X0202 4 2007-05-18 0 0000886346 KADANT INC KAI 0001251665 OBRIEN THOMAS M ONE TECHNOLOGY PARK DRIVE WESTFORD MA 01886 0 1 0 0 CFO, EXECUTIVE VICE PRESIDENT Common Stock 2007-05-18 4 M 0 300 14.5 A 15395 D Common Stock 2007-05-18 4 S 0 300 28.05 D 15095 D Common Stock 2007-05-18 4 M 0 600 14.5 A 15695 D Common Stock 2007-05-18 4 S 0 600 28.04 D 15095 D Common Stock 2007-05-18 4 M 0 800 14.5 A 15895 D Common Stock 2007-05-18 4 S 0 800 28.03 D 15095 D Common Stock 2007-05-18 4 M 0 1100 14.5 A 16195 D Common Stock 2007-05-18 4 S 0 1100 28.02 D 15095 D Common Stock 2007-05-18 4 M 0 1500 14.5 A 16595 D Common Stock 2007-05-18 4 S 0 1500 28.01 D 15095 D Common Stock 2007-05-18 4 M 0 1000 14.5 A 16095 D Common Stock 2007-05-18 4 S 0 1000 28. D 15095 D Common Stock 2007-05-18 4 M 0 10000 14.5 A 25095 D Common Stock 2007-05-18 4 S 0 10000 28 D 15095 D Common Stock 2007-05-18 4 M 0 8000 14.5 A 23095 D Common Stock 2007-05-18 4 S 0 8000 28 D 15095 D Common Stock 2007-05-18 4 M 0 200 13.05 A 15295 D Common Stock 2007-05-18 4 S 0 200 28 D 15095 D Common Stock 2007-05-18 4 M 0 2000 14.50 A 17095 D Employee Stock Option (Right To Buy) 14.5 2007-05-18 4 M 0 25300 0 D 2002-01-02 2009-01-02 Common Stock 25300 10000 D Employee Stock Option (Right To Buy) 13.05 2007-05-18 4 M 0 200 0 D 2001-12-10 2008-12-10 Common Stock 200 29800 D THE TRANSACTIONS REPORTED ON THIS FORM 4 WERE EXECUTED PURSUANT TO A RULE 10b-5-1 TRADING PLAN. by Sandra L. Lambert for Thomas M. O'Brien 2007-05-22