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 June 17 through June 21 include:

• Director of Seres Therapeutics (MCRB) Noubar Boghos Afeyan purchased 8,888,888 shares of company stock at $2.25 per share for a total transaction value of $19,999,998

• Chairman of Prospect Capital (PSEC) John Barry purchased 233,482 shares of company stock at $6.32 per share for a total transaction value of $1,474,439; John Barry also purchased 137,839 shares of company stock at $6.34 per share for a total transaction value of $874,492

• Chairman of Scientific Games (SGMS) Ronald Perelman purchased 120,000 shares of company stock at $20.29 per share for a total transaction value of $2,434,800; Ronald Perelman also purchased 110,000 shares of company stock at $19.73 per share for a total transaction value of $2,170,300

• Chairman of First Citizens BancShares (FCNCA) Frank Holding purchased 6,293 shares of company stock at $375.00 per share for a total transaction value of $2,359,875

• CEO of PBF Energy (PBF) Thomas Nimbley purchased 40,000 shares of company stock at $23.76 per share for a total transaction value of $950,400

• Chairman of G-III Apparel Group (GIII) Morris Goldfarb purchased 40,479 shares of company stock at $25.39 per share for a total transaction value of $1,027,762

NOTABLE INSIDER SALES: Significant insider sales reported in the prior week from June 17 through June 21 include:

• Director of Tiffany (TIF) Francesco Trapani sold 250,000 shares of company stock at $92.10 per share for a total transaction value of $23,025,375

• NVIDIA (NVDA) director Harvey Jones sold 100,000 shares of company stock at $145.10 per share for a total transaction value of $14,509,920
• Chairman of Zayo Group (ZAYO) Daniel Caruso sold 432,200 shares of company stock at 32.65 per share for a total transaction value of $14,111,330

• Director of Berkley (WRB) Mark Ellwood Brockbank sold 77,000 shares of company stock at $66.61 per share for a total transaction value of $5,128,662

• VP of Zebra Technologies (ZBRA) Bill Burns sold 5,000 shares of company stock at $201.05 per share for a total transaction value of $1,005,250

• Chairman of Inter Parfums (IPAR) sold 20,884 shares of company stock at $67.45 per share for a total transaction value of $1,408,657

NOTABLE PRICE MOVEMENT AFTER INSIDER TRANSACTIONS: Shares of Seres Therapeutics are up approximately 11% after director Noubar Boghos Afeyan purchased shares, while shares of Tiffany are down approximately 4% since Francesco Trapani sold shares.