(November 14, 2018, 12:50 PM EST) -- SAN FRANCISCO — A shareholder sued a medical device maker and certain of its senior executives in California federal court on Nov. 5, alleging that the defendants violated federal securities law by failing to disclose to investors that it would offer higher discounts to promote its Invisalign device for the treatment of malocclusion or the misalignment of teeth (Xiaojiao Lu v. Align Technology, et al., No. 18-6720, N.D. Calif.)....