[SCHEDULE 13G/A] Watts Water Technologies, Inc. SEC Filing

Rhea-AI Filing Summary

Watts Water Technologies, Inc. (WTS) – Schedule 13G/A (Amendment 41)

The filing updates the Horne family group’s ownership of WTS Class A common stock (CUSIP 942749102) as of 30 Jun 2025. Five related U.S. persons report beneficial ownership derived largely from convertible Class B shares held in family trusts governed by the 1997 George B. Horne Voting Trust, for which Timothy P. Horne is sole trustee.

• Timothy P. Horne: 5,926,290 shares (17.8 % of Class A); 68.2 % voting power. Sole voting power over all shares; sole dispositive power over 964,600 and shared dispositive power over 4,961,690.
• Daniel W. Horne: 1,666,970 shares (5.7 %); no voting or dispositive power apart from trust co-trusteeship.
• Deborah Horne: 1,666,970 shares (5.7 %); no voting or dispositive power.
• Peter W. Horne: 1,529,770 shares (5.3 %); 34,760 shares with sole voting/dispositive power, remainder in trust.
• Walter J. Flowers: 1,799,710 shares (6.2 %); no voting or dispositive power.

The group filed under Rule 13d-1(d) (passive owners/insiders). No certifications or Item 5 changes were required. Exhibit list references an amended stock-restriction agreement, the 1997 Voting Trust, and a joint-filing agreement.

Positive

• Stable insider ownership: The filing shows no reduction in the Horne family’s holdings, indicating continued long-term commitment.

Negative

• Concentrated voting power: Timothy P. Horne controls 68.2 % of votes with only 17.8 % economic stake, limiting minority shareholder influence.

Insights

Corporate Governance Expert

TL;DR: Filing confirms Horne family retains 68% voting control through trusts; high concentration raises governance and float considerations.

This 13G/A shows that, despite individual ownership fragmentation, Timothy P. Horne controls virtually all voting rights via the 1997 Voting Trust. His 17.8 % economic stake translates into 68.2 % voting power, effectively giving him unilateral influence over shareholder decisions. Other family members and attorney Walter J. Flowers hold >5 % economic interests but no meaningful vote outside the trust, indicating a dual-class structure where Class B shares convert 1:1 into Class A but carry superior vote. Investors should note that public float and minority influence remain limited, and any corporate actions will largely reflect the trustee’s preferences.

Securities Analyst

TL;DR: No purchase/sale activity disclosed; ownership percentages largely unchanged—impact to valuation minimal, liquidity unchanged.

The amendment is informational rather than transactional; share counts and percentages are in line with prior filings, suggesting stability in insider holdings. Because the reported shares stem from existing Class B conversions, there is no immediate dilution risk. Market impact is therefore limited, though continued tight insider control may affect takeover premium assumptions and governance discount models.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 41)

WATTS WATER TECHNOLOGIES, INC.

(Name of Issuer)

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

(Title of Class of Securities)

942749102

(CUSIP Number)

06/30/2025

(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 5,926,290.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 964,600.00
8	Shared Dispositive Power 4,961,690.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,926,290.00

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)

17.8 %

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 5,926,290 shares of Class A Common Stock of the Issuer. As noted below, 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) 950,000 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, (ii) 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, (iii) 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, (iv) 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, (v) 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, (vi) 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, (vii) 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, (viii) 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 (ix) 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 (5,926,290 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 17.8% equity percentage 68.2% 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 5,926,290 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 964,600 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.
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:	07/29/2025

Daniel W. Horne

Signature:	/s/ Timothy P. Horne*
Name/Title:	Daniel W. Horne
Date:	07/29/2025

Deborah Horne

Signature:	/s/ Timothy P. Horne*
Name/Title:	Deborah Horne
Date:	07/29/2025

Peter W. Horne

Signature:	/s/ Timothy P. Horne*
Name/Title:	Peter W. Horne
Date:	07/29/2025

Walter J. Flowers

Signature:	/s/ Walter J. Flowers
Name/Title:	Walter J. Flowers
Date:	07/29/2025

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

FAQ

How many Watts Water Technologies shares does Timothy P. Horne beneficially own?

He beneficially owns 5,926,290 shares, representing 17.8 % of the Class A common stock.

What voting power does Timothy P. Horne hold in WTS?

Through the 1997 Voting Trust he controls 68.2 % of total voting power.

Which other individuals report over 5 % ownership of WTS Class A stock?

Daniel W. Horne, Deborah Horne, Peter W. Horne, and Walter J. Flowers each report between 5.3 %–6.2 %.

Does the Schedule 13G/A disclose any new share purchases or sales?

No. The amendment only updates ownership totals; it does not report recent transactions.

Under which SEC rule was this Schedule 13G/A filed?

It was filed pursuant to Rule 13d-1(d), typically used by insiders or passive owners holding >5 %.

What exhibits accompany this filing?

They include an Amended Stock Restriction Agreement, the 1997 George B. Horne Voting Trust, and an Agreement Regarding Joint Filing.