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UNITIL CORP — All Filings

1,000 total filings on record

Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.

Overview All Filings Financials Insiders
All 10-K 10-K/A 10-Q 11-K 11-K/A 25 3 35-CERT 4 4/A 424B4 424B5 5 5/A 8-A12B/A 8-K 8-K/A ARS CERTNYS CORRESP DEF 14A DEFA14A EFFECT FWP NO ACT NT 10-K POS AMC PRE 14A RW S-3 S-3/A S-3ASR S-3D S-3DPOS S-3MEF S-8 S-8 POS SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13G/A SE U-1 U-1/A U-13-60 U-13-60/A U-6B-2 U-9C-3 U5S UPLOAD
Form Description Accession Number Filed Period
SCHEDULE 13G/A 0000102909-26-002583 Mar 27, 2026
ARS ARS 0001193125-26-128268 Mar 27, 2026 Dec 31, 2025
DEF 14A DEF 14A 0001193125-26-128263 Mar 27, 2026 Apr 29, 2026
8-K 8-K 0001193125-26-067209 Feb 24, 2026 Feb 19, 2026
424B5 424B5 0001193125-26-059567 Feb 19, 2026
10-K 10-K 0001193125-26-042983 Feb 9, 2026 Dec 31, 2025
8-K 8-K 0001193125-26-033824 Feb 2, 2026 Jan 27, 2026
4 4 0001193125-26-029594 Jan 29, 2026 Jan 27, 2026
4 4 0001193125-26-029565 Jan 29, 2026 Jan 27, 2026
4 4 0001193125-26-029548 Jan 29, 2026 Jan 27, 2026
4 4 0001193125-26-029501 Jan 29, 2026 Jan 27, 2026
4 4 0001193125-26-029475 Jan 29, 2026 Jan 27, 2026
8-K 8-K 0001193125-26-029469 Jan 29, 2026 Jan 23, 2026
4 4 0001193125-26-029437 Jan 29, 2026 Jan 27, 2026
4 4 0001193125-26-029406 Jan 29, 2026 Jan 27, 2026
8-K 8-K 0001193125-25-324977 Dec 18, 2025 Dec 15, 2025
3 3 0001193125-25-266629 Nov 5, 2025 Oct 29, 2025
8-K 8-K 0001193125-25-264824 Nov 4, 2025 Oct 29, 2025
8-K 8-K 0001193125-25-262797 Nov 3, 2025 Oct 31, 2025
10-Q 10-Q 0001193125-25-262745 Nov 3, 2025 Sep 30, 2025
4 4 0001193125-25-229636 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229630 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229598 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229535 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229522 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229508 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229499 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229493 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229488 Oct 3, 2025 Oct 1, 2025
4 4 0001193125-25-229474 Oct 3, 2025 Oct 1, 2025
8-K 8-K 0001193125-25-181993 Aug 18, 2025 Aug 14, 2025
424B5 424B5 0001193125-25-181992 Aug 18, 2025
424B5 424B5 0001193125-25-180794 Aug 14, 2025
10-Q 10-Q 0000950170-25-102121 Aug 4, 2025 Jun 30, 2025
8-K 8-K 0001193125-25-158782 Jul 14, 2025 Jul 8, 2025
11-K 11-K 0001193125-25-146416 Jun 25, 2025 Dec 31, 2024
8-K 8-K 0001193125-25-134288 Jun 4, 2025 Jun 3, 2025
424B5 424B5 0001193125-25-134192 Jun 3, 2025
S-3ASR S-3ASR 0001193125-25-134183 Jun 3, 2025
8-K 8-K 0001193125-25-117855 May 12, 2025 May 6, 2025
10-Q 10-Q 0000950170-25-064590 May 6, 2025 Mar 31, 2025
8-K 8-K 0001193125-25-112835 May 5, 2025 Apr 30, 2025
3 3 0000950170-25-061758 May 1, 2025 Apr 30, 2025
8-K 8-K 0001193125-25-105646 Apr 30, 2025
SCHEDULE 13G/A 0002052113-25-001659 Apr 24, 2025
UPLOAD 0000000000-25-004008 Apr 16, 2025
8-K 8-K 0001193125-25-073493 Apr 4, 2025 Mar 31, 2025
ARS ARS 0001193125-25-066468 Mar 28, 2025 Dec 31, 2024
DEF 14A DEF 14A 0001193125-25-066425 Mar 28, 2025 Apr 30, 2025
CORRESP 0001193125-25-058439 Mar 20, 2025