Exhibit 99.1 FOR IMMEDIATE RELEASE Harmonic Announces Third Quarter 2025 Results Both Broadband and Video exceeded expectations on revenue and profitability SAN JOSE, California, November 3, 2025 - Harmonic Inc. (NASDAQ: HLIT) today announced its unaudited results for the third quarter of 2025. "Our third quarter results exceeded our expectations on revenue and profitability for both Broadband and Video," said Nimrod Ben- Natan, president and chief executive officer of Harmonic. "We saw stronger momentum in ...