Updated Jul 16, 2026
Tsonos William C is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.

William C. Tsonos is the CEO of Bank Rhode Island and has been involved with Brookline Bancorp Inc. as indicated by SEC filings. He has made several filings but has not reported any stock transactions.
| Role | CEO Bank Rhode Island |
|---|---|
| Notability | 20/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2025-09-01 | BRKL | BROOKLINE BANCORP INC | D — Derivative transaction | 38.0K | — | |
| 2025-08-25 | BRKL | BROOKLINE BANCORP INC | F — Tax withholding / forfeiture | 1.9K | $11.03 | $21K |
| 2025-08-25 | BRKL | BROOKLINE BANCORP INC | F — Tax withholding / forfeiture | 2.9K | $11.03 | $32K |
| 2025-08-25 | BRKL | BROOKLINE BANCORP INC | F — Tax withholding / forfeiture | 872 | $11.03 | $10K |
| 2025-08-25 | BRKL | BROOKLINE BANCORP INC | F — Tax withholding / forfeiture | 2.6K | $11.03 | $29K |
| 2025-08-02 | BRKL | BROOKLINE BANCORP INC | F — Tax withholding / forfeiture | 964 | $10.28 | $10K |
| 2025-08-02 | BRKL | BROOKLINE BANCORP INC | F — Tax withholding / forfeiture | 872 | $10.28 | $9K |
| 2025-08-02 | BRKL | BROOKLINE BANCORP INC | F — Tax withholding / forfeiture | 127 | $10.28 | $1K |
| 2025-08-02 | BRKL | BROOKLINE BANCORP INC | F — Tax withholding / forfeiture | 380 | $10.28 | $4K |
William C. Tsonos is the CEO of Bank Rhode Island and has been involved with Brookline Bancorp Inc. as indicated by SEC filings. He has made several filings but has not reported any stock transactions.…
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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