Option Care Health shares surged 22.2% in premarket trading on Tuesday. Drug distributor McKesson and private equity firm Clayton Dubilier & Rice are ​nearing a deal to acquire infusion services provider ‌Option Care Health in a transaction valued at more than $5 billion including debt, the Financial Times reported on Monday, citing people familiar with ​the matter.

Constellation Energy shares gained 3.3% in premarket trading on Tuesday. Google's parent Alphabet is nearing a multi-year deal to ​buy nuclear energy from ‌Constellation Energy for $1 billion or more, Bloomberg News reported on Monday, ​citing people familiar with the ​matter.

SpaceX shares rose 1.3% in premarket trading on Tuesday. Goldman Sachs reiterated its "Buy" rating on SpaceX in a research report, raising the 12-month price target from $220 to $230, while Morgan Stanley reiterated its Overweight rating and $300 price target on the shares.

SK hynix shares dropped 2.3% in premarket trading on Tuesday, as caution ahead of their third-quarter earnings weighed. SK Hynix is expected to release its Q3 report later in October.

Vaxcyte shares fell 3.7% in premarket trading on Tuesday following the company's announcement of dual public offerings totaling $1 billion. Vaxcyte’s stock jumped 30.7% on Monday as pneumococcal vaccine holds its own against Pfizer's, Merck’s shots.