X0303 4 2011-05-18 0000203527 VARIAN MEDICAL SYSTEMS INC VAR 0001330270 KUO JOHN W C/O VARIAN MEDICAL SYSTEMS, INC. 3100 HANSEN WAY M/S E-327 PALO ALTO CA 94304 1 VP, Gen Counsel and Secretary Common Stock 2011-05-18 4 M 0 2222 0 A 17188 D Common Stock 2011-05-18 4 F 0 815 68.71 D 16373 D Common Stock 1304.461 I By 401k Plan Restricted Stock Units 2011-05-18 4 M 0 2222 0 D Common Stock 2222 4445 D Represents shares withheld from vested restricted stock units for the payment of federal, state and payroll taxes due on vesting. Amount of securities beneficially owned at end of reporting period reflect 350 shares purchased April 29, 2011 under the Varian Medical Systems, Inc. Employee Stock Purchase Plan. Each restricted stock unit represents a contingent right to receive one share of VAR common stock. The restricted stock units vest in three equal installments on May 18, 2011, May 18, 2012, and May 18, 2013. Vested shares will be delivered to the reporting person on vest date. /s/ Franco N. Palomba, Attorney in Fact for John W. Kuo 2011-05-19