Form 4 Filing for NBT Bancorp Inc.

This filing reports a transaction by Martin Randolph Sparks, EVP, General Counsel, and Secretary of NBT Bancorp Inc. On March 13, 2026, Mr. Sparks disposed of 2,400 shares of NBT Bancorp Inc. Common Stock at a price of $41.3001 per share. Following this transaction, Mr. Sparks directly owns 11,349.882 shares of the company's common stock. The filing is made on Form 4, indicating a change in beneficial ownership.