Lumentum to Join the S&P 500 Index

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s&p 500 financial

The S&P 500 is a broad stock market index that tracks the performance of 500 large U.S. companies, weighted so bigger firms have a larger impact. Investors use it like a thermometer or benchmark to judge how the overall U.S. stock market or a portfolio is doing; movements in the index influence investor sentiment, fund performance, and many passive investment products that aim to match its returns.

s&p midcap 400 financial

The S&P MidCap 400 is a group of 400 companies that are smaller than the big, well-known corporations but larger than tiny startups. It helps investors see how medium-sized companies are performing in the stock market, acting like a barometer for this middle-sized group of businesses.

03/10/2026 - 08:00 AM

SAN JOSE, Calif.--(BUSINESS WIRE)-- Lumentum Holdings Inc. (“Lumentum”), a global leader in optical and photonic solutions, today announced that it has been selected to join the prestigious S&P 500 index. According to S&P Dow Jones Indices, Lumentum will be added to the benchmark index before the market opens on Monday, March 23, 2026. This transition marks a significant milestone for the company as it moves from the S&P MidCap 400 to the S&P 500, reflecting its substantial growth and corresponding increase in market capitalization.

“Inclusion in the S&P 500 is a monumental achievement for our company and a credit to our global workforce,” said Michael Hurlston, President and CEO. “It reflects our vital role in helping customers build next-generation AI infrastructure. By deepening our strategic partnerships and increasing capacity for advanced photonics, we continue to deliver long-term value to both our customers and shareholders.”

The promotion of a company from the S&P MidCap 400 to the S&P 500 is a widely recognized hallmark of corporate maturity and financial health. Beyond providing increased liquidity and market visibility, inclusion in the S&P 500 places Lumentum among the 500 leading companies in the United States.

About Lumentum

Lumentum (NASDAQ: LITE) is a global leader in optical and photonic technologies that power the networks and infrastructure behind AI, cloud computing, and next-generation communications. Built on decades of photonics innovation, Lumentum delivers high-performance lasers, modules, and optical subsystems that enable scalable, energy-efficient data center connectivity, advanced telecom networks, industrial manufacturing, and sensing applications. Headquartered in San Jose, California, the company operates R&D, manufacturing, and sales facilities worldwide. Learn more at www.lumentum.com.

Category: Financial