Check out this morning's top movers from around Wall Street, compiled by The Fly. 

HIGHER - 

• Portola Pharmaceuticals (PTLA) up 130% after Alexion Pharmaceuticals (ALXN) entered into a definitive merger agreement to acquire Portola for $18 per share in cash
• TG Therapeutics (TGTX) up 39% after announcing its UNITY-CLL Phase 3 trial evaluating the combination of umbralisib plus ublituximab compared to obinutuzumab plus chlorambucil in patients with previously untreated and relapsed/refractory chronic lymphocytic leukemia met its primary endpoint

UP AFTER EARNINGS - 

• Wayfair (W) up 10%
• DuPont (DD) up 2%
• Sysco (SYY) up 2%
• Marathon Petroleum (MPC) up 5%
• Henry Schein (HSIC) up 2%
• IPG Photonics (IPGP) up 6%
• US Foods (USFD) up 2%
• Sealed Air (SEE) up 3%
• Alaska Air (ALK) up 7%  

DOWN AFTER EARNINGS -

• WestRock (WRK) down 5%
• Mallinckrodt (MNK) down 3%
• Lumentum (LITE) down 1%
• Karyopharm (KPTI) down 4%

ALSO LOWER - 

• Hertz (HTZ) down 33% after the Wall Street Journal reports the company hired an extra adviser to help prepare for a bankruptcy filing
• L Brands (LB) down 6% after reporting a mutual agreement with Sycamore Partners to terminate their previously announced transaction and outlining its go-forward strategy for the company to drive long-term shareholder value