Marshall Wace North America, L.P. Buys Microsoft Corp, Citigroup Inc, Cboe Global Markets Inc, Sells Alphabet Inc, CVS Health Corp, Time Warner Inc

• New Purchases: C, CBOE, WFC, ACGL, YUM, FCX, VFC, HRC, CC, ADT,
• Added Positions: MSFT, MCD, QSR, ALXN, XL, AMZN, DG, HII, ALL, MSCI,
• Reduced Positions: GOOGL, CVS, TWX, TMUS, DRI, FB, PCG, ITW, FRC, PFE,
• Sold Out: MFC, HPQ, AET, BLUE, CHTR, BMRN, DE, MO, CLVS, DIS,

For the details of Marshall Wace North America, L.P.'s stock buys and sells, go to http://www.gurufocus.com/StockBuy.php?GuruName=Marshall+Wace+North+America%2C+L.P.

1. Microsoft Corp (MSFT) - 5,441,701 shares, 2.49% of the total portfolio. Shares added by 194.00%
2. Boston Scientific Corp (BSX) - 11,516,273 shares, 1.58% of the total portfolio. Shares added by 11.69%
3. S&P Global Inc (SPGI) - 1,654,401 shares, 1.58% of the total portfolio. Shares added by 30.53%
4. Facebook Inc (FB) - 1,898,988 shares, 1.52% of the total portfolio. Shares reduced by 23.9%
5. Johnson & Johnson (JNJ) - 2,026,198 shares, 1.3% of the total portfolio. Shares reduced by 1.99%

Marshall Wace North America, L.P. initiated holding in Citigroup Inc. The purchase prices were between $67.5 and $80.08, with an estimated average price of $75.21. The stock is now traded at around $72.68. The impact to a portfolio due to this purchase was 0.82%. The holding were 2,429,984 shares as of 2018-03-31.

Marshall Wace North America, L.P. initiated holding in Cboe Global Markets Inc. The purchase prices were between $107.11 and $137.16, with an estimated average price of $121.55. The stock is now traded at around $108.11. The impact to a portfolio due to this purchase was 0.71%. The holding were 1,248,922 shares as of 2018-03-31.

Marshall Wace North America, L.P. initiated holding in Wells Fargo & Co. The purchase prices were between $50.98 and $65.93, with an estimated average price of $59.4. The stock is now traded at around $54.75. The impact to a portfolio due to this purchase was 0.5%. The holding were 1,896,423 shares as of 2018-03-31.

Marshall Wace North America, L.P. initiated holding in Arch Capital Group Ltd. The purchase prices were between $83.41 and $93.41, with an estimated average price of $88.27. The stock is now traded at around $78.14. The impact to a portfolio due to this purchase was 0.41%. The holding were 962,657 shares as of 2018-03-31.

Marshall Wace North America, L.P. initiated holding in Yum Brands Inc. The purchase prices were between $76.3 and $86.48, with an estimated average price of $81.97. The stock is now traded at around $83.34. The impact to a portfolio due to this purchase was 0.4%. The holding were 935,631 shares as of 2018-03-31.

Marshall Wace North America, L.P. initiated holding in Freeport-McMoRan Inc. The purchase prices were between $16.75 and $19.99, with an estimated average price of $18.79. The stock is now traded at around $15.96. The impact to a portfolio due to this purchase was 0.24%. The holding were 2,700,315 shares as of 2018-03-31.

Marshall Wace North America, L.P. added to a holding in Microsoft Corp by 194.00%. The purchase prices were between $85.01 and $96.77, with an estimated average price of $91.45. The stock is now traded at around $97.32. The impact to a portfolio due to this purchase was 1.64%. The holding were 5,441,701 shares as of 2018-03-31.

Marshall Wace North America, L.P. added to a holding in McDonald's Corp by 590.29%. The purchase prices were between $148.27 and $178.36, with an estimated average price of $164.51. The stock is now traded at around $163.06. The impact to a portfolio due to this purchase was 0.62%. The holding were 921,943 shares as of 2018-03-31.

Marshall Wace North America, L.P. added to a holding in Restaurant Brands International Inc by 370.63%. The purchase prices were between $55.61 and $63.86, with an estimated average price of $59.39. The stock is now traded at around $56.31. The impact to a portfolio due to this purchase was 0.61%. The holding were 2,722,977 shares as of 2018-03-31.

Marshall Wace North America, L.P. added to a holding in Alexion Pharmaceuticals Inc by 958.72%. The purchase prices were between $108.33 and $128.09, with an estimated average price of $119.53. The stock is now traded at around $121.55. The impact to a portfolio due to this purchase was 0.55%. The holding were 1,084,891 shares as of 2018-03-31.

Marshall Wace North America, L.P. added to a holding in XL Group Ltd by 503.13%. The purchase prices were between $34.02 and $55.92, with an estimated average price of $43.89. The stock is now traded at around $55.22. The impact to a portfolio due to this purchase was 0.53%. The holding were 2,260,982 shares as of 2018-03-31.

Marshall Wace North America, L.P. added to a holding in Amazon.com Inc by 244.49%. The purchase prices were between $1189.01 and $1598.39, with an estimated average price of $1430.19. The stock is now traded at around $1576.12. The impact to a portfolio due to this purchase was 0.51%. The holding were 99,972 shares as of 2018-03-31.

Marshall Wace North America, L.P. sold out a holding in Manulife Financial Corp. The sale prices were between $18.31 and $21.99, with an estimated average price of $20.01.

Marshall Wace North America, L.P. sold out a holding in HP Inc. The sale prices were between $19.92 and $24.65, with an estimated average price of $22.58.

Marshall Wace North America, L.P. sold out a holding in Aetna Inc. The sale prices were between $168.11 and $193.74, with an estimated average price of $179.7.

Marshall Wace North America, L.P. sold out a holding in bluebird bio Inc. The sale prices were between $163.35 and $233.05, with an estimated average price of $196.36.

Marshall Wace North America, L.P. sold out a holding in Charter Communications Inc. The sale prices were between $306.26 and $387.5, with an estimated average price of $351.59.

Marshall Wace North America, L.P. sold out a holding in Biomarin Pharmaceutical Inc. The sale prices were between $77.67 and $92.63, with an estimated average price of $85.82.

Marshall Wace North America, L.P. reduced to a holding in Alphabet Inc by 83.64%. The sale prices were between $1005.18 and $1187.56, with an estimated average price of $1108.89. The stock is now traded at around $1084.87. The impact to a portfolio due to this sale was -1.5%. Marshall Wace North America, L.P. still held 50,269 shares as of 2018-03-31.

Marshall Wace North America, L.P. reduced to a holding in CVS Health Corp by 93.44%. The sale prices were between $60.6 and $83.63, with an estimated average price of $71.75. The stock is now traded at around $65.84. The impact to a portfolio due to this sale was -0.79%. Marshall Wace North America, L.P. still held 138,784 shares as of 2018-03-31.

Marshall Wace North America, L.P. reduced to a holding in Time Warner Inc by 69.44%. The sale prices were between $91.5 and $97, with an estimated average price of $94.24. The stock is now traded at around $94.42. The impact to a portfolio due to this sale was -0.77%. Marshall Wace North America, L.P. still held 668,850 shares as of 2018-03-31.

Marshall Wace North America, L.P. reduced to a holding in T-Mobile US Inc by 89.58%. The sale prices were between $57.69 and $65.6, with an estimated average price of $62.56. The stock is now traded at around $56.37. The impact to a portfolio due to this sale was -0.69%. Marshall Wace North America, L.P. still held 229,032 shares as of 2018-03-31.

Marshall Wace North America, L.P. reduced to a holding in Facebook Inc by 23.9%. The sale prices were between $152.22 and $193.09, with an estimated average price of $179.55. The stock is now traded at around $184.32. The impact to a portfolio due to this sale was -0.58%. Marshall Wace North America, L.P. still held 1,898,988 shares as of 2018-03-31.

Marshall Wace North America, L.P. reduced to a holding in Darden Restaurants Inc by 95.02%. The sale prices were between $84.22 and $99.31, with an estimated average price of $94.69. The stock is now traded at around $87.30. The impact to a portfolio due to this sale was -0.58%. Marshall Wace North America, L.P. still held 57,605 shares as of 2018-03-31.