Shares of Coherent Corp experienced a significant uptick on Tuesday, rising close to 6%, after the company confirmed it will be added to the S&P 500 index effective March 23. This development extends a substantial rally that began earlier this month when Nvidia disclosed a $2 billion investment in the photonics specialist. By late morning trading in New York, the stock was changing hands at $267.79, adding to a 7.04% gain recorded the previous day.
Index Inclusion Drives Institutional Demand
The timing of the index addition is strategically significant for Coherent. With trillions of dollars in assets benchmarked to the S&P 500 through index funds and exchange-traded funds (ETFs), the reshuffle typically triggers substantial index-driven buying activity. This process effectively broadens the company's investor base by mandating purchases from passive funds that track the benchmark. Notably, Lumentum and Vertiv, two other companies focused on artificial intelligence infrastructure that are also joining the index this month, saw their shares rise in tandem on Tuesday.
Photonics at the Heart of the AI Rally
Coherent's recent surge is fundamentally tied to its leadership in photonics technology. This field involves using light, rather than electricity, to move data between chips and computing systems, a capability increasingly critical for advanced AI workloads. Nvidia solidified its commitment to this technology on March 2 with a $2 billion investment in Coherent. The deal secures Nvidia both supply commitments and early access to Coherent's next-generation laser and optical networking equipment as the latter ramps up its U.S. production capacity. Nvidia Chief Executive Jensen Huang characterized the partnership as an effort to deliver AI infrastructure at "unprecedented scale, speed and energy efficiency." The competitive landscape is heating up, with Marvell Technology also making deeper moves into photonics through its collaboration with Celestial AI.
Management Celebrates Milestone
Coherent CEO Jim Anderson described the S&P 500 inclusion on Monday as "a testament to the strength of our team." The Saxonburg, Pennsylvania-based company stated that its formal addition to the prominent stock index will occur before the market opens on March 23.
New Product Launch Ahead of Key Conference
In a related move, Coherent introduced its latest 980-nanometer micro-pump lasers on Monday. These components are engineered for optical amplifiers, which boost the strength of light signals traveling across data networks. According to Madhu Krishnaswamy, Senior Vice President at Coherent, these new lasers allow customers to achieve density and performance levels that were "previously unattainable" in such compact form factors.
The product announcement is strategically aligned with the upcoming OFC telecommunications conference in Los Angeles. Coherent has scheduled a technology briefing for the event on March 17, where CEO Jim Anderson, Chief Technology Officer Julie Eng, and several other senior executives are expected to present.
Financial Performance and Outlook
The company's financial trajectory supports the positive market sentiment. In February, Coherent reported fiscal second-quarter revenue of $1.69 billion, representing a 17% increase compared to the same period last year. Management attributed this growth to robust demand from datacenter and communications markets, a trend they expect to continue through the second half of fiscal 2026. For the current third quarter, the company provided revenue guidance in the range of $1.70 billion to $1.84 billion.
Notable Risks Remain
Despite the optimistic developments, Coherent has outlined several risks. In a March 2 regulatory filing related to the Nvidia agreement, the company cautioned that the underlying assumptions of the deal might not materialize as expected. It also noted that any modifications to the purchase agreement or related partnerships could materially impact financial results. Furthermore, while the S&P 500 inclusion is a catalyst, it does not become official until March 23. Some of the recent buying pressure may subside after index-tracking funds complete their mandatory rebalancing purchases, leading to potential volatility.
