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 July 12 through July 16 include:

• Chairman of Northeast Community Bancorp (NECB) Kenneth Martinek purchased 20,000 shares of company stock at an average price of $10.00 per share for a total transaction amount of $200,000

• Beneficial owner of Dirtt Environmental (DRTT) Shaun Noll purchased 59,700 shares of company stock at an average price of $4.31 per share for a total transaction amount of $257,480

• Beneficial owner of Genesis Park Acquisition (GNPK) Crescent Park purchased 19,395 shares of company stock at an average price of $10.32 per share for a total transaction amount of $200,102

• Beneficial owner of Fast Acquisition (FST) Chatham Asset purchased 135,468 shares of company stock at an average price of $12.97 per share for a total transaction amount of $1,757,264

NOTABLE INSIDER SALES: Significant insider sales reported in the prior week from July 12 through July 16 include:

• Director of Airbnb (ABNB) sold 25,000 shares of company stock at an average price of $143.80 per share for a total transaction amount of $3,595,000

• Officer of C3.ai (AI) Edward Abbo sold 86,768 shares of company stock at an average price of $51.69 per share for a total transaction amount of $4,485,220

• CFO of Amkor Technology (AMKR) Megan Faust sold 5,000 shares of company stock at an average price of $22.43 per share for a total transaction amount of $112,150

• CFO of Carnival Corp (CCL) David Bernstein sold 11,662 shares of company stock at an average price of $23.03 per share for a total transaction amount of $268,633

NOTABLE PRICE MOVEMENT AFTER INSIDER TRANSACTION: Shares of Dirtt Environmental are up approximately 8.5% after insider Shaun Noll purchased 59,700 shares of company stock at $4.31 per share, while shares of Carnival are down 13.5% since insider CFO David Bernstein sold 11,662 shares of company stock at $23.03 per share.