Arent Fox capped off its most profitable year ever in 2017, said chairman Mark Katz, building on revenue and profit growth that has kept up unabated since 2009.

The Washington-based firm increased revenue nearly 7 percentage points last year to $303.5 million, according to preliminary ALM reporting. Revenue per lawyer ticked up 3.4 percent, to $877,000, as the firm added 11 lawyers for a total attorney head count of 346.