The assault happened at a Vons in the 5000 block of Mission Oaks Boulevard on March, 31, 2014 as a female victim was grocery shopping, police said.
Police have surveillance images of the suspect who is described as a white male about 55 to 65 years old, with gray hair and a bushy gray mustache.
The suspect allegedly walked by the woman, groped one of her breasts, walked away and quickly came back. He then acted like he was reaching for groceries and groped one of her breasts again, according to Ventura Country Sheriff's Sgt. John Franchi.
Police say there may be other victims.
If you have information on the suspect, you are asked to call Crime Stoppers at (800)-222-TIPS or (800) 222-8477.