COHERENT CORP. (COHR) stock intrinsic value fair value estimate & owner earnings analysis

Coherent is a photonics manufacturer whose largest business supplies the lasers, optical transceivers and switching hardware that connect AI data centers, with a smaller industrial laser and materials segment making up the rest. The ten-year record is the most important fact here. Revenue grew from roughly $0.8 billion to $7.1 billion over the decade, but nearly all of that came from acquisitions, chiefly the 2022 purchase of Coherent, Inc., which was funded with debt and preferred stock and roughly tripled the share count. Over those same ten years operating cash flow was consumed almost entirely by capital spending and stock compensation: cumulative owner earnings were slightly negative, and owner earnings per share exceeded a dollar in only one year. Fiscal 2026 was a genuine inflection, with revenue up 23% to $7.1 billion, gross margin improving to 37% from 31% two years earlier and net earnings of $787 million, but it was also the most cash-hungry year in the company's history: $1.1 billion of capital spending against $242 million of depreciation, plus a $1.2 billion inventory build, cut operating cash flow to $80 million. Because that spending is expansion rather than replacement, we value the company on what it could earn at normal replacement-level capital spending rather than on this year's reported cash flow, and on an enterprise basis that accounts for roughly $3.2 billion of borrowings against $2.0 billion of cash and short-term investments. The bear case assumes the AI optics cycle rolls over and earning power reverts to the average of the last three years with no growth thereafter, discounted at 12%; that is a fair benchmark because the company's worst recent stretch reflected an industry destocking and pricing cycle that recurs in ordinary times rather than a one-off economic shock. The base case assumes the current order book carries the business higher for a few years before component price erosion reasserts itself, roughly 5% annual growth in owner earnings at a 9.5% discount rate. The bull case assumes the shift from copper to optical connections inside data centers is durable and that higher-speed and optical-switching products sustain about 10% annual growth, discounted at 8.5%. The gap between the cases is unusually wide, more than tenfold, and that gap is itself the honest signal: optical components have a long history of demand booms followed by capacity gluts and steep price declines, and this management's record of converting growth into cash for shareholders is poor. We therefore anchor our buy price on the bear case rather than the base case and require roughly a 40% discount to it. We are perhaps three-quarters confident the bear case is a real floor -- the balance sheet is now healthy and borrowings are modest relative to earnings -- but a hard turn in the cycle could leave both the new capacity and the $2.6 billion of inventory worth far less than carried, and fixed lease obligations of about $316 million sit alongside the debt. Our buy price is deliberately far below where the shares are likely to trade; we would rather miss this entirely than pay for a peak that has not yet proven it can be repeated.