William Blair Investment Management, Llc Buys Alibaba Group Holding, Copart Inc, Ctrip.com International, Sells The Toronto-Dominion Bank, TransDigm Group Inc, Mead Johnson Nutrition Co

• New Purchases: MIK, TRU, INDA, RSX, EEFT, WB, KMX, FQVLF, WIX, SINA,
• Added Positions: BABA, CPRT, CTRP, BWXT, LOPE, MTN, UNH, MXL, EFX, CNI,
• Reduced Positions: TD, TDG, AKAM, CERN, ULTA, HLF, WLTW, MTD, TSM, ODFL,
• Sold Out: MJN, ANCUF, DG, GIB, BIDU, G, FDS, BWA, WOOF, LXFT,

For the details of WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's stock buys and sells, go to http://www.gurufocus.com/StockBuy.php?GuruName=WILLIAM+BLAIR+INVESTMENT+MANAGEMENT%2C+LLC

1. Alibaba Group Holding Ltd (BABA) - 7,603,566 shares, 3.1% of the total portfolio. Shares added by 69.21%
2. Taiwan Semiconductor Manufacturing Co Ltd (TSM) - 17,666,683 shares, 2.2% of the total portfolio. Shares reduced by 11.46%
3. SPDR S&P 500 (SPY) - 1,996,424 shares, 1.78% of the total portfolio. Shares reduced by 8.62%
4. Vantiv Inc (VNTV) - 5,769,789 shares, 1.4% of the total portfolio. Shares added by 3.06%
5. Copart Inc (CPRT) - 22,002,180 shares, 1.29% of the total portfolio. Shares added by 163.44%

William Blair Investment Management, Llc initiated holdings in The Michaels Companies Inc. The purchase prices were between $19.35 and $22.64, with an estimated average price of $21.02. The stock is now traded at around $22.08. The impact to the portfolio due to this purchase was 0.36%. The holdings were 4,240,011 shares as of 2017-03-31.

William Blair Investment Management, Llc initiated holdings in TransUnion. The purchase prices were between $30.96 and $38.51, with an estimated average price of $35.14. The stock is now traded at around $41.38. The impact to the portfolio due to this purchase was 0.34%. The holdings were 2,322,141 shares as of 2017-03-31.

William Blair Investment Management, Llc initiated holdings in Ishares MSCI India. The purchase prices were between $26.81 and $31.6, with an estimated average price of $29.25. The stock is now traded at around $23.60. The impact to the portfolio due to this purchase was 0.29%. The holdings were 2,435,295 shares as of 2017-03-31.

William Blair Investment Management, Llc initiated holdings in VanEck Vectors Russia. The purchase prices were between $19.34 and $22.08, with an estimated average price of $21.06. The stock is now traded at around $20.66. The impact to the portfolio due to this purchase was 0.28%. The holdings were 3,632,400 shares as of 2017-03-31.

William Blair Investment Management, Llc initiated holdings in Euronet Worldwide Inc. The purchase prices were between $71.22 and $85.52, with an estimated average price of $78.6. The stock is now traded at around $85.31. The impact to the portfolio due to this purchase was 0.27%. The holdings were 839,346 shares as of 2017-03-31.

William Blair Investment Management, Llc initiated holdings in Weibo Corp. The purchase prices were between $41.55 and $58.21, with an estimated average price of $49.76. The stock is now traded at around $62.51. The impact to the portfolio due to this purchase was 0.21%. The holdings were 1,074,507 shares as of 2017-03-31.

William Blair Investment Management, Llc added to the holdings in Alibaba Group Holding Ltd by 69.21%. The purchase prices were between $88.6 and $109.51, with an estimated average price of $101.77. The stock is now traded at around $119.98. The impact to the portfolio due to this purchase was 1.27%. The holdings were 7,603,566 shares as of 2017-03-31.

William Blair Investment Management, Llc added to the holdings in Copart Inc by 163.44%. The purchase prices were between $27.83 and $31.2, with an estimated average price of $29.42. The stock is now traded at around $30.17. The impact to the portfolio due to this purchase was 0.8%. The holdings were 22,002,180 shares as of 2017-03-31.

William Blair Investment Management, Llc added to the holdings in Ctrip.com International Ltd by 297.94%. The purchase prices were between $40.49 and $49.76, with an estimated average price of $45.82. The stock is now traded at around $56.13. The impact to the portfolio due to this purchase was 0.57%. The holdings were 4,083,783 shares as of 2017-03-31.

William Blair Investment Management, Llc added to the holdings in BWX Technologies Inc by 83.41%. The purchase prices were between $39.22 and $48.1, with an estimated average price of $43.66. The stock is now traded at around $50.26. The impact to the portfolio due to this purchase was 0.48%. The holdings were 5,853,746 shares as of 2017-03-31.

William Blair Investment Management, Llc added to the holdings in Vail Resorts Inc by 76.79%. The purchase prices were between $160.98 and $191.9, with an estimated average price of $177.17. The stock is now traded at around $201.19. The impact to the portfolio due to this purchase was 0.41%. The holdings were 1,312,463 shares as of 2017-03-31.

William Blair Investment Management, Llc added to the holdings in Grand Canyon Education Inc by 1271.13%. The purchase prices were between $56.87 and $71.74, with an estimated average price of $62.1. The stock is now traded at around $78.40. The impact to the portfolio due to this purchase was 0.41%. The holdings were 1,608,593 shares as of 2017-03-31.

William Blair Investment Management, Llc sold out the holdings in Mead Johnson Nutrition Co. The sale prices were between $69.5 and $89.08, with an estimated average price of $82.24.

William Blair Investment Management, Llc sold out the holdings in Alimentation Couche-Tard Inc. The sale prices were between $43.26 and $47.89, with an estimated average price of $45.85.

William Blair Investment Management, Llc sold out the holdings in Dollar General Corp. The sale prices were between $68.55 and $77.86, with an estimated average price of $73.24.

William Blair Investment Management, Llc sold out the holdings in CGI Group Inc. The sale prices were between $45.98 and $49.73, with an estimated average price of $47.98.

William Blair Investment Management, Llc sold out the holdings in Baidu Inc. The sale prices were between $168.26 and $186.01, with an estimated average price of $175.99.

William Blair Investment Management, Llc sold out the holdings in Genpact Ltd. The sale prices were between $23.77 and $25.2, with an estimated average price of $24.38.