Condensed consolidated statements of operations Three Months Ended Year Ended December 31, December 31, (In thousands, except per 2017 2016 2017 2016 share data; unaudited) Revenue $123,426 $88,623 $430,492 $311,999 Cost of revenue 34,958 25,582 127,422 93,900 Gross profit 88,468 63,041 303,070 218,099 Operating expenses: Research and development 30,779 24,383 115,291 91,067 Sales and marketing 64,035 47,566 220,742 166,987 General and administrative 22,177 16,222 81,680 64,371 Total operating expenses 116,991 88,171 417,713 322,425 Operating loss (28,523) (25,130) (114,643) (104,326) Other income, net 1,142 775 2,487 1,520 Loss before provision for (benefit from) income taxes (27,381) (24,355) (112,156) (102,806) Provision for (benefit from) income taxes (732) 193 (1,518) 993 Net loss $(26,649) $(24,548) $(110,638) $(103,799) Net loss per share, basic and diluted $(0.26) $(0.26) $(1.11) $(1.11) Weighted-average shares used to compute net loss per share, 102,044 95,793 99,918 93,161 basic and diluted Zendesk Shareholder Letter Q4 2017 - 15

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