercise","acquired":false,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting or, as set forth in footnote 3, two shares of common stock in the aggregate."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which vested on 5/16/2019 and the remaining half of which vested on 10/14/2019. The vesting reported herein represents the first of three Time-Based awards that vest over three years in equal, annual installments from the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The Performance-Based portion of the March 1, 2019 Restricted Stock Units would result in vesting into additional shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which vested on 5/16/2019 and the remaining half of which vested on 10/14/2019. The vesting reported herein represents the first of three Time-Based awards that vest over three years in equal, annual installments from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The Performance-Based portion of the March 1, 2019 Restricted Stock Units would result in vesting into additional shares if the average of the daily volume weighted average share price (VWAP) over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant."}],"balance_after":46880,"derivative":{"underlying":"Common stock","underlying_shares":11720},"source":{"system":"sec-edgar","filing":"0001073429-20-000027","document":"wf-form4_158327752116719.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000027/wf-form4_158327752116719.xml","form_type":"4"}},{"id":3234113,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-03-03T18:18:58.000Z","date":"2020-03-01","kind":"disposition_to_issuer","acquired":false,"shares":13120,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":410100,"source":{"system":"sec-edgar","filing":"0001073429-20-000027","document":"wf-form4_158327752116719.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000027/wf-form4_158327752116719.xml","form_type":"4"}},{"id":3234112,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-03-03T18:18:58.000Z","date":"2020-03-01","kind":"tax_withholding","acquired":false,"shares":6070,"price":26.84,"value":162918.8,"ownership":{"direct":true},"balance_after":423220,"source":{"system":"sec-edgar","filing":"0001073429-20-000027","document":"wf-form4_158327752116719.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000027/wf-form4_158327752116719.xml","form_type":"4"}},{"id":3234111,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-03-03T18:18:58.000Z","date":"2020-03-01","kind":"exercise","acquired":true,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":429290,"source":{"system":"sec-edgar","filing":"0001073429-20-000027","document":"wf-form4_158327752116719.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000027/wf-form4_158327752116719.xml","form_type":"4"}},{"id":3244466,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-02-27T19:56:35.000Z","date":"2020-02-27","kind":"purchase","acquired":true,"shares":15000,"price":27.96,"value":419400.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $27.13 to $28.00, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, 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 range set forth in this footnote (1)."}],"balance_after":417570,"source":{"system":"sec-edgar","filing":"0001073429-20-000025","document":"wf-form4_158285137715374.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000025/wf-form4_158285137715374.xml","form_type":"4"}},{"id":3274828,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-02-13T19:14:48.000Z","date":"2019-05-16","kind":"gift","acquired":true,"shares":305,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Reporting Person as UGMA custodian for granddaughter"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction involved a gift of securities by the reporting person to his granddaughter, a minor, and is a transfer to the reporting person as custodian for his granddaughter under the Uniform Gifts to Minors Act.  The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose."}],"balance_after":977,"source":{"system":"sec-edgar","filing":"0001073429-20-000006","document":"wf-form5_158163927112012.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000006/wf-form5_158163927112012.xml","form_type":"5"}},{"id":3274827,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-02-13T19:14:48.000Z","date":"2019-05-16","kind":"gift","acquired":false,"shares":305,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction involved a gift of securities by the reporting person to his granddaughter, a minor, and is a transfer to the reporting person as custodian for his granddaughter under the Uniform Gifts to Minors Act.  The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose."}],"balance_after":402570,"source":{"system":"sec-edgar","filing":"0001073429-20-000006","document":"wf-form5_158163927112012.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000006/wf-form5_158163927112012.xml","form_type":"5"}},{"id":3274826,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2020-02-13T19:14:48.000Z","date":"2019-05-16","kind":"gift","acquired":false,"shares":2440,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":402875,"source":{"system":"sec-edgar","filing":"0001073429-20-000006","document":"wf-form5_158163927112012.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342920000006/wf-form5_158163927112012.xml","form_type":"5"}},{"id":3339547,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2019-12-17T14:22:38.000Z","date":"2019-12-13","kind":"purchase","acquired":true,"shares":10500,"price":39.44,"value":414120.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $39.39 to $39.45, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, 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 range set forth in this footnote (1)."}],"balance_after":405315,"source":{"system":"sec-edgar","filing":"0001073429-19-000232","document":"wf-form4_157661054107507.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000232/wf-form4_157661054107507.xml","form_type":"4"}},{"id":3393096,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Restricted stock units","published_at":"2019-10-16T18:49:15.000Z","date":"2019-10-14","kind":"exercise","acquired":false,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting, or, as set forth in footnote 4, two shares of common stock in the aggregate."},{"field":"date","element":"transactionDate","label":"F1","text":"The second Performance-Based target of a 20-day consecutive trading-day threshold of $49.90 was achieved."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which previously vested on the day that the average of the daily volume-weighted average share price of the Company's stock over a period of 20 consecutive trading days attained $45.90 per share, and the remaining half of which vested on October 14, 2019 when the average of the daily volume-weighted average share price of the Company's stock over a period of 20 consecutive trading days attained $49.90 per share."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The Performance-Based portion of the Restricted Stock Units would result in vesting into additional shares (effectively making each performance-based RSU represent two shares) if the average of the daily VWAP over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which previously vested on the day that the average of the daily volume-weighted average share price of the Company's stock over a period of 20 consecutive trading days attained $45.90 per share, and the remaining half of which vested on October 14, 2019 when the average of the daily volume-weighted average share price of the Company's stock over a period of 20 consecutive trading days attained $49.90 per share."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The Performance-Based portion of the Restricted Stock Units would result in vesting into additional shares (effectively making each performance-based RSU represent two shares) if the average of the daily VWAP over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The Restricted Stock Units are reported as still existing after vesting because they could, as set forth in footnote 4 above, result in vesting into additional shares."}],"balance_after":58600,"derivative":{"underlying":"Common stock","underlying_shares":11720},"source":{"system":"sec-edgar","filing":"0001073429-19-000194","document":"wf-form4_157126612760934.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000194/wf-form4_157126612760934.xml","form_type":"4"}},{"id":3393095,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2019-10-16T18:49:15.000Z","date":"2019-10-14","kind":"tax_withholding","acquired":false,"shares":4611,"price":48.4,"value":223172.4,"ownership":{"direct":true},"balance_after":394815,"source":{"system":"sec-edgar","filing":"0001073429-19-000194","document":"wf-form4_157126612760934.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000194/wf-form4_157126612760934.xml","form_type":"4"}},{"id":3393094,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2019-10-16T18:49:15.000Z","date":"2019-10-14","kind":"exercise","acquired":true,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The second Performance-Based target of a 20-day consecutive trading-day threshold of $49.90 was achieved."}],"balance_after":399426,"source":{"system":"sec-edgar","filing":"0001073429-19-000194","document":"wf-form4_157126612760934.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000194/wf-form4_157126612760934.xml","form_type":"4"}},{"id":3513762,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-05-23T15:43:21.000Z","date":"2019-05-21","kind":"grant","acquired":true,"shares":3262,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $160,000 as rounded down to the nearest whole share based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."}],"balance_after":16715,"source":{"system":"sec-edgar","filing":"0001179110-19-006560","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000117911019006560/edgar.xml","form_type":"4"}},{"id":3518995,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Restricted stock units","published_at":"2019-05-20T18:36:40.000Z","date":"2019-05-16","kind":"exercise","acquired":false,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting, or, as set forth in footnote 4, two shares of common stock in the aggregate."},{"field":"date","element":"transactionDate","label":"F1","text":"The first Performance-Based target of a 20-day consecutive trading-day threshold of $45.90 was achieved."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which already vested on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attained $45.90 per share, and the remaining half of which shall vest on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attains $49.90 per share within the three-year period beginning on the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The Performance-Based portion of the Restricted Stock Units would result in vesting into additional shares (effectively making each performance-based RSU represent two shares) if the average of the daily VWAP over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which already vested on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attained $45.90 per share, and the remaining half of which shall vest on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attains $49.90 per share within the three-year period beginning on the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The Performance-Based portion of the Restricted Stock Units would result in vesting into additional shares (effectively making each performance-based RSU represent two shares) if the average of the daily VWAP over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The Restricted Stock Units are reported as still existing after vesting because they could, as set forth in footnote 4 above, result in vesting into additional shares."}],"balance_after":58600,"derivative":{"underlying":"Common stock","underlying_shares":11720},"source":{"system":"sec-edgar","filing":"0001073429-19-000118","document":"wf-form4_155839178589947.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000118/wf-form4_155839178589947.xml","form_type":"4"}},{"id":3518994,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2019-05-20T18:36:40.000Z","date":"2019-05-16","kind":"tax_withholding","acquired":false,"shares":4611,"price":48.75,"value":224786.25,"ownership":{"direct":true},"balance_after":387706,"source":{"system":"sec-edgar","filing":"0001073429-19-000118","document":"wf-form4_155839178589947.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000118/wf-form4_155839178589947.xml","form_type":"4"}},{"id":3518993,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common stock","published_at":"2019-05-20T18:36:40.000Z","date":"2019-05-16","kind":"exercise","acquired":true,"shares":11720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The first Performance-Based target of a 20-day consecutive trading-day threshold of $45.90 was achieved."}],"balance_after":392317,"source":{"system":"sec-edgar","filing":"0001073429-19-000118","document":"wf-form4_155839178589947.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000118/wf-form4_155839178589947.xml","form_type":"4"}},{"id":3614787,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Restricted stock units","published_at":"2019-03-05T21:23:20.000Z","date":"2019-03-01","kind":"grant","acquired":true,"shares":58600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which shall vest on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attains $45.90 per share within the three-year period beginning on the date of grant, and the remaining half of which shall vest on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attains $49.90 per share within the three-year period beginning on the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The Performance-Based portion of the Restricted Stock Units would result in vesting into additional shares if the average of the daily VWAP over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Restricted Stock Units were granted on March 1, 2019 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which shall vest on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attains $45.90 per share within the three-year period beginning on the date of grant, and the remaining half of which shall vest on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attains $49.90 per share within the three-year period beginning on the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The Performance-Based portion of the Restricted Stock Units would result in vesting into additional shares if the average of the daily VWAP over any period of 20 consecutive trading days attains (i) $54.10 per share (resulting in the vesting into an additional 11,720 shares) and (ii) $58.60 per share (resulting in the vesting into a further additional 11,720 shares) within the three-year period from the date of grant."}],"balance_after":58600,"derivative":{"underlying":"Common stock","underlying_shares":58600},"source":{"system":"sec-edgar","filing":"0001073429-19-000060","document":"wf-form4_155183898675536.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000060/wf-form4_155183898675536.xml","form_type":"4"}},{"id":3614786,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2019-03-05T21:23:20.000Z","date":"2019-03-01","kind":"tax_withholding","acquired":false,"shares":5149,"price":40.86,"value":210388.14,"ownership":{"direct":true},"balance_after":380597,"source":{"system":"sec-edgar","filing":"0001073429-19-000060","document":"wf-form4_155183898675536.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342919000060/wf-form4_155183898675536.xml","form_type":"4"}},{"id":3716329,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-12-31T16:27:24.000Z","date":"2018-08-14","kind":"gift","acquired":false,"shares":560,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":385746,"source":{"system":"sec-edgar","filing":"0001073429-18-000230","document":"wf-form4_154629160021021.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000230/wf-form4_154629160021021.xml","form_type":"4"}},{"id":3716328,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-12-31T16:27:24.000Z","date":"2018-08-13","kind":"gift","acquired":true,"shares":287,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Reporting Person as UGMA custodian for granddaughter"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction involved a gift of securities by the reporting person to his granddaughter, a minor, and is a transfer to the reporting person as custodian for his granddaughter under the Uniform Gifts to Minors Act.  The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose."}],"balance_after":672,"source":{"system":"sec-edgar","filing":"0001073429-18-000230","document":"wf-form4_154629160021021.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000230/wf-form4_154629160021021.xml","form_type":"4"}},{"id":3716327,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-12-31T16:27:24.000Z","date":"2018-08-13","kind":"gift","acquired":false,"shares":287,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction involved a gift of securities by the reporting person to his granddaughter, a minor, and is a transfer to the reporting person as custodian for his granddaughter under the Uniform Gifts to Minors Act.  The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose."}],"balance_after":386306,"source":{"system":"sec-edgar","filing":"0001073429-18-000230","document":"wf-form4_154629160021021.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000230/wf-form4_154629160021021.xml","form_type":"4"}},{"id":3716326,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-12-31T16:27:24.000Z","date":"2018-08-13","kind":"gift","acquired":false,"shares":1722,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":386593,"source":{"system":"sec-edgar","filing":"0001073429-18-000230","document":"wf-form4_154629160021021.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000230/wf-form4_154629160021021.xml","form_type":"4"}},{"id":3859243,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-07-30T17:06:40.000Z","date":"2018-07-26","kind":"sale","acquired":false,"shares":2355,"price":52.05,"value":122577.75,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $51.85 to $52.45, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3)."}],"balance_after":388315,"source":{"system":"sec-edgar","filing":"0001073429-18-000148","document":"wf-form4_153298478394821.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000148/wf-form4_153298478394821.xml","form_type":"4"}},{"id":3859242,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-07-30T17:06:40.000Z","date":"2018-07-26","kind":"sale","acquired":false,"shares":6645,"price":51.24,"value":340489.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $50.85 to $51.8250, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2)."}],"balance_after":390670,"source":{"system":"sec-edgar","filing":"0001073429-18-000148","document":"wf-form4_153298478394821.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000148/wf-form4_153298478394821.xml","form_type":"4"}},{"id":3879245,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-07-02T16:50:10.000Z","date":"2018-06-28","kind":"sale","acquired":false,"shares":551,"price":51.3,"value":28266.3,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $51.20 to $51.40, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4)."}],"balance_after":397315,"source":{"system":"sec-edgar","filing":"0001073429-18-000134","document":"wf-form4_153056459389090.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000134/wf-form4_153056459389090.xml","form_type":"4"}},{"id":3879244,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-07-02T16:50:10.000Z","date":"2018-06-28","kind":"sale","acquired":false,"shares":6049,"price":50.64,"value":306321.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $50.1750 to $51.15, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3)."}],"balance_after":397866,"source":{"system":"sec-edgar","filing":"0001073429-18-000134","document":"wf-form4_153056459389090.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000134/wf-form4_153056459389090.xml","form_type":"4"}},{"id":3879243,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-07-02T16:50:10.000Z","date":"2018-06-28","kind":"sale","acquired":false,"shares":2400,"price":49.54,"value":118896.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $49.10 to $50.00, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2)."}],"balance_after":403915,"source":{"system":"sec-edgar","filing":"0001073429-18-000134","document":"wf-form4_153056459389090.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000134/wf-form4_153056459389090.xml","form_type":"4"}},{"id":3915860,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-05-29T21:26:34.000Z","date":"2018-05-29","kind":"purchase","acquired":true,"shares":5734,"price":46.42,"value":266172.28,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares purchased; full information regarding the number of shares purchased and specific prices will be made available upon request to the Company's Office of the General Counsel."}],"balance_after":13453,"source":{"system":"sec-edgar","filing":"0001179110-18-007625","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000117911018007625/edgar.xml","form_type":"4"}},{"id":3915859,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-05-29T21:26:34.000Z","date":"2018-05-25","kind":"purchase","acquired":true,"shares":4266,"price":45.87,"value":195681.42,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the average price of shares purchased; full information regarding the number of shares purchased and specific prices will be made available upon request to the Company's Office of the General Counsel."}],"balance_after":7719,"source":{"system":"sec-edgar","filing":"0001179110-18-007625","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000117911018007625/edgar.xml","form_type":"4"}},{"id":3916013,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-05-29T17:13:05.000Z","date":"2018-05-24","kind":"sale","acquired":false,"shares":1297,"price":58.42,"value":75770.74,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $58.25 to $58.70, inclusive. The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3)."}],"balance_after":406315,"source":{"system":"sec-edgar","filing":"0001073429-18-000128","document":"wf-form4_152762832284988.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000128/wf-form4_152762832284988.xml","form_type":"4"}},{"id":3916012,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-05-29T17:13:05.000Z","date":"2018-05-24","kind":"sale","acquired":false,"shares":7703,"price":57.84,"value":445541.52,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $57.25 to $58.20, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2)."}],"balance_after":407612,"source":{"system":"sec-edgar","filing":"0001073429-18-000128","document":"wf-form4_152762832284988.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000128/wf-form4_152762832284988.xml","form_type":"4"}},{"id":3920852,"issuer":{"id":3020,"kind":"organization","name":"COMFORT SYSTEMS USA INC"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-05-23T18:58:04.000Z","date":"2018-05-22","kind":"grant","acquired":true,"shares":3453,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $160,000 as rounded down to the nearest whole share based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."}],"balance_after":3453,"source":{"system":"sec-edgar","filing":"0001179110-18-007411","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1035983/000117911018007411/edgar.xml","form_type":"4"}},{"id":3953955,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-04-30T16:23:32.000Z","date":"2018-04-26","kind":"sale","acquired":false,"shares":2295,"price":58.95,"value":135290.25,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $58.90 to $59.10, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote(3)."}],"balance_after":415315,"source":{"system":"sec-edgar","filing":"0001073429-18-000114","document":"wf-form4_152511979813065.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000114/wf-form4_152511979813065.xml","form_type":"4"}},{"id":3953954,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-04-30T16:23:32.000Z","date":"2018-04-26","kind":"sale","acquired":false,"shares":6705,"price":58.64,"value":393181.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $57.90 to $58.85, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2)."}],"balance_after":417610,"source":{"system":"sec-edgar","filing":"0001073429-18-000114","document":"wf-form4_152511979813065.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000114/wf-form4_152511979813065.xml","form_type":"4"}},{"id":3974107,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-04-03T19:18:36.000Z","date":"2018-04-01","kind":"tax_withholding","acquired":false,"shares":4046,"price":60.4,"value":244378.4,"ownership":{"direct":true},"balance_after":424315,"source":{"system":"sec-edgar","filing":"0001073429-18-000107","document":"wf-form4_152279748249633.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000107/wf-form4_152279748249633.xml","form_type":"4"}},{"id":3983285,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-03-26T18:11:40.000Z","date":"2018-03-22","kind":"sale","acquired":false,"shares":1753,"price":61.48,"value":107774.44,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $61.20 to $61.75, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3)."}],"balance_after":428361,"source":{"system":"sec-edgar","filing":"0001073429-18-000079","document":"wf-form4_152210227136003.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000079/wf-form4_152210227136003.xml","form_type":"4"}},{"id":3983284,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-03-26T18:11:40.000Z","date":"2018-03-22","kind":"sale","acquired":false,"shares":7247,"price":60.59,"value":439095.73,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $60.15 to $61.10, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2)."}],"balance_after":430114,"source":{"system":"sec-edgar","filing":"0001073429-18-000079","document":"wf-form4_152210227136003.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000079/wf-form4_152210227136003.xml","form_type":"4"}},{"id":4016759,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-03-05T15:36:40.000Z","date":"2018-03-01","kind":"tax_withholding","acquired":false,"shares":1922,"price":69.75,"value":134059.5,"ownership":{"direct":true},"balance_after":437361,"source":{"system":"sec-edgar","filing":"0001073429-18-000068","document":"wf-form4_152028217970353.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000068/wf-form4_152028217970353.xml","form_type":"4"}},{"id":4016758,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-03-05T15:36:40.000Z","date":"2018-03-01","kind":"tax_withholding","acquired":false,"shares":1934,"price":69.75,"value":134896.5,"ownership":{"direct":true},"balance_after":439283,"source":{"system":"sec-edgar","filing":"0001073429-18-000068","document":"wf-form4_152028217970353.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000068/wf-form4_152028217970353.xml","form_type":"4"}},{"id":4016757,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-03-05T15:36:40.000Z","date":"2018-03-01","kind":"grant","acquired":true,"shares":33500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents restricted shares granted under the Company's Long Term Incentive Plan, to vest as follows: (i) 60% of the total number of the awarded shares are Time-Based Restricted Stock that will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based Restricted Stock, half (or 50%) of which shall vest on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attains $91.10 per share within the three-year period beginning on the date of grant, and the remaining half of which shall vest on the day that the average of the daily volume-weighted average share price of the Company's stock over any period of 20 consecutive trading days attains $99.10 per share within the three-year period beginning on the date of grant."}],"balance_after":441217,"source":{"system":"sec-edgar","filing":"0001073429-18-000068","document":"wf-form4_152028217970353.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000068/wf-form4_152028217970353.xml","form_type":"4"}},{"id":4034737,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-02-26T13:52:04.000Z","date":"2018-02-22","kind":"sale","acquired":false,"shares":6539,"price":75.8044,"value":495684.9716,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $75.35 to $76.25, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3)."}],"balance_after":407717,"source":{"system":"sec-edgar","filing":"0001073429-18-000040","document":"wf-form4_151967111055819.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000040/wf-form4_151967111055819.xml","form_type":"4"}},{"id":4034736,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-02-26T13:52:04.000Z","date":"2018-02-22","kind":"sale","acquired":false,"shares":2461,"price":74.7697,"value":184008.2317,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $74.35 to $75.25, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2)."}],"balance_after":414256,"source":{"system":"sec-edgar","filing":"0001073429-18-000040","document":"wf-form4_151967111055819.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000040/wf-form4_151967111055819.xml","form_type":"4"}},{"id":4086846,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-29T17:41:59.000Z","date":"2018-01-25","kind":"sale","acquired":false,"shares":100,"price":83.85,"value":8385.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."}],"balance_after":416717,"source":{"system":"sec-edgar","filing":"0001073429-18-000030","document":"wf-form4_151726570535653.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000030/wf-form4_151726570535653.xml","form_type":"4"}},{"id":4086845,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-29T17:41:59.000Z","date":"2018-01-25","kind":"sale","acquired":false,"shares":4136,"price":83.0234,"value":343384.7824,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $82.65 to $83.60, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4)."}],"balance_after":416817,"source":{"system":"sec-edgar","filing":"0001073429-18-000030","document":"wf-form4_151726570535653.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000030/wf-form4_151726570535653.xml","form_type":"4"}},{"id":4086844,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-29T17:41:59.000Z","date":"2018-01-25","kind":"sale","acquired":false,"shares":2757,"price":82.2091,"value":226650.4887,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $81.65 to $82.60, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3)."}],"balance_after":420953,"source":{"system":"sec-edgar","filing":"0001073429-18-000030","document":"wf-form4_151726570535653.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000030/wf-form4_151726570535653.xml","form_type":"4"}},{"id":4086843,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-29T17:41:59.000Z","date":"2018-01-25","kind":"sale","acquired":false,"shares":2007,"price":81.2059,"value":162980.2413,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $80.65 to $81.55, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2)."}],"balance_after":423710,"source":{"system":"sec-edgar","filing":"0001073429-18-000030","document":"wf-form4_151726570535653.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000030/wf-form4_151726570535653.xml","form_type":"4"}},{"id":4096839,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-18T14:07:40.000Z","date":"2017-03-22","kind":"sale","acquired":false,"shares":1034,"price":66.4587,"value":68718.2958,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 26, 2015."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $66.40 to $66.65, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4)."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"This amendment has been filed to correct the amount of securities beneficially owned following this reported transaction to 485,346, not 454,705 as previously reported."}],"balance_after":485346,"source":{"system":"sec-edgar","filing":"0001073429-18-000024","document":"wf-form4a_151630244633751.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000024/wf-form4a_151630244633751.xml","form_type":"4/A","original_submission_date":"2017-03-23"}},{"id":4096838,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-18T14:07:40.000Z","date":"2017-03-22","kind":"sale","acquired":false,"shares":5466,"price":65.8756,"value":360076.0296,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 26, 2015."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $65.40 to $66.35, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote(2)."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"This amendment has been filed to correct the amount of securities beneficially owned following this reported transaction to 486,380, not 455,739 as previously reported."}],"balance_after":486380,"source":{"system":"sec-edgar","filing":"0001073429-18-000024","document":"wf-form4a_151630244633751.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000024/wf-form4a_151630244633751.xml","form_type":"4/A","original_submission_date":"2017-03-23"}},{"id":4117671,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-02T18:34:37.000Z","date":"2017-11-22","kind":"gift","acquired":true,"shares":185,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Reporting Person as UGMA custodian for granddaughter"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This amendment is being filed to correct the reporting of this line item as voluntary and therefore to correct the Date of Earliest Transaction in Box 3 (previously reported as 11/22/17) to 12/28/17, which is the correct date of the reporting person's earliest transaction required to be reported on this Form 4."},{"field":"kind","element":"transactionCoding","label":"F2","text":"This transaction involved a gift of securities by the reporting person to his granddaughter, a minor, and is a transfer to the reporting person as custodian for his granddaughter under the Uniform Gifts to Minors Act.  The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose."}],"balance_after":385,"source":{"system":"sec-edgar","filing":"0001073429-18-000004","document":"wf-form4a_151493606345700.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000004/wf-form4a_151493606345700.xml","form_type":"4/A","original_submission_date":"2018-01-02"}},{"id":4117670,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-02T16:47:44.000Z","date":"2017-11-22","kind":"gift","acquired":true,"shares":185,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Reporting Person as UGMA custodian for granddaughter"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction involved a gift of securities by the reporting person to his granddaughter, a minor, and is a transfer to the reporting person as custodian for his granddaughter under the Uniform Gifts to Minors Act.  The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose."}],"balance_after":385,"source":{"system":"sec-edgar","filing":"0001073429-18-000002","document":"wf-form4_151492965092247.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000002/wf-form4_151492965092247.xml","form_type":"4"}},{"id":4117669,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-02T16:47:44.000Z","date":"2017-12-28","kind":"sale","acquired":false,"shares":100,"price":83.5,"value":8350.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."}],"balance_after":395076,"source":{"system":"sec-edgar","filing":"0001073429-18-000002","document":"wf-form4_151492965092247.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000002/wf-form4_151492965092247.xml","form_type":"4"}},{"id":4117668,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-02T16:47:44.000Z","date":"2017-12-28","kind":"sale","acquired":false,"shares":8900,"price":82.9013,"value":737821.57,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $82.30 to $83.15, inclusive.  The reporting person undertakes to provide to U.S. Concrete, Inc., any security holder of U.S. Concrete, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2)."}],"balance_after":395176,"source":{"system":"sec-edgar","filing":"0001073429-18-000002","document":"wf-form4_151492965092247.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000002/wf-form4_151492965092247.xml","form_type":"4"}},{"id":4117667,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-02T16:47:44.000Z","date":"2017-12-19","kind":"gift","acquired":false,"shares":6350,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":404076,"source":{"system":"sec-edgar","filing":"0001073429-18-000002","document":"wf-form4_151492965092247.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000002/wf-form4_151492965092247.xml","form_type":"4"}},{"id":4117666,"issuer":{"id":135936,"kind":"organization","name":"U.S. CONCRETE, INC.","symbol":"USCR"},"owners":[{"id":45131,"kind":"person","name":"SANDBROOK WILLIAM J","position":1,"cik":"0001527678","reported_name":"SANDBROOK WILLIAM J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice Chairman, President & CEO"}}],"security":"Common stock","published_at":"2018-01-02T16:47:44.000Z","date":"2017-11-22","kind":"gift","acquired":false,"shares":185,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction involved a gift of securities by the reporting person to his granddaughter, a minor, and is a transfer to the reporting person as custodian for his granddaughter under the Uniform Gifts to Minors Act.  The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose."}],"balance_after":410426,"source":{"system":"sec-edgar","filing":"0001073429-18-000002","document":"wf-form4_151492965092247.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1073429/000107342918000002/wf-form4_151492965092247.xml","form_type":"4"}}],"next_cursor":"2018-01-02T16:47:44.000000Z,4117666"}