Lumentum shares tumble despite strong print and guide

Lumentum reported fiscal third-quarter results that topped expectations and raised its outlook for the next quarter, but the stock still fell in after-hours trading.

The company said net revenue for the quarter was $808.4 million and non-GAAP diluted earnings per share were $2.37. It also said gross margin improved as it continued to benefit from demand tied to AI infrastructure.

For fiscal fourth quarter, Lumentum guided revenue to $960 million to $1.01 billion and non-GAAP EPS to $2.85 to $3.05. Reuters reported that the revenue outlook was above Wall Street expectations.

Despite the beat and the raised guide, coverage pointed to investor concerns about debt and whether the margin improvement can last. That helped send the shares lower after hours on May 5.

The results leave Lumentum in the familiar earnings story arc: a strong top- and bottom-line print, but a market that is still looking for proof that the improvement is durable.

The immediate question is whether the stock's decline persists into the next session or fades once investors focus on the upgraded outlook.