Rambus Q3 Revenue Hits Record $218.3m, Up 22%

Rambus took in $218.3m in the third quarter of 2026, its highest quarterly revenue on record and 22% more than a year earlier. The figure beat the company’s own forecast of $210m to $216m, and Rambus is guiding for more again in the final three months of the year.

The quarter belonged to the memory interface chips that Rambus sells for server and PC memory modules. Rambus’s product revenue, made up mainly of those memory interface chips, reached a record $114.3m, up 15% on the second quarter and 22% on a year ago, according to the company’s results release, which it also filed with the US Securities and Exchange Commission as an exhibit to a Form 8-K.

In brief

Revenue hit a record $218.3m, with product sales at a record $114.3m and operating cash flow at a record $102.5m.
Rambus expects fourth-quarter revenue of $227m to $233m, led by product sales of $127m to $133m.
Five customers still provide nearly two-thirds of revenue, and the forecast depends on signing customer agreements.

Every revenue line grew on a year earlier

All three of Rambus’s revenue streams rose. Royalties from its patent and silicon IP licences came to $77.0m, against $65.1m a year earlier. Contract and other revenue, mostly design work on its interface and security IP, rose to $27.0m from $20.1m.

Profit grew faster than sales. GAAP net income was $74.6m, up from $48.4m, and GAAP diluted earnings per share were $0.69, against $0.44. On the adjusted, non-GAAP basis the company prefers, earnings per share were $0.84, up from $0.62. The GAAP operating margin widened to 38% from 35%.

“Rambus delivered record quarterly revenue and earnings that exceeded our guidance, with strong customer demand driving record product revenue and record cash from operations,” said chief executive Luc Seraphin.

Over the first nine months of 2026, revenue reached $605.9m, about 17% more than in the same period of 2025.

Buybacks outran a record cash quarter

Operating activities brought in a record $102.5m. Rambus spent more than that on its own shares: $135.4m on repurchases in the quarter, plus $11.2m on capital spending. As a result, cash and marketable securities fell by $48.0m to $776.9m at 30 September.

The quarterly report on Form 10-Q, filed minutes after the results, gives more detail on where the money comes from. Product sales were 52% of revenue in the quarter, royalties 35% and contract work 13%. Rambus sells its memory interface chips to the big DRAM makers, naming Micron, Samsung and SK hynix, and directly to system makers and cloud providers. It says product revenue rose by about $21.0m from a year earlier “due to higher sales of memory interface chips, as well as contributions from new products”.

Those new products include the power management chip for LPDDR6 SOCAMM2 modules that Rambus began sampling earlier this month, which the release lists among the quarter’s highlights alongside new Root of Trust security IP for data centres.

The fourth-quarter forecast leans on product sales

For the quarter to 31 December, Rambus expects revenue of $227m to $233m. Product revenue is forecast at $127m to $133m, royalties at $68m to $74m and contract and other revenue at $26m to $32m. It expects GAAP earnings per share of $0.68 to $0.76 and non-GAAP earnings per share of $0.84 to $0.92.

“We expect an even stronger performance in Q4,” Seraphin said. The release adds a standard caveat: hitting the range “will require that the Company sign customer agreements for various product sales and solutions licensing, among other matters.”

Product sales, not patents, now set Rambus’s pace

Royalties from patents and IP licences still bring in more than a third of Rambus’s revenue, but the guidance shows where the growth is expected to come from. At the midpoints, Rambus expects product revenue to rise by roughly 14% from the third quarter while royalties fall, which means nearly all of the forecast growth rests on chip shipments.

That ties its fortunes more closely to the memory cycle. The same DRAM makers that buy Rambus’s interface chips have been riding a price surge, with Nanya reporting a 61.9% jump in third-quarter revenue, while further up the chain TSMC reported a record third quarter. Because Rambus’s chips go into memory modules rather than the memory itself, its sales follow module volumes and the arrival of new formats, such as the CXL memory SK hynix showed at OCP and the LPDDR6 SOCAMM2 modules its new power chip is designed for.

The risk is concentration. Rambus’s top five customers made up about 64% of its revenue in the quarter, down from 67% a year earlier but still high. A company that sells mostly to three memory makers and a few large buyers can see its numbers move sharply if one of them changes its orders. The buyback pace also meant Rambus spent more than its operating cash flow in the quarter, drawing its cash pile down, though it still held $776.9m at the end of September.

The next test comes when Rambus reports its fourth quarter, which will show whether product sales reached the $127m-plus it has forecast without the help of royalties.