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Institutional Investment Manager
DF DENT & CO INC
DF DENT & CO INC (CIK: 0000934999) incorporated in Maryland, located at 400 East Pratt Street, Baltimore, MD. Institutional holdings reported to the SEC.

Institutional Holdings (2016Q3)
Portfolio Summary: 165 holdings with a total value of $3,616,103,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 LKQ CORP 5,020,847 178,039,000 4.92%
2 ROPER TECHNOLOGIES INC 864,724 157,786,000 4.36%
3 RED HAT INC 1,888,529 152,650,000 4.22%
4 ANSYS 1,407,925 130,388,000 3.61%
5 ECOLAB INC 1,056,974 128,655,000 3.56%
6 MOODYS CORP 1,116,119 120,853,000 3.34%
7 VISA INC 1,456,262 120,433,000 3.33%
8 SEI INVESTMENTS CO 2,591,832 118,213,000 3.27%
9 INTUITIVE SURGICAL INC 150,851 109,341,000 3.02%
10 WAGEWORKS INC COM 1,740,949 106,041,000 2.93%
11 VERISK ANALYTICS INC 1,283,137 104,293,000 2.88%
12 CARMAX 1,827,205 97,481,000 2.70%
13 CELGENE CORP 914,958 95,641,000 2.64%
14 TYLER TECHNOLOGIES INC 551,772 94,480,000 2.61%
15 MARKEL CORP 100,326 93,180,000 2.58%
16 COSTAR GROUP 424,453 91,907,000 2.54%
17 IMAX CORP COM 3,115,760 90,264,000 2.50%
18 AMERICAN TOWER CORP NEW 773,351 87,644,000 2.42%
19 TRIMBLE INC 3,050,395 87,119,000 2.41%
20 S&P GLOBAL INC 648,227 82,040,000 2.27%
21 TRANSDIGM GROUP INC COM 283,538 81,977,000 2.27%
22 ALPHABET INC 104,422 81,166,000 2.24%
23 FASTENAL CO 1,913,657 79,953,000 2.21%
24 HEALTHCARE SVCS GROUP INC COM 1,977,093 78,253,000 2.16%
25 ILLUMINA INC 388,876 70,643,000 1.95%
26 WASTE CONNECTIONS INC 938,636 70,116,000 1.94%
27 BLACKBAUD INC COM 1,014,480 67,301,000 1.86%
28 SIGNET JEWELERS LIMITED SHS 848,574 63,244,000 1.75%
29 WABTEC 760,074 62,060,000 1.72%
30 STERICYCLE 755,153 60,518,000 1.67%
31 DISCOVER FINANCIAL 1,050,746 59,420,000 1.64%
32 ENVESTNET INC 1,497,322 54,577,000 1.51%
33 MASTERCARD INCORPORATED 534,989 54,446,000 1.51%
34 PRA GROUP INC 1,488,421 51,410,000 1.42%
35 QUALCOMM INC 658,979 45,140,000 1.25%
36 EXPONENT INC COM 788,237 40,247,000 1.11%
37 PROS HOLDINGS INC 1,587,506 35,894,000 0.99%
38 BIO TECHNE CORP 251,814 27,574,000 0.76%
39 CHIPOTLE MEXICAN GRILL INC 49,858 21,115,000 0.58%
40 AAC HLDGS INC COM 1,144,082 19,896,000 0.55%
41 PROCTER AND GAMBLE CO 213,650 19,175,000 0.53%
42 SBA COMMUNICATIONS CORPORATION 150,071 16,832,000 0.47%
43 O REILLY AUTOMOTIVE INC NEW 59,564 16,684,000 0.46%
44 IDEXX LAB 123,164 13,884,000 0.38%
45 INTEL CORP 360,221 13,598,000 0.38%
46 SCHLUMBERGER LTD 157,082 12,353,000 0.34%
47 JOHNSON & JOHNSON 91,079 10,759,000 0.30%
48 PRICE T ROWE GROUP INC 157,114 10,448,000 0.29%
49 FISERV INC 68,953 6,859,000 0.19%
50 FINANCIAL ENGINES INC 227,241 6,751,000 0.19%
Page 1 of 4

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0000934999-16-000029, filed 2016.11.15).

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.