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PROTO LABS INC
PROTO LABS INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q3)
Portfolio Summary: 205 Institutional holders with a total value of $1,876,641,045.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 BROWN CAPITAL MANAGEMENT LLC 2,301,526 154,202,000 8.22%
2 RIVERBRIDGE PARTNERS LLC 1,832,128 122,753,000 6.54%
3 VANGUARD GROUP INC 1,563,187 104,734,000 5.58%
4 JANUS HENDERSON INVESTORS US LLC 968,680 64,902,000 3.46%
5 WELLS FARGO & COMPANY/MN 828,057 55,481,000 2.96%
6 ArrowMark Colorado Holdings LLC 738,723 49,494,000 2.64%
7 BLAIR WILLIAM & CO/IL 733,017 49,111,000 2.62%
8 WASATCH ADVISORS LP 725,206 48,589,000 2.59%
9 TimesSquare Capital Management, LLC 706,500 47,336,000 2.52%
10 Ranger Investment Management, L.P. 674,797 45,211,000 2.41%
11 GW&K Investment Management, LLC 643,206 43,095,000 2.30%
12 LORD, ABBETT & CO. LLC 620,894 41,600,000 2.22%
13 BlackRock Institutional Trust Company, N.A. 569,586 38,162,000 2.03%
14 BlackRock Fund Advisors 554,996 37,185,000 1.98%
15 Conestoga Capital Advisors, LLC 542,002 36,314,000 1.94%
16 Stephens Investment Management Group LLC 541,624 36,289,000 1.93%
17 KORNITZER CAPITAL MANAGEMENT INC /KS 534,770 35,830,000 1.91%
18 Apex Capital Management 516,891 34,632,000 1.85%
19 NORTHERN TRUST CORP 500,399 33,527,000 1.79%
20 NEW YORK STATE COMMON RETIREMENT FUND 462,374 30,979,000 1.65%
21 GOLDMAN SACHS GROUP INC 437,639 29,322,000 1.56%
22 Crestwood Capital Management, L.P. 416,000 27,872,000 1.49%
23 PRICE T ROWE ASSOCIATES INC /MD/ 406,256 27,219,000 1.45%
24 EAGLE ASSET MANAGEMENT INC 405,996 27,201,000 1.45%
25 LOOMIS SAYLES & CO L P 376,969 25,257,000 1.35%
26 STATE STREET CORP 366,099 24,529,000 1.31%
27 SUSQUEHANNA INTERNATIONAL GROUP, LLP 363,800 24,375,000 1.30% Put
28 FIDUCIARY MANAGEMENT ASSOCIATES LLC 341,137 22,856,000 1.22%
29 DIMENSIONAL FUND ADVISORS LP 321,774 21,559,000 1.15%
30 BANK OF AMERICA CORP /DE/ 294,843 19,754,000 1.05%
31 Artisan Partners Limited Partnership 273,477 18,323,000 0.98%
32 DEUTSCHE BANK AG\ 273,294 18,310,000 0.98%
33 ROYAL BANK OF CANADA 265,783 17,807,000 0.95%
34 FRANKLIN RESOURCES INC 265,217 17,769,000 0.95%
35 TAMRO Capital Partners LLC 245,190 16,428,000 0.88%
36 AMERIPRISE FINANCIAL INC 236,558 15,853,000 0.84%
37 TIVERTON ASSET MANAGEMENT LLC 225,000 15,075,000 0.80%
38 Summit Creek Advisors LLC 221,074 14,812,000 0.79%
39 THRIVENT FINANCIAL FOR LUTHERANS 208,632 13,979,000 0.74%
40 FRED ALGER MANAGEMENT, LLC 200,907 13,461,000 0.72%
41 RUSSELL FRANK CO/ 192,880 12,922,000 0.69%
42 Nationwide Fund Advisors 185,467 12,426,000 0.66%
43 Polar Capital LLP 175,177 11,739,000 0.63%
44 PEAK6 Group LLC 174,900 11,718,000 0.62% Put
45 JANUS HENDERSON GROUP PLC 171,804 11,511,000 0.61%
46 Capital Investment Services of America, Inc. 166,466 11,153,000 0.59%
47 GILDER GAGNON HOWE & CO LLC 163,293 10,941,000 0.58%
48 Century Capital Management, LLC 152,448 10,214,000 0.54%
49 NEXT CENTURY GROWTH INVESTORS LLC 150,634 10,092,000 0.54%
50 Quantum Capital Management, LLC / NJ 146,784 9,835,000 0.52%
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From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.