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 October 5 through October 9, include:

• Beneficial owner of Arcutis Biotherapeutics (ARQT) Orbimed Advisors purchased 496,000 shares of company stock at $25 per share for a total transaction of $12,400,000
  

• Beneficial owner of Marchex (MCHX) Edenbrook Capital purchased 5,000,000 shares of company stock at $2.15 per share for a total transaction of $10,750,000

• Chairman of Element Solutions (ESI) Martin Franklin purchased 500,000 shares of company stock at $11.50 per share for a total transaction of $5,750,000

• Director of Selecta Biosciences (SELB) Timothy Springer purchased 3,185,394 shares of company stock at $1.71 per share for a total transaction of $5,445,113

• CEO of Kubient (KBNT) Peter Bordes purchased 19,742 shares of company stock at $2.58 per share for a total transaction of $51,031

NOTABLE INSIDER SALES: Significant insider sales reported in the prior week, from October 5 through October 9, include:

• Beneficial owner of Sunrun (RUN) Tiger Global sold 1,250,000 shares of company stock at $79.77 per share for a total transaction of $99,712,375

• Beneficial owner of Michaels (MIK) Blackstone Management sold 10,000,000 shares of company stock at $10.02 per share for a total transaction of $100,200,000

• Beneficial owner of Bloom Energy (BE) Canada Pension Plan sold 9,206,695 shares of company stock at $15.90 per share for a total transaction of $146,386,451

• Beneficial owner of Sunnova Energy (NOVA) ECP ControlCo sold 5,000,000 shares of company stock at $28.00 per share for a total transaction of $140,000,000

• Chairman of Corsair Gaming (CRSR) George Majoros sold 1,135,375 shares of company stock at $17.00 per share for a total transaction of $19,301,375.

NOTABLE PRICE MOVEMENT AFTER INSIDER TRANSACTION: Shares of Element Solutions are up approximately 6% since Chairman Martin Franklin purchased shares, while shares of Sunrun are down approximately 15% since beneficial owner Tiger Global sold shares.