Unitil Corporation
US ˙ NYSE ˙ US9132591077

SecurityUTL / Unitil Corporation
InstitutionBoston Trust Walden Corp
Latest Disclosed Ownership340,191 shares
Latest Disclosed Value $ 17,771,578
Boston Trust Walden Corp reports 11.69% decrease in ownership of UTL / Unitil Corporation

On April 24, 2026 - Boston Trust Walden Corp filed a 13F-HR form disclosing ownership of 340,191 shares of Unitil Corporation (US:UTL) valued at $17,771,578 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 385,232 shares of Unitil Corporation. This represents a change in shares of -11.69% during the quarter. The current value of the position is $16,611,527 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)
2026-04-24 2026-03-31 13F UNITIL COMMON STOCK 913259107 340,191 -45,041 -11.69 17,772 -4.76 0.0874
2026-01-28 2025-12-31 13F UNITIL COMMON STOCK 913259107 385,232 -28,409 -6.87 18,661 -5.74 0.1408
2025-10-17 2025-09-30 13F UNITIL COMMON STOCK 913259107 413,641 39,511 10.56 19,797 1.47 0.1452
2025-07-28 2025-06-30 13F UNITIL COMMON STOCK 913259107 374,130 -9,155 -2.39 19,511 -11.76 0.1392
2025-04-21 2025-03-31 13F UNITIL COMMON STOCK 913259107 383,285 -4,160 -1.07 22,112 5.32 0.1615
2025-01-24 2024-12-31 13F UNITIL COMMON STOCK 913259107 387,445 -6,159 -1.56 20,996 -11.95 0.1473
2024-10-24 2024-09-30 13F UNITIL COMMON STOCK 913259107 393,604 -9,878 -2.45 23,845 14.11 0.1659
2024-07-19 2024-06-30 13F UNITIL COMMON STOCK 913259107 403,482 4,224 1.06 20,896 -0.02 0.1550
2024-04-22 2024-03-31 13F UNITIL COMMON STOCK 913259107 399,258 -1,975 -0.49 20,901 -0.91 0.1491
2024-01-24 2023-12-31 13F UNITIL COMMON STOCK 913259107 401,233 19,855 5.21 21,093 29.49 0.1591
2023-10-18 2023-09-30 13F UNITIL COMMON STOCK 913259107 381,378 8,925 2.40 16,289 -13.76 0.1365
2023-07-24 2023-06-30 13F UNITIL COMMON STOCK 913259107 372,453 11,144 3.08 18,887 -8.36 0.1549
2023-04-19 2023-03-31 13F UNITIL COMMON STOCK 913259107 361,309 10,837 3.09 20,609 14.49 0.1779
2023-01-20 2022-12-31 13F UNITIL COMMON STOCK 913259107 350,472 -1,760 -0.50 18,000 10.01 0.1583
2022-10-19 2022-09-30 13F UNITIL COMMON STOCK 913259107 352,232 11,475 3.37 16,362 -18.23 0.1621
2022-07-22 2022-06-30 13F UNITIL COMMON STOCK 913259107 340,757 3,324 0.99 20,009 18.88 0.1891
2022-04-20 2022-03-31 13F UNITIL COMMON STOCK 913259107 337,433 11,730 3.60 16,831 12.36 0.1390
2022-01-21 2021-12-31 13F UNITIL COMMON STOCK 913259107 325,703 -4,536 -1.37 14,979 6.02 0.1203
2021-10-25 2021-09-30 13F UNITIL COMMON STOCK 913259107 330,239 5,898 1.82 14,128 -17.76 0.1251
2021-07-22 2021-06-30 13F UNITIL COMMON STOCK 913259107 324,341 -15,177 -4.47 17,180 10.75 0.1527
2021-04-21 2021-03-31 13F UNITIL COMMON STOCK 913259107 339,518 -1,815 -0.53 15,513 2.66 0.1502
2021-01-15 2020-12-31 13F UNITIL COMMON STOCK 913259107 341,333 845 0.25 15,111 14.86 0.1612
2020-10-14 2020-09-30 13F UNITIL COMMON STOCK 913259107 340,488 119,085 53.79 13,156 32.57 0.1638
2020-07-23 2020-06-30 13F UNITIL COMMON STOCK 913259107 221,403 50,614 29.64 9,924 11.07 0.1340
2020-04-24 2020-03-31 13F/A-1 UNITIL COMMON STOCK 913259107 170,789 170,789 8,935 0.1424
2020-04-21 2020-03-31 13F UNITIL COMMON STOCK 913259107 170,789 8,935
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.