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 19 through October 23 include:

• Beneficial owner of Selecta Biosciences (SELB) Timothy Springer purchased 3,644,692 shares of company stock at $2.62 per share for a total transaction value of $9,555,653

• Chairman of Golub Capital (GBDC)Lawrence Golub purchased 10,000 shares of company stock at $13.21 per share for a total transaction value of $132,075

•  Director of Del Taco Restaurants (TACO) Ari Levy purchased 67,400 shares of company stock at $7.49 per share for a total transaction value of $504,516

• Director of Datto Holding (MSP) purchased 15,000 shares of company stock at $27.00 per share for a total transaction value of $405,000

• Beneficial owner of Sound Financial Bancorp (SFBC) Joseph Stilwell purchased 5,000 shares of company stock at $29.82 per share for a total transaction value of $149,097.

NOTABLE INSIDER SALES: Significant insider sales in the prior week from October 19 through October 23 include:

• Officer of Datadog (DDOG) Amit Agarwal sold 371,634 shares of company stock at $103.88 per share for a total transaction value of $38,605,191

• Chairman and co-CEO of Netflix (NFLX) Reed Hastings sold 177,681 shares of company stock at $527.86 per share for a total transaction value of $93,790,675

• VP of Quest Diagnostics (DGX) sold 10,450 shares of company stock at $125.00 per share for a total transaction value of $1,306,250

• VP of Nvidia (NVDA) Debora Shoquist sold 35,340 shares of company stock at $549.04 per share for a total transaction value of $19,403,067

• Beneficial owner of Schrodinger (SDGR) David Shaw sold 474,453 hares of company stock at $56.63 per share for a total transaction value of $26,870,124

NOTABLE PRICE MOVEMENT AFTER INSIDER TRANSACTION: Shares of Selecta moved up over 40% after beneficial owner Timothy Springer purchases shares, while shares of Netflix moved down over 7% after CEO Reed Hastings sold shares.