Third Point, the activist fund run by Dan Loeb, disclosed a stake in Campbell Soup Co. and said a sale of the company would be the best outcome in its current strategic review after years of “abysmal oversight.” The New York-based hedge fund said in a regulatory filing it had partnered with fellow Campbell investor George Strawbridge to push for a sale of the soup maker. They collectively hold about 8.4 percent of the company, according to the filing. Loeb said in the filing that Third Point has had conversations with the company’s interim chief executive officer, Keith McLoughlin.