BURU vs COHR: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. BURU and COHR share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined BURU and COHR exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Nuburu was founded in 2015 around a differentiated industrial laser technology: high-power blue lasers, which the company argued could weld reflective metals like copper and aluminum more cleanly than conventional infrared lasers, with applications in electric-vehicle batteries and electronics. It went public in early 2023 through a merger with the special-purpose acquisition company Tailwind Acquisition Corp. The laser business never reached commercial scale, and by 2025 revenue had collapsed to near zero. In response, management launched a sweeping strategic pivot in early 2025, creating a Defense and Security business unit (including Nuburu Defense LLC) and pursuing a roll-up of defense-tech assets, while also trying to revive the core laser line through a planned European acquisition (Lyocon).

Full BURU guide

Coherent Corp, formerly II-VI and now trading as COHR on the NYSE, makes lasers, optical components, and high-speed transceivers used in AI data centers, telecom networks, industrial manufacturing, and semiconductors. Its largest and fastest-growing segment is Datacenter & Communications, which supplies the 800G and emerging 1.6T optical transceivers that connect GPUs and switches inside AI clusters, alongside a smaller Industrial segment covering lasers and materials.

Full COHR guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• BURU drivers: Defense and security roll-up; Reviving the blue-laser core.
• COHR drivers: AI datacom transceiver demand; Transition to 1.6T optics.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The risks here are extreme and stacked. For COHR, cOHR trades at a high earnings multiple, so any slowdown in AI capital spending or a demand air pocket could hit the stock hard.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick BURU if you believe its drivers more; COHR if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the BURU and COHR guides.

BURU. Standard valuation tools do not work well on a pre-revenue, transforming micro-cap like this. There is almost no revenue to anchor a multiple, losses are large relative to the company's size, and the share count has changed dramatically through both dilution and a reverse split, so historical per-share figures are not comparable over time. With negative stockholders' equity and a going-concern qualification, the equity's value depends entirely on whether the company can raise more capital, close its acquisitions, and eventually generate real revenue. Any figure here can change quickly with the next financing or corporate action.

COHR. Coherent's revenue has accelerated on AI datacenter optics demand, with the Datacenter & Communications segment making up about three quarters of sales. The stock carries a high trailing multiple that reflects rapid earnings growth expectations, so the valuation depends heavily on that growth continuing. Figures are approximate and shift with each quarterly report and market moves.

Headline figures (approximate, latest available 2025 results and early-2026 corporate actions): BURU shows revenue (recent quarter) Approximately $49,000 in Q2 2025 (effectively pre-revenue), net loss (recent quarter) Approximately $12 million in Q2 2025, cash Roughly $6 million after a $12 million raise, supplemented by additional financing agreements, stockholders' equity Negative (a reported deficit of about $37.8 million at year-end 2024); COHR shows revenue (ttm) ~$6.3B, q3 fy2026 revenue ~$1.81B (up ~21% YoY), q3 fy2026 non-gaap eps ~$1.41, q4 fy2026 revenue guidance ~$1.91B to $2.05B.

BURU and COHR are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined BURU and COHR exposure against your real portfolio. It is not an investment adviser.