Dark
Light
System
Institutional Investment Manager
BLAIR WILLIAM & CO/IL
BLAIR WILLIAM & CO/IL (CIK: 0000902367) incorporated in Delaware, located at 150 North Riverside Plaza, Chicago, IL. Institutional holdings reported to the SEC.

Institutional Holdings (2015Q3)
Portfolio Summary: 1,426 holdings with a total value of $11,559,051,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 APPLE INC 2,662,539 293,677,000 2.54%
2 GILEAD SCIENCES INC 2,800,131 274,944,000 2.38%
3 STARBUCKS CORP 3,697,121 210,144,000 1.82%
4 VISA INC 2,852,553 198,708,000 1.72%
5 IDEXX LAB 2,534,311 188,172,000 1.63%
6 STERICYCLE 1,267,093 176,518,000 1.53%
7 AMAZON COM INC 298,905 153,006,000 1.32%
8 AFFILIATED MANAGERS GROUP 893,817 152,833,000 1.32%
9 MASTERCARD INCORPORATED 1,630,124 146,906,000 1.27%
10 EXPRESS SCRIPTS HLDG CO 1,582,294 128,102,000 1.11%
11 FASTENAL CO 3,329,931 121,909,000 1.05%
12 RED HAT INC 1,636,826 117,654,000 1.02%
13 BRISTOL MYERS SQUIBB CO 1,930,930 114,310,000 0.99%
14 WALGREENS BOOTS ALLIANCE INC 1,325,656 110,161,000 0.95%
15 DANAHER CORP DEL 1,229,960 104,805,000 0.91%
16 CERNER CORP 1,683,711 100,955,000 0.87%
17 ISHARES NASDAQ BIOTECHNOLOGY ETF 157,965 100,840,000 0.87%
18 GOOGLE INC 159,865 97,264,000 0.84%
19 SCHLUMBERGER LTD 1,398,410 96,448,000 0.83%
20 FACEBOOK INC 1,050,039 94,398,000 0.82%
21 VERISK ANALYTICS INC 1,206,349 89,161,000 0.77%
22 PRA GROUP INC 1,669,363 88,342,000 0.76%
23 CELGENE CORP 811,161 87,743,000 0.76%
24 DEXCOM 1,018,485 87,447,000 0.76%
25 ECOLAB INC 776,672 85,216,000 0.74%
26 ADOBE INC 995,749 81,870,000 0.71%
27 O REILLY AUTOMOTIVE INC NEW 326,893 81,723,000 0.71%
28 Ultimate Software Group Inc 443,545 79,398,000 0.69%
29 WEX INC 890,638 77,343,000 0.67%
30 LOWES COS INC 1,105,791 76,211,000 0.66%
31 EOG RES INC 1,033,646 75,249,000 0.65%
32 TRANSDIGM GROUP INC COM 347,065 73,720,000 0.64%
33 MICROSOFT CORP 1,654,787 73,240,000 0.63%
34 SALESFORCE COM INC 1,051,353 72,995,000 0.63%
35 GOLDMAN SACHS GROUP INC 397,684 69,101,000 0.60%
36 WILLIAMS SONOMA INC COM 904,799 69,081,000 0.60%
37 SPDR S&P 500 ETF TR 351,672 67,390,000 0.58%
38 COSTCO WHSL CORP NEW 465,168 67,249,000 0.58%
39 COSTAR GROUP 383,178 66,312,000 0.57%
40 PRICELINE GRP INC 51,037 63,125,000 0.55%
41 INTERCONTINENTAL EXCHANGE IN 267,154 62,778,000 0.54%
42 PRAXAIR INC 593,885 60,493,000 0.52%
43 AMETEK 1,151,494 60,245,000 0.52%
44 GUIDEWIRE SOFTWARE INC 1,108,578 58,288,000 0.50%
45 SIRONA DENTAL SYS INC 619,825 57,854,000 0.50%
46 COLGATE PALMOLIVE CO 905,169 57,441,000 0.50%
47 TRACTOR SUPPLY CO 680,991 57,420,000 0.50%
48 MEAD JOHNSON NUTRITION CO 814,447 57,336,000 0.50%
49 JOHNSON & JOHNSON 613,827 57,300,000 0.50%
50 GRAINGER W W INC 264,488 56,867,000 0.49%
Page 1 of 29

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001144204-15-064430, filed 2015.11.12).

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.