Here are some top movers of the premarket.

Nio (NIO) – The China-based electric carmaker’s shares slumped 8.4% in premarket action after it suspended production due to Covid-19 related supply chain disruptions.

Veru (VERU) – The drugmaker’s shares surged 24.8% in the premarket after it reported “overwhelming” evidence of efficacy for its experimental drug for treating hospitalized Covid-19 patients. To obtain emergency authorization, the drugmaker will be meeting with the Food and Drug Administration.

Sailpoint Technologies (SAIL) – The cybersecurity company’s shares soared 29.5% in premarket trading after it agreed to be acquired by private-equity firm Thoma Bravo for $6.9 billion or $65.25 per share.

Twitter (TWTR) – Twitter fell 1.5% in the premarket following the announcement that Elon Musk will not be joining Twitter’s board. Musk revealed a 9.2% stake last weekFollowing that, he announced his intention to join the board. Both sides did not give reasons for the reverse.

Shopify (SHOP) – The e-commerce platform company’s stock added 1.1% in the premarket after it proposed a 10-for-1 stock split, as well as the creation of a new “founder share” that would increase CEO Tobi Lutke’s voting power to 40% from the current 34%.

AT&T (T) – AT&T added 1.9% in the premarket after completing the spin-off of its WarnerMedia unit to Discovery Communications late Friday, with the stock of the newly combined Warner Brothers Discovery (WBD) set to begin trading today under its new name and ticker symbol. Deutsche Bank also named Warner Brothers Discovery as a top pick due to its strong entertainment content.

Nvidia (NVDA) – The graphics chipmaker’s stock slid 3% in premarket action, following the announcement that it would seek shareholder approval to double the number of authorized shares. Nvidia would be able to exercise stock splits or issue equity incentives, without needing another shareholder vote.

Lowe’s (LOW) – Lowe’s fell 1% in the premarket after announcing the departure of David Denton as chief financial officer. Denton will be leaving Lowe’s to join the drugmaker. Pfizer (PFE). Brandon Sink, Senior Vice President will replace him effective April 30,

JetBlue (JBLU) – The airline is cutting back its summer scheduleTo avoid disruptions to flight, JetBlue is working to improve its hiring. JetBlue gained 1% during premarket trading.