Viking Fund Management Llc Buys Apergy Corp, Delek US Holdings Inc, Noble Energy Inc, Sells Diamondback Energy Inc, US Silica Holdings Inc, RSP Permian Inc

• New Purchases: APY, DK, FTI, WLL, HES, FTSI, NBR, WFC, AVGO, CVIA,
• Added Positions: NBL, WPX, PXD, WMB, AROC, MRO, TRP, PRU, WTTR, FRAC,
• Reduced Positions: SLCA, RSPP, ANDV, PE, ENB, OKE, RES, CPE, PSX, CNP,
• Sold Out: FANG, CJ, CSCO, SND, CF,

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

1. Kinder Morgan Inc (KMI) - 1,231,000 shares, 4.18% of the total portfolio. Shares added by 0.49%
2. Williams Companies Inc (WMB) - 699,000 shares, 3.64% of the total portfolio. Shares added by 27.72%
3. Pioneer Natural Resources Co (PXD) - 99,000 shares, 3.6% of the total portfolio. Shares added by 52.31%
4. Exxon Mobil Corp (XOM) - 203,500 shares, 3.24% of the total portfolio. Shares added by 2.01%
5. Halliburton Co (HAL) - 345,000 shares, 2.99% of the total portfolio. Shares reduced by 4.17%

Viking Fund Management Llc initiated holding in Apergy Corp. The purchase prices were between $36.93 and $45.53, with an estimated average price of $40.34. The stock is now traded at around $37.96. The impact to a portfolio due to this purchase was 2.25%. The holding were 280,000 shares as of 2018-06-30.

Viking Fund Management Llc initiated holding in Delek US Holdings Inc. The purchase prices were between $40 and $59.81, with an estimated average price of $49.62. The stock is now traded at around $47.28. The impact to a portfolio due to this purchase was 1.83%. The holding were 190,000 shares as of 2018-06-30.

Viking Fund Management Llc initiated holding in TechnipFMC PLC. The purchase prices were between $28.43 and $34.19, with an estimated average price of $32.04. The stock is now traded at around $30.58. The impact to a portfolio due to this purchase was 1.31%. The holding were 215,000 shares as of 2018-06-30.

Viking Fund Management Llc initiated holding in Whiting Petroleum Corp. The purchase prices were between $32.74 and $55.46, with an estimated average price of $45.98. The stock is now traded at around $49.19. The impact to a portfolio due to this purchase was 0.81%. The holding were 80,000 shares as of 2018-06-30.

Viking Fund Management Llc initiated holding in Hess Corp. The purchase prices were between $48.5 and $66.89, with an estimated average price of $59.73. The stock is now traded at around $63.88. The impact to a portfolio due to this purchase was 0.77%. The holding were 60,000 shares as of 2018-06-30.

Viking Fund Management Llc initiated holding in FTS International Inc. The purchase prices were between $14.24 and $21.92, with an estimated average price of $18.26. The stock is now traded at around $12.30. The impact to a portfolio due to this purchase was 0.58%. The holding were 210,000 shares as of 2018-06-30.

Viking Fund Management Llc added to a holding in Noble Energy Inc by 200.00%. The purchase prices were between $29.11 and $36.93, with an estimated average price of $33.97. The stock is now traded at around $34.86. The impact to a portfolio due to this purchase was 1.36%. The holding were 300,000 shares as of 2018-06-30.

Viking Fund Management Llc added to a holding in WPX Energy Inc by 92.31%. The purchase prices were between $13.12 and $19.17, with an estimated average price of $17.11. The stock is now traded at around $18.43. The impact to a portfolio due to this purchase was 1.25%. The holding were 750,000 shares as of 2018-06-30.

Viking Fund Management Llc added to a holding in Pioneer Natural Resources Co by 52.31%. The purchase prices were between $166.91 and $212.31, with an estimated average price of $191.51. The stock is now traded at around $183.00. The impact to a portfolio due to this purchase was 1.24%. The holding were 99,000 shares as of 2018-06-30.

Viking Fund Management Llc added to a holding in Williams Companies Inc by 27.72%. The purchase prices were between $24.38 and $28.01, with an estimated average price of $26.36. The stock is now traded at around $27.26. The impact to a portfolio due to this purchase was 0.79%. The holding were 699,000 shares as of 2018-06-30.

Viking Fund Management Llc added to a holding in Archrock Inc by 30.14%. The purchase prices were between $8.35 and $12.35, with an estimated average price of $11.05. The stock is now traded at around $12.70. The impact to a portfolio due to this purchase was 0.41%. The holding were 760,000 shares as of 2018-06-30.

Viking Fund Management Llc added to a holding in Marathon Oil Corp by 39.13%. The purchase prices were between $15.57 and $21.9, with an estimated average price of $19.69. The stock is now traded at around $20.04. The impact to a portfolio due to this purchase was 0.36%. The holding were 320,000 shares as of 2018-06-30.

Viking Fund Management Llc sold out a holding in Diamondback Energy Inc. The sale prices were between $111.55 and $136.76, with an estimated average price of $124.11.

Viking Fund Management Llc sold out a holding in C&J Energy Services Inc. The sale prices were between $22.95 and $31.38, with an estimated average price of $27.47.

Viking Fund Management Llc sold out a holding in Cisco Systems Inc. The sale prices were between $40.73 and $46.3, with an estimated average price of $43.71.

Viking Fund Management Llc sold out a holding in Smart Sand Inc. The sale prices were between $4.94 and $7.95, with an estimated average price of $6.35.

Viking Fund Management Llc sold out a holding in CF Industries Holdings Inc. The sale prices were between $36.62 and $45.95, with an estimated average price of $40.76.