On August 28, Lumentum fell 3.43% in regular trading, trading at $923.97/share, with turnover of $175 million.

On the news front, executive Vincent Retort sold 26,274 shares of common stock on August 25, while SVP and General Counsel Kim Jae sold 7,219 shares on the same day at average prices between $842 and $860, both pursuant to pre-established Rule 10b5-1 trading plans. The concentrated insider selling raised market concerns over management's valuation outlook.

Additionally, the optical communication sector experienced broad profit-taking after rallying for several consecutive sessions on NVIDIA earnings catalysts. Peers Applied Optoelectronics fell 3.58%, Arista Networks fell 1.84%, and Nokia fell 1.23%, reflecting broad sector pressure. Lumentum had previously reported fiscal Q4 revenue of $10.3 billion, up 109% year-over-year, with next-quarter guidance well above consensus, and multiple investment banks maintained or raised target prices ranging from $1,000 to $1,380.

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