X0306 4 2016-11-16 false 0001333170 NxStage Medical, Inc. NXTM 0001341403 Turk Joseph E Jr 350 MERRIMACK STREET LAWRENCE MA 01843 false true false false President Common Stock 2016-11-16 4 S false 22500 26.26 D 80780 D This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 15, 2016. This represents the weighted average price for shares sold in multiple transactions at prices ranging from $26.16 to $26.59, inclusive. Full information regarding the number of shares sold at each separate price within the range will be provided to NxStage Medical, Inc., any security holder of NxStage Medical, Inc. or the staff of the Securities and Exchange Commission, upon request. Aras Lapinskas, attorney-in-fact for Joseph Turk 2016-11-16