 Arbor Trust Wealth Advisors LLC lowered its holdings in Costco Wholesale Co. NASDAQ:COST by 2.2 in the first quarter, according to its most recent Form 13F filing with the SEC. The fund owned 5,303 shares of the retailers stock after selling 122 shares during the period. Costco Wholesale comprises 1.6 of Arbor Trust Wealth Advisors ... 