Quick Takeaways
- William C. Tsonos has 1 issuer position tracked on this page.
- Estimated disclosed ownership value is not available.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of William C. Tsonos
- Location
- Boston, MA
- Signature
- William C. Tsonos, by Marissa S. Martin, POA
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow William C. Tsonos and return when a new Insider Trading filing appears.
This tracks SEC filing changes for this page using existing product update flows.
What Changed
- Largest disclosed position: BROOKLINE BANCORP INC ($0).
- Past-year value change for that position: .
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Official SEC Source
Filed on Form 4
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
See Original FilingOwnership of William C. Tsonos
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| BRKL | BROOKLINE BANCORP INC | CEO Bank Rhode Island | $0 | 01 Sep 2025 |
Insider Transactions Reported by William C. Tsonos:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.