Ownership Profile

Shareholder Breakdown
Shareholder Holders Values ($) % O/S Shares
Institution 247 1,695 99.02 64,574,419
Mutual Fund 273 767 43.43 28,322,694
Institutional Shareholder Rotation
Shareholder Holders Values Change ($) % O/S Shares Change
Buyers 111 162.27 9.46 6,166,546
Sellers 107 -192.61 11.26 -7,344,171
Net -- -30.34 1.80 -1,177,625
Institutional Shareholder Concentration
Shareholder Values ($) % O/S Shares
Top 10 Inst. 952 55.70 36,328,078
Top 20 Inst. 1,227.97 71.75 46,790,621
Top 50 Inst. 1,505.69 87.97 57,370,345
Total Inst. 1,505.69 87.97 57,370,345
Institutional Shareholder Style
Shareholder Holders Values ($) % O/S Shares
Index 27 325 19.01 12,398,509
AggresGr 6 25 1.41 922,161
CoreGrowth 42 171 9.98 6,506,542
Growth 17 52 3.04 1,984,702
IncomeValue 3 7 0.41 267,767
Yield 4 1 0.03 21,274
BrokerDealer 15 14 0.84 548,666
GARP 24 372 21.75 14,186,947
HedgeFund 40 559 32.67 21,306,171
SectorSpecific 1 10 0.61 400,000
Specialty 2 0 0.02 13,647
CoreValue 20 84 4.90 3,195,168
DeepValue 5 14 0.81 529,679
Momentum 1 0 0.00 2,989
Top Holders: Institutional Investor
Holder Shares Held % O/S Shares Change Filing Date
Fidelity Management & Research Company 7,234,302 11.09 -1,967,005 12/31/2016
Gilder Gagnon Howe & Co. LLC 5,749,761 8.82 -140,948 12/31/2016
The Vanguard Group, Inc. 4,861,529 7.45 149,086 12/31/2016
Deerfield Management Company, L.P. 4,258,196 6.53 159,021 12/31/2016
BlackRock Institutional Trust Company, N.A. 3,812,049 5.85 272,442 12/31/2016
Oracle Investment Management, Inc. 2,721,636 4.17 49,700 12/31/2016
Invesco Advisers, Inc. 2,468,181 3.78 -449 12/31/2016
Perceptive Advisors LLC 1,927,989 2.96 258,286 12/31/2016
Pennant Capital Management, LLC 1,927,408 2.96 1,530,043 12/31/2016
Cortina Asset Management L.L.C. 1,367,027 2.10 -115,179 12/31/2016
Jennison Associates LLC 1,343,520 2.06 28,263 12/31/2016
Victory Capital Management Inc. 1,324,269 2.03 -465,070 12/31/2016
State Street Global Advisors (US) 1,208,700 1.85 26,359 12/31/2016
Wells Capital Management Inc. 1,135,401 1.74 -57,185 12/31/2016
Waddell & Reed Investment Management Company 1,112,619 1.71 25,850 12/31/2016
Burbank (Jeffrey H) 942,086 1.44 -3,000 04/19/2017
Sectoral Asset Management Inc. 891,313 1.37 -308,556 12/31/2016
MFS Investment Management 842,552 1.29 -131,865 12/31/2016
William Blair & Company, L.L.C. 831,476 1.27 -26,385 12/31/2016
OppenheimerFunds, Inc. 830,607 1.27 35,386 12/31/2016
Northern Trust Investments, Inc. 722,954 1.11 8,311 12/31/2016
Arrowstreet Capital, Limited Partnership 616,483 0.95 164,770 12/31/2016
Portolan Capital Management, L.L.C. 576,263 0.88 44,021 12/31/2016
Next Century Growth Investors, LLC 565,814 0.87 565,814 12/31/2016
Geode Capital Management, L.L.C. 563,669 0.86 74,046 12/31/2016
Two Sigma Investments, LP 548,519 0.84 -40,949 12/31/2016
Broadview Advisors, LLC 507,156 0.78 4,550 12/31/2016
Altrinsic Global Advisors, LLC 466,300 0.72 -60,000 12/31/2016
Norges Bank Investment Management (NBIM) 451,758 0.69 374,440 12/31/2016
William Blair Investment Management, LLC 444,156 0.68 -6,875 12/31/2016
Polar Capital LLP 400,000 0.61 300,000 12/31/2016
Tamarack Advisers, LP 367,690 0.56 -707,310 12/31/2016
TIAA Global Asset Management 339,467 0.52 -7,330 12/31/2016
Nuveen Asset Management, LLC 313,554 0.48 23,084 12/31/2016
D. E. Shaw & Co., L.P. 295,494 0.45 -20,818 12/31/2016
Millennium Management LLC 289,547 0.44 -558,868 12/31/2016
The Boston Company Asset Management, LLC 281,769 0.43 -2,283 12/31/2016
Charles Schwab Investment Management, Inc. 259,710 0.40 -70,074 12/31/2016
Pura Vida Investments, LLC 257,500 0.39 -107,500 12/31/2016
First Light Asset Management, LLC 247,015 0.38 -3,371 12/31/2016
BlackRock Investment Management, LLC 238,118 0.37 -715 12/31/2016
Dafna Capital Management, LLC 236,119 0.36 -2,390 12/31/2016
Marshall Wace LLP 228,002 0.35 228,002 12/31/2016
Pier Capital, LLC 214,363 0.33 -8,988 12/31/2016
Granahan Investment Management, Inc. 212,539 0.33 0 12/31/2016
BlackRock Financial Management, Inc. 203,367 0.31 23,652 12/31/2016
BNY Mellon Asset Management 191,056 0.29 -4,861 12/31/2016
Morgan Stanley & Co. LLC 185,325 0.28 79,057 12/31/2016
Henderson Geneva Capital Management 181,017 0.28 181,017 02/28/2017
Delta Lloyd Asset Management N.V. 175,000 0.27 0 12/31/2016

Ownership data is provided by Thompson Reuters, a third party service, and NxStage Medical, Inc. does not maintain or provide information directly to this service.