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

Institutional Holders (2015Q4)
Portfolio Summary: 218 Institutional holders with a total value of $1,794,833,841.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 BROWN CAPITAL MANAGEMENT LLC 2,596,629 165,379,000 9.21%
2 RIVERBRIDGE PARTNERS LLC 1,783,365 113,583,000 6.33%
3 VANGUARD GROUP INC 1,603,922 102,154,000 5.69%
4 JANUS HENDERSON INVESTORS US LLC 1,239,523 78,945,000 4.40%
5 WELLS FARGO & COMPANY/MN 829,858 52,854,000 2.94%
6 ABDIEL CAPITAL ADVISORS, LLC 794,545 50,605,000 2.82%
7 BLAIR WILLIAM & CO/IL 738,661 47,045,000 2.62%
8 TimesSquare Capital Management, LLC 723,650 46,089,000 2.57%
9 GW&K Investment Management, LLC 631,736 40,235,000 2.24%
10 WASATCH ADVISORS LP 627,391 39,959,000 2.23%
11 BlackRock Institutional Trust Company, N.A. 580,710 36,985,000 2.06%
12 BlackRock Fund Advisors 579,228 36,891,000 2.06%
13 LORD, ABBETT & CO. LLC 543,779 34,633,000 1.93%
14 Stephens Investment Management Group LLC 530,261 33,772,000 1.88%
15 Apex Capital Management 522,097 33,252,000 1.85%
16 KORNITZER CAPITAL MANAGEMENT INC /KS 515,515 32,833,000 1.83%
17 NEW YORK STATE COMMON RETIREMENT FUND 514,944 32,797,000 1.83%
18 NORTHERN TRUST CORP 505,411 32,190,000 1.79%
19 Crestwood Capital Management, L.P. 499,200 31,794,000 1.77%
20 Conestoga Capital Advisors, LLC 496,118 31,598,000 1.76%
21 ArrowMark Colorado Holdings LLC 492,168 31,346,000 1.75%
22 LOOMIS SAYLES & CO L P 413,680 26,348,000 1.47%
23 PRICE T ROWE ASSOCIATES INC /MD/ 410,136 26,122,000 1.46%
24 FIDUCIARY MANAGEMENT ASSOCIATES LLC 405,172 25,806,000 1.44%
25 Ranger Investment Management, L.P. 385,700 24,565,000 1.37%
26 STATE STREET CORP 370,488 23,593,000 1.31%
27 EAGLE ASSET MANAGEMENT INC 368,583 23,475,000 1.31%
28 Artisan Partners Limited Partnership 319,682 20,361,000 1.13%
29 DIMENSIONAL FUND ADVISORS LP 317,295 20,209,000 1.13%
30 BANK OF AMERICA CORP /DE/ 289,164 18,418,000 1.03%
31 AMERIPRISE FINANCIAL INC 273,151 17,398,000 0.97%
32 ROYAL BANK OF CANADA 266,585 16,978,000 0.95%
33 Polar Capital LLP 243,380 15,501,000 0.86%
34 THRIVENT FINANCIAL FOR LUTHERANS 235,432 14,994,000 0.84%
35 MAIRS & POWER INC 218,219 13,898,000 0.77%
36 FRANKLIN RESOURCES INC 213,897 13,623,000 0.76%
37 Quantum Capital Management, LLC / NJ 212,174 13,513,000 0.75%
38 Nationwide Fund Advisors 211,474 13,469,000 0.75%
39 FRED ALGER MANAGEMENT, LLC 210,962 13,436,000 0.75%
40 Summit Creek Advisors LLC 207,826 13,236,000 0.74%
41 PEAK6 Group LLC 196,300 12,502,000 0.70% Put
42 RUSSELL FRANK CO/ 188,001 12,065,000 0.67%
43 TIVERTON ASSET MANAGEMENT LLC 185,000 11,783,000 0.66%
44 Century Capital Management, LLC 180,712 11,510,000 0.64%
45 NORGES BANK 176,827 11,262,000 0.63%
46 JANUS HENDERSON GROUP PLC 174,574 11,119,000 0.62%
47 Capital Investment Services of America, Inc. 172,431 10,982,000 0.61%
48 GILDER GAGNON HOWE & CO LLC 166,697 10,617,000 0.59%
49 GEODE CAPITAL MANAGEMENT, LLC 146,124 9,306,000 0.52%
50 PEAK6 Group LLC 140,200 8,929,000 0.50% Call
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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.