Welcome to "Fly Insider," The Fly's weekly recap of notable insider stock transactions.

NOTABLE INSIDER PURCHASES: Significant insider purchases reported in the prior week from May 6 through May 10 include: 

• CEO of Realogy (RLGY) Ryan Schneider purchased 119,300 shares of company stock at $8.38 per share for a total transaction value of $999,734 
• Chairman of Regulus Therapeutics (RGLS) Stelios Papadopoulos purchased 370,370 shares of company stock at $1.08 per share for a total transaction value of $400,000 
• Chairman of Opko Health (OPK) Phillip Frost purchased 285,000 shares of company stock at $2.06 per share for a total transaction value of $585,789 
• Chairman of Ultra Clean Holdings (UCTT) Clarence Granger purchased 44,000 shares of company stock at $14.18 per share for a total transaction value of $623,902 
• Chairman of Fluor (FLR) Alan Boeckmann purchased 16,000 shares of company stock at $29.81 per share for a total transaction value of $476,960 
• Director of First Financial Bankshares (FFIN) Johnny Trotter purchased 5,000 shares of company stock at $61.29 per share for a total transaction value of $306,450 
• Officer of Genuine Parts (GPC) Scott Sonnemaker purchased 5,000 shares of company stock at $99.01 per share for a total transaction value of $495,050 
• Director of Alleghany Corp (Y) Lauren Tyler purchased 1,485 shares of company stock at an average price of $668.61 for a total transaction value of $992,885 
• Chairman of AG Mortgage Investment Trust (MITT) David Roberts purchased 50,000 shares of company stock at $16.53 per share for a total transaction value of $826,500 
• Director of MGM Resorts International (MGM) purchased 800,000 shares of company stock at an average price of $25.40 per share for a total transaction value of $20,322,240 

NOTABLE INSIDER SALES: Significant insider sales reported in the prior week from May 6 through May 10 include: 

• CFO of TrueBlue (TBI) Derrek Gafford sold 40,000 shares of company stock at $24.16 per share for a total transaction value of $966,432 
• CEO of American Homes 4 Rent (AMH) David Singelyn sold 1,040,000 shares of company stock at $23.67 per share for a total transaction value of $24,615,448 
• Director of Appfolio (APPF) William Rauth sold 20,000 shares of company stock at $96.11 per share for a total transaction value of $1,922,206 
• Director of Exelixis (EXEL) Lance Willsey sold 50,000 shares of company stock at $20.36 per share for a total transaction value of $1,018,000 
• VP of Hudson Pacific Properties (HPP) Christopher Barton sold 27,756 shares of company stock at $34.67 per share for a total transaction value of $962,228 
• VP of Neenah (NP) Larry Brownlee sold 5,000 shares of company stock at an average price of $62.52 per share for a total transaction value of $312,600 

NOTABLE PRICE MOVEMENT AFTER INSIDER TRANSACTIONS: Regulus Therapeutics is up approximately 13% since its  chairman purchased 370,370 shares, while Exelixis is down approximately 9% since a director sold 50,000 shares.