{"filing":{"accession_number":"0001104659-26-105900","cik":"0000894405","ticker":"ARCB","company_name":"ARCBEST CORP /TX/","form":"8-K","filing_date":"2026-09-08","report_date":"2026-09-08","primary_document":"arcb-20260908x8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/894405/000110465926105900/arcb-20260908x8k.htm"},"events":[{"id":31952,"run_id":29348,"accession_number":"0001104659-26-105900","anchor_item_number":"7.01","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"summary":"ArcBest is providing preliminary third-quarter 2026 business trends and operating metrics for its two segments (Asset-Based and Asset-Light), including revenue per day, tonnage, shipments, and operating income guidance. This is a business update disclosing operational performance trends and forward-looking guidance that would inform investors about current business momentum and near-term expectations, but it is not a formal earnings release (which would typically be Item 2.02 with a press release exhibit). The disclosure is material to investors assessing operational performance and trends, but the event type does not fit the specific categories of earnings_release, ma_activity, or other named types—it is a strategic operational disclosure of preliminary results and guidance.","company_name":"ARCBEST CORP /TX/","ticker":"ARCB","filing_date":"2026-09-08","form":"8-K","submitted_at":null,"items":[{"id":34995,"accession_number":"0001104659-26-105900","item_number":"7.01","item_title":"REGULATION FD DISCLOSURE","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"ArcBest is providing preliminary third-quarter 2026 business trends and operating metrics for its two segments (Asset-Based and Asset-Light), including revenue per day, tonnage, shipments, and operating income guidance. This is a business update disclosing operational performance trends and forward-looking guidance that would inform investors about current business momentum and near-term expectations, but it is not a formal earnings release (which would typically be Item 2.02 with a press release exhibit). The disclosure is material to investors assessing operational performance and trends, but the event type does not fit the specific categories of earnings_release, ma_activity, or other named types—it is a strategic operational disclosure of preliminary results and guidance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-08T20:07:04.090922+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":34995,"accession_number":"0001104659-26-105900","item_number":"7.01","item_title":"REGULATION FD DISCLOSURE","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"ArcBest is providing preliminary third-quarter 2026 business trends and operating metrics for its two segments (Asset-Based and Asset-Light), including revenue per day, tonnage, shipments, and operating income guidance. This is a business update disclosing operational performance trends and forward-looking guidance that would inform investors about current business momentum and near-term expectations, but it is not a formal earnings release (which would typically be Item 2.02 with a press release exhibit). The disclosure is material to investors assessing operational performance and trends, but the event type does not fit the specific categories of earnings_release, ma_activity, or other named types—it is a strategic operational disclosure of preliminary results and guidance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-08T20:07:04.090922+00:00","company_name":"ARCBEST CORP /TX/","ticker":"ARCB","filing_date":"2026-09-08"}]}