Stocks making the biggest moves midday: Twitter, Macy’s, Nvidia, Lululemon and more

A Lululemon sign hangs in front of their store at the Woodbury Commons Premium Outlets shopping mall on November 17, 2019 in Central Valley, New York.

The companies are making news in midday trading.

The department store chain reported better-than-expected quarterly results and raised its profit guidance. Macy's got a boost from shoppers who are buying apparel and other goods regardless of rising prices.

Musk increased his commitment in his takeover bid to $33.5 billion. Analysts said the move indicates a new seriousness by the CEO and that he will complete the deal, which has been mired in controversy since Musk proposed it in May.

Morgan Stanley upgraded the company to overweight and said it was well positioned to perform well even as a recession looms.

After falling earlier in the session, the chipmaker's stock gained 5.6%. It came as Nvidia issued weaker-than- expected guidance for the current quarter and said it plans to slow hiring.

The stock of the company gained 4.2% after it was announced that it would buy the company. It would be one of the largest technology deals in history.

Dollar Tree's revenue and earnings beat analyst expectations. Dollar Tree had earnings per share of $2.37 and revenues of $ 6.9 billion. Analysts expected earnings of $2.00 a share on revenue of $6.76 billion.

The stock of the food and beverage company fell after it was warned of rising inflation and competition from private labels.

The release of better-than- expected results for the previous quarter led to a surge in the shares ofAlibaba. Excluding items, the Chinese e-commerce giant reported fourth-quarter earnings of $7.35 per share, on revenues of 204.05 billion. StreetAccount had predicted earnings of CNY7.31 a share on revenue of $199.25 billion.

Dollar General's shares surged more than 14 percent on the back of better-than-forecast quarterly figures. Dollar General had first-quarter earnings of $2.41 per share. The Refinitiv consensus had a profit of $2.31 per share on revenue of $8.7 billion.

Revenue and earnings for the previous quarter were better than expected. Williams-Sonoma said it would maintain its guidance for the year.

The cloud company fell after issuing weak guidance. Hardware partners have been hit by supply chain issues, according to Nutanix.

The medical device maker's shares fell after the report. The company reported adjusted earnings per share of $1.52 on $8.09 billion of revenue. Analysts were expecting a profit of $1.56 per share and revenue of $8.47 billion. The results for the quarter were weighed down by supply chain issues.

CNBC's Tanaya Macheel, Hannah Miao, Sarah Min and Jesse Pound contributed reporting.