Stocks making the biggest moves midday: Carnival, Nasdaq, Oracle, KeyCorp and more

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Check out the companies making the biggest moves midday:

Carnival — The stock rallied 13% after it was upgraded by JPMorgan to overweight from neutral and by Bank of America to buy from neutral. The former cited continued demand momentum in the cruise industry. Other cruise stocks also got a boost, with Norwegian Cruise Line gaining about 9% and Royal Caribbean adding 2%.

Chinook Therapeutics — Shares soared 58% after Novartis announced it has agreed to acquire the biotech firm for up to $3.5 billion. Chinook Therapeutics' shareholders will get $40 per share, about 67% higher than where the stock closed Friday. They may also get an additional $4 per share in cash through contingent value rights.

Nasdaq — Shares fell 11% after the exchange operator announced it was buying Adenza, the software firm owned by Thoma Bravo. The deal is valued at around $10.5 billion.

SentinelOne — The cybersecurity stock popped 7.6% after Morgan Stanley upgraded shares to overweight and called SentinelOne a «long-term share gainer» despite its recent execution troubles.

Oracle — Shares of the IT cloud software company gained 5.5% ahead of its quarterly earnings announcement scheduled for after the bell. Wolfe Research upgraded shares to outperform from peer perform in a Sunday note, citing the company's early-mover advantage in the artificial intelligence boom.

Catalent — The stock jumped about 8% after reporting delayed fiscal third-quarter results before the bell. The pharmaceutical company posted a loss of 9 cents per diluted share, excluding items, and revenue of $1.04 billion. It's unclear if they are compatible with FactSet's consensus estimates on revenue and EPS. CEO Alessandro Maselli said the fundamentals of the