Hidden Cove Wealth Management LLC’s holdings in Costco Wholesale were worth $505,000 at the end of the most recent reporting period. Insider Transactions at Costco WholesaleIn other Costco Wholesale news, EVP Yoram Rubanenko sold 4,000 shares of Costco Wholesale stock in a transaction dated Monday, July 14th. Costco Wholesale Stock PerformanceShares of COST stock opened at $943.26 on Tuesday. Visit HoldingsChannel.com to get the latest 13F filings and insider trades for Costco Wholesale Corporation (NASDAQ:COST – Free Report). Receive News & Ratings for Costco Wholesale Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Costco Wholesale and related companies with MarketBeat.com's FREE daily email newsletter.