York Water holder Zimmer reports 8.8% stake

Zimmer Partners, LP and related entities report beneficial ownership of common stock of The York Water Company.

Rhea-AI Filing Summary

Zimmer Partners, LP and related entities report beneficial ownership of common stock of The York Water Company. The reporting group, including Zimmer Financial Services Group LLC, Zimmer Partners GP, LLC and Stuart J. Zimmer, is treated collectively as the reporting persons.

The group may be deemed to beneficially own 1,419,877 shares of The York Water Company common stock, representing approximately 8.8% of the outstanding shares. This percentage is based on 16,209,339 shares outstanding as of May 5, 2026, as reported by the issuer.

The reporting persons have shared power to vote and dispose of all 1,419,877 shares and report no sole voting or dispositive power over any shares. All reporting persons share the same principal business address at 9 West 57th Street, 33rd Floor, New York, NY 10019.

Key Figures

Beneficially owned shares: 1,419,877 shares Percent of class: 8.8% Shares outstanding: 16,209,339 shares +2 more

5 metrics

Beneficially owned shares 1,419,877 shares Common stock of The York Water Company beneficially owned by the reporting persons

Percent of class 8.8% Portion of outstanding York Water common stock beneficially owned

Shares outstanding 16,209,339 shares York Water common stock outstanding as of May 5, 2026

Shared voting power 1,419,877 shares Shares over which the reporting persons share power to vote or direct the vote

Shared dispositive power 1,419,877 shares Shares over which the reporting persons share power to dispose or direct disposition

Key Terms

beneficial owners, shared voting power, shared dispositive power, percent of class, +1 more

5 terms

beneficial owners financial

"The Reporting Persons may be deemed the beneficial owners of 1,419,877 shares of Common Stock."

Beneficial owners are the people or entities that actually enjoy the economic benefits and control of shares or other assets, even when legal title is held by someone else such as a broker, custodian or trustee. Investors pay attention because beneficial owners hold the real voting power, receive dividends and can influence strategy and takeover outcomes — like the driver of a car who uses and maintains it while the bank holds the title — so disclosure shows who truly controls and benefits.

shared voting power financial

"The Reporting Persons have the shared power to vote and dispose of the 1,419,877 shares"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"Shared Dispositive Power 1,419,877.00"

percent of class financial

"Percent of class: 8.8%"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

Schedule 13G/A regulatory

"form_type": "SCHEDULE 13G/A""

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many YORW shares does Zimmer Partners report owning?

Zimmer Partners and related reporting persons may be deemed to beneficially own 1,419,877 shares of The York Water Company common stock, with shared power to vote and dispose of those shares and no sole voting or dispositive power.

What percentage of The York Water Company (YORW) does Zimmer Partners own?

Zimmer Partners and affiliated reporting persons report beneficial ownership of approximately 8.8% of The York Water Company’s outstanding common stock, based on 16,209,339 shares outstanding as of May 5, 2026.

Who are the reporting persons in this YORW Schedule 13G/A?

The reporting persons are Zimmer Partners, LP, Zimmer Financial Services Group LLC, Zimmer Partners GP, LLC, and Stuart J. Zimmer, who together may be deemed beneficial owners of the reported 1,419,877 shares of The York Water Company common stock.

Does Zimmer Partners have sole or shared voting power over YORW shares?

The reporting persons have shared voting power over 1,419,877 shares of The York Water Company common stock and no sole voting power. They also have shared, but not sole, power to dispose of those shares.

How was the 8.8% ownership of YORW calculated for Zimmer Partners?

The 8.8% ownership was calculated by dividing 1,419,877 beneficially owned shares by 16,209,339 outstanding shares of The York Water Company common stock, the amount outstanding as of May 5, 2026, as reported by the issuer.

Where is Zimmer Partners’ principal business office for this YORW holding?

The principal business office for each reporting person in this YORW Schedule 13G/A is 9 West 57th Street, 33rd Floor, New York, NY 10019, listed as the shared address for Zimmer Partners and the related entities.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/14/2026 - 09:25 AM Accepted by SEC EDGAR 08/14/2026 - 09:25 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

THE YORK WATER COMPANY

(Name of Issuer)

Common Stock, no par value per share

(Title of Class of Securities)

987184108

(CUSIP Number)

06/30/2026

(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): 987184108

1

Names of Reporting Persons

Zimmer Partners, LP

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 0.00
6	Shared Voting Power 1,419,877.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,419,877.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,419,877.00

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)

8.8 %

12

Type of Reporting Person (See Instructions)

IN, HC

SCHEDULE 13G

CUSIP Number(s): 987184108

1

Names of Reporting Persons

Zimmer Financial Services Group LLC

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 0.00
6	Shared Voting Power 1,419,877.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,419,877.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,419,877.00

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)

8.8 %

12

Type of Reporting Person (See Instructions)

OO, HC

SCHEDULE 13G

CUSIP Number(s): 987184108

1

Names of Reporting Persons

Zimmer Partners GP, LLC

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 0.00
6	Shared Voting Power 1,419,877.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,419,877.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,419,877.00

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)

8.8 %

12

Type of Reporting Person (See Instructions)

OO, HC

SCHEDULE 13G

CUSIP Number(s): 987184108

1

Names of Reporting Persons

Stuart J. Zimmer

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 0.00
6	Shared Voting Power 1,419,877.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,419,877.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,419,877.00

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)

8.8 %

12

Type of Reporting Person (See Instructions)

IN, HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: THE YORK WATER COMPANY
(b)	Address of issuer's principal executive offices: 130 E MARKET ST, York, Pennsylvania, 17401-1219
Item 2.
(a)	Name of person filing: Zimmer Partners, LP, a Delaware limited partnership (the "Investment Manager"), Zimmer Financial Services Group LLC, a Delaware limited liability company ("ZFSG"), Zimmer Partners GP, LLC, a Delaware limited liability company (the "GP"), and Stuart J. Zimmer (collectively, the "Reporting Persons"). ZFSG is the sole member of the GP. Stuart J. Zimmer, a revocable trust for his benefit, and an irrevocable trust for his immediate family are the sole members of ZFSG. The GP is the general partner of the Investment Manager. The Investment Manager is the investment manager of Zimmer Master Infrastructure Fund, L.P., ZP Master Utility Fund, Ltd. and ZP Master MidCap Fund, Ltd. and other managed accounts, (together, the "Zimmer Accounts").
(b)	Address or principal business office or, if none, residence: The address of the principal business office of each of the Reporting Persons is c/o Zimmer Partners, LP, 9 West 57th Street, 33rd Floor New York, NY 10019.
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common Stock, no par value per share
(e)	CUSIP No.: 987184108
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The Reporting Persons may be deemed the beneficial owners of 1,419,877 shares of Common Stock. The Reporting Persons may be deemed the beneficial owners of approximately 8.8% of the outstanding shares of Common Stock. This percentage was determined by dividing 1,419,877 by 16,209,339, which is the number of shares of Common Stock outstanding as of May 5, 2026, as reported in the Issuer's Form 10-Q filed on May 5, 2026, with the Securities and Exchange Commission. The Reporting Persons have the shared power to vote and dispose of the 1,419,877 shares of Common Stock beneficially owned.
(b)	Percent of class: 8.8%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 1,419,877
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 1,419,877
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.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
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.

Zimmer Partners, LP

Signature:	/s/ Jelena Napolitano
Name/Title:	Jelena Napolitano / Authorized Person
Date:	08/14/2026

Zimmer Financial Services Group LLC

Signature:	/s/ Stuart J. Zimmer
Name/Title:	Stuart J. Zimmer / Director
Date:	08/14/2026

Zimmer Partners GP, LLC

Signature:	/s/ Stuart J. Zimmer
Name/Title:	Stuart J. Zimmer / Director, Zimmer Financial Services Group LLC, its Managing Member
Date:	08/14/2026

Stuart J. Zimmer

Signature:	/s/ Stuart J. Zimmer
Name/Title:	Stuart J. Zimmer / Self
Date:	08/14/2026