1. Performance Units were granted on 2/19/2014, with a performance period ending upon the close of the Company's 2016 fiscal year. Number of units reported reflect the total number of shares earned as a result of the achievement of Company specified performance criteria for the performance period. Each performance unit converted to one share of WNC common stock as of date of vesting on 2/19/2017.

2. Performance Units were granted on February 22, 2017, subject to achievement of performance period criteria for a three-year period, ending upon the close of the Company's 2019 fiscal year. The number of units reported assume the Company meets target performance criteria at the end of 2019; actual units earned will be adjusted based on actual performance against the performance criteria. Any earned units will vest on February 22, 2020, at which time each earned and vested unit will convert to one share of the Company's common stock.

3. Restricted Stock Unit award vesting February 22, 2020.

4. Performance Units were granted on 2/19/2014, with a performance period ending upon the close of the Company's 2016 fiscal year. Number of units reported reflect those additional shares earned over and above the units reported on the Form 4 filed on 2/26/2014 as a result of the achievement of Company specified performance criteria for the performance period.