New York, Jan 19, 2026, 19:57 EST — Market closed
- Coherent’s shares dipped about 2.5% on Friday, ahead of the U.S. market holiday.
- The company rolled out “bondable diamond” components aimed at improving thermal management in chip and opto-electronic cooling.
- Traders return Tuesday, coinciding with the kickoff of Photonics West in San Francisco.
Coherent Corp’s shares ended Friday at $191.04, dropping about 2.5%. The photonics supplier will likely draw renewed focus as U.S. markets resume after the Martin Luther King Jr. Day holiday, driven by its rollout of a new thermal-management product line. 1
The pitch is losing steam. With chips running hotter in data centers, power electronics, and laser systems, investors are zeroing in on suppliers that can effectively pull heat away from the die. It might sound like a materials science lesson, but the market is listening.
U.S. stock markets stayed closed Monday for the holiday and will reopen Tuesday. 2
Early Monday, the broader market showed signs of weakness. European tech shares slipped, and Nasdaq 100 futures dropped after U.S. President Donald Trump issued tariff threats, unsettling risk appetite, Reuters reported. 3
Coherent has launched its new “Bondable Diamond” solutions, which bond directly to semiconductor die and eliminate the need for thermal interface materials—those thin layers that usually impede heat transfer between chips and heat spreaders. The company claims this approach can reduce interface thermal resistance by as much as 99%. It accommodates die sizes up to 100 mm square. Senior Vice President Steve Rummel called the product a “breakthrough thermal performance” solution crafted to align with customer manufacturing processes. 4
The stock experienced a volatile session. Coherent opened at $197, surged to a high of $201.93, then slipped to a low of $189.59, finishing the day at $191.04. Roughly 3.59 million shares changed hands, according to Yahoo Finance historical data. 5
Wall Street is zeroing in on the “AI infrastructure” segment of the optical supply chain, with Coherent right in the mix. Last week, Barclays’ Tom O’Malley bumped up his price target for Coherent to $215 from $170, keeping an Overweight rating intact. He noted that the stock’s 2026 trajectory will hinge heavily on its connection to the AI trend. 6
Earnings are the immediate spotlight. Coherent’s latest quarterly report forecasts second-quarter fiscal 2026 revenue between $1.56 billion and $1.70 billion, with non-GAAP gross margins expected to land between 38% and 40%. 7
Cooling hardware is still a heated battleground. Element Six, for instance, markets metallised CVD diamond products tailored for die bonding, focusing on thermal management. 8
New product launches rarely lead to immediate sales. Qualification processes can take time, and any issues with cost, yield, or supply may push customers to explore alternative materials or packaging options.
Traders will watch Tuesday’s open for signs of momentum in Coherent after the long weekend and to assess risk appetite. The Photonics West show, set for Jan. 20-22 in San Francisco, will highlight Coherent’s latest thermal-management products. 9
