National Instruments Corporation announced unaudited consolidated earnings results for fourth quarter and full year ended December 31, 2015. For the quarter, the company reported total net sales of $334,339,000, operating income of $50,002,000, income before income taxes of $44,192,000, net income of $32,134,000 or $0.25 per diluted share, non-GAAP operating income of $61,686,000, non-GAAP income before income taxes of $60,080,000, non-GAAP net income of $43,301,000 or $0.34 per diluted share EBITDA of $62,958,000 or $0.49 per diluted share compared to the total net sales of $332,776,000, operating income of $55,035,000, income before income taxes of $53,778,000, net income of $43,385,000 or $0.34 per diluted share, non-GAAP operating income of $65,832,000, non-GAAP income before income taxes of $64,740,000, non-GAAP net income of $51,365,000 or $0.4 per diluted share EBITDA of $72,667,000 or $0.57 per diluted share for the same quarter a year ago.

For the year, the company reported total net sales of $1,225,456,000, operating income of $137,171,000, income before income taxes of $131,278,000, net income of $95,262,000 or $0.74 per diluted share, net cash provided by operating activities of $162,732,000, capital expenditures of $33,984,000, additions to other intangibles of $2,811,000, non-GAAP operating income of $179,559,000, non-GAAP income before income taxes of $178,319,000, non-GAAP net income of $128,304,000 or $1.00 per diluted share EBITDA of $204,269,000 or $1.67 per diluted share compared to the total net sales of $1,243,862,000, operating income of $145,187,000, income before income taxes of $144,001,000, net income of $126,333,000 or $0.99 per diluted share, net cash provided by operating activities of $195,106,000, capital expenditures of $44,944,000, additions to other intangibles of $2,834,000, non-GAAP operating income of $187,108,000, non-GAAP income before income taxes of $186,594,000, non-GAAP net income of $155,992,000 or $1.22 per diluted share EBITDA of $213,216,000 or $1.67 per diluted share for the previous year.

For the first quarter ending March 31, 2016, the company expects revenue to be in the range of $290 million to $320 million. The company currently expects that GAAP fully diluted EPS will be in the range of $0.09 to $0.21 for first quarter, with non-GAAP fully diluted EPS expected to be in the range of $0.17 to $0.29. In first quarter, it currently expects its non-GAAP effective tax rate to be approximately 21%.