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 January 25 through January 29 include:

• Chairman of Teledyne Technologies (TDY) Robert Mehrabian purchased 10,000 shares of company stock at $366.05 per share for a total transaction value of $3,660,462
• Chairman of B Riley Financial (RILY) Bryant Riley purchased 18,000 shares of company stock at $48.53 per share for a total transaction value of $873,576
• Shareholder of Allied Esports Entertainment (AESE) Knighted Pastures purchased 388,190 shares of company stock at $1.48 per share for a total transaction value of $574,715
• Director of Guaranty Bancshares (GNTY) James Bunch purchased 5,000 shares of company stock at $32.60 per share for a total transaction value of $163,000

NOTABLE INSIDER SALES: Significant insider sales in the prior week from January 25 through January 29 include:

• Chairman of Applied Optoelectronics (AAOI) Chih-Hsiang Lin sold 23,364 shares of company stock at $11.31 per share for a total transaction value of $264,158
• VP of Atlas Air Worldwide (AAWW) Michael Steen sold 39,108 shares of company stock at $57.50 per share for a total transaction value of $2,248,710
• Chairman of Adaptive Biotechnologies (ADPT) Chad Robins sold 30,000 shares of company stock at $59.38 per share for a total transaction value of $1,781,547
• Beneficial owner of Appian (APPN) Abdiel Capital Management sold 95,472 shares of company stock at $219.85 per share for a total transaction value of $20,989,729

NOTABLE PRICE MOVEMENT AFTER INSIDER TRANSACTION: Shares of Allied Esports advanced over 50% after shareholder Knighted Pastures purchased 388,190 shares, while shares of Applied Optoelectronics fell over 5% after chairman Chih-Hsiang Lin sold 23,364 shares.