Unitil Corporation
US ˙ NYSE ˙ US9132591077

SecurityUTL / Unitil Corporation
InstitutionState Street Corp
Latest Disclosed Ownership734,927 shares
Latest Disclosed Value $ 38,392,586
State Street Corp reports 1.89% increase in ownership of UTL / Unitil Corporation

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 734,927 shares of Unitil Corporation (US:UTL) valued at $38,392,586 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 721,277 shares of Unitil Corporation. This represents a change in shares of 1.89% during the quarter. The current value of the position is $36,841,891 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F UNITIL COM 913259107 734,927 13,650 1.89 38,393 9.89 0.0013
2026-02-13 2025-12-31 13F UNITIL COM 913259107 721,277 31,186 4.52 34,939 5.79 0.0012
2025-11-14 2025-09-30 13F UNITIL COM 913259107 690,091 -95,821 -12.19 33,028 -19.42 0.0011
2025-08-14 2025-06-30 13F UNITIL COM 913259107 785,912 34,215 4.55 40,985 -5.49 0.0015
2025-05-15 2025-03-31 13F UNITIL COM 913259107 751,697 -22,693 -2.93 43,365 3.34 0.0018
2025-02-14 2024-12-31 13F UNITIL COM 913259107 774,390 50,803 7.02 41,964 -4.27 0.0017
2024-11-14 2024-09-30 13F UNITIL COM 913259107 723,587 41,511 6.09 43,835 24.09 0.0018
2024-08-14 2024-06-30 13F UNITIL COM 913259107 682,076 7,087 1.05 35,325 -0.03 0.0015
2024-05-15 2024-03-31 13F UNITIL COM 913259107 674,989 23,074 3.54 35,336 3.10 0.0016
2024-02-14 2023-12-31 13F UNITIL COM 913259107 651,915 42,283 6.94 34,271 31.62 0.0017
2023-11-14 2023-09-30 13F UNITIL COM 913259107 609,632 -6,699 -1.09 26,037 -16.69 0.0014
2023-08-14 2023-06-30 13F UNITIL COM 913259107 616,331 19,417 3.25 31,254 -8.20 0.0016
2023-05-15 2023-03-31 13F UNITIL COM 913259107 596,914 12,778 2.19 34,048 13.49 0.0019
2023-05-15 2022-12-31 13F/A-99 UNITIL COM 913259107 584,136 -44,108 -7.02 30,001 2.81 0.0018
2023-05-15 2022-12-31 13F UNITIL COM 913259107 584,136 -44,108 30,001 0.0018
2022-11-15 2022-09-30 13F UNITIL COM 913259107 628,244 11,222 1.82 29,182 -19.46 0.0018
2022-08-15 2022-06-30 13F UNITIL COM 913259107 617,022 14,794 2.46 36,232 20.62 0.0022
2022-05-16 2022-03-31 13F UNITIL COM 913259107 602,228 25,323 4.39 30,039 13.22 0.0015
2022-02-14 2021-12-31 13F UNITIL COM 913259107 576,905 29,838 5.45 26,532 13.37 0.0013
2021-11-15 2021-09-30 13F UNITIL COM 913259107 547,067 4,894 0.90 23,404 -18.51 0.0012
2021-08-16 2021-06-30 13F UNITIL COM 913259107 542,173 219,505 68.03 28,719 94.80 0.0015
2021-07-09 2021-03-31 13F/A-1 UNITIL COM 913259107 322,668 -30,895 -8.74 14,743 -5.81 0.0008
2021-05-17 2021-03-31 13F UNITIL COM 913259107 322,668 -30,895 14,743 0.0008
2021-02-16 2020-12-31 13F UNITIL COM 913259107 353,563 -12,677 -3.46 15,652 10.60 0.0010
2020-11-10 2020-09-30 13F UNITIL COM 913259107 366,240 -13,756 -3.62 14,152 -16.90 0.0010
2020-08-14 2020-06-30 13F UNITIL COM 913259107 379,996 -7,546 -1.95 17,031 -16.00 0.0012
2020-06-19 2020-03-31 13F/A-1 UNITIL COM 913259107 387,542 -4,282 -1.09 20,276 -16.29 0.0018
2020-05-11 2020-03-31 13F UNITIL COM 913259107 387,542 -4,282 20,276 1,780.6411
2020-02-06 2019-12-31 13F UNITIL COM 913259107 391,824 19,101 5.12 24,223 2.44 0.0017
2019-11-14 2019-09-30 13F UNITIL COM 913259107 372,723 13,926 3.88 23,646 10.04 0.0018
2019-08-14 2019-06-30 13F UNITIL COM 913259107 358,797 13,261 3.84 21,488 14.80 0.0016
2019-05-15 2019-03-31 13F UNITIL COM 913259107 345,536 11,173 3.34 18,718 10.55 0.0015
2019-02-12 2018-12-31 13F UNITIL COM 913259107 334,363 -10,519 -3.05 16,932 -3.54 0.0015
2018-11-09 2018-09-30 13F UNITIL Common equity shares 913259107 344,882 12,067 3.63 17,554 3.34 0.0013
2018-08-14 2018-06-30 13F UNITIL Common equity shares 913259107 332,815 -2,105 -0.63 16,987 9.29 0.0014
2018-05-15 2018-03-31 13F UNITIL Common equity shares 913259107 334,920 -35,786 -9.65 15,543 -8.11 0.0013
2018-02-14 2017-12-31 13F UNITIL Common equity shares 913259107 370,706 15,166 4.27 16,914 -3.82 0.0014
2017-11-14 2017-09-30 13F UNITIL Common equity shares 913259107 355,540 787 0.22 17,585 2.63 0.0015
2017-08-14 2017-06-30 13F UNITIL Common equity shares 913259107 354,753 11,941 3.48 17,134 10.94 0.0015
2017-05-15 2017-03-31 13F UNITIL Common equity shares 913259107 342,812 1,346 0.39 15,445 -0.26 0.0014
2017-02-09 2016-12-31 13F UNITIL Common equity shares 913259107 341,466 54,955 19.18 15,485 38.31 0.0015
2017-01-13 2016-09-30 13F/A-1 UNITIL Common equity shares 913259107 286,511 2,857 1.01 11,196 -7.47 0.0011
2016-11-14 2016-09-30 13F UNITIL Common equity shares 913259107 286,511 11,196
2016-08-12 2016-06-30 13F UNITIL Common equity shares 913259107 283,654 -11,202 -3.80 12,100 -3.39 0.0013
2016-05-20 2016-03-31 13F/A-1 UNITIL Common equity shares 913259107 294,856 10,727 3.78 12,524 22.74 0.0014
2016-05-12 2016-03-31 13F UNITIL Common equity shares 913259107 294,856 12,524
2016-02-16 2015-12-31 13F UNITIL Common equity shares 913259107 284,129 3,364 1.20 10,204 -1.41 0.0011
2015-11-16 2015-09-30 13F UNITIL Common equity shares 913259107 280,765 -14,962 -5.06 10,350 5.97 0.0012
2015-08-13 2015-06-30 13F UNITIL Common equity shares 913259107 295,727 11,257 3.96 9,767 -1.27 0.0010
2015-05-15 2015-03-31 13F UNITIL Common equity shares 913259107 284,470 6,090 2.19 9,893 -3.06 0.0010
2015-02-11 2014-12-31 13F UNITIL Common equity shares 913259107 278,380 11,445 4.29 10,205 23.03 0.0010
2014-11-12 2014-09-30 13F/A-1 UNITIL Common equity shares 913259107 266,935 -1,533 -0.57 8,295 -8.68 0.0009
2014-11-10 2014-09-30 13F UNITIL Common equity shares 913259107 266,935 8,295
2014-08-12 2014-06-30 13F UNITIL Common equity shares 913259107 268,468 -5,100 -1.86 9,083 1.07 0.0010
2014-05-15 2014-03-31 13F/A-1 UNITIL Common equity shares 913259107 273,568 9,691 3.67 8,987 11.78 0.0010
2014-05-13 2014-03-31 13F UNITIL Common equity shares 913259107 273,768 8,994
2014-02-06 2013-12-31 13F/A-1 UNITIL Common equity shares 913259107 263,877 17,321 7.03 8,040 11.40 0.0009
2014-02-06 2013-12-31 13F UNITIL Common equity shares 913259107 261,141 6,772
2013-11-12 2013-09-30 13F UNITIL Common equity shares 913259107 246,556 -4,949 -1.97 7,217 -0.66 0.0009
2013-08-08 2013-06-30 13F UNITIL Common equity shares 913259107 251,505 251,505 7,265 0.0009
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.