New York, May 23, 2026, 15:06 EDT
Rambus Inc. finished the week up 12.5%, closing Friday at $142.98. Investors bought back in ahead of the long U.S. market weekend. Rambus beat the Nasdaq Composite’s 0.5% gain and the PHLX semiconductor index, which added about 5.3%.
Markets are paused for the holiday. Nasdaq lists U.S. equity markets as closed on Monday, May 25, for Memorial Day. Regular trading comes back Tuesday, 9:30 a.m. to 4 p.m. Eastern.
RMBS dropped on Monday and Tuesday, then turned around sharply midweek, jumping 9.45% Wednesday and 6.18% Thursday before tacking on 0.82% Friday. The late-week bounce lifted the stock closer to the top of its latest range. The trading was choppy.
Rambus sells memory-interface chips and offers silicon IP, which are reusable chip design blocks customers can license. The company now pitches itself more around artificial intelligence servers, arguing its products can provide faster connections between processors and memory to cut data bottlenecks.
Rambus said late April that Q1 revenue came in at $180.2 million, with product revenue up 15% on the year to $88.0 million. Cash from operations was $83.2 million. CEO Luc Seraphin said the company is seeing demand for “higher memory bandwidth, efficient data movement, and scalable connectivity” as AI workloads ramp. Rambus Investor
Rambus is calling for product revenue between $95 million and $101 million this quarter. The company also sees royalty revenue in a $72 million to $78 million range and expects licensing billings between $76 million and $82 million. Licensing billings refers to the amounts invoiced to customers for rights to use Rambus technology, with adjustments for advance payments.
Rambus is pushing the AI infrastructure angle again. The company rolled out PCIe 7.0 switch IP with time division multiplexing on May 5. The multiplexing method helps schedule traffic in fixed time slots, so data links run more efficiently. “It is no longer sufficient to simply add more lanes,” Simon Blake-Wilson, senior vice president and general manager of silicon IP, said as AI drives new system designs. Rambus Investor
Narrow as it is, the competitive read-through matters. Synopsys has been selling PCIe 7.0 IP for AI and high-performance computing. Marvell Technology, which is also in the data-infrastructure chip space, is set to report on May 27 and could give a new read on AI server demand. Marvell shares climbed from $176.89 on May 15 to $196.33 by May 22.
Rambus caught a look with a new SEC filing, though it wasn’t about operations. The company posted a Form 144 dated May 22 on its investor-relations site, which shows plans for a possible sale of securities. These filings come up when insiders want to sell more than 5,000 shares or $50,000 worth in three months, according to the SEC.
Rambus’s rally leaves the stock with less margin for error. Royalty revenue for the first quarter fell to $69.6 million, down from $74.0 million last year. The company warns in its filings about risks in signing or renewing customer deals, revenue concentration, customer demand, shipments, product mix and supply partners. A slowdown in AI server spending, lapse in licensing renewals or weaker sector mood could put pressure on this week’s gains.
Rambus doesn’t have much on its earnings schedule this week. Next up for the company are a batch of investor conferences in early June: Baird on June 2, Evercore’s TMT meet on June 3, and Rosenblatt’s tech summit on June 9.
