NBT Bancorp Inc
Ownership
Ownership Structure
Who owns NBT Bancorp Inc (NBTB)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.1% of the shares are freely tradable; institutional investors hold 65.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 14.24 | 7,400,090 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 6.69 | 3,475,187 | +0.0 | 03/31/2026 |
| State Street Corp | 4.79 | 2,486,293 | +2.2 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 4.63 | 2,406,173 | +3.2 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.34 | 2,253,115 | +0.0 | 03/31/2026 |
| Geode Capital Management, LLC | 2.56 | 1,329,788 | +4.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.11 | 3,174,108 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.05 | 1,585,172 | +0.7 | 07/31/2026 |
| iShares Russell 2000 ETF | 2.50 | 1,299,752 | +0.0 | 08/31/2026 |
| Vanguard Small Cap Index | 2.18 | 1,135,103 | +0.2 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Halliday Sarah A | EVP/Chief Comm Innovation Off | 22,054 | 1,135,781 $ | Jul 29, 2026 | direct |
| Mahoney Ruth H | EVP/President of Wealth Mgmt | 11,928 | 614,268 $ | Jul 29, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jul 29, 2026 | Mahoney Ruth H | EVP/President of Wealth Mgmt | Sell | 4,500 | 54.30 | 244,350 |
| Jul 29, 2026 | Halliday Sarah A | EVP/Chief Comm Innovation Off | Sell | 9,000 | 54.04 | 486,401 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.