MDT vs MMSI: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of September 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.

Reading it: MDT 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.

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. MDT and MMSI 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 MDT and MMSI 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.

Medtronic is one of the largest medical device companies in the world, designing, manufacturing, and selling therapies and devices across a broad range of chronic and acute conditions. Its business spans four main areas: Cardiovascular (pacemakers, defibrillators, heart valves, and cardiac ablation), Neuroscience (spine implants, neuromodulation for pain and movement disorders, and surgical navigation), Medical Surgical (surgical stapling, energy devices, and a growing robotic-surgery platform), and Diabetes (insulin pumps and continuous glucose monitoring). The company sells primarily to hospitals, surgeons, and health systems, generating durable, recurring demand tied to procedure volumes and chronic-disease management. Medtronic's scale gives it deep relationships with providers, a large installed base of devices, and the resources to fund extensive R&D and acquisitions. Growth depends on new product cycles, pipeline approvals, and global expansion, especially in emerging markets. Founded in 1949 and headquartered in Ireland for tax purposes (operationally rooted in Minnesota), Medtronic is a large-cap, dividend-growing medical-technology company tied to long-term healthcare demand and aging demographics.

Full MDT guide

Merit Medical Systems designs, manufactures, and markets a broad catalog of single-use and capital medical devices used in minimally invasive procedures. Its business splits into two segments: Cardiovascular (peripheral intervention, cardiac intervention, interventional oncology and spine, and cardiovascular and critical care) and Endoscopy (non-vascular stents, balloon dilators, and related tools for gastroenterologists and pulmonologists). The company sells globally through direct sales forces and distributors, and it has grown revenue toward roughly $1.5 to $1.6 billion annually, driven by a mix of organic volume and frequent product-line acquisitions.

Full MMSI guide

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

• MDT drivers: Diversified device portfolio; Innovation pipeline and new product cycles.
• MMSI drivers: Organic growth in interventional devices; Bolt-on acquisitions.

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: Medtronic has at times delivered sluggish organic growth, raising concerns that its scale slows innovation relative to nimbler competitors like Boston Scientific and Edwards Lifesciences. For MMSI, merit competes against far larger and better-capitalized device companies including Boston Scientific, Medtronic, Abbott, Teleflex, Becton Dickinson, and Terumo, which can pressure pricing and share.

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 MDT if you believe its drivers more; MMSI 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 MDT and MMSI guides.

MDT. Medtronic trades at a moderate valuation relative to faster-growing medtech peers, reflecting its scale, diversification, and reliable dividend but also a track record of slower organic growth. The multiple has expanded when new product cycles reaccelerated growth and compressed during periods of execution stumbles. The yield gives it a defensive, income-oriented profile within healthcare.

MMSI. Merit trades around a mid-20s to high-20s P/E on trailing GAAP earnings, a premium that reflects its consistency and acquisition-driven model. Q1 2026 revenue of about $382 million rose 7 percent year over year, with non-GAAP EPS of $0.94 beating expectations. Full-year 2026 guidance implies roughly 6 to 8 percent revenue growth and mid-to-high single-digit non-GAAP EPS growth.

Headline figures (approximate, early 2026): MDT shows revenue (ttm) ~$33 billion, operating margin ~20% (non-GAAP higher; GAAP affected by amortization), net income (ttm) ~$4.5 billion, eps (ttm) ~$3.50 GAAP; non-GAAP higher; MMSI shows revenue (ttm) ~$1.54B, market cap ~$4.0B, net income (ttm) ~$139M, p/e (gaap, ttm) ~27x.

MDT and MMSI 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 MDT and MMSI exposure against your real portfolio. It is not an investment adviser.