Stocks making the biggest moves midday: Beyond Meat, Virgin Galactic, AMC and more

Check out the companies making headlines in midday trading.

Beyond Meat — Shares of the alternative meat company surged 10% after Bernstein double upgraded the stock to outperform from underperform. Beyond Meat's stock is down nearly 40% since January, but Bernstein said sales should gain steam again as the economic reopening widens.

Virgin Galactic Holdings – Virgin Galactic shares jumped 27.6% following the company's Saturday spaceflight test. The test, which is a step forward for the space tourism company, had previously been delayed for more than six months. At one point on Monday the stock turned positive for 2021. 

AMC Entertainment — Shares of the movie theater chain jumped 13.3% after the company's largest shareholder Dalian Wanda Group, a Chinese conglomerate, sold most of its stake in AMC. A Securities and Exchange Commission filing on Friday shows Dalian Wanda sold 30.4 million shares for about $427 million.

Dollar General — Shares of the discount retailer fell nearly 4% after Bank of America downgraded the stock to underperform from neutral. The firm said in a note that Dollar General tends to underperform when gas prices are high.

Norwegian Cruise Line — Shares of the cruise operator popped 4.7% after the company announced plans to return cruising in the U.S. this summer.

HP — The tech stock rose about 2% after Citi upgraded HP to buy from neutral. The firm said in a note to clients that demand for personal computers should remain strong post pandemic.

Moderna — Shares of Modera edged 1.7% higher after the pharmaceutical company announced a manufacturing agreement Saturday with South Korean biotech company Samsung Biologics. The move will enable Moderna to provide its Covid-19 vaccine outside of the U.S. starting in the third quarter of 2021, the company said.

— CNBC's Maggie Fitzgerald, Pippa Stevens and Jesse Pound contributed reporting.