See’s Candies is a subsidiary of Berkshire Hathaway, and as such, it does not have a standalone ticker symbol. Instead, you can track its performance as part of Berkshire Hathaway’s stock. The ticker symbol for Berkshire Hathaway is:
BRK.A (for Class A shares)
BRK.B (for Class B shares)
So, See’s Candies is represented under BRK.A or BRK.B.