William C. Tsonos

Companies

• BROOKLINE BANCORP INCChief executive officer Nov 4, 2022 to Jan 10, 2023¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• BBBROOKLINE BANCORP INC1,191 shares²Sep 1, 2025

As of each latest filing. The line shows shares held over time.

Recent filings

• Sep 1, 2025Returned to company 38,017 shares of BROOKLINE BANCORP INC²
• Aug 25, 2025Shares withheld for tax 1,927 shares at $11.03 of BROOKLINE BANCORP INC³
• Aug 25, 2025Shares withheld for tax 2,891 shares at $11.03 of BROOKLINE BANCORP INC³
• Aug 25, 2025Shares withheld for tax 872 shares at $11.03 of BROOKLINE BANCORP INC³
• Aug 25, 2025Shares withheld for tax 2,615 shares at $11.03 of BROOKLINE BANCORP INC³
• Aug 2, 2025Shares withheld for tax 964 shares at $10.28 of BROOKLINE BANCORP INC⁴
• Aug 2, 2025Shares withheld for tax 872 shares at $10.28 of BROOKLINE BANCORP INC⁴
• Aug 2, 2025Shares withheld for tax 127 shares at $10.28 of BROOKLINE BANCORP INC⁴
• Aug 2, 2025Shares withheld for tax 380 shares at $10.28 of BROOKLINE BANCORP INC⁴
• Aug 2, 2024Shares withheld for tax 872 shares at $9.84 of BROOKLINE BANCORP INC⁵
• Aug 2, 2024Shares withheld for tax 127 shares at $9.84 of BROOKLINE BANCORP INC⁵
• Aug 2, 2024Shares withheld for tax 68 shares at $9.84 of BROOKLINE BANCORP INC⁵
• Aug 2, 2024Shares withheld for tax 195 shares at $9.84 of BROOKLINE BANCORP INC⁵
• Aug 2, 2024Shares withheld for tax 25 shares at $9.84 of BROOKLINE BANCORP INC⁵
• Aug 2, 2024Granted 9,526 shares of BROOKLINE BANCORP INC⁵
• Aug 2, 2024Granted 9,526 shares of BROOKLINE BANCORP INC⁵
• Aug 3, 2023Shares withheld for tax 298 shares of BROOKLINE BANCORP INC⁶
• Aug 3, 2023Shares withheld for tax 20 shares of BROOKLINE BANCORP INC⁶
• Aug 3, 2023Shares withheld for tax 102 shares of BROOKLINE BANCORP INC⁶
• Aug 2, 2023Shares withheld for tax 127 shares of BROOKLINE BANCORP INC⁶
• Aug 2, 2023Shares withheld for tax 68 shares of BROOKLINE BANCORP INC⁶
• Aug 2, 2023Granted 8,617 shares of BROOKLINE BANCORP INC⁶
• Aug 2, 2023Granted 8,617 shares of BROOKLINE BANCORP INC⁶