Watts Water Horne group updates 13G ownership

Watts Water Technologies Inc. received an amended Schedule 13G/A from members of the Horne family and an associated trustee reporting their beneficial ownership of the company’s Class A common stock.

Accepted by SEC EDGAR 01/30/2026 - 04:08 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Watts Water Technologies Inc. received an amended Schedule 13G/A from members of the Horne family and an associated trustee reporting their beneficial ownership of the company’s Class A common stock. The filing is based largely on holdings of Class B common stock that is convertible into Class A on a one‑for‑one basis.

Timothy P. Horne is deemed the beneficial owner of 5,911,290 shares of Class A common stock, representing a 17.7% equity interest and a 68.1% voting interest. His position is primarily held through various trusts and a long‑standing voting trust structure. Daniel W. Horne and Deborah Horne each report beneficial ownership of 1,666,970 shares (5.7% equity each), while Peter W. Horne reports 1,529,770 shares (5.3% equity) and a 0.2% voting percentage. Walter J. Flowers is deemed the beneficial owner of 1,799,710 shares (6.2% equity) through trusts but disclaims beneficial ownership of these shares.

The filing explains that 5,896,290 shares of Class B common stock are subject to The Amended and Restated George B. Horne Voting Trust Agreement 1997. As trustee, Timothy P. Horne has sole power to vote all shares covered by this voting trust. The voting trust was unanimously extended effective November 26, 2024 for four additional years and is scheduled to expire on August 26, 2030, reinforcing the continuity of the current voting control arrangements.

Insights

Governance and ownership structure analyst

Horne family maintains concentrated voting control at Watts Water through an extended voting trust.

The disclosure shows a tightly held ownership structure at Watts Water Technologies, with Timothy P. Horne deemed to hold a 17.7% equity stake but a much larger 68.1% voting interest. This gap arises from extensive holdings of Class B shares, which are convertible into Class A on a one‑for‑one basis but carry significant voting influence via trust arrangements.

Under the 1997 Voting Trust, 5,896,290 Class B shares are pooled, and as current trustee, Timothy P. Horne has sole power to vote them. Other family members and related trusts (Daniel, Deborah, Peter Horne and trusts overseen by Walter Flowers) beneficially own between 5.3% and 6.2% of the equity each, but voting power is effectively centralized at the trustee level under the trust terms.

The extension of the George B. Horne Voting Trust to August 26, 2030, effective by unanimous certificate holder agreement on November 26, 2024, indicates that this concentrated voting arrangement is planned to remain in place for several more years. Future company filings that reference changes in trustees or amendments to the trust could signal shifts in how this voting control is exercised.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 42)

WATTS WATER TECHNOLOGIES INC

(Name of Issuer)

Class A Common Stock, par value $.10 per share

(Title of Class of Securities)

942749102

(CUSIP Number)

12/31/2025

(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)

SCHEDULE 13G

CUSIP No. 942749102

1

Names of Reporting Persons

Timothy P. Horne

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 5,911,290.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 949,600.00
8	Shared Dispositive Power 4,961,690.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,911,290.00

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)

17.7 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 942749102

1

Names of Reporting Persons

Daniel W. Horne

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,666,970.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,666,970.00

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)

5.7 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 942749102

1

Names of Reporting Persons

Deborah Horne

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,666,970.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,666,970.00

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)

5.7 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 942749102

1

Names of Reporting Persons

Peter W. Horne

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 34,760.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 34,760.00
8	Shared Dispositive Power 1,495,010.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,529,770.00

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)

5.3 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 942749102

1

Names of Reporting Persons

Walter J. Flowers

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,799,710.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,799,710.00

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)

6.2 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: WATTS WATER TECHNOLOGIES INC
(b)	Address of issuer's principal executive offices: 815 Chestnut Street North Andover, MA, 01845
Item 2.
(a)	Name of person filing: Timothy P. Horne Daniel W. Horne Deborah Horne Peter W. Horne Walter J. Flowers
(b)	Address or principal business office or, if none, residence: c/o Watts Water Technologies, Inc. 815 Chestnut Street North Andover, MA 01845
(c)	Citizenship: United States
(d)	Title of class of securities: Class A Common Stock, par value $.10 per share
(e)	CUSIP No.: 942749102
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: Timothy P. Horne is deemed the beneficial owner of 5,911,290 shares of Class A Common Stock of the Issuer. As noted below, substantially all of Timothy P. Horne's beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer, which is convertible into Class A Common Stock on a share for share basis. Includes (i) 15,000 shares of Class A Common Stock held by a revocable trust for the benefit of Timothy P. Horne, for which Timothy P. Horne serves as sole trustee, (ii) 920,000 shares of Class B Common Stock held by a revocable trust for the benefit of Timothy P. Horne, for which Timothy P. Horne serves as sole trustee, (iii) 1,666,970 shares of Class B Common Stock held by a revocable trust for the benefit of Daniel W. Horne, Timothy P. Horne's brother, for which Daniel W. Horne and Walter J. Flowers, a partner in the law firm of Flowers and Manning, LLP, serve as co-trustees, (iv) 1,666,970 shares of Class B Common Stock held by a revocable trust for the benefit of Deborah Horne, Timothy P. Horne's sister, for which Timothy P. Horne serves as sole trustee, which trust is revocable with the consent of the trustee, (v) 1,495,010 shares of Class B Common Stock held by a revocable trust for the benefit of Peter W. Horne, Timothy P. Horne's brother, for which Peter W. Horne serves as sole trustee, (vi) 14,600 shares of Class B Common Stock held for the benefit of Tiffany Horne Noonan, Timothy P. Horne's daughter, under an irrevocable trust for which Timothy P. Horne serves as trustee, (vii) 113,924 shares of Class B Common Stock held by a revocable trust for the benefit of Tiffany Horne Noonan, for which Walter J. Flowers serves as trustee, (viii) 6,447 shares of Class B Common Stock held by a trust for the benefit of Kiera R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, (ix) 6,447 shares of Class B Common Stock held by a trust for the benefit of Tessa R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, and (x) 5,922 shares of Class B Common Stock held by a trust for the benefit of Liv R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees. The shares of Class B Common Stock (5,896,290 shares of Class B Common Stock in the aggregate) are subject to The Amended and Restated George B. Horne Voting Trust Agreement 1997 ("1997 Voting Trust") for which Timothy P. Horne serves as trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Daniel W. Horne is deemed the beneficial owner of 1,666,970 shares of Class A Common Stock of the Issuer. As noted below, all of Daniel W. Horne's beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer which is convertible into Class A Common Stock on a share for share basis. Daniel W. Horne's beneficial ownership consists of 1,666,970 shares of Class B Common Stock held in a revocable trust for which Daniel W. Horne and Walter J. Flowers serve as co-trustees, all of which are subject to the 1997 Voting Trust for which Timothy P. Horne serves as sole trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Deborah Horne is deemed the beneficial owner of 1,666,970 shares of Class A Common Stock of the Issuer. As noted below, all of Deborah Horne's beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer, which is convertible into Class A Common Stock on a share for share basis. Deborah Horne's beneficial ownership consists of 1,666,970 shares of Class B Common Stock held in a revocable trust for which Timothy P. Horne serves as the sole trustee, all of which are subject to the 1997 Voting Trust for which Timothy P. Horne serves as sole trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Peter W. Horne is deemed the beneficial owner of 1,529,770 shares of Class A Common Stock of the Issuer. As noted below, substantially all of Peter W. Horne's beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer which is convertible into Class A Common Stock on a share for share basis Peter W. Horne's beneficial ownership consists of (i) 1,515,010 shares of Class B Common Stock held in a revocable trust for which Peter W. Horne serves as the sole trustee, and (ii) 14,760 shares of Class A Common Stock. 1,495,010 shares of Class B Common Stock described in clause (i) above are subject to the 1997 Voting Trust for which Timothy P. Horne serves as trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Walter J. Flowers is deemed the beneficial owner of 1,799,710 shares of Class A Common Stock of the Issuer. As noted below, all of Mr. Flowers' beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer which is convertible into Class A Common Stock on a share for share basis. Mr. Flowers' beneficial ownership consists of (i) 1,666,970 shares of Class B Common Stock held in a revocable trust for the benefit of Daniel W. Horne for which Daniel W. Horne and Mr. Flowers serve as co-trustees, (ii) 113,924 shares of Class B Common Stock held in a revocable trust for the benefit of Tiffany Horne Noonan for which Mr. Flowers serves as the sole trustee, (iii) 6,447 shares of Class B Common Stock held by a trust for the benefit of Kiera R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, (iv) 6,447 shares of Class B Common Stock held by a trust for the benefit of Tessa R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, and (v) 5,922 shares of Class B Common Stock held by a trust for the benefit of Liv R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees. All of the shares of Class B Common Stock (1,799,710 in the aggregate) are subject to the 1997 Voting Trust for which Timothy P. Horne serves as sole trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Mr. Flowers disclaims beneficial ownership of all such shares.
(b)	Percent of class: Timothy P. Horne 17.7% equity percentage 68.1% voting percentage Daniel W. Horne 5.7% equity percentage 0.0% voting percentage Deborah Horne 5.7% equity percentage 0.0% voting percentage Peter W. Horne 5.3% equity percentage 0.2% voting percentage Walter J. Flowers 6.2% equity percentage 0.0% voting percentage
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Timothy P. Horne 5,911,290 Daniel W. Horne 0 Deborah Horne 0 Peter W. Horne 34,760 Walter J. Flowers 0
	(ii) Shared power to vote or to direct the vote: Timothy P. Horne 0 Daniel W. Horne 0 Deborah Horne 0 Peter W. Horne 0 Walter J. Flowers 0
	(iii) Sole power to dispose or to direct the disposition of: Timothy P. Horne 949,600 Daniel W. Horne 0 Deborah Horne 0 Peter W. Horne 34,760 Walter J. Flowers 0
	(iv) Shared power to dispose or to direct the disposition of: Timothy P. Horne 4,961,690 Daniel W. Horne 1,666,970 Deborah Horne 1,666,970 Peter W. Horne 1,495,010 Walter J. Flowers 1,799,710
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.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. A group has filed this Schedule 13G pursuant to Rule 13d-1(d). The members of the group are: Timothy P. Horne Daniel W. Horne Deborah Horne Peter W. Horne Walter J. Flowers
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

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.

Timothy P. Horne

Signature:	/s/ Timothy P. Horne
Name/Title:	Timothy P. Horne
Date:	01/30/2026

Daniel W. Horne

Signature:	/s/ Timothy P. Horne*
Name/Title:	Daniel W. Horne
Date:	01/30/2026

Deborah Horne

Signature:	/s/ Timothy P. Horne*
Name/Title:	Deborah Horne
Date:	01/30/2026

Peter W. Horne

Signature:	/s/ Timothy P. Horne*
Name/Title:	Peter W. Horne
Date:	01/30/2026

Walter J. Flowers

Signature:	/s/ Walter J. Flowers
Name/Title:	Walter J. Flowers
Date:	01/30/2026

Comments accompanying signature: *By Timothy P. Horne, Attorney in Fact pursuant to Powers of Attorney filed with the Securities and Exchange Commission on February 12, 1992, which Powers of Attorney are hereby incorporated herein by reference.

Exhibit Information

INDEX OF EXHIBITS 1. Amended and Restated Stock Restriction Agreement 2. The Amended and Restated George B. Horne Voting Trust Agreement - 1997 3. Agreement Regarding Joint Filing EXHIBIT 1 All Class B Common Stock shares beneficially owned by Timothy P. Horne are held individually by or in trusts for the benefit of Timothy P. Horne, Daniel W. Horne, Deborah Horne, Tiffany Horne Noonan, Kiera R. Noonan, Tessa R. Noonan, Liv R. Noonan and Peter W. Horne, and any voting trust certificates representing such shares, are subject to an Amended and Restated Stock Restriction Agreement (the "Agreement"). Upon any proposed voluntary transfer or transfer by operation of law of Class B Common Stock or voting trust certificates representing such shares by any of the above stockholders, or upon the death of such a stockholder holding such shares or voting trust certificates, the other parties to the Agreement have a pro rata right of first refusal to purchase such shares (including a second opportunity to elect to purchase any shares not purchased under the first right of refusal). The purchase price per share is the 15-day average trading price of the Issuer's Class A Common Stock while publicly traded, except in the case of certain involuntary transfers, in which case the purchase price is book value. This summary is qualified in its entirety by reference to the text of the Agreement which is incorporated herein by reference to Exhibit 2 to the Issuer's Current Report on Form 8-K dated October 31, 1991, and to the text of Amendment No. 1 to the Agreement which is incorporated herein by reference to Exhibit 10.21 to the Issuer's Annual Report on Form 10-K dated September 16, 1997. EXHIBIT 2 The 920,000 shares of Class B Common Stock held by a revocable trust for the benefit of Timothy P. Horne, 1,666,970 shares of Class B Common Stock held by a trust for the benefit of Daniel W. Horne, 1,666,970 shares of Class B Common Stock held by a trust for the benefit of Deborah Horne, 1,495,010 shares of Class B Common Stock held by a trust for the benefit of Peter W. Horne, 14,600 shares of Class B Common Stock held for the benefit of Tiffany Horne Noonan under an irrevocable trust for which Timothy P. Horne serves as trustee, 113,924 shares of Class B Common Stock held by a trust for the benefit of Tiffany Horne Noonan for which Walter J. Flowers serves as the sole trustee, 6,447 shares of Class B Common Stock held by a trust for the benefit of Kiera R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, 6,447 shares of Class B Common Stock held by a trust for the benefit of Tessa R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, and 5,922 shares of Class B Common Stock held by a trust for the benefit of Liv R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees (5,896,290 shares of Class B Common Stock in the aggregate) are subject to the terms of The George B. Horne Voting Trust Agreement1997 (the "1997 Voting Trust"). Under the terms of the 1997 Voting Trust, the trustee (currently Timothy P. Horne) has sole power to vote all shares subject to the 1997 Voting Trust. Under the terms of the 1997 Voting Trust, in the event Timothy P. Horne ceases to serve as trustee of the 1997 Voting Trust, then Joseph T. Noonan and Walter J. Flowers (each, a "Successor Trustee" and collectively, the "Successor Trustees"), shall thereupon become cotrustees of the 1997 Voting Trust if such individuals are willing and able to succeed. At any time, Timothy P. Horne, if then living and not subject to incapacity, may designate up to two additional persons, one to be designated as the primary designee (the "Primary Designee") and the other as the secondary designee ("Secondary Designee"), to serve in the stead of any Successor Trustee who shall be unable or unwilling to serve as a trustee of the 1997 Voting Trust. Such designations are revocable by Timothy P. Horne at any time prior to the time at which such designees become a trustee. If any of the Successor Trustees is unable or unwilling or shall otherwise fail to serve as a trustee of the 1997 Voting Trust, or after becoming a co-trustee shall cease to serve as such for any reason, then a third person shall become a co-trustee with the remaining two trustees, in accordance with the following line of succession: first, any individual designated as the Primary Designee, next, any individual designated as the Secondary Designee, and then, an individual appointed by the holders of a majority in interest of the voting trust certificates then outstanding. In the event that the Successor Trustees shall not concur on matters not specifically contemplated by the terms of the 1997 Voting Trust, the vote of a majority of the Successor Trustees shall be determinative. No trustee or Successor Trustee shall possess the Determination Power unless it is specifically conferred upon such trustee pursuant to the provisions of the 1997 Voting Trust. The 1997 Voting Trust was extended effective as of November 26, 2024 by unanimous agreement of the holders of all of the outstanding trust certificates issued under the 1997 Voting Trust agreement for an additional period of four years and will expire on August 26, 2030. The 1997 Voting Trust may be amended by vote of the holders of a majority of the voting trust certificates then outstanding and by the number of trustees authorized to take action at the relevant time. Shares may not be removed from the 1997 Voting Trust during its term without the consent of the trustees. This summary is qualified in its entirety by reference to the 1997 Voting Trust which is incorporated herein by reference to Exhibit 9.2 of the Issuer's Annual Report on Form 10-K dated September 28, 1999 filed with the Securities and Exchange Commission. EXHIBIT 3 AGREEMENT REGARDING JOINT FILING Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the undersigned hereby agree to file jointly on behalf of each of them the statement on Schedule 13G to which this Agreement is attached, and any amendments thereto, pursuant to Regulation 13D-G under the Exchange Act. It is understood and agreed that each of the parties hereto is responsible for the timely filing of the statement on Schedule 13G to which this Agreement is attached, and any amendments thereto, and for the completeness and accuracy of the information concerning such party contained therein; provided that such party is not responsible for the completeness or accuracy of information concerning any other party unless such party knows or has reason to believe that such information is inaccurate.