77 Stocks Moving In Tuesday''s Mid-Day Session Gainers Biohaven Pharmaceutical Holding Company Ltd. (NASDAQ: BHVN ) shares jumped 70.8% to $142.01. Pfizer Inc (NYSE: PFE ) will acquire Biohaven Pharmaceutical Holding for $148.50 per share, equivalent to $11.6 billion. Vroom, Inc. (NASDAQ: VRM ) shares gained 38.4% to $1.4950 after the company reported better-than-expected Q1 results. Appian Corporation (NASDAQ: APPN ) gained 34.5% to $57.86. Appian was awarded $2.036 billion in damages against Pegasystems Inc.. AdaptHealth Corp. (NASDAQ: AHCO ) shares climbed 25.9% to $14.39 after the company reported upbeat Q1 sales and announced a $200 million buyback. CECO Environmental Corp. (NASDAQ: CECE ) gained 24.7% to $5.30 after the company posted upbeat Q1 results and announced the purchase of Compass Water Solutions. Assertio Holdings, Inc. (NASDAQ: ASRT ) rose 23.1% to $2.3150 after the company reported better-than-expected Q1 EPS and sales results. Aurinia Pharmaceuticals Inc. (NASDAQ: AUPH ) gained 22.2% to $10.93 following strong quarterly sales.