Stocks making the biggest moves midday: Twitter, Johnson & Johnson, WeWork and more

cnbc.com:

Check out the companies making headlines in midday trading Tuesday.

Johnson & Johnson — Shares of the pharmaceutical and consumer giant gained 3% after the company beat earnings expectations in its first-quarter report. Still, J&J lowered its full-year sales and earnings outlook and stopped providing Covid-19 vaccine revenue guidance due to a global supply surplus and demand uncertainty.

Twitter — Shares of the social media giant dipped 1% on news that Apollo Global Management is reportedly considering financing a potential takeover of Twitter. To be sure, the firm is not interested in joining a private equity consortium in a buyout bid. Apollo's stock rose 2.8% following the report.

Airline stocks — Airline stocks jumped after the Transportation Security Administration said it is no longer enforcing mask mandates on planes. The news comes after a federal judge in Florida ruled that the CDC had overstepped its authority with the mandate. Shares of Delta, United Airlines and American Airlines rose 3.1%, 4% and 5.7%, respectively.

Blackstone — Blackstone's stock rose 4.6% on news that it would buy student housing company American Campus Communities in a deal worth nearly $13 billion. Shares of American Campus surged 12.7% on the news.

Halliburton — Shares of the oilfield services giant dipped 1% even after Halliburton beat estimates for the latest quarter and raised its outlook for customer spending in North America for the year.

Citizens Financial —  The bank posted better-than-expected quarterly results, sending its stock up more than 7%. Citizens reported a profit of 93 cents per share on revenue of $1.65 billion. Analysts expected earnings of 92 cents per share on revenue of $1.64 billion, according to Refinitiv. The