Form 4 Filing for Harmonic Inc.

Walter Jankovic, Chief Financial Officer of Harmonic Inc., reported transactions on September 11, 2026. He acquired 1457 shares of Common Stock through the vesting of Restricted Stock Units (RSUs) with a reported price of $0.00. Following this, he disposed of 732 shares of Common Stock at a price of $12.00 per share. Post-transaction, Jankovic holds 166,839 shares of Common Stock directly. The RSUs acquired are convertible into 1457 shares of common stock, with a post-transaction balance of 4371 RSUs. The reporting owner is Walter Jankovic, CIK 0001730628, with officer title Chief Financial Officer. The issuer is Harmonic Inc., trading symbol HLIT, CIK 0000851310.