BlackRock (UTL) discloses 14.9% ownership of Unitil; iShares >5%

Rhea-AI Filing Summary

BlackRock, Inc. reports beneficial ownership of 2,686,435 shares of UNITIL CORPORATION common stock, representing 14.9% of the class. The filing shows BlackRock holds 2,658,845 shares with sole voting power and 2,686,435 shares with sole dispositive power. The iShares Core S&P Small-Cap ETF is identified as a holder with an interest exceeding 5%.

Insights

Institutional Ownership Analyst

BlackRock reports a large passive stake in UNITIL at 14.9%.

BlackRock's Schedule 13G/A lists 2,686,435 shares beneficially owned and shows sole voting and dispositive powers nearly aligned (voting 2,658,845; dispositive 2,686,435), indicating centralized control within the Reporting Business Units. The filing attributes an interest by iShares Core S&P Small-Cap ETF above the 5% threshold.

Timing and trading intent are not stated; Schedule 13G/A filings typically reflect passive investment positions. Subsequent filings could show changes in percent ownership or a move to an active filer if voting or strategic intent changes.

Corporate Governance Specialist

High passive ownership can influence governance dialogue without implying control.

At 14.9% beneficial ownership, BlackRock is a sizable shareholder but not a majority holder. The close match between sole voting and dispositive power suggests voting authority rests with BlackRock's Reporting Business Units disclosed here.

Watch for proxy-season disclosures or any Schedule 13D amendments that would signal active engagement; this excerpt does not state such intentions.

Key Figures

Beneficially owned shares: 2,686,435 shares Percent of class: 14.9% Sole voting power: 2,658,845 shares +3 more

6 metrics

Beneficially owned shares 2,686,435 shares Amount beneficially owned reported on Schedule 13G/A

Percent of class 14.9% Percent of common stock beneficially owned

Sole voting power 2,658,845 shares Number with sole power to vote or to direct the vote

Sole dispositive power 2,686,435 shares Number with sole power to dispose or to direct disposition

CUSIP 913259107 Unitil Corporation common stock CUSIP on cover

Identified >5% holder iShares Core S&P Small-Cap ETF Item 6 identifies this entity as holding an interest >5%

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power, Reporting Business Units

4 terms

Schedule 13G/A regulatory

"This Schedule 13G/A reflects the securities beneficially owned"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: 2686435"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 2686435"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Reporting Business Units financial

"beneficially owned by certain business units (collectively, the "Reporting Business Units")"

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 18)

UNITIL CORPORATION

(Name of Issuer)

Common Stock

(Title of Class of Securities)

913259107

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 913259107

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 2,658,845.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,686,435.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,686,435.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

14.9 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: UNITIL CORPORATION
(b)	Address of issuer's principal executive offices: 6 LIBERTY LANE WEST HAMPTON NH 03842
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 913259107
Item 4.	Ownership
(a)	Amount beneficially owned: 2686435
(b)	Percent of class: 14.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 2658845
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2686435
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The interest of 1 such person, iShares Core S&P Small-Cap ETF, in the common stock of UNITIL CORPORATION is more than five percent of the total outstanding common stock.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	04/24/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

How many UNITIL (UTL) shares does BlackRock report owning?

BlackRock reports beneficial ownership of 2,686,435 shares of UNITIL (UTL). The filing states this represents 14.9% of the outstanding common stock and lists voting and dispositive power figures.

Does BlackRock have voting power over UNITIL (UTL) shares?

Yes. BlackRock reports sole voting power for 2,658,845 shares of UNITIL (UTL). The Schedule 13G/A shows the voting figure alongside dispositive power for clarity on control.

Is any other entity shown as owning more than 5% of UNITIL (UTL)?

Yes. The filing identifies iShares Core S&P Small-Cap ETF as having an interest exceeding 5% in UNITIL (UTL). The statement appears under Item 6 concerning ownership on behalf of another person.

What does Schedule 13G/A tell investors about BlackRock's intent for UNITIL (UTL)?

A Schedule 13G/A typically indicates a passive investment stance. This filing lists ownership and power figures but does not state active control or strategic intent regarding UNITIL (UTL).

When was the Schedule 13G/A for BlackRock and UNITIL (UTL) signed?

The filing is signed by Spencer Fleming on 04/24/2026. The cover page shows an earlier date stamp of 03/31/2026 tied to the reporting period or cover metadata.