{"cik":755001,"company":{"entity_status":null,"filings":[{"accession":"0000755001-26-000029","document":"utl-20260630.htm","filed":"2026-08-03","form":"10-Q","items":"","report_date":"2026-06-30"},{"accession":"0000755001-26-000026","document":"utl-20260630.htm","filed":"2026-07-07","form":"8-K","items":"1.01,2.03,7.01,8.01,9.01","report_date":"2026-06-30"},{"accession":"0000755001-26-000019","document":"utl-20260525.htm","filed":"2026-05-27","form":"8-K","items":"1.01,9.01","report_date":"2026-05-25"},{"accession":"0000755001-26-000016","document":"utl-20260515.htm","filed":"2026-05-15","form":"8-K","items":"7.01,9.01","report_date":"2026-05-15"},{"accession":"0000755001-26-000012","document":"utl-20260430.htm","filed":"2026-05-05","form":"8-K","items":"1.01,2.03,9.01","report_date":"2026-04-30"},{"accession":"0000755001-26-000010","document":"utl-20260331.htm","filed":"2026-05-04","form":"10-Q","items":"","report_date":"2026-03-31"},{"accession":"0000755001-26-000008","document":"utl-20260429.htm","filed":"2026-05-01","form":"8-K","items":"5.07","report_date":"2026-04-29"},{"accession":"0000755001-26-000004","document":"utl-20260429.htm","filed":"2026-04-29","form":"8-K","items":"7.01,9.01","report_date":"2026-04-29"},{"accession":"0001193125-26-128263","document":"d54836ddef14a.htm","filed":"2026-03-27","form":"DEF 14A","items":"","report_date":"2026-04-29"},{"accession":"0001193125-26-067209","document":"d745372d8k.htm","filed":"2026-02-24","form":"8-K","items":"1.01,9.01","report_date":"2026-02-19"},{"accession":"0001193125-26-042983","document":"utl-20251231.htm","filed":"2026-02-09","form":"10-K","items":"","report_date":"2025-12-31"},{"accession":"0001193125-26-033824","document":"d930901d8k.htm","filed":"2026-02-02","form":"8-K","items":"1.01,5.02,9.01","report_date":"2026-01-27"},{"accession":"0001193125-26-029594","document":"xslF345X05/ownership.xml","filed":"2026-01-29","form":"4","items":"","report_date":"2026-01-27"},{"accession":"0001193125-26-029565","document":"xslF345X05/ownership.xml","filed":"2026-01-29","form":"4","items":"","report_date":"2026-01-27"},{"accession":"0001193125-26-029548","document":"xslF345X05/ownership.xml","filed":"2026-01-29","form":"4","items":"","report_date":"2026-01-27"},{"accession":"0001193125-26-029501","document":"xslF345X05/ownership.xml","filed":"2026-01-29","form":"4","items":"","report_date":"2026-01-27"},{"accession":"0001193125-26-029475","document":"xslF345X05/ownership.xml","filed":"2026-01-29","form":"4","items":"","report_date":"2026-01-27"},{"accession":"0001193125-26-029469","document":"d18575d8k.htm","filed":"2026-01-29","form":"8-K","items":"1.01,9.01","report_date":"2026-01-23"},{"accession":"0001193125-26-029437","document":"xslF345X05/ownership.xml","filed":"2026-01-29","form":"4","items":"","report_date":"2026-01-27"},{"accession":"0001193125-26-029406","document":"xslF345X05/ownership.xml","filed":"2026-01-29","form":"4","items":"","report_date":"2026-01-27"},{"accession":"0001193125-25-324977","document":"d75514d8k.htm","filed":"2025-12-18","form":"8-K","items":"7.01,8.01","report_date":"2025-12-15"},{"accession":"0001193125-25-264824","document":"d58414d8k.htm","filed":"2025-11-04","form":"8-K","items":"5.02","report_date":"2025-10-29"},{"accession":"0001193125-25-262797","document":"d38770d8k.htm","filed":"2025-11-03","form":"8-K","items":"1.01,2.03,7.01,8.01,9.01","report_date":"2025-10-31"},{"accession":"0001193125-25-262745","document":"utl-20250930.htm","filed":"2025-11-03","form":"10-Q","items":"","report_date":"2025-09-30"},{"accession":"0001193125-25-229636","document":"xslF345X05/ownership.xml","filed":"2025-10-03","form":"4","items":"","report_date":"2025-10-01"},{"accession":"0001193125-25-181993","document":"d88254d8k.htm","filed":"2025-08-18","form":"8-K","items":"1.01,7.01,9.01","report_date":"2025-08-14"},{"accession":"0000950170-25-102121","document":"utl-20250630.htm","filed":"2025-08-04","form":"10-Q","items":"","report_date":"2025-06-30"},{"accession":"0001193125-25-158782","document":"d42911d8k.htm","filed":"2025-07-14","form":"8-K","items":"1.01,2.03,9.01","report_date":"2025-07-08"},{"accession":"0001193125-25-134288","document":"d121120d8k.htm","filed":"2025-06-04","form":"8-K","items":"1.01,9.01","report_date":"2025-06-03"},{"accession":"0001193125-25-117855","document":"d945468d8k.htm","filed":"2025-05-12","form":"8-K","items":"1.01,2.03,7.01,9.01","report_date":"2025-05-06"},{"accession":"0000950170-25-064590","document":"utl-20250331.htm","filed":"2025-05-06","form":"10-Q","items":"","report_date":"2025-03-31"},{"accession":"0001193125-25-112835","document":"d53498d8k.htm","filed":"2025-05-05","form":"8-K","items":"5.07","report_date":"2025-04-30"},{"accession":"0001193125-25-105646","document":"d871285d8k.htm","filed":"2025-04-30","form":"8-K","items":"7.01,9.01","report_date":"2025-04-30"},{"accession":"0001193125-25-073493","document":"d946977d8k.htm","filed":"2025-04-04","form":"8-K","items":"1.01,2.03,7.01,9.01","report_date":"2025-03-31"},{"accession":"0001193125-25-066425","document":"d919408ddef14a.htm","filed":"2025-03-28","form":"DEF 14A","items":"","report_date":"2025-04-30"},{"accession":"0000950170-25-017154","document":"utl-20241231.htm","filed":"2025-02-10","form":"10-K","items":"","report_date":"2024-12-31"},{"accession":"0001193125-25-020122","document":"d900757d8k.htm","filed":"2025-02-04","form":"8-K","items":"1.01,2.03,7.01,8.01,9.01","report_date":"2025-01-29"},{"accession":"0001193125-24-251276","document":"d891602d8k.htm","filed":"2024-11-05","form":"8-K","items":"5.02,7.01,9.01","report_date":"2024-10-30"},{"accession":"0000950170-24-120859","document":"utl-20240930.htm","filed":"2024-11-04","form":"10-Q","items":"","report_date":"2024-09-30"},{"accession":"0001193125-24-207775","document":"d227567d8k.htm","filed":"2024-08-27","form":"8-K","items":"1.01,2.03,9.01","report_date":"2024-08-21"}],"former_names":[],"gleif_parents":[],"headquarters":[{"latitude":42.9375,"longitude":-70.838888888889,"name":"Hampton","precision":"headquarters locality","source":"wikidata","url":"https://www.wikidata.org/wiki/Q945362"}],"insiders":[],"legal_name":null,"lei":null,"lei_status":null,"lei_updated_at":null,"names":[{"entity_id":null,"kind":"alias","name":"Unitil Corporation","source":"wikidata"},{"entity_id":null,"kind":"alias","name":"Portland Gas Light Company","source":"wikidata"}],"parent_exceptions":[],"parents":[],"wikidata_id":"Q17144598"},"research_built_at":"2026-09-08T00:28:31.573928+00:00","sources":[{"coverage":"8005 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer","id":"sec","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC submissions","retrieved_at":"2026-09-08T00:28:36.996621+00:00","status":"ok","url":"https://www.sec.gov/search-filings/edgar-application-programming-interfaces"},{"coverage":"1611 unambiguous CIK-linked entities; coverage is incomplete","id":"wikidata","license":"CC0-1.0","license_url":"https://www.wikidata.org/wiki/Wikidata:Licensing","name":"Wikidata structured data","retrieved_at":"2026-09-07T20:33:33.971872+00:00","status":"ok","url":"https://www.wikidata.org/"},{"coverage":"1177 checked identities; 0 unavailable records","id":"gleif","license":"CC0-1.0","license_url":"https://www.gleif.org/en/meta/lei-data-terms-of-use","name":"GLEIF legal entity reference data","retrieved_at":"2026-09-07T20:35:11.504394+00:00","status":"ok","url":"https://www.gleif.org/en/lei-data/gleif-api"},{"coverage":"4 selected series; gaps remain missing","id":"fed","license":"Public domain (selected government series)","license_url":"https://www.federalreserve.gov/disclaimer.htm","name":"Federal Reserve Board H.15","retrieved_at":"2026-09-08T00:28:58.131796+00:00","status":"ok","url":"https://www.federalreserve.gov/releases/h15/"},{"coverage":"9 selected series; gaps remain missing","id":"bls","license":"Public domain","license_url":"https://www.bls.gov/opub/copyright-information.htm","name":"Bureau of Labor Statistics","retrieved_at":"2026-09-08T00:28:59.313116+00:00","status":"ok","url":"https://www.bls.gov/developers/"},{"coverage":"2026 Q2: filings in this completed quarter; not a live transaction feed","id":"insiders","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC insider transactions","retrieved_at":"2026-09-07T20:35:31.647091+00:00","status":"ok","url":"https://www.sec.gov/data-research/sec-markets-data/insider-transactions-data-sets"}]}