Exhibit 99.1 News Release RAMBUS REPORTS FIRST QUARTER 2025 FINANCIAL RESULTS • Exceeded guidance for Q1 revenue and earnings SAN JOSE, Calif. – April 28, 2025 – Rambus Inc. (NASDAQ:RMBS), a provider of industry-leading chips and IP making data faster and safer, today reported financial results for the first quarter ended March 31, 2025. GAAP revenue for the first quarter was $166.7 million, licensing billings were$73.3 million, product revenue was $76.3 million, and contract and other revenue was$16.4 mi ...