X0306 4 2018-09-04 0000203527 VARIAN MEDICAL SYSTEMS INC VAR 0001695593 MOMSEN MAGNUS C/O VARIAN MEDICAL SYSTEMS, INC. 3100 HANSEN WAY, MS E327 PALO ALTO CA 94304 1 SVP, CAO, Corporate Controller Common Stock 2018-09-04 4 M 0 2800 60.91 A 3424 D Common Stock 2018-09-04 4 S 0 2800 111.6772 D 624 D Non Qualified Stock Option (Right to Buy) 60.91 2018-09-04 4 M 0 2800 0 D 2015-11-09 2019-11-09 Common Stock 2800 1257 D This transaction is pursuant to the filer's SEC Rule10b5-1 Stock Plan Amount of securities beneficially owned at end of reporting period reflect 178 shares purchased on April 29, 2018 under the Varian Medical Systems, Inc. Employee Stock Purchase Plan and 6,142 shares transferred pursuant to divorce settlement agreement. The 2,800 shares were sold in multiple transactions executed on the same day at prices ranging from $111.33 to $112.30. The detailed breakdown of executed sales will be furnished upon request. Stock option granted under the Varian Medical Systems, Inc. Third Amended and Restated 2005 Omnibus Stock Plan, which complies with Rule 16b-3. The option vests as follows: one third on 11/09/2013, and the remaining shares in 24 equal installments over the 24 months following the first vesting date. /s/ Siang Chin, attorney-in-fact for Magnus Momsen 2018-09-05