Ron Baron Buys Momo Inc, Wix.com, Acuity Brands Inc, Sells Fastenal Co, CBRE Group Inc, CarMax Inc

• New Purchases: MOMO, CLAC, WBT, JBT, WYN, REVG, BITA, CBOE, BYD, INVH,
• Added Positions: WIX, AYI, QLYS, YPF, MRCY, LEXEA, AMZN, TTD, TSM, TSLA,
• Reduced Positions: IDXX, IT, FAST, CBG, KMX, MIDD, GLPI, ULTI, FLT, INCR,
• Sold Out: Q, JLL, GSM, GGP, KW, HSTM, INDA, RL, AGN, NBL,

For the details of Ron Baron's stock buys and sells, go to http://www.gurufocus.com/StockBuy.php?GuruName=Ron+Baron

1. Vail Resorts Inc (MTN) - 5,201,182 shares, 5.29% of the total portfolio. Shares reduced by 1.25%
2. Arch Capital Group Ltd (ACGL) - 8,649,326 shares, 4.34% of the total portfolio. Shares reduced by 1.33%
3. IDEXX Laboratories Inc (IDXX) - 5,069,276 shares, 4.15% of the total portfolio. Shares reduced by 10.92%
4. Gartner Inc (IT) - 6,995,166 shares, 4% of the total portfolio. Shares reduced by 6.77%
5. CoStar Group Inc (CSGP) - 2,999,386 shares, 3.29% of the total portfolio. Shares added by 0.05%

Ron Baron initiated holdings in Momo Inc. The purchase prices were between $18.3 and $35.52, with an estimated average price of $26.68. The stock is now traded at around $40.11. The impact to the portfolio due to this purchase was 0.28%. The holdings were 1,565,924 shares as of 2017-03-31.

Ron Baron initiated holdings in Capitol Acquisition Corp III. The purchase prices were between $9.93 and $10.58, with an estimated average price of $10.11. The stock is now traded at around $10.35. The impact to the portfolio due to this purchase was 0.17%. The holdings were 3,000,000 shares as of 2017-03-31.

Ron Baron initiated holdings in Welbilt Inc. The purchase prices were between $18.25 and $19.75, with an estimated average price of $19.15. The stock is now traded at around $19.91. The impact to the portfolio due to this purchase was 0.15%. The holdings were 1,400,000 shares as of 2017-03-31.

Ron Baron initiated holdings in John Bean Technologies Corp. The purchase prices were between $81.85 and $89.9, with an estimated average price of $86.65. The stock is now traded at around $87.10. The impact to the portfolio due to this purchase was 0.14%. The holdings were 300,000 shares as of 2017-03-31.

Ron Baron initiated holdings in Wyndham Worldwide Corp. The purchase prices were between $75.93 and $85.79, with an estimated average price of $81.32. The stock is now traded at around $96.24. The impact to the portfolio due to this purchase was 0.13%. The holdings were 289,740 shares as of 2017-03-31.

Ron Baron initiated holdings in REV Group Inc. The purchase prices were between $25 and $28.86, with an estimated average price of $27.11. The stock is now traded at around $25.83. The impact to the portfolio due to this purchase was 0.11%. The holdings were 750,000 shares as of 2017-03-31.

Ron Baron added to the holdings in Wix.com Ltd by 605.78%. The purchase prices were between $44.95 and $69.25, with an estimated average price of $58.78. The stock is now traded at around $78.40. The impact to the portfolio due to this purchase was 0.22%. The holdings were 709,308 shares as of 2017-03-31.

Ron Baron added to the holdings in Acuity Brands Inc by 42.39%. The purchase prices were between $198.59 and $239.93, with an estimated average price of $211.24. The stock is now traded at around $175.77. The impact to the portfolio due to this purchase was 0.21%. The holdings were 640,753 shares as of 2017-03-31.

Ron Baron added to the holdings in Qualys Inc by 769.40%. The purchase prices were between $32.55 and $37.9, with an estimated average price of $35.13. The stock is now traded at around $43.65. The impact to the portfolio due to this purchase was 0.12%. The holdings were 721,600 shares as of 2017-03-31.

Ron Baron added to the holdings in YPF SA by 57.22%. The purchase prices were between $16.85 and $24.28, with an estimated average price of $21.54. The stock is now traded at around $24.52. The impact to the portfolio due to this purchase was 0.11%. The holdings were 2,335,136 shares as of 2017-03-31.

Ron Baron added to the holdings in Mercury Systems Inc by 71.93%. The purchase prices were between $29.66 and $40.2, with an estimated average price of $35.55. The stock is now traded at around $40.07. The impact to the portfolio due to this purchase was 0.1%. The holdings were 1,117,000 shares as of 2017-03-31.

Ron Baron added to the holdings in Liberty Expedia Holdings Inc by 69.49%. The purchase prices were between $39.86 and $47.05, with an estimated average price of $43.97. The stock is now traded at around $51.72. The impact to the portfolio due to this purchase was 0.09%. The holdings were 922,000 shares as of 2017-03-31.

Ron Baron sold out the holdings in Quintiles IMS Holdings Inc. The sale prices were between $75.35 and $82.3, with an estimated average price of $78.04.

Ron Baron sold out the holdings in Ferroglobe PLC. The sale prices were between $9.25 and $12.32, with an estimated average price of $10.53.

Ron Baron sold out the holdings in Jones Lang LaSalle Inc. The sale prices were between $99.21 and $117.53, with an estimated average price of $108.75.

Ron Baron sold out the holdings in GGP Inc. The sale prices were between $22.66 and $26, with an estimated average price of $24.46.

Ron Baron sold out the holdings in Kennedy-Wilson Holdings Inc. The sale prices were between $19.95 and $22.5, with an estimated average price of $21.05.

Ron Baron sold out the holdings in HealthStream Inc. The sale prices were between $21.45 and $25.56, with an estimated average price of $23.31.

Ron Baron reduced to the holdings in Fastenal Co by 52.28%. The sale prices were between $46.17 and $52.22, with an estimated average price of $50.13. The stock is now traded at around $44.20. The impact to the portfolio due to this sale was -0.26%. Ron Baron still held 885,673 shares as of 2017-03-31.

Ron Baron reduced to the holdings in CBRE Group Inc by 30.63%. The sale prices were between $30.04 and $36.43, with an estimated average price of $33.44. The stock is now traded at around $34.58. The impact to the portfolio due to this sale was -0.22%. Ron Baron still held 2,842,252 shares as of 2017-03-31.

Ron Baron reduced to the holdings in CarMax Inc by 49.86%. The sale prices were between $58.87 and $68.6, with an estimated average price of $64.97. The stock is now traded at around $61.14. The impact to the portfolio due to this sale was -0.19%. Ron Baron still held 534,830 shares as of 2017-03-31.

Ron Baron reduced to the holdings in The Ultimate Software Group Inc by 27.66%. The sale prices were between $186.13 and $201.14, with an estimated average price of $194.72. The stock is now traded at around $212.11. The impact to the portfolio due to this sale was -0.18%. Ron Baron still held 467,474 shares as of 2017-03-31.

Ron Baron reduced to the holdings in Fleetcor Technologies Inc by 21.78%. The sale prices were between $144.65 and $170, with an estimated average price of $156.75. The stock is now traded at around $140.12. The impact to the portfolio due to this sale was -0.17%. Ron Baron still held 741,906 shares as of 2017-03-31.

Ron Baron reduced to the holdings in INC Research Holdings Inc by 42.31%. The sale prices were between $43.45 and $56.55, with an estimated average price of $49.75. The stock is now traded at around $56.10. The impact to the portfolio due to this sale was -0.17%. Ron Baron still held 750,000 shares as of 2017-03-31.