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

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Investors: Kathy Ta, +1.408.750.3853; investor.relations@lumentum.com

Media: Victoria McDonald, +1.408.404.0636; media@lumentum.com

Lumentum to Join the S&P 500 Index