AI Optical Beneficiaries Surge Over 6 Trillion Won in Market Cap in Just One Day

Lumentum Holdings Inc. (NASDAQ: LITE), an optics and photonics company, surged 8.69% on the Nasdaq, closing at $706 per share—about KRW 950,000. Trading volume reached approximately 7.14 million shares, and its market capitalization climbed to roughly $50.4 billion (around KRW 68 trillion), adding about $4.8 billion (KRW 6.5 trillion) in a single day.

With its inclusion in the S&P 500 index set for the 23rd, Lumentum is drawing heightened demand ahead of the rebalancing. Earlier this month, it struck a deal with Nvidia for next-generation AI infrastructure optical solutions that includes a $2 billion investment and multibillion-dollar long-term purchase commitments—positioning the company as a key beneficiary of AI infrastructure growth.

Headquartered in Silicon Valley, Lumentum supplies photonics solutions—such as lasers and optical modules—for data centers and telecom networks, and is poised for strong growth amid rising AI and cloud traffic. Its recent promotion from the S&P MidCap 400 to the S&P 500 cements its status among leading U.S. large-cap stocks, further attracting global institutional investors’ attention.