Lumentum Holdings is set to join the Nasdaq-100 index on May 18, taking the place of CoStar Group. This move marks the company's second major index inclusion in just two months, following its addition to the S&P 500 in March. The Nasdaq-100 comprises the 100 largest non-financial companies listed on the Nasdaq exchange, and its rebalancing can trigger significant buying from index-tracking funds.
In early trading Monday, Lumentum shares were indicated at $903.80, giving the company a market capitalization of approximately $86.9 billion. This valuation comes after a stunning 145% gain year-to-date, which ranks it sixth among S&P 500 performers, according to MarketWatch. The rally builds on a 339% surge in 2025.
The company's optical and photonic technologies, which enable high-speed data transmission for networks and data centers, have become critical components of AI infrastructure. CEO Michael Hurlston noted that the Nasdaq-100 inclusion underscores the essential role of Lumentum's hardware in powering AI workloads, as data centers demand ever-greater bandwidth and faster connections.
Lumentum's financial performance reflects this AI-driven demand. For its fiscal third quarter, revenue soared 90.1% year-over-year to $808.4 million, with GAAP net income reaching $144.2 million. The company forecasts fourth-quarter revenue between $960 million and $1.01 billion, with non-GAAP operating margins projected at 35% to 36%.
Wall Street has responded with upgraded price targets. J.P. Morgan set a target of $1,130, Rosenblatt at $1,300, while Morgan Stanley maintained $900 but cautioned about potential near-term digestion following the sharp rally. Analysts Meta Marshall and Antonio Jaramillo told Barron's that pricing power remains intact despite the rapid advance.
Nvidia's recent strategic investment of $2 billion in Lumentum, along with multibillion-dollar purchase commitments and rights to future laser components, has further boosted the company's profile. This aligns with Nvidia's similar stake in rival Coherent, highlighting the critical nature of optical components in AI systems.
Despite the optimism, risks remain. Lumentum's price-to-earnings ratio stands at approximately 145.8, far above the sector average of 37, according to Simply Wall St. The firm also flagged insider selling and volatility as potential red flags. Operationally, Hurlston acknowledged that the company is "significantly undershipping demand," suggesting supply constraints could limit near-term revenue until capacity expands.
The May 18 rebalance will bring Lumentum to a broader institutional investor base, as the Nasdaq-100 guides over 200 investment products with more than $600 billion in total assets. However, the company must still prove it can meet its June-quarter guidance. If margins slip, supply issues persist, or AI data-center demand disappoints, index fund buying may not provide a safety net.
