Ownership Profile

Shareholder Breakdown

Shareholder Holders Value ($MM) % O/S Shares
Institution 281 2,134.30 95.03 54,848,488
Mutual Fund 318 1,312.77 40.61 23,441,625
Insider 7 0.93 0.03 16,738

Institutional Shareholder Rotation

Shareholder Holders Value Chg ($MM) % O/S Share Change
Buyers 164 449.90 21.27 12,278,995
Sellers 111 -220.19 14.16 -8,173,384
Net -- 229.71 7.11 4,105,611

Institutional Shareholder Concentration

Value ($MM) % O/S Shares
Total Inst. 2,134.30 95.03 54,848,488
Top 10 Inst. 1,015.82 40.22 23,211,433
Top 20 Inst. 1,402.14 60.43 34,878,811
Top 50 Inst. 1,856.39 82.35 47,530,118

Institutional Shareholder Style

Holders Value ($MM) % Inst Shares Shares
Growth 66 527.04 23.35 13,474,351
Aggressive Growth 8 146.54 6.00 3,465,599
Core Growth 39 187.31 8.55 4,933,290
Growth 19 193.19 8.79 5,075,462
Income 5 6.11 0.27 155,028
Income Value 1 5.53 0.25 145,696
Yield 4 0.58 0.02 9,332
Index 25 665.71 22.89 13,213,940
Other 92 607.02 32.76 18,906,175
Broker Dealer 17 26.23 1.20 690,802
GARP 31 151.97 6.85 3,956,050
Hedge Fund 37 331.76 17.96 10,363,376
Sector Specific 2 75.47 3.44 1,987,750
Specialty 2 4.48 0.20 117,858
VC/Private Equi 3 17.12 3.10 1,790,339
Value 35 232.70 9.16 5,284,478
Core Value 28 223.86 8.75 5,051,730
Deep Value 7 8.84 0.40 232,748

Top Holders: Institutional Investor

Holder Shares Held % O/S Share Change Filing Date
The Vanguard Group, Inc. 5,886,548 10.20 223,566 2/28/19
BlackRock Institutional Trust Company, N.A. 3,823,109 6.62 191,550 12/31/18
Fred Alger Management, Inc. 2,694,375 4.67 -489,705 1/31/19
Lord, Abbett & Co. LLC 1,810,966 3.14 365,261 12/31/18
TimesSquare Capital Management, LLC 1,640,570 2.84 548,070 12/31/18
Federated Global Investment Management Corp. 1,608,270 2.79 70 12/31/18
Emerald Advisers LLC 1,481,884 2.57 249,312 12/31/18
Two Sigma Investments, LP 1,441,548 2.50 -481,343 12/31/18
Renaissance Technologies LLC 1,412,327 2.45 1,016,733 12/31/18
Corrib Capital Management L.P. 1,411,836 2.45 -3,088,164 4/30/18
Delphi Ventures L.P. 1,366,803 2.37 1,000,000 3/31/18
Frontier Capital Management Company, LLC 1,312,885 2.27 -143,493 12/31/18
State Street Global Advisors (US) 1,275,179 2.21 125,142 12/31/18
Blickenstaff (Kim D) 1,236,494 2.14 750,000 3/31/18
Point72 Asset Management, L.P. 1,206,107 2.09 378,108 12/31/18
Ardevora Asset Management LLP 1,099,836 1.91 236,440 12/31/18
Wellington Management Company, LLP 1,059,633 1.84 1,016,666 2/28/19
Eagle Asset Management, Inc. 1,050,438 1.82 259,791 12/31/18
Redmile Group, LLC 1,039,750 1.80 -29,920 12/31/18
Deutsche Asset Management Americas 1,020,253 1.77 588,710 12/31/18
DexCom Inc 1,000,000 1.73 -1,500,000 12/31/18
OrbiMed Advisors, LLC 948,000 1.64 233,500 12/31/18
Columbus Circle Investors 848,842 1.47 806,335 12/31/18
Millennium Management LLC 653,689 1.13 -107,311 12/31/18
Geode Capital Management, L.L.C. 647,594 1.12 61,922 12/31/18
Northern Trust Investments, Inc. 614,324 1.06 15,583 12/31/18
Friess Associates LLC 588,221 1.02 88,366 12/31/18
Deerfield Management Company, L.P. 553,765 0.96 270,650 12/31/18
AQR Capital Management, LLC 540,036 0.94 161,526 12/31/18
Armistice Capital LLC 531,354 0.92 531,354 10/13/17
Daruma Capital Management, LLC 498,957 0.86 498,957 12/31/18
Hood River Capital Management LLC 454,368 0.79 5,678 12/31/18
Baillie Gifford & Co. 434,700 0.75 -- 12/31/18
Wasatch Advisors, Inc. 371,271 0.64 23,426 12/31/18
Driehaus Capital Management, LLC 350,066 0.61 138,206 12/31/18
Goldman Sachs Asset Management (US) 330,683 0.57 157,588 12/31/18
Charles Schwab Investment Management, Inc. 300,589 0.52 -1,137 12/31/18
CastleArk Management, LLC 280,180 0.49 -71,670 12/31/18
First Light Asset Management, LLC 263,883 0.46 -- 12/31/18
Ivy Investment Management Company 262,793 0.46 262,793 12/31/18
TPG Capital, L.P. 249,620 0.43 -- 12/31/18
Cavanaugh (Kevin M) 239,100 0.41 239,100 4/30/18
Schonfeld Strategic Advisors LLC 231,987 0.40 -597,277 12/31/18
Columbia Wanger Asset Management, LLC 229,319 0.40 30,333 12/31/18
T. Rowe Price Associates, Inc. 227,390 0.39 -19,502 12/31/18
Oberweis Asset Management, Inc. 224,860 0.39 -190 12/31/18
Sectoral Asset Management Inc. 203,067 0.35 160,100 12/31/18
Nuveen LLC 198,320 0.34 230 12/31/18
Fidelity Management & Research Company 189,707 0.33 51,352 12/31/18
Goldman Sachs & Company, Inc. 184,622 0.32 -437,868 12/31/18

* Insider values reflect direct beneficial ownership.

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