# Filing Detail

Form DEF 14A - Other definitive proxy statements:
SEC Accession No. 0001193125-26-128263
Filing Date
2026-03-27
Accepted
2026-03-27 13:00:28
Documents
63
Period of Report
2026-04-29

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | DEF 14A | d54836ddef14a.htm iXBRL | DEF 14A | 1815135
3 | GRAPHIC | g54836ap40ii.jpg | GRAPHIC | 1136
4 | GRAPHIC | g54836g01g15.jpg | GRAPHIC | 186119
5 | GRAPHIC | g54836g01k22.jpg | GRAPHIC | 37666
6 | GRAPHIC | g54836g01k83.jpg | GRAPHIC | 116276
7 | GRAPHIC | g54836g01k84.jpg | GRAPHIC | 101521
8 | GRAPHIC | g54836g01m40.jpg | GRAPHIC | 13465
9 | GRAPHIC | g54836g01m41.jpg | GRAPHIC | 3404
10 | GRAPHIC | g54836g02g15.jpg | GRAPHIC | 67266
11 | GRAPHIC | g54836g02m40.jpg | GRAPHIC | 2440
12 | GRAPHIC | g54836g02m41.jpg | GRAPHIC | 3425
13 | GRAPHIC | g54836g02p02.jpg | GRAPHIC | 39102
14 | GRAPHIC | g54836g02z63.jpg | GRAPHIC | 20758
15 | GRAPHIC | g54836g06g06.jpg | GRAPHIC | 174521
16 | GRAPHIC | g54836g07t99.jpg | GRAPHIC | 38772
17 | GRAPHIC | g54836g11f79.jpg | GRAPHIC | 34126
18 | GRAPHIC | g54836g11q02.jpg | GRAPHIC | 36839
19 | GRAPHIC | g54836g15p03.jpg | GRAPHIC | 82402
20 | GRAPHIC | g54836g15p05.jpg | GRAPHIC | 109090
21 | GRAPHIC | g54836g15p06.jpg | GRAPHIC | 37466
22 | GRAPHIC | g54836g15p07.jpg | GRAPHIC | 602464
23 | GRAPHIC | g54836g15p08.jpg | GRAPHIC | 52879
24 | GRAPHIC | g54836g15p09.jpg | GRAPHIC | 143632
25 | GRAPHIC | g54836g15p10.jpg | GRAPHIC | 103014
26 | GRAPHIC | g54836g15p11.jpg | GRAPHIC | 225064
27 | GRAPHIC | g54836g17g70.jpg | GRAPHIC | 42068
28 | GRAPHIC | g54836g18g00.jpg | GRAPHIC | 78448
29 | GRAPHIC | g54836g20g03.jpg | GRAPHIC | 26474
30 | GRAPHIC | g54836g20g20.jpg | GRAPHIC | 62877
31 | GRAPHIC | g54836g20i56.jpg | GRAPHIC | 20736
32 | GRAPHIC | g54836g21g80.jpg | GRAPHIC | 47495
33 | GRAPHIC | g54836g21p01.jpg | GRAPHIC | 112906
34 | GRAPHIC | g54836g21p02.jpg | GRAPHIC | 481002
35 | GRAPHIC | g54836g25a01.jpg | GRAPHIC | 86347
36 | GRAPHIC | g54836g26g01.jpg | GRAPHIC | 34657
37 | GRAPHIC | g54836g26x47.jpg | GRAPHIC | 41049
38 | GRAPHIC | g54836g29g29.jpg | GRAPHIC | 244809
39 | GRAPHIC | g54836g37c90.jpg | GRAPHIC | 25722
40 | GRAPHIC | g54836g56g01.jpg | GRAPHIC | 52479
41 | GRAPHIC | g54836g56n02.jpg | GRAPHIC | 27266
42 | GRAPHIC | g54836g57g01.jpg | GRAPHIC | 27879
43 | GRAPHIC | g54836g57g02.jpg | GRAPHIC | 27558
44 | GRAPHIC | g54836g57g03.jpg | GRAPHIC | 30574
45 | GRAPHIC | g54836g57g04.jpg | GRAPHIC | 26775
46 | GRAPHIC | g54836g58g58.jpg | GRAPHIC | 122020
47 | GRAPHIC | g54836g62b92.jpg | GRAPHIC | 45052
48 | GRAPHIC | g54836g84y69.jpg | GRAPHIC | 67024
49 | GRAPHIC | g54836g87g87.jpg | GRAPHIC | 116422
50 | GRAPHIC | g54836g90g90.jpg | GRAPHIC | 61795
51 | GRAPHIC | g54836g93m00.jpg | GRAPHIC | 47797
52 | GRAPHIC | g54836g97s37.jpg | GRAPHIC | 20483
53 | GRAPHIC | g54836g98m82.jpg | GRAPHIC | 21735
| Complete submission text file | 0001193125-26-128263.txt |  | 12915533

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
2 | XBRL TAXONOMY EXTENSION SCHEMA | utl-20251231.xsd | EX-101.SCH | 15671
66 | EXTRACTED XBRL INSTANCE DOCUMENT | d54836ddef14a_htm.xml | XML | 333670

Mailing Address 6 LIBERTY LANE WEST HAMPTON NH 03842
Business Address 6 LIBERTY LANE WEST HAMPTON NH 03842 6037736504
UNITIL CORP (Filer) CIK: 0000755001 (see all company filings)

EIN.: 020381573 | State of Incorp.: NH | Fiscal Year End: 1231
Type: DEF 14A | Act: 34 | File No.: 001-08858 | Film No.: 26804380
SIC: 4931 Electric & Other Services Combined
(CF Office: 01 Energy & Transportation)