X0609 4 2026-03-18 0002059653 Lake Shore Bancorp, Inc. /MD/ LSBK 0001616460 Werdein Jeffrey M. C/O 31 EAST FOURTH STREET DUNKIRK NY 14048 false true false false EVP-Commercial Division false Common Stock 2026-03-18 4 A false 3025 0.00 A 54557 D Common Stock 20000 I By IRA Common Stock 6510 I By ESOP Common Stock 2000 I By Spouse Common Stock 1056 I By Son Stock Option (Right to Buy) 10.62 2026-10-21 Common Stock 23132 23132 D Shares of restricted stock vest on March 18, 2027. Includes 3,025 shares of unvested restricted stock that were granted on March 18, 2026 and vest in four equal annual installments beginning on the first anniversary of the grant. Includes 3,063 remaining shares of unvested restricted stock that were granted on March 12, 2025 and were scheduled to vest in four equal annual installments beginning on the first anniversary of the grant. Includes 2,575 remaining shares of unvested restricted stock that were granted on April 23, 2024 and were scheduled to vest in four equal annual installments beginning on the first anniversary of the grant. These shares were acquired pursuant to an Employee Stock Ownership Plan Allocation. Options are fully vested. /s/ Taylor M. Gilden, pursuant to power of attorney 2026-03-20