Exhibit 99.1 VIAVI Announces Third Quarter Fiscal 2026 Results Chandler, Arizona, April 29, 2026 — VIAVI (NASDAQ: VIAV) today reported results for its fiscal third quarter ended March 28, 2026 with the following highlights. Third Quarter "VIAVI's financial performance for the third quarter has exceeded our expectations, driven by strong growth in the data center and aerospace and defense end markets. We expect these end markets to continue to be strong drivers for the foreseeable future," said Oleg Khaykin, ...