These are the top companies that made headlines Monday morning in midday trading.

Global Payments — Shares of the company sunk 9.8% despite a better-than-expected earnings report. Refinitiv had forecasted that payments tech company PayTech would post adjusted quarterly profits of $2.07 per Share. The revenue also exceeded analyst expectations. Analyst expectations were also met by full-year revenue guidance from the company.

Vertex Pharmaceuticals — The biotech company’s shares fell 5.5% after the Food and Drug Administration placed a study of Vertex’s treatment for type 1 diabetes on hold, after determining there is insufficient information to support dose escalation with the product.

Moderna – Shares of Moderna jumped 6.8% after the company said its Covid-19 vaccine for children under 6 years old will be ready for review in June by a Food and Drug Administration panel. Moderna requested emergency authorization last week for the treatment.

Moody’s Corp — The risk assessment firm dropped 4.9% after the company cut its full-year earnings guidance. The firm now anticipates that full-year earnings will range from $10.75 to $11.25 per shares excluding certain items. Based on previous guidance, the company expected earnings to range from $12.40 to $11.25 per share. FactSet reports that analysts had estimated $11.92

Align Technology — Shares of the medical device maker jumped 5.4% after the company announced a $200 million accelerated stock repurchase program.

EPAM Systems — Shares of the software company EPAM Systems gained more than 5% after Piper Sandler upgraded them to overweight from neutral, citing its program checks.

Johnson Controls — Shares rose 1.6% after Bank of America initiated coverage of the HVAC producerWith a Buy rating. According to Bank of America, Johnson Controls International is at 42% upside due to the trend towards decarbonization and the building of smart buildings.

Activision Blizzard — Shares of Activision Blizzard rose 2.9% after Warren Buffett said Berkshire Hathaway has been upping its stake in the video game publisherIt holds 9.5% of the shares and bets on Microsoft’s proposed purchase.

Amazon — Amazon lost 3% on Monday, building on its sharp losses from last week, when it reported a big net lossFor the most recent quarter, and an issued dire financial forecast. Wedbush Securities removed the stock also from its Best Ideas List.

— CNBC’s Sarah Min, Samantha Subin and Hannah Miao contributed reporting