COHR vs LASR: Which Is the Better Buy in 2026?
Last updated August 2026
Short answer
COHR is the larger of the two ($51.43B market cap): the incumbent the market prices for continued execution (31.71x forward earnings, beta 2.04). LASR is the smaller challenger ($3.88B), actually pricier on forward earnings (101.84x): more room to run, but more to prove. The real question is which set of drivers you believe, and whether owning one (or both) leaves you over-concentrated.
COHR vs LASR: the tie-breaker metrics
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.
| Metric | COHR | LASR | What it tells you |
|---|---|---|---|
| Market cap | $51.43B | $3.88B | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | 31.71 | 101.84 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Beta | 2.04 | 2.30 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 50% of range | 73% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 4.81 | 9.04 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Reading it: COHR is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.
Before you buy: how COHR and LASR affect your concentration
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. COHR and LASR 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 COHR and LASR 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.
What does Coherent Corp (COHR) do?
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.
What does nLIGHT (LASR) do?
nLIGHT, Inc. (Nasdaq: LASR) designs and manufactures high-power semiconductor and fiber lasers for three broad markets: aerospace and defense (directed-energy weapons, optical sensing), advanced manufacturing (industrial cutting, welding, additive), and microfabrication. Historically the company leaned on commercial industrial-laser sales, a competitive and cyclical business, but the growth engine has decisively shifted to defense, where nLIGHT supplies high-energy laser systems and beam-control technology to US Army and Navy programs. The company is based in Vancouver, Washington and books a large share of revenue from US government and prime-contractor programs.
COHR vs LASR: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- COHR drivers: AI datacom transceiver demand; Transition to 1.6T optics.
- LASR drivers: Directed-energy defense demand; Product scaling and new platforms.
Which fits which kind of investor
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: COHR trades at a high earnings multiple, so any slowdown in AI capital spending or a demand air pocket could hit the stock hard. For LASR, valuation is the dominant risk: at a price-to-sales multiple many times the hardware-industry average, the stock is priced for sustained rapid growth, so any deceleration in defense orders could compress the multiple sharply.
COHR or LASR: which should you pick?
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 COHR if you believe its drivers more; LASR 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 COHR and LASR guides.
COHR vs LASR: the full fundamentals
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.
LASR. As of May 2026, nLIGHT is priced as a defense-growth story: a modest revenue base of roughly ~$290 million trailing supports a market cap near ~$3.6 billion, a price-to-sales multiple many times typical laser-hardware peers. The company turned a small quarterly profit in Q1 2026 after a full-year 2025 net loss, so the premium rests on expectations of continued directed-energy revenue growth rather than current earnings.
Headline figures (approximate, July 2026): 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; LASR shows revenue (ttm) ~$290M, fy2025 revenue ~$261M (up ~32%), q1 2026 revenue ~$80M (up ~55% YoY), market cap ~$3.6B.
The bottom line: COHR vs LASR
COHR and LASR 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 COHR and LASR exposure against your real portfolio. It is not an investment adviser.
Wondering how COHR or LASR fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in Coherent Corp with AI
Connect the broker you already use and ask Walnut's AI how COHR fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between COHR and LASR?
+
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. nLIGHT, Inc. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is COHR or LASR the better stock?
+
Neither is universally better. COHR is the larger incumbent; LASR is the smaller challenger and looks pricier on forward earnings. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, COHR or LASR?
+
On forward P/E (as of August 2026), COHR trades at 31.71x and LASR at 101.84x, so COHR is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both COHR and LASR?
+
Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of COHR vs LASR?
+
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. Revenue is concentrated among a small number of hyperscaler and networking customers, which creates order-timing and pricing risk. The optical components industry is cyclical and competitive, with pricing pressure from Chinese module makers and component rivals. The Industrial segment has been soft, and the company remains sensitive to macro conditions and semiconductor capital cycles. Execution on the 1.6T ramp and capacity expansion is not guaranteed. LASR: Valuation is the dominant risk: at a price-to-sales multiple many times the hardware-industry average, the stock is priced for sustained rapid growth, so any deceleration in defense orders could compress the multiple sharply. Revenue is concentrated in US government and directed-energy programs, which are exposed to federal budget cycles, procurement timing, and program cancellations. The legacy commercial-laser segment faces intense competition and pricing pressure from larger players. Profitability is thin and recent, so a return to losses is possible if mix or volumes weaken, and the February 2026 equity raise diluted shareholders. Lumpy defense revenue recognition can also make quarterly results volatile.
Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell COHR or LASR; figures are approximate and dated (as of August 2026). Verify current data before investing.