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.
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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 | — |