NXSTAGE MEDICAL INC

CUSIP: 67072V103 Class: COMMON STOCK

FRED ALGER MANAGEMENT, LLC's Holding History (CIK: 0000003520)

Note: Option positions (PUT/CALL) are excluded.

Q3 2013
Shares 1,054,230 Value ($000) $13,874 Avg Close — Range —
Q2 2013
Shares 1,090,707 Value ($000) $15,575 Avg Close — Range —