X0508 4 2025-12-12 0001769663 Pioneer Bancorp, Inc./MD PBFS 0001781038 Tomczak Jesse 652 ALBANY SHAKER ROAD ALBANY NY 12211 1 EVP and CBO 0 Common Stock 2025-12-12 4 S 0 156 14.60 D 46239 D Common Stock 2025-12-12 4 S 0 96 14.6050 D 46143 D Common Stock 2025-12-12 4 S 0 128 14.61 D 46015 D Common Stock 2025-12-12 4 S 0 339 14.62 D 45676 D Common Stock 2025-12-12 4 S 0 2 14.63 D 45674 D Common Stock 2025-12-12 4 S 0 62 14.64 D 45612 D Common Stock 2025-12-12 4 S 0 889 14.65 D 44723 D Common Stock 2025-12-12 4 S 0 277 14.66 D 44446 D Common Stock 2025-12-12 4 S 0 27 14.67 D 44419 D Common Stock 2025-12-12 4 S 0 624 14.68 D 43795 D Common Stock 2025-12-12 4 S 0 748 14.69 D 43047 D Common Stock 2025-12-12 4 S 0 401 14.70 D 42646 D Common Stock 2025-12-12 4 S 0 83 14.71 D 42563 D Common Stock 2025-12-12 4 S 0 294 14.72 D 42269 D Common Stock 2025-12-12 4 S 0 4 14.725 D 42265 D Common Stock 2025-12-12 4 S 0 128 14.73 D 42137 D Common Stock 2025-12-12 4 S 0 318 14.75 D 41819 D Common Stock 2025-12-12 4 S 0 548 14.76 D 41271 D Common Stock 2025-12-12 4 S 0 36 14.77 D 41235 D Common Stock 2025-12-12 4 S 0 200 14.78 D 41035 D Common Stock 2025-12-12 4 S 0 3 14.785 D 41032 D Common Stock 2025-12-12 4 S 0 32 14.7950 D 41000 D Common Stock 4954 I By 401(k) Stock Options 9.3900 2025-05-21 2034-05-21 Common Stock 100000 100000 D Includes shares of restricted stock which vest at a rate of 20% per year commencing on May 21, 2025. Stock option vest at a rate of 20% per year commencing on May 21, 2025. /s/ Jesse Tomczak 2025-12-15