X0202 4 2005-12-15 0001126328 PRINCIPAL FINANCIAL GROUP INC PFG 0001166853 GRISWELL J BARRY 711 HIGH STREET DES MOINES IA 50392 1 1 0 0 Chairman, President/CEO Common Stock 2005-12-15 4 S 0 1000 49.87 D 126492 D Common Stock 2005-12-15 4 S 0 400 49.88 D 126092 D Common Stock 2005-12-15 4 S 0 1500 49.89 D 124592 D Common Stock 2005-12-15 4 S 0 1500 49.90 D 123092 D Common Stock 2005-12-15 4 S 0 400 49.91 D 122692 D Common Stock 2005-12-15 4 S 0 200 49.92 D 122492 D Common Stock 2005-12-15 4 S 0 200 49.94 D 122292 D Common Stock 2005-12-15 4 S 0 1300 49.95 D 120992 D Common Stock 2005-12-15 4 S 0 1500 49.96 D 119492 D Common Stock 2005-12-15 4 S 0 700 49.97 D 118792 D Common Stock 2005-12-15 4 S 0 2200 49.98 D 116592 D Common Stock 2005-12-15 4 S 0 6600 49.99 D 109992 D Common Stock 2005-12-15 4 S 0 3900 50.00 D 106092 D Common Stock 2005-12-15 4 S 0 1700 50.01 D 104392 D Common Stock 2005-12-15 4 S 0 500 50.02 D 103892 D Common Stock 2005-12-16 4 M 0 54260 27.48 A 158152 D Common Stock 2005-12-16 4 S 0 19014 49.79 D 139138 D Common Stock 378 I By 401(k) Plan Common Stock 175 I By Spouse Pursuant to a 10b5-1 plan adopted September 15, 2005, and amended November 9, 2005. Includes 2,292 shares acquired pursuant to the Principal Financial Group, Inc. Employee Stock Purchase Plan. This is the second of the two Form 4s filed by the reporting person on the same date. Joyce N. Hoffman, by Power of Attorney 2005-12-19