Take a look at some of Tuesday's midday movers:
Lear hit a record high. CNBC reported activist investor Mick McGuire of Marcato had urged the company to split its car seat and electrical parts businesses into two publicly traded companies. Lear responded by saying it did receive a letter from Marcato and that it takes all input from its shareholders seriously and will evaluate the proposal.
Target traded higher on news that the big-box store named Mike McNamara, a former executive at British retailer Tesco, as its new chief information officer.
The New York Times surged after posting better-than-expected fourth quarter results as digital growth offset continued weakness in its print operations.
Isis Pharmaceuticals plummeted after the firm's experimental diabetes drug took a longer than expected 36 weeks to reduce blood sugar levels in patients with type 2 diabetes.
Lending Club gained ground after the online debt provider partnered with Alibaba to make it easier for American businesses to buy from Chinese suppliers.
AutoNation hit a record high after having the automobile retailer had its best January since 2006.
Twitter moved higher after the microblog site announced a partnership with the digital news reader Flipboard that gives brands advertising on Twitter the ability to expand their campaigns into Flipboard.
McGraw Hill Financial advanced after the company and its Standard & Poor ratings services unit reached a $1.38 billion settlement with the U.S. government and several states over ratings of mortgage-backed securities that went sour in the run-up to the 2008 financial crisis.
JPMorgan rose on news the financial institution agreed to pay $500 million to end more than 6 years of class action litigation over Bear Stearns' sale of $17.58 billion of mortgage securities that proved defective during the financial crisis.
HCA Holdings fell after the country's largest hospital operator forecasted 2015 profit below Street estimates.
National Oilwell Varco slid after warning of a challenging oil market in 2015 after orders in its rig technology business plunged nearly 90 percent in the fourth quarter.
Gannett gained ground after posting better-than-expected quarterly results helped by higher spending on political advertising and increased TV re-transmission revenue.
Arch Coal jumped after saying it expects lower costs in 2015. The coal miner and producer did suspend its annual dividend, citing weak coal prices.