Penn Entertainment, Rivian and Twilio rise premarket; Lyft, WeWork fall By

-- U.S. rose Wednesday,mt4 official website for Android download and install rebounding after the previous session's losses with investors digesting more corporate earnings.

Here are some of the biggest premarket U.S. stock movers today:

• Penn Entertainment(NASDAQ:) stock rose 13% after the online bettor signed a deal with Walt Disney's(NYSE:) ESPN to jointly launch a sports betting business under the brand ESPN Bet. This resulted in the stock of rival DraftKings(NASDAQ:) falling 5.2%.

• Amazon(NASDAQ:) stock rose 0.4% after Reuters reported that the online e-commerce giant is in negotiations over joining a number of other technology firms as an anchor investor in Softbank-owned chip designer Arm's planned initial public offering.

• (NASDAQ:) stock fell 6.6% on concerns the ride-hailing platform's focus on competitive pricing to gain market share would muddy its path to profitability.

• Twilio(NYSE:) stock rose 6.2% after the cloud computing platform operator raised its full-year profit forecast after reporting strong second-quarter .

• (NASDAQ:) stock rose 1.1% after the electric vehicle maker lifted its annual production guidance after a narrower-than-expected loss in the second quarter as it ramped up production.

• (NYSE:) stock rose 0.9% after the Japanese conglomerate raised its full-year sales forecast on the back of expected strength for its PlayStation gaming business, even after reporting a 31% drop in first-quarter profit.

• (NYSE:) stock slumped 9% after the workspace provider raised "substantial" doubt about its ability to continue as a going concern and said three board members had stepped down.

• Service(NYSE:) stock fell 1.3% after UBS downgraded its stance on the delivery giant to ‘neutral’ from ‘buy’, citing margin pressures and lower shipping volumes.

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