LHX vs OPTT: 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. LHX and OPTT 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 LHX and OPTT 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.

L3Harris Technologies is a major US defense and aerospace contractor formed by the 2019 merger of L3 Technologies and Harris Corporation. It positions itself as an agile defense-technology company spanning communications, sensors, electronic warfare, space, intelligence, and missile systems. The business is organized into segments covering Space and Airborne Systems (avionics, sensors, electronic warfare, space payloads), Integrated Mission Systems (ISR, maritime, electro-optical), Communication Systems (tactical radios, secure communications), and, following its acquisition of Aerojet Rocketdyne, a propulsion segment that makes rocket motors and missile propulsion for the US military and space programs. L3Harris primarily sells to the US Department of Defense, allied governments, and intelligence agencies under long-term contracts, which gives it durable, often multi-year revenue backed by defense budgets. It makes money by designing, building, and supporting mission-critical hardware and software, then earning long-tail revenue from sustainment, upgrades, and spare parts. The company also pursues cost-savings programs to expand margins after its large merger and acquisitions. Headquartered in Melbourne, Florida.

Full LHX guide

Ocean Power Technologies designs and sells intelligent maritime products and services. Its PowerBuoy platforms generate clean electric power and provide real-time data and communications for remote ocean and subsea applications, acting as persistent floating infrastructure where running a cable or sending a crewed vessel is impractical. Its WAM-V autonomous surface vessels are uncrewed marine robots used for survey, research, and surveillance, and its Merrows platform layers AI-driven maritime domain awareness across these and third-party assets so a customer can monitor a stretch of ocean continuously. The combined pitch is unmanned, always-on eyes and power at sea for defense, homeland security, offshore energy, and research buyers.

Full OPTT guide

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

• LHX drivers: Rising global defense spending; Diversified mission-critical portfolio.
• OPTT drivers: Defense and homeland-security pivot; Backlog and pipeline growth.

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: L3Harris depends heavily on US government and allied defense budgets, so spending cuts, continuing resolutions, government shutdowns, or shifting priorities directly threaten revenue. For OPTT, the central risk is that revenue is tiny relative to the company's valuation and ongoing cash needs: fiscal 2025 revenue was around $5.9 million against a net loss near $21.5 million, and quarterly revenue can drop to a few hundred thousand dollars.

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 LHX if you believe its drivers more; OPTT 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 LHX and OPTT guides.

LHX. L3Harris trades at a defense-sector multiple supported by a large multi-year backlog, predictable government revenue, and steady free cash flow. The valuation reflects the durability of defense spending and the company's margin-expansion and capital-return story, offset by debt from acquisitions and program-execution risk. Defense names like L3Harris are often valued on backlog visibility and free cash flow as much as headline earnings.

OPTT. A pre-scale ocean and defense-tech micro-cap like OPTT cannot be valued on earnings because there are none; it loses money on small, lumpy revenue. The numbers that matter are order backlog and pipeline (demand not yet booked), cash runway versus burn rate, and the pace of share dilution, because the company funds itself by issuing stock. The market cap embeds a theme premium for autonomous maritime and defense exposure rather than current results, so the stock can trade far above what the financials alone would justify and can re-rate sharply, up or down, on a single contract announcement or capital raise.

Headline figures (approximate, early 2026): LHX shows revenue (ttm) ~$21 billion, operating margin ~15%, net income (ttm) ~$1.5-2 billion, p/e (ttm) ~20x; OPTT shows revenue (fy2025) ~$5.9 million, net loss (fy2025) ~$21.5 million, backlog ~$15 million (FY2026), cash + short-term investments ~$11.7 million (Oct 31, 2025).

LHX and OPTT 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 LHX and OPTT exposure against your real portfolio. It is not an investment adviser.