X0202 4 2006-01-18 0001005284 UNIVERSAL DISPLAY CORP \PA\ PANL 0001101463 LACERTE LAWRENCE 375 PHILLIPS BLVD. EWING NJ 08618 1 0 0 0 Common Stock 2006-01-18 4 S 0 2400 12.07 D 905100 D Common Stock 2006-01-18 4 S 0 2800 12.08 D 902300 D Common Stock 2006-01-18 4 S 0 200 12.09 D 902100 D Common Stock 2006-01-19 4 S 0 2500 12.19 D 899600 D Common Stock 2006-01-19 4 S 0 2500 12.22 D 897100 D Common Stock 2006-01-19 4 S 0 3500 12.45 D 893600 D Common Stock 2006-01-19 4 S 0 1000 12.50 D 892600 D Common Stock 2006-01-19 4 S 0 1500 12.52 D 891100 D Common Stock 2006-01-20 4 S 0 2000 12.50 D 889100 D /s/ Sidney D. Rosenblatt (by power of attorney) 2006-01-20