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After-hours buzz: Tesla, Intel, Broadcom & more

Check out which companies are making headlines after the bell Wednesday:

Tesla - The electric-car maker filed notice it intends to go to court to appeal New Jersey's ruling that would stop it from selling its vehicles in the state within two weeks. The notice was filed last week to the state appellate division. Shares were largely unchanged in extended-hours trading.

Read MoreStocks end higher for 4th-straight day; S&P closes at new high

Piper Jaffray upgraded Intel to "overweight" from "neutral" and downgraded Broadcom to "neutral" from "overweight." Intel shares ticked higher in extended-hours trading, while Broadcom dipped.

Cypress Semiconductor - The semiconductor manufacturer announced that CFO Brad Buss will retire from his post. In addition, the company said it expects its first quarter sales to be above the high end of its guidance of $169 million to $171 million. Shares were flat after being temporarily halted in extended-hours trading.

Newfield Exploration - The oil and gas company was upgraded to "buy" from "neutral" at UBS. Shares rose in extended-hours trading.

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