28 Stocks Moving In Monday's Mid-Day Session

Gainers

• Valeritas Holdings, Inc. VLRX shares jumped 17 percent to $3.65.
• Cambium Learning Group, Inc. ABCD shares rose 13.5 percent to $11.70.
• McDermott International, Inc. MDR gained 11.6 percent to $6.75 after the UK-based offshore oil service company Subsea 7 made an unsolicited bid to buy McDermott for $7 per share. However, the acquisition offer is contingent on McDermot terminating its pending merger with Chicago Bridge & Iron Company.
• Nautilus, Inc. NLS shares jumped 11.2 percent to $14.95. Nautilus is expected to release Q1 results on May 7, 2018. Craig-Hallum initiated coverage on Nautilus with a Buy rating and a $19.00 price target.
• GEE Group, Inc. JOB shares gained 11 percent to $2.2199.
• Check-Cap Ltd. CHEK surged 10.8 percent to $4.50.
• Foresight Autonomous Holdings Ltd FRSX rose 10.1 percent to $3.39.
• Stars Group Inc. TSG climbed 9.6 percent to $32.10. Stars Group Inc TSG announced plans to acquire Sky Betting & Gaming for $4.7 billion.
• Insmed Incorporated INSM shares jumped 9.1 percent to $25.66. Credit Suisse upgraded Insmed from Neutral to Outperform.
• Tennant Company TNC rose 8.4 percent to $75.65 after the company posted upbeat Q1 results and raised its FY18 earnings outlook.
• Command Security Corporation MOC shares gained 6.4 percent to $3.0960 after the company disclosed a $23 million five-year contract with LaGuardia Gateway Partners for LaGuardia Airport New Central Terminal Building.
• Helios and Matheson Analytics Inc. HMNY rose 6.2 percent to $2.41 after falling 10.98 percent on Friday.
• Vectren Corporation VVC shares rose 5.7 percent to $69.31. CenterPoint Energy, Inc. CNP announced plans to acquire Vectren for $72 per share in cash.
• Hanesbrands Inc. HBI gained 4.9 percent to $18.035. Stifel Nicolaus upgraded Hanesbrands from Hold to Buy.
• Michael Kors Holdings Limited KORS rose 4.5 percent to $67.91. Deutsche Bank upgraded Michael Kors from Hold to Buy.

Check out these big penny stock gainers and losers

Losers

• Prothena Corporation plc PRTA shares dipped 69 percent to $11.48 after a disappointing update relating to the company's treatment for AL amyloidosis. Prothena, a clinical-stage biopharmaceutical company that focuses on therapies in the neuroscience and orphan categories, said a Phase 2b study of its therapy called NEOD001 failed to achieve its primary or secondary endpoints. Prothena's Phase 2b study explored its NEOD001 therapy versus a placebo in previously-treated patients with AL amyloidosis and persistent cardiac dysfunction.
• Gridsum Holding Inc. GSUM fell 44.3 percent to $4.06. Gridsum reported suspension of audit report on financial statements.
• Flotek Industries, Inc. FTK shares declined 34.1 percent to $4.16 as the company issued weak revenue forecast for the first quarter.
• Akorn, Inc. AKRX dropped 32.3 percent to $13.35 after Fresenius terminated its merger deal with Akorn.
• Chicago Bridge & Iron Company N.V. CBI fell 31.2 percent to $13.44. Subsea 7 made an unsolicited bid to buy McDermott for $7 per share. However, the acquisition offer is contingent on McDermot terminating its pending merger with Chicago Bridge & Iron.
• Controladora Vuela Compañía de Aviación, S.A.B. de C.V. VLRS dropped 18 percent to $5.76. Controladora Vuela recently reported first-quarter results that showed a loss for the quarter. Imperial Capital downgraded Controladora Vuela Compania de Aviacion from Outperform to In-Line.
• Atossa Genetics Inc. ATOS fell 18.2 percent to $2.8797 after declining 19.35 percent on Friday.
• Alcoa Corporation AA fell 12.3 percent to $52.63.
• Luby's, Inc. LUB shares declined 10.3 percent to $2.448 following Q2 results.
• Aceto Corporation ACET shares tumbled 10 percent to $2.26.
• Pier 1 Imports, Inc. PIR dipped 9.7 percent to $2.385.
• Myomo, Inc. MYO fell 6.9 percent to $3.73 after rising 11.39 percent on Friday.
• SunPower Corporation SPWR fell 6.8 percent to $9.03. Bank of America downgraded SunPower from Neutral to Underperform.