MACOM Technology Solutions Holdings, Inc. (MTSI)

MACOM designs and makes chips and components that handle radio frequency, microwave, millimeter wave and optical signals: amplifiers, switches and limiters, diodes, lasers, photodetectors, modulator drivers and whole modules, thousands of standard and custom parts in dozens of product lines. Its more than 6,000 end customers build them into larger systems such as wireless base stations, optical networks, data center networks, radar, medical systems and satellite networks. It serves three markets: industrial and defense, data center, and telecom. 141516

How it operates

MACOM designs and makes chips and components that handle radio frequency, microwave, millimeter wave and optical signals: amplifiers, switches and limiters, diodes, lasers, photodetectors, modulator drivers and whole modules, thousands of standard and custom parts in dozens of product lines. Its more than 6,000 end customers build them into larger systems such as wireless base stations, optical networks, data center networks, radar, medical systems and satellite networks. It serves three markets: industrial and defense, data center, and telecom. 141516

It sells through its own sales force and application engineers and through independent representatives, resellers and distributors; distributors took 32.3% of fiscal 2025 revenue, up from 24.0% two years earlier. No direct customer reached a tenth of revenue, and the top 25 direct customers together took 45.6%, but two resellers did: one took 12.4%, the other 11.2%. The top ten customers of all kinds accounted for 57%. Sales are mostly on purchase orders rather than long-term commitments, and much ships from stock soon after an order, which the company calls turns business. 1718192021

MACOM calls its model fab-lite. It runs its own wafer fabs in Lowell, Massachusetts, where it is headquartered, in Research Triangle Park, North Carolina, in Ann Arbor, Michigan, and in Limeil-Brévannes, France, making chips from gallium arsenide, gallium nitride and indium phosphide, compound semiconductors prized in defense for high power density and broadband performance, and it buys other processes and extra capacity from outside foundries. Assembly and test run in Lowell, Nashua, Ann Arbor, Hamilton, Morgan Hill, Limeil-Brévannes and Hsinchu, Taiwan, with contract manufacturers doing some packaging and whole products. Some processes rest on a single foundry that supplies all of its wafers in that process. 22232425262728

By customer location, the United States brought in 422.9 million dollars, 43.7% of fiscal 2025 revenue, up 29.0%; China 274.6 million, 28.4%, up 54.5%; Asia Pacific 11.5%; and other countries 16.4%. The filing says customers in China and the Asia Pacific region typically make up a large portion of its sales outside the United States. 293031

Many of its products sell for five to ten years, some for more than 20. Revenue is recorded net of reserves for returns, price adjustments and stock rotations. Gross margin was 54.7% in fiscal 2025, up 70 basis points, and research and development took 25.3% of revenue. Its fiscal year has 52 or 53 weeks and ends near the end of September; fiscal 2025 had 53. 3233343536

The specifics

Its Lowell fab holds Trusted Foundry status from the US Department of Defense, a mark of process integrity and protection that matters because some defense customers require a domestic supply chain. Its engineers combine circuit design, process technology and packaging for high frequencies, high power, high data rates and rugged conditions. It holds 729 US and 497 foreign patents, with 166 US and 269 foreign applications pending, though it says its future depends more on its engineers and management than on patents. 3738394041

It names its rivals: Analog Devices, Broadcom, Credo, Marvell, MaxLinear, Microchip, NXP, Qorvo, Semtech, Skyworks and Sumitomo Electric Device Innovations, as well as its own customers' in-house design teams. Some competitors are also customers, and in some product categories it competes with chip makers whose foundries it uses. It expects more competition from high-volume makers using low-cost silicon processes. 42434445

Its heritage runs back more than 70 years to Microwave Associates, and the MACOM brand more than 30; the holding company was incorporated in Delaware in March 2009. Recent purchases: Linearizer Technology in March 2023, for amplifier modules and linearizers; the fab and assets of OMMIC in France in May 2023; the RF business of Wolfspeed, gallium nitride on silicon carbide products, in December 2023, whose North Carolina fab it took control of on July 25, 2025; and ENGIN-IC, a fabless designer of GaAs and GaN chips, in November 2024. It leases that North Carolina fab from a third party for twelve years, with an option to buy. 4647484950515253

Export rules shape where it can sell. Most of its products fall under US export regulations and some need licenses for certain countries, while its military products are governed by the International Traffic in Arms Regulations in the United States and by the EU Common Military List and French Defense Code in France. It warns that China's push to depend less on foreign chip makers could raise costs there, foster Chinese competitors and cut demand for its products. 545556

What drives growth, line by line

Industrial & Defense. The largest market, 43.4% of fiscal 2025 revenue, down from 48.2% as the others grew faster. It grew 19.4%, by $68.1 million, which the filing credits to defense programs and a full year of acquired businesses. 5758

Data Center. The fastest-growing market: 30.3% of revenue, up from 27.1%, after growing 48.0%, by $95.0 million, on sales of high-performance analog and coherent data center products for speeds from 100G up to 1.6T. These are the building blocks its customers assemble into optical transceivers for data centers. 575960

Telecom. 26.3% of revenue, up from 24.7%, after growing 41.4%, by $74.6 million, on products for 5G and satellite communications, broadband access and a full year of acquired businesses. 5761

Revenue rose 32.6% to $967.3 million in a 53-week year, against 52 weeks the year before. Income from operations rose to 129.7 million dollars from 73.7 million, yet the year ended with a net loss of 54.2 million, because of a $193.1 million charge for exchanging most of its convertible notes due in 2026 for new notes due in 2029, shares and cash. 62636465

What comes next, in the company's own words: it expects data center revenue to be driven by the move to faster links up to 1.6T, telecom by 5G deployments and satellite networks, and industrial and defense by its broader portfolio, but it also expects macroeconomic and geopolitical conditions may weaken near-term demand in all three markets. 66676869

The read's section on the people who run it is on the People tab.

What the desk infers Inferred

1. Inferred

   More of MACOM's sales now pass through intermediaries: the share sold through distributors and resellers has grown while its top direct customers' share has shrunk, so its biggest end buyers are less and less visible in its own customer figures.

   Because

   • Distributors took 32.3% of revenue in fiscal 2025, up from 29.3% in 2024 and 24.0% in 2023. 18
   • Two resellers each took more than a tenth in fiscal 2025, 12.4% and 11.2%, the second for the first time. 19
   • The top 25 direct customers' share fell to 45.6% from 47.0% and 51.5%, and no direct customer reached a tenth. 19
   Confidence 75 of 100Wrong if A year in which the share sold directly to MACOM's largest customers rises again while the distributor and reseller shares fall.
2. Inferred

   Much of MACOM's data center growth most likely went to optical transceiver makers located in China, which assemble its chips into modules.

   Because

   • Sales to customers in China rose 54.5%, to 274.6 million dollars and 28.4% of revenue, the fastest rise of any region. 29
   • In the same year data center revenue rose 48.0%, by $95.0 million, the fastest of its three markets. 5759
   • Its data center products are the building blocks its customers assemble into optical transceivers. 60
   • Revenue by region follows where customers are located. 70
   Confidence 50 of 100Wrong if A disclosure showing that most of the growth in China came from industrial, defense or telecom products rather than data center parts.
3. Inferred

   MACOM chose not to spend its own capital buying the North Carolina fab site: it passed its right to buy to a third party and leased the site back, in line with the fab-lite model it says keeps capital needs down.

   Because

   • It calls its model fab-lite, outsourcing some manufacturing rather than investing heavily in capital-intensive facilities, which it says reduces its capital requirements. 24
   • It held a right of first offer on the fab property, exercised it and assigned it to a third party, which bought the property, and then leased it for twelve years with two ten-year renewal options. 53
   • It kept an option to buy the property during the lease. 71
   • Cash was not the constraint: interest income rose to $29.9 million in fiscal 2025 on larger short-term investments. 72
   Confidence 65 of 100Wrong if A later filing showing MACOM bought the site under its option soon after the lease began, or explaining the leaseback by a shortage of cash.