Revenue during the quarter surged 30.77 percent to $1,170.69 million from $895.20 million in the previous year period. Gross margin for the quarter contracted 187 basis points over the previous year period to 47.98 percent. Total expenses were 84.83 percent of quarterly revenues, up from 83.66 percent for the same period last year. That has resulted in a contraction of 117 basis points in operating margin to 15.17 percent.

Operating income for the quarter was $177.58 million, compared with $146.30 million in the previous year period.

Kevin Plank, chairman and chief executive officer of Under Armour, Inc., stated, "Our core business remains incredibly strong and our 31% net revenue growth in the fourth quarter is clear evidence of the continued expansion in the breadth and depth of our Brand. We delivered our 25th consecutive quarter of more than 20% net revenues growth in our largest product category of apparel."

For fiscal year 2016, Under Armour, Inc. expects revenue to be $4,950 million and expects operating income to be $503 million.

Operating cash flow turns negative
Under Armour, Inc. has spent $44.10 million cash to meet operating activities during the year as against cash inflow of $219.03 million in the last year.

The company has spent $847.48 million cash to meet investing activities during the year as against cash outgo of $152.31 million in the last year.

Cash flow from financing activities was $440.08 million for the year, up 141.40 percent or $257.77 million, when compared with the last year.

Cash and cash equivalents stood at $129.85 million as on Dec. 31, 2015, down 78.11 percent or $463.32 million from $593.18 million on Dec. 31, 2014.

Working capital declines
Under Armour, Inc. has witnessed a decline in the working capital over the last year. It stood at $1,019.95 million as at Dec. 31, 2015, down 9.56 percent or $107.82 million from $1,127.77 million on Dec. 31, 2014. Current ratio was at 3.13 as on Dec. 31, 2015, down from 3.67 on Dec. 31, 2014.

Cash conversion cycle (CCC) has increased to 61 days for the quarter from 48 days for the last year period. Days sales outstanding went up to 17 days for the quarter compared with 14 days for the same period last year.

Days inventory outstanding has increased to 59 days for the quarter compared with 55 days for the previous year period. At the same time, days payable outstanding went down to 15 days for the quarter from 22 for the same period last year.

Debt increases substantially
Under Armour, Inc. has witnessed an increase in total debt over the last one year. It stood at $669 million as on Dec. 31, 2015, up 135.40 percent or $384.80 million from $284.20 million on Dec. 31, 2014. Total debt was 23.32 percent of total assets as on Dec. 31, 2015, compared with 13.57 percent on Dec. 31, 2014. Debt to equity ratio was at 0.40 as on Dec. 31, 2015, up from 0.21 as on Dec. 31, 2014.