Ownership Profile

Shareholder Breakdown
Shareholder Holders Values ($) % O/S Shares
Institution 251 1,741 98.51 64,752,833
Mutual Fund 278 819 46.74 30,726,015
Institutional Shareholder Rotation
Shareholder Holders Values Change ($) % O/S Shares Change
Buyers 115 178.16 10.12 6,649,141
Sellers 121 -176.97 10.06 -6,610,985
Net -- 1.19 0.06 38,156
Institutional Shareholder Concentration
Shareholder Values ($) % O/S Shares
Top 10 Inst. 969 54.94 36,117,375
Top 20 Inst. 1,242.86 70.31 46,216,334
Top 50 Inst. 1,541.16 87.21 57,329,018
Total Inst. 1,541.16 87.21 57,329,018
Institutional Shareholder Style
Shareholder Holders Values ($) % O/S Shares
Index 25 347 19.71 12,955,318
AggresGr 6 25 1.40 918,514
CoreGrowth 39 221 12.52 8,230,159
Growth 17 35 1.99 1,306,272
IncomeValue 3 6 0.36 236,326
Yield 4 1 0.03 21,394
BrokerDealer 20 12 0.69 450,804
GARP 23 388 21.99 14,452,157
HedgeFund 39 532 30.17 19,830,662
SectorSpecific 1 15 0.82 541,612
Specialty 2 4 0.23 153,358
CoreValue 23 77 4.38 2,880,542
DeepValue 7 15 0.87 574,032
Momentum 1 0 0.00 2,989
Top Holders: Institutional Investor
Holder Shares Held % O/S Shares Change Filing Date
Fidelity Management & Research Company 7,360,501 11.20 126,199 03/31/2017
The Vanguard Group, Inc. 5,273,762 8.02 412,233 03/31/2017
Gilder Gagnon Howe & Co. LLC 4,955,630 7.54 -794,131 03/31/2017
BlackRock Institutional Trust Company, N.A. 3,871,913 5.89 59,864 03/31/2017
Deerfield Management Company, L.P. 3,744,151 5.70 -514,045 03/31/2017
Oracle Investment Management, Inc. 2,721,906 4.14 270 03/31/2017
Invesco Advisers, Inc. 2,410,415 3.67 -57,766 03/31/2017
Eagle Asset Management, Inc. 2,033,500 3.09 2,033,500 03/31/2017
Pennant Capital Management, LLC 1,927,408 2.93 0 03/31/2017
Perceptive Advisors LLC 1,818,189 2.77 -109,800 03/31/2017
Victory Capital Management Inc. 1,414,099 2.15 89,830 03/31/2017
OppenheimerFunds, Inc. 1,284,754 1.95 454,147 03/31/2017
State Street Global Advisors (US) 1,236,803 1.88 28,103 03/31/2017
Waddell & Reed Investment Management Company 1,073,849 1.63 -38,770 03/31/2017
Cortina Asset Management L.L.C. 1,011,828 1.54 -355,199 03/31/2017
Burbank (Jeffrey H) 939,086 1.43 -6,000 04/20/2017
Wells Capital Management Inc. 928,043 1.41 -207,358 03/31/2017
William Blair & Company, L.L.C. 772,334 1.17 -59,142 03/31/2017
Northern Trust Investments, Inc. 729,217 1.11 6,263 03/31/2017
Loomis, Sayles & Company, L.P. 708,946 1.08 556,780 03/31/2017
Jennison Associates LLC 651,222 0.99 -692,298 03/31/2017
Two Sigma Investments, LP 606,681 0.92 58,162 03/31/2017
Geode Capital Management, L.L.C. 594,983 0.91 31,314 03/31/2017
MFS Investment Management 590,275 0.90 -252,277 03/31/2017
Next Century Growth Investors, LLC 545,480 0.83 -20,334 03/31/2017
Portolan Capital Management, L.L.C. 545,032 0.83 -31,231 03/31/2017
Polar Capital LLP 541,612 0.82 141,612 03/31/2017
Arrowstreet Capital, Limited Partnership 541,134 0.82 -75,349 03/31/2017
Sectoral Asset Management Inc. 504,568 0.77 -386,745 03/31/2017
Henderson Global Investors Ltd. 473,630 0.72 473,630 03/31/2017
Norges Bank Investment Management (NBIM) 451,758 0.69 151,799 12/31/2016
Altrinsic Global Advisors, LLC 436,300 0.66 -30,000 03/31/2017
Broadview Advisors, LLC 401,356 0.61 -105,800 03/31/2017
Millennium Management LLC 380,232 0.58 90,685 03/31/2017
TIAA Global Asset Management 332,484 0.51 -6,983 03/31/2017
William Blair Investment Management, LLC 331,204 0.50 -112,952 03/31/2017
D. E. Shaw & Co., L.P. 320,226 0.49 24,732 03/31/2017
Charles Schwab Investment Management, Inc. 277,899 0.42 18,189 03/31/2017
Pura Vida Investments, LLC 275,000 0.42 17,500 03/31/2017
BlackRock Investment Management, LLC 233,178 0.35 -4,940 03/31/2017
The Boston Company Asset Management, LLC 230,662 0.35 -51,107 03/31/2017
Granahan Investment Management, Inc. 226,000 0.34 13,461 12/31/2016
Dafna Capital Management, LLC 216,119 0.33 -20,000 03/31/2017
BlackRock Financial Management, Inc. 212,771 0.32 9,404 03/31/2017
Pier Capital, LLC 212,526 0.32 -1,837 03/31/2017
Clough Capital Partners, LP 212,300 0.32 192,000 03/31/2017
Ghost Tree Capital, LLC 200,000 0.30 200,000 03/31/2017
BNY Mellon Asset Management 192,523 0.29 1,467 03/31/2017
Advisory Research, Inc. 190,406 0.29 78,563 03/31/2017
Henderson Geneva Capital Management 185,123 0.28 -2,455 04/30/2017

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