 The company's announced it's increasing the annual membership fee. The cost of the Gold Star membership will go from $60 to $65 annually, while the premium executive membership will increase from $120 to $130. It's the first fee increase for Costco members in seven years and will take effect on September 1st. The price of Costco stock rose 2% after the announcement. Over the last year and a half, Costco shares have nearly doubled in value.