Welcome to our dedicated page for RAMBUS SEC filings (Ticker: RMBS), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on RAMBUS's stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.
Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time EDGAR feed updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into RAMBUS's regulatory disclosures and financial reporting.
Rambus executive EVP, COO Fan Xianzhi Sean reported equity compensation activity in company stock. On February 1, 2026, he acquired 148,802 shares of Rambus common stock at $0 per share through vesting of performance restricted stock units, each representing one share.
On the same date, 92,403 shares were withheld at $113.71 per share to cover tax liabilities related to restricted stock unit vesting. After these transactions, he directly beneficially owned 193,954 shares of Rambus common stock.
Rambus Inc. filed a current report to disclose that it issued an earnings press release for the quarter ended December 31, 2025. The company furnished this press release as an exhibit and specified that it is not treated as filed for liability purposes under the Exchange Act.
BlackRock, Inc. has filed an amended Schedule 13G reporting beneficial ownership of 15,060,232 shares of Rambus Inc. common stock, representing 14.0% of the outstanding class. BlackRock reports sole power to vote 14,776,143 shares and sole power to dispose of 15,060,232 shares, with no shared voting or dispositive power.
The filing reflects holdings by certain BlackRock business units, while other disaggregated units are excluded. Various underlying persons have rights to dividends or sale proceeds, but no single person has more than five percent of Rambus’s outstanding common shares. BlackRock certifies that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of Rambus.
Rambus Inc. executive reports small stock gift
A Rambus Inc. (RMBS) executive who serves as EVP and COO reported a bona fide gift of 300 shares of Rambus common stock on November 21, 2025. The transaction was reported on a Form 4 as a disposition coded "G" at a price of $0, indicating it was a gift rather than a sale. After this transaction, the executive beneficially owns 137,555 shares of Rambus common stock, held directly.
Rambus Inc. executive Brian Wu, EVP and COO, reported a Form 4 transaction reflecting a bona fide gift of company stock. On 11/19/2025, Wu disposed of 300 shares of Rambus common stock as a gift at a reported price of $0.00, meaning he received no compensation for the transfer. Following this transaction, he beneficially owned 137,855 shares in direct ownership. The filing notes explicitly that no compensation was given in relation to the gift.
Rambus Inc. (RMBS) director reported open‑market sales of common stock. On 11/07/2025, the reporting person sold 5,000 shares at a weighted average price of $102.352, with trades ranging from $102.343 to $102.455. On 11/10/2025, an additional 4,000 shares were sold at an exact price of $111.785.
After these transactions, 20,394 shares were indirectly beneficially owned, held by the Stang Family Trust for which the reporting person serves as a trustee.
Rambus Inc. reported strong Q3 2025 results driven by memory interface chips. Revenue reached $178.5 million, up from $145.5 million a year ago. Product revenue set a quarterly record at $93.3 million, with royalties at $65.1 million and contract and other revenue at $20.1 million. Gross profit was $141.9 million and operating income was $63.3 million. Net income was $48.4 million, or diluted EPS of $0.44.
For the nine months, revenue totaled $517.4 million and operating cash flow was $260.2 million. Cash, cash equivalents and marketable securities were $673.3 million as of September 30, 2025. Shares outstanding were 107,650,133 as of September 30, 2025. The company repurchased 0.1 million shares for approximately $5.8 million year-to-date under its 2020 program, with authorization remaining for about 5.6 million shares.
Geographically in Q3, revenue included $91.7 million from South Korea and $37.6 million from Singapore. The company recorded an uncertain tax position reserve tied to South Korea withholding tax refund claims, reducing related long-term tax receivables and payables to zero with no tax expense impact in the period.
Rambus Inc. (RMBS) furnished an 8-K to announce results for the quarter ended September 30, 2025. The company issued an earnings press release, which is attached as Exhibit 99.1 and incorporated by reference.
The Item 2.02 information is stated as furnished, not filed under the Exchange Act, and therefore is not subject to Section 18 liabilities nor automatically incorporated into other filings. The submission also includes Exhibit 104 for the Inline XBRL cover page. The report is dated October 27, 2025.
Rambus Inc. reported a proposed sale under Rule 144 of 9,074 common shares held as performance shares that were acquired on 02/01/2025. The broker listed is Morgan Stanley Smith Barney LLC and the notice cites an aggregate market value of $920,971.98 for the shares and an approximate sale date of 10/06/2025 on NASDAQ. The filer indicates the securities were issued by the company (acquired from the issuer) and shows a prior sale of the same number of shares on 09/15/2025 generating gross proceeds of $832,098.50. Outstanding common shares are listed as 107,593,820, making the block a very small fraction of the total.
RAMBUS INC SVP and CFO Desmond Lynch reported selling a total of 9,074 shares of common stock on October 6, 2025 in two transactions reported as “Sale in open market or private transaction.” The prices are disclosed as weighted averages, with underlying trades between $100.75–$101.665 and $101.82–$102.13 per share, pursuant to a Rule 10b5-1 trading plan adopted June 13, 2025. After these sales, he directly holds 55,356 shares of common stock.