{"filing":{"accession_number":"0001104659-26-070593","cik":"0000894405","ticker":"ARCB","company_name":"ARCBEST CORP /DE/","form":"8-K","filing_date":"2026-06-04","report_date":null,"primary_document":"arcb-20260604x8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/894405/000110465926070593/arcb-20260604x8k.htm"},"events":[{"id":3346,"run_id":2929,"accession_number":"0001104659-26-070593","anchor_item_number":"7.01","event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"summary":"ArcBest is providing a detailed operational update on Q2 2026 performance through May, including year-over-year and sequential trends for both Asset-Based and Asset-Light segments, along with forward-looking guidance on operating income and operating ratio improvements. While this is disclosed under Item 7.01 (Regulation FD Disclosure) rather than a formal earnings release, the granular operational metrics, revenue trends, and specific Q2 guidance (e.g., Asset-Light operating income of $3–5 million) constitute material business information that would affect a reasonable investor's assessment of near-term performance and trends. The disclosure does not fit neatly into earnings_release (no full financial statements or formal press release format) but is clearly material forward-looking guidance on operational performance.","company_name":"ARCBEST CORP /DE/","ticker":"ARCB","filing_date":"2026-06-04","items":[{"id":4274,"accession_number":"0001104659-26-070593","item_number":"7.01","item_title":"REGULATION FD DISCLOSURE","event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"reasoning":"ArcBest is providing a detailed operational update on Q2 2026 performance through May, including year-over-year and sequential trends for both Asset-Based and Asset-Light segments, along with forward-looking guidance on operating income and operating ratio improvements. While this is disclosed under Item 7.01 (Regulation FD Disclosure) rather than a formal earnings release, the granular operational metrics, revenue trends, and specific Q2 guidance (e.g., Asset-Light operating income of $3–5 million) constitute material business information that would affect a reasonable investor's assessment of near-term performance and trends. The disclosure does not fit neatly into earnings_release (no full financial statements or formal press release format) but is clearly material forward-looking guidance on operational performance.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-05T04:53:34.022142+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":4274,"accession_number":"0001104659-26-070593","item_number":"7.01","item_title":"REGULATION FD DISCLOSURE","event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"reasoning":"ArcBest is providing a detailed operational update on Q2 2026 performance through May, including year-over-year and sequential trends for both Asset-Based and Asset-Light segments, along with forward-looking guidance on operating income and operating ratio improvements. While this is disclosed under Item 7.01 (Regulation FD Disclosure) rather than a formal earnings release, the granular operational metrics, revenue trends, and specific Q2 guidance (e.g., Asset-Light operating income of $3–5 million) constitute material business information that would affect a reasonable investor's assessment of near-term performance and trends. The disclosure does not fit neatly into earnings_release (no full financial statements or formal press release format) but is clearly material forward-looking guidance on operational performance.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-05T04:53:34.022142+00:00","company_name":"ARCBEST CORP /DE/","ticker":"ARCB","filing_date":"2026-06-04"}]}