X0609 4 2026-10-01 1 0001881592 NSTS Bancorp, Inc. NSTS 0002020500 Ansani Emily E. false 700 S LEWIS AVE C/O NSTS BANCORP, INC. WAUKEGAN IL 60085 1 0 Common Stock 2026-10-01 4 U 0 9200 14.31 D 0 D Stock Option 11.34 2026-10-01 4 U 0 23000 D 2034-12-19 Common Stock 23000 0 D Pursuant to the Agreement and Plan of Merger dated 05/12/2026, each outstanding share of common stock was converted into the right to receive $14.31 in cash at the effective time of the merger. This option, which provided for vesting in five equal annual installments beginning December 19, 2024, was cancelled in the merger and converted into the right to receive an amount in cash equal to the product of: (i) the total number of shares of Company common stock underlying the option, multiplied by (ii) the excess of (A) $14.31, over (B) the per share exercise price for such option. /s/ Carissa H. Schoolcraft, POA 2026-10-02