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 November 28 through December 2 include:

•  Chairman of Hughes Corp (HHC) William Ackman purchased 1,560,205 shares of company stock at $70 per share for a total transaction amount of $109,214,194

• Chairman of Energy Transfer (ET) Kelcy Warren purchased 1,300,000 shares of company stock at $12.390 per share for a total transaction amount of $16,107,000

•  CEO of Acer Therapeutics (ACER) Chris Schelling purchased 819,672 shares of company stock at $1.22 per share for a total transaction amount of $1,000,000

• CEO of Vapotherm (VAPO) Joseph Army purchased 750,000 shares of company stock at 76c per share for a total transaction amount of $570,000

NOTABLE INSIDER SALES: Significant insider sales in the prior week from November 28 through December 2 include:

• VP of Archer-Daniels-Midland (ADM) Cameron Findlay sold 26,198 shares of company stock at $96.62 per share for a total transaction amount of $2,531,332

• Officer of Applovin (APP) Vasily Shikin sold 1,285,590 shares of company stock at $13.70 per share for a total transaction amount of $17,611,555

•  Director of Analog Devices (ADI) James Champy sold 5,547 shares of company stock at $170 per share for a total transaction amount of $942,990

• VP of Agilent Technologies(A) JacobThaysen sold 12,935 shares of company stock at $154.89 per share for a total transaction amount of $2,003,440

NOTABLE PRICE MOVEMENT AFTER INSIDER TRANSACTION: Shares of Vapotherm moved higher by over 100% after the CEO Joseph Army purchased 750K shares of company stock at 76c per share, while shares of Applovin moved lower by approximately 7% after officer Vasily Shikin sold 1.29M  shares of company stock at $13.70 per share.