{"schema_version":"secwatch.filing_event.v1","accession":"0000950103-24-000646","form_type":"8-K","ticker":null,"cik":"0001571371","company_name":"Summit Materials, LLC","filed_at":"2024-01-12T23:59:59+00:00","discovered_at":"2026-05-14T18:03:24.658200+00:00","generated_at":"2026-06-06T23:52:58.653443+00:00","sec_items":["2.01","1.01","3.02","3.03","5.02","8.01","9.01"],"event_type":"m_and_a","sentiment":"positive","materiality_score":0.85,"calibrated_materiality_score":0.85,"confidence":"high","headline":"Summit Materials closes $3.2B acquisition of Argos USA, creates national materials platform","bullets":["Consideration: $1.2B cash, 54.72M shares of Class A common, and one preferred share with limited voting rights.","Board expanded: Juan Esteban Calle, Jorge Mario Velásquez, Irene Moshouris appointed; John Murphy resigned.","Brian Frantz appointed Chief Accounting Officer and Senior Vice President.","Debt facilities amended: new $1.01B term loan; revolver increased to $625M with lower margins.","Press release touts 'unrivaled, materials dominant platform' with national scale and synergy focus."],"urls":{"canonical":"https://secwatch.observer/filing/0000950103-24-000646","json":"https://secwatch.observer/filing/0000950103-24-000646.json","markdown":"https://secwatch.observer/filing/0000950103-24-000646.md","text":"https://secwatch.observer/filing/0000950103-24-000646.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/dp205184_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-06T23:52:58.653443+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"02228dfedd","claim":"Brian Frantz was appointed as Chief Accounting Officer and Senior Vice President at Summit Materials, LLC.","evidence_excerpt":"Brian Frantz was appointed as Chief Accounting Officer and Senior Vice President of the Company","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Accounting Officer and Senior Vice President"}],"fact_type":"executive_change"},{"claim_id":"1523d6408c","claim":"John Murphy resigned as Director at Summit Materials, LLC.","evidence_excerpt":"John Murphy resigned from his position as a director of the Company","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"8b4acc3d5e","claim":"Jorge Mario Velásquez was appointed as Director at Summit Materials, LLC.","evidence_excerpt":"Juan Esteban Calle, Jorge Mario Velásquez and Irene Moshouris were appointed as directors of the Company","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"b61386318b","claim":"Juan Esteban Calle was appointed as Director at Summit Materials, LLC.","evidence_excerpt":"Juan Esteban Calle, Jorge Mario Velásquez and Irene Moshouris were appointed as directors of the Company","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"ffab367612","claim":"Irene Moshouris was appointed as Director at Summit Materials, LLC.","evidence_excerpt":"Juan Esteban Calle, Jorge Mario Velásquez and Irene Moshouris were appointed as directors of the Company","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"aa6742663e9c95f4dda83b18026db9c9e8448653","claim":"Summit Materials, LLC completed an acquisition involving Argos Parties for $1.2 billion of cash (closed 2024-01-12).","evidence_excerpt":"share, of the Company (the “Preferred Share”). Pursuant to the Transaction Agreement, the aggregate consideration paid to the Argos Parties in the Transaction consisted of (i) $1.2 billion of cash (subject to customary adjustments) (the “Cash Consideration”), (ii) 54,720,000 shares of Class A Common Stock (the “Class A Consideration”) and (iii) the Preferred Share","evidence_source":"SEC 8-K Item 2.01/5.01","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.9,"family_label":"M&A Transactions","details":[{"label":"Action","value":"acquisition"},{"label":"Counterparty","value":"Argos Parties"},{"label":"Consideration","value":"$1.2 billion of cash"},{"label":"Closing","value":"2024-01-12"}],"fact_type":"ma_transaction"},{"claim_id":"092ab9e355191efed637e4e6e2e5f120442aac03","claim":"Summit Materials, LLC amended Amendment No. 7 to Amended and Restated Credit Agreement with Summit Materials, LLC, guarantors, Bank of America, N.A. as administrative agent valued at Amended credit agreement: established new term loans of $1,010,000,000, increased revolver commitmen (effective 2024-01-12).","evidence_excerpt":"In connection with the Transaction, on January 12, 2024, Summit Materials, LLC (“Summit LLC”), an indirect subsidiary of the Company and the guarantors party thereto entered into Amendment No. 7 (“Amendment No. 7”) to the Amended and Restated Credit Agreement, dated as of July 17, 2015 (together with Amendment No. 1, dated as of January 19, 2017, Amendment No. 2, dated as of November 21, 2017, Amendment No. 3, dated as of May 22, 2018, Amendment No. 4, dated as of February 25, 2019, Amendment No. 5, dated as of December 14, 2022 and Amendment No. 6, dated as of January 10, 2023, the “Credit Agreement”), governing Summit LLC’s senior secured credit facilities, among Summit LLC, as borrower, the guarantors party thereto, the several banks and other financial institutions or entities party thereto, Bank of America, N.A., as administrative agent, collateral agent, L/C issuer and swing line lender and the other parties thereto.","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.95,"family_label":"Material Agreements","details":[{"label":"Action","value":"amendment"},{"label":"Agreement","value":"credit facility"},{"label":"Counterparty","value":"Summit Materials, LLC, guarantors, Bank of America, N.A. as administrative agent"},{"label":"Value","value":"Amended credit agreement: established new term loans of $1,010,000,000, increased revolver commitmen"},{"label":"Effective","value":"2024-01-12"}],"fact_type":"material_agreement"},{"claim_id":"2d9b4f2b15efb007b12750f8823639b900b1133c","claim":"Summit Materials, LLC entered into Stockholder Agreement with Cementos Argos, Argos SEM, Valle Cement and Grupo Argos S.A. valued at Governs stockholder rights and obligations in connection with the transaction (effective 2024-01-12).","evidence_excerpt":"Upon consummation of the Transaction, pursuant to the terms of the Transaction Agreement, the Company, Cementos Argos, Argos SEM, Valle Cement and, solely for the purpose of specified sections of the Stockholder Agreement, Grupo Argos S.A., a sociedad anónima incorporated in the Republic of Colombia, entered into that certain Stockholder Agreement, dated as of January 12, 2024 (the “Stockholder Agreement”).","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.95,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Counterparty","value":"Cementos Argos, Argos SEM, Valle Cement and Grupo Argos S.A."},{"label":"Value","value":"Governs stockholder rights and obligations in connection with the transaction"},{"label":"Effective","value":"2024-01-12"}],"fact_type":"material_agreement"},{"claim_id":"3768bd82d0952c9fda7291a1e97af1fe6531598a","claim":"Summit Materials, LLC entered into Registration Rights Agreement with Cementos Argos, Argos SEM and Valle Cement valued at Granted certain customary shelf, demand and piggy-back registration rights with respect to shares of (effective 2024-01-12).","evidence_excerpt":"Upon consummation of the Transaction, pursuant to the terms of the Transaction Agreement, the Company, Cementos Argos, Argos SEM and Valle Cement (each of Argos SEM and Valle Cement, an “Investor Participant”), entered into that certain Registration Rights Agreement, dated as of January 12, 2024 (the “Registration Rights Agreement”), pursuant to which, among other matters, subject to certain limited exceptions, Cementos Argos and each Investor Participant were granted certain customary shelf, demand and “piggy-back” registration rights with respect to their shares of Class A common stock, par value $0.01 per share, of the Company (“Class A Common Stock”), in each case, on the terms and subject to the conditions described therein.","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1571371/000095010324000646/0000950103-24-000646-index.htm","confidence":0.95,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Counterparty","value":"Cementos Argos, Argos SEM and Valle Cement"},{"label":"Value","value":"Granted certain customary shelf, demand and piggy-back registration rights with respect to shares of"},{"label":"Effective","value":"2024-01-12"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}