Harmonic CFO Walter Jankovic's Stock Transactions and RSU Settlement

This Form 4 filing discloses stock transactions by Walter Jankovic, Chief Financial Officer of Harmonic Inc. On May 22, 2026, Jankovic received 6,645 shares of common stock through the settlement of restricted stock units (RSUs) that had a grant date of May 22, 2024 and expired on May 22, 2026. These RSUs were settled at $0 per share, representing the conversion of equity compensation. On the same day, Jankovic also sold 3,335 shares of common stock at $15.20 per share. Following these transactions, his total holdings decreased to 155,535 shares of Harmonic common stock. The filing represents routine executive compensation activity involving the vesting and conversion of equity awards, along with a subsequent stock sale.