AutoNation, the country’s largest car dealership chain, shrugged off winter storms that cut auto sales early this year and posted a nearly 15 percent increase in first-quarter net income.

The Fort Lauderdale company said it made $95.1 million, or 78 cents per share, from January through March. That compares with $83 million, or 67 cents per share, a year earlier. Revenue grew 6.5 percent to $4.36 billion.