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

Institutional Holders (2016Q3)
Portfolio Summary: 223 Institutional holders with a total value of $1,720,230,649.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 BROWN CAPITAL MANAGEMENT LLC 3,012,802 180,497,000 10.49%
2 VANGUARD GROUP INC 1,929,313 115,584,000 6.72%
3 RIVERBRIDGE PARTNERS LLC 1,902,885 114,002,000 6.63%
4 BlackRock Fund Advisors 1,654,935 99,147,000 5.76%
5 TimesSquare Capital Management, LLC 1,449,500 86,840,000 5.05%
6 JANUS HENDERSON INVESTORS US LLC 1,157,278 69,333,000 4.03%
7 ABDIEL CAPITAL ADVISORS, LLC 923,508 55,327,000 3.22%
8 ArrowMark Colorado Holdings LLC 903,930 54,154,000 3.15%
9 GW&K Investment Management, LLC 715,401 42,860,000 2.49%
10 JPMORGAN CHASE & CO 709,989 42,534,000 2.47%
11 Bank of New York Mellon Corp 697,355 41,779,000 2.43%
12 Fiera Capital Corp 651,019 39,003,000 2.27%
13 NEW YORK STATE COMMON RETIREMENT FUND 636,495 38,132,000 2.22%
14 BlackRock Institutional Trust Company, N.A. 601,757 36,051,000 2.10%
15 Stephens Investment Management Group LLC 578,329 34,648,000 2.01%
16 NORTHERN TRUST CORP 543,135 32,539,000 1.89%
17 Conestoga Capital Advisors, LLC 536,946 32,168,000 1.87%
18 STATE STREET CORP 487,377 29,203,000 1.70%
19 Capital Research Global Investors 466,700 27,960,000 1.63%
20 NORGES BANK 445,166 25,473,000 1.48%
21 MAIRS & POWER INC 367,599 22,023,000 1.28%
22 Artisan Partners Limited Partnership 351,545 21,061,000 1.22%
23 BLAIR WILLIAM & CO/IL 318,218 19,064,000 1.11%
24 EAGLE ASSET MANAGEMENT INC 310,866 18,623,000 1.08%
25 DIMENSIONAL FUND ADVISORS LP 308,180 18,463,000 1.07%
26 WADDELL & REED FINANCIAL INC 304,184 18,224,000 1.06%
27 BANK OF AMERICA CORP /DE/ 284,298 17,033,000 0.99%
28 Crestwood Capital Management, L.P. 275,600 16,511,000 0.96%
29 Quantum Capital Management, LLC / NJ 271,772 16,282,000 0.95%
30 RICE HALL JAMES & ASSOCIATES, LLC 270,386 16,199,000 0.94%
31 JANUS HENDERSON GROUP PLC 265,647 15,915,000 0.93%
32 ROYAL BANK OF CANADA 263,515 15,787,000 0.92%
33 KORNITZER CAPITAL MANAGEMENT INC /KS 231,855 13,890,000 0.81%
34 THRIVENT FINANCIAL FOR LUTHERANS 227,752 13,645,000 0.79%
35 FRED ALGER MANAGEMENT, LLC 203,468 12,190,000 0.71%
36 Nationwide Fund Advisors 195,003 11,683,000 0.68%
37 AMERIPRISE FINANCIAL INC 191,484 11,473,000 0.67%
38 PRINCIPAL FINANCIAL GROUP INC 179,194 10,736,000 0.62%
39 Capital Investment Services of America, Inc. 174,257 10,440,000 0.61%
40 TIVERTON ASSET MANAGEMENT LLC 170,157 10,194,000 0.59%
41 GEODE CAPITAL MANAGEMENT, LLC 163,793 9,812,000 0.57%
42 WEATHERBIE CAPITAL, LLC 129,062 7,732,000 0.45%
43 Century Capital Management, LLC 120,383 7,212,000 0.42%
44 Granahan Investment Management, LLC 114,050 6,833,000 0.40%
45 SEI INVESTMENTS CO 110,373 6,612,000 0.38%
46 AMERICAN CAPITAL MANAGEMENT INC 109,901 6,584,000 0.38%
47 BlackRock Investment Management, LLC 103,630 6,208,000 0.36%
48 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 94,466 5,660,000 0.33%
49 WELLS FARGO & COMPANY/MN 92,066 5,516,000 0.32%
50 SUSQUEHANNA INTERNATIONAL GROUP, LLP 91,400 5,476,000 0.32% Put
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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.