MRVL vs MTSI: 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.

Reading it: MRVL 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. MRVL and MTSI 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 MRVL and MTSI 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.

Marvell Technology designs semiconductors for data infrastructure: networking silicon (Ethernet, optical, switching), storage controllers, custom silicon (ASICs) for hyperscalers, and 5G wireless infrastructure. The company has positioned itself as the second-largest designer of custom AI silicon for hyperscaler customers, behind Broadcom. Marvell's custom silicon revenue from Amazon (Trainium), Microsoft (Azure custom chips), and Meta has grown rapidly through 2024-2025.

Full MRVL guide

MACOM designs and manufactures high performance semiconductors for three end markets: Industrial and Defense, Data Center, and Telecom. Headquartered in Lowell, Massachusetts, with more than 70 years of application history behind it, the company builds RF, microwave, analog, mixed signal and optical components, and it runs its own compound semiconductor fabrication for gallium arsenide, gallium nitride, indium phosphide and specialized silicon. Products range from integrated circuits and multi chip modules to diodes, amplifiers, switches and optical subsystems, sold to more than 6,000 end customers who put them inside radar systems, satellite links, wireless basestations, optical transport gear and data center networks. In the quarter ended July 3, 2026, Industrial and Defense contributed ~$133.4 million, Data Center ~$137.6 million and Telecom ~$71.3 million.

Full MTSI guide

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

• MRVL drivers: Custom AI silicon (ASICs) for hyperscalers; Optical interconnects for AI data centers.
• MTSI drivers: Data center optical became the largest segment; Margin expansion on owned fabrication.

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: Customer concentration in custom AI silicon (a few hyperscalers dominate revenue). For MTSI, valuation is the first thing to weigh: at roughly 21.5 times trailing sales and about 104 times trailing GAAP earnings after a year in which market value rose roughly 167%, a single quarter of decelerating data center orders could compress the multiple sharply.

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 MRVL if you believe its drivers more; MTSI 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 MRVL and MTSI guides.

MRVL. Marvell trades at a premium multiple reflecting the AI custom silicon growth story. The valuation depends on continued execution against the AI thesis; multiple compresses quickly if growth disappoints.

MTSI. The trailing price to earnings ratio of roughly 104 is flattered by a one time gain: fiscal third quarter GAAP net income of ~$100.7 million included ~$41.5 million of non cash investment fair value gain, versus adjusted net income of ~$109.8 million, or ~$1.40 per diluted share. Guidance for the fiscal fourth quarter of ~$415 million to ~$425 million in revenue and ~$1.97 to ~$2.03 in adjusted diluted earnings per share would put the forward multiple far below the trailing one, which is precisely what the current price is discounting. The balance sheet held ~$89.6 million of cash plus ~$573.4 million of short term investments as of July 3, 2026, against ~$340 million of convertible notes now classified as current.

Headline figures (approximate, early 2026): MRVL shows revenue (ttm) ~$6 billion, operating margin ~25% (improving as custom silicon mix grows), net income (ttm) ~$1 billion, eps (ttm) ~$1.30; MTSI shows revenue (ttm) ~$1.16B, q3 fy2026 revenue ~$342.2M, up ~36% year over year, adjusted gross margin (q3 fy2026) ~59.7%, diluted eps (ttm, gaap) ~$3.14.

MRVL and MTSI 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 MRVL and MTSI exposure against your real portfolio. It is not an investment adviser.