WTS · Watts Water Technologies Inc · Insider Trading

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $359.50 to $359.87, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1).

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $352.22 to $352.85, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes (1), (3) and (4) to this Form 4.

The shares are held in a trust for the benefit of Tiffany Horne Noonan, the Reporting Person's spouse, who also serves as co-trustee of this trust.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $353.30 to $354.00, inclusive.

The shares are held in a trust for the benefit of Tiffany Horne Noonan, the Reporting Person's spouse, who also serves as co-trustee of this trust.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $354.50 to $354.84, inclusive.

The shares are held in a trust for the benefit of Tiffany Horne Noonan, the Reporting Person's spouse, who also serves as co-trustee of this trust.

Shares of Class B Common Stock are convertible into shares of Class A Common Stock on a 1-for-1 basis.

All shares of Class B Common Stock were convertible into Class A Common Stock upon issuance and do not have an expiration date.

Consists of the following shares of Class B Common Stock which are subject to The Amended and Restated George B. Horne Voting Trust Agreement - 1997 for which the Reporting Person serves as trustee: (i) 1,666,970 shares held in a trust for the benefit of Daniel W. Horne, (ii) 1,666,970 shares held in a trust for the benefit of Deborah Horne, (iii) 1,495,010 shares held in a trust for the benefit of Peter W. Horne, (iv) 10,950 shares held in a trust for the benefit of Tiffany Horne Noonan, (v) 113,924 shares held in a trust for the benefit of Tiffany Horne Noonan, (vi) 6,447 shares held in a trust for the benefit of Kiera R. Noonan, (vii) 6,447 shares held in a trust for the benefit of Tessa R. Noonan, and (viii) 5,922 shares held in a trust for the benefit of Liv R. Noonan.

Shares of Class B Common Stock are convertible into shares of Class A Common Stock on a 1-for-1 basis.

All shares of Class B Common Stock were convertible into Class A Common Stock upon issuance and do not have an expiration date.

The shares are held in a trust for the benefit of Tiffany Horne Noonan, the Reporting Person's spouse, who also serves as co-trustee of this trust.

Shares of Class B Common Stock are convertible into shares of Class A Common Stock on a 1-for-1 basis.

The shares are held in a trust for the benefit of Tiffany Horne Noonan, the Reporting Person's spouse, who also serves as co-trustee of this trust.

Shares of Class B Common Stock are convertible into shares of Class A Common Stock on a 1-for-1 basis.

All shares of Class B Common Stock were convertible into Class A Common Stock upon issuance and do not have an expiration date.

The shares are held in a trust for the benefit of Tiffany Horne Noonan, the Reporting Person's spouse, who also serves as co-trustee of this trust.

Represents the annual grant of a stock award to the Reporting Person as a non-employee director of the Issuer at the Issuer's first quarterly board meeting following the Annual Meeting of Stockholders. The number of shares awarded is determined by dividing $160,000 by the closing stock price on the grant date.

Represents the annual grant of a stock award to the Reporting Person as a non-employee director of the Issuer at the Issuer's first quarterly board meeting following the Annual Meeting of Stockholders. The number of shares awarded is determined by dividing $160,000 by the closing stock price on the grant date.

Represents the annual grant of a stock award to the Reporting Person as a non-employee director of the Issuer at the Issuer's first quarterly board meeting following the Annual Meeting of Stockholders. The number of shares awarded is determined by dividing $160,000 by the closing stock price on the grant date.

Represents the annual grant of a stock award to the Reporting Person as a non-employee director of the Issuer at the Issuer's first quarterly board meeting following the Annual Meeting of Stockholders. The number of shares awarded is determined by dividing $160,000 by the closing stock price on the grant date.

Represents the annual grant of a stock award to the Reporting Person as a non-employee director of the Issuer at the Issuer's first quarterly board meeting following the Annual Meeting of Stockholders. The number of shares awarded is determined by dividing $160,000 by the closing stock price on the grant date.

Represents the annual grant of a stock award to the Reporting Person as a non-employee director of the Issuer at the Issuer's first quarterly board meeting following the Annual Meeting of Stockholders. The number of shares awarded is determined by dividing $160,000 by the closing stock price on the grant date.

Represents the annual grant of a stock award to the Reporting Person as a non-employee director of the Issuer at the Issuer's first quarterly board meeting following the Annual Meeting of Stockholders. The number of shares awarded is determined by dividing $160,000 by the closing stock price on the grant date.

Represents the annual grant of a stock award to the Reporting Person as a non-employee director of the Issuer at the Issuer's first quarterly board meeting following the Annual Meeting of Stockholders. The number of shares awarded is determined by dividing $160,000 by the closing stock price on the grant date.

This sale of Class A Common Stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 10, 2025.

This sale of Class A Common Stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 10, 2025.

This sale of Class A Common Stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 10, 2025.

Represents the number of shares required to be withheld to cover tax withholding obligations in connection with the vesting of restricted stock units (RSUs) purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan (MSPP) on March 15, 2023. The Reporting Person previously reported the total number of shares subject to vesting of the RSUs in Table I of a Form 4 filed in connection with the original purchase of the RSUs. The withholding of shares to cover tax withholding obligations is mandated by the terms of the Issuer's MSPP and does not represent a discretionary transaction by the Reporting Person.

Represents the number of shares required to be withheld to cover tax withholding obligations in connection with the vesting of restricted stock units (RSUs) purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan (MSPP) on March 15, 2023. The Reporting Person previously reported the total number of shares subject to vesting of the RSUs in Table I of a Form 4 filed in connection with the original purchase of the RSUs. The withholding of shares to cover tax withholding obligations is mandated by the terms of the Issuer's MSPP and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2024. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2024. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2025. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2025. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2025. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents the number of shares required to be withheld to cover tax withholding obligations in connection with the vesting of restricted stock units (RSUs) purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan (MSPP) on March 15, 2023. The Reporting Person previously reported the total number of shares subject to vesting of the RSUs in Table I of a Form 4 filed in connection with the original purchase of the RSUs. The withholding of shares to cover tax withholding obligations is mandated by the terms of the Issuer's MSPP and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2025. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2024. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2024. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2025. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2024. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2024. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents the number of shares required to be withheld to cover tax withholding obligations in connection with the vesting of restricted stock units (RSUs) purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan (MSPP) on March 15, 2023. The Reporting Person previously reported the total number of shares subject to vesting of the RSUs in Table I of a Form 4 filed in connection with the original purchase of the RSUs. The withholding of shares to cover tax withholding obligations is mandated by the terms of the Issuer's MSPP and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2025. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2024. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents the number of shares required to be withheld to cover tax withholding obligations in connection with the vesting of restricted stock units (RSUs) purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan (MSPP) on March 15, 2023. The Reporting Person previously reported the total number of shares subject to vesting of the RSUs in Table I of a Form 4 filed in connection with the original purchase of the RSUs. The withholding of shares to cover tax withholding obligations is mandated by the terms of the Issuer's MSPP and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 14, 2025. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 13, 2023. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares subject to restricted stock units purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan at a discount of 20% from the closing sale price of the Issuer's Class A Common Stock on March 13, 2026. The restricted stock units were purchased using a portion of the Reporting Person's pre-tax 2025 performance bonus. The restricted stock units vest in three equal annual installments beginning one year after the date of grant.

Represents shares subject to restricted stock units purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan at a discount of 20% from the closing sale price of the Issuer's Class A Common Stock on March 13, 2026. The restricted stock units were purchased using a portion of the Reporting Person's pre-tax 2025 performance bonus. The restricted stock units vest in three equal annual installments beginning one year after the date of grant.

Represents shares subject to restricted stock units purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan at a discount of 20% from the closing sale price of the Issuer's Class A Common Stock on March 13, 2026. The restricted stock units were purchased using a portion of the Reporting Person's pre-tax 2025 performance bonus. The restricted stock units vest in three equal annual installments beginning one year after the date of grant.

Consists of shares of deferred stock that vest in three equal annual installments beginning on the first anniversary of the date of grant.

Consists of shares of deferred stock that vest in three equal annual installments beginning on the first anniversary of the date of grant.

This amendment to Form 4 corrects a mistake in the number of shares previously reported on the Reporting Person's Form 4 filed on March 17, 2026. The Reporting Person acquired 642 shares pursuant to the Management Stock Purchase Plan. The original Form 4 filing incorrectly reported the number of shares acquired as 481.

Represents shares subject to restricted stock units purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan at a discount of 20% from the closing sale price of the Issuer's Class A Common Stock on March 13, 2026. The restricted stock units were purchased using a portion of the Reporting Person's pre-tax 2025 performance bonus. The restricted stock units vest in three equal annual installments beginning one year after the date of grant.

Consists of shares of deferred stock that vest in three equal annual installments beginning on the first anniversary of the date of grant.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 13, 2023. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.

Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 13, 2023. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person.