Every Form 4 that Rambus Inc (RMBS) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow RMBS and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full RMBS filings page.
Rambus Inc. director Charles Kissner reported that Kissner and Associates LLC sold 5,000 shares of Common Stock at $105.00 per share on September 22, 2026. The sale was made under a Rule 10b5-1 trading plan adopted on May 8, 2026. The LLC held 8,747 shares after the sale; Charles Kissner reported direct holdings of 40,545 shares.
Rambus Inc. director Charles Kissner, through Kissner and Associates LLC, sold 5,000 shares of Common Stock of Rambus on August 7, 2026 at an exact price of $100.92 per share. The sale was effected under a Rule 10b5-1 trading plan adopted on May 8, 2026. Following this transaction, the LLC held 13,747 shares indirectly attributed to Kissner, and he also reported 40,545 shares held directly.
Rambus Inc. director Necip Sayiner sold 5,000 shares of Common Stock in an open-market transaction. The shares were sold at an exact price of $170.15 each, according to the filing footnote. After this sale, Sayiner directly holds 18,223 Rambus shares.
Rambus Inc. director Emiko Higashi reported selling a total of 10,000 shares of Common Stock in open-market transactions. The sales occurred on June 2, 2026, with 5,000 shares sold at $158.00 per share and 5,000 shares sold at $163.00 per share. Following these transactions, Higashi directly holds 49,519 shares of Rambus common stock, indicating she retains a substantial equity stake after the sale.
Rambus Inc. director-related trust reports open-market sale of shares. A trust associated with director Eric B. Stang, the Stang Family Trust dated September 2, 2004, sold 5,000 shares of Rambus common stock at $146.00 per share in an open-market transaction.
Following the sale, the trust held 19,218 Rambus common shares indirectly, while Stang also held 2,223 shares directly as of the reported date.
Rambus Inc. director Emiko Higashi reported an open-market sale of 5,000 shares of Common Stock on May 26, 2026 at an exact price of $157.5701 per share. After this transaction, Higashi directly owns 59,519 shares of Rambus common stock.
Rambus EVP and COO Sean Xianzhi Fan reported selling 37,914 shares of Rambus common stock in open-market transactions. The sales occurred on May 26, 2026 at prices around $151–$152 per share, including trades at a weighted average price of $151.6896 within a range of $151.27 to $152.18, and a separate block of 100 shares at $152.35. These were routine open-market sales of directly owned shares.
Rambus Inc. senior vice president and general counsel John Shinn reported an open-market sale of company stock. On May 22, he sold 1,000 shares of Rambus common stock at an exact price of $143.63 per share. After this transaction, he directly holds 21,112 shares of Rambus common stock.
Rambus director Necip Sayiner reported an open-market sale of company stock. On May 8, 2026, he sold 9,824 shares of Rambus Inc. common stock at $130.18 per share. After this transaction, he directly holds 23,223 Rambus common shares.
Rambus Inc. director Steven Laub sold Common Stock in an open-market transaction. On May 7, 2026, he sold 1,500 shares at a weighted average price of $125.5195 per share, with individual trade prices ranging from $125.49 to $125.52. After the sale, he directly owned 7,519 shares of Rambus Common Stock.
Gagneja Sumeet reported acquisition or exercise transactions in this Form 4 filing.
Rambus Inc. SVP and CFO Sumeet Gagneja received two new stock-based compensation awards. On May 1, 2026, he was granted 26,802 shares of common stock represented by RSUs that vest in four equal annual installments beginning on May 1, 2027. He was also granted 14,518 shares of common stock represented by RSUs that vest in two equal annual installments beginning on May 1, 2027. Each RSU represents a contingent right to receive one share of RMBS common stock upon vesting, and both awards are held directly.
Rambus Inc. director Meera Rao reported an open-market sale of 2,972 shares of Rambus common stock at $150.30 per share. The transaction occurred on April 24, 2026 and was executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 14, 2025. Following the sale, Rao directly holds 19,974 shares of Rambus common stock.
Rambus Inc. director Meera Rao sold 8,538 shares of Common Stock in an open-market transaction. The shares were sold at an exact price of $118.08 per share pursuant to a Rule 10b5-1 trading plan adopted on November 14, 2025.
Following this planned sale, Rao continues to hold 22,946 Rambus shares directly, indicating she retains a sizable equity stake in the company despite reducing her position.
Rambus Inc. Chief Accounting Officer John K. Allen reported a tax-withholding disposition of 1,131 shares of common stock. The shares were withheld by the company at a price of $92.22 per share to cover his tax liability related to the vesting of restricted stock units.
After this non‑open‑market transaction, Allen directly holds 17,131 shares of Rambus common stock. This type of withholding is a routine administrative step associated with equity compensation and does not represent an open‑market sale or purchase decision.
Rambus director Emiko Higashi received an equity grant of 2,223 shares of common stock in the form of restricted stock units (RSUs). The RSUs were awarded at no cash cost and will fully vest on April 1, 2027, or the first business day thereafter. Each RSU converts into one share of RMBS common stock upon vesting. Following this grant, Higashi directly holds 64,519 shares, reflecting ongoing use of stock-based compensation to align director interests with shareholders over the long term.
Rambus Inc. director Steven Laub received an equity grant of 2,223 shares of common stock in the form of restricted stock units (RSUs). These RSUs vest on April 1, 2027, or the first business day thereafter, at which time each unit converts into one share of RMBS common stock.
Following this grant, Laub holds 9,019 shares of Rambus common stock directly, indicating this is a relatively small, routine compensation-related award rather than an open-market purchase or sale.
Rao Meera reported acquisition or exercise transactions in this Form 4 filing.
Rambus Inc. director Meera Rao received a grant of 2,223 restricted stock units (RSUs) of Rambus common stock. The award was recorded at a price of $0.00 per share, reflecting a compensation grant rather than a market purchase.
All 2,223 RSUs vest on April 1, 2027, or the first business day thereafter, and each RSU represents the right to receive one share of Rambus common stock. Following this grant, Rao directly holds 31,484 shares, indicating a routine equity-based compensation award rather than an open-market transaction.
Sayiner Necip reported acquisition or exercise transactions in this Form 4 filing.
Rambus Inc. director Necip Sayiner received an equity award of 2,223 shares of common stock on April 1, 2026. The award is in the form of restricted stock units, with each RSU representing the right to receive one share of RMBS common stock. All RSUs vest on April 1, 2027, or the first business day thereafter. Following this grant, Sayiner directly holds 33,047 shares of Rambus common stock.
Rambus Inc. director Eric B. Stang received an equity grant of 2,223 shares of Common Stock in the form of restricted stock units (RSUs). The RSUs vest on April 1, 2027, or the first business day thereafter, and each RSU converts into one share of RMBS common stock upon vesting.
After this grant, Stang holds 2,223 shares directly from this RSU award and 24,218 shares indirectly through the Stang Family Trust dated September 2, 2004, for which he serves as a trustee.
Rambus Inc. director Victor Peng reported an acquisition of company equity through a stock award. He received 2,223 restricted stock units (RSUs), each representing the contingent right to receive one share of RMBS common stock. All RSUs vest on April 1, 2027 or the first business day thereafter. Following this grant, Peng directly holds 2,391 shares of Rambus common stock.
KISSNER CHARLES reported acquisition or exercise transactions in this Form 4 filing.
Rambus Inc. director Charles Kissner received an equity award of 2,223 restricted stock units (RSUs) of common stock. The RSUs were granted at no cash cost on April 1, 2026 and each unit represents the right to receive one RMBS share.
All 2,223 RSUs vest on April 1, 2027 or the first business day thereafter. Following this grant, Kissner directly holds 40,545 common shares, and an additional 18,747 shares are held indirectly through Kissner and Associates LLC, where he is the owner.
Rambus Inc. senior vice president and general counsel John Shinn received 5,558 shares of common stock in the form of restricted stock units (RSUs). The RSUs vest in four equal annual installments beginning on April 1, 2027, with each RSU representing one share of RMBS common stock.
On the same date, 1,913 shares were withheld at $89.95 per share to cover his tax liability related to RSU vesting. After these compensation-related transactions, Shinn directly holds 22,112 shares of Rambus common stock.
Rambus Inc. President and CEO Luc Seraphin reported equity compensation activity and a modest share sale. On April 1, 2026, he received 32,684 shares of Common Stock as a grant, represented by restricted stock units that vest in four equal annual installments beginning on April 1, 2027.
Also on April 1, 12,561 shares were withheld at $89.95 per share to cover his tax liability related to RSU vesting. On April 2, 2026, he executed open-market sales totaling 5,426 shares of Common Stock at weighted average prices of $86.0396, $87.1145, and $88.3501, under a pre-arranged Rule 10b5-1 trading plan. Following these transactions, he directly holds 345,767 shares of Rambus Common Stock.
Rambus EVP and COO Fan Xianzhi Sean reported routine equity compensation and tax withholding transactions. On April 1, 2026, he received 22,234 restricted stock units (RSUs), each representing one share of Rambus common stock, vesting in four equal annual installments beginning on April 1, 2027.
On the same date, 9,916 shares of common stock were withheld at $89.95 per share to cover tax liabilities arising from RSU vesting. After these transactions, he directly held 206,272 shares of Rambus common stock.
Rambus Chief Accounting Officer John K. Allen reported equity compensation and related tax withholding transactions in company stock. He received 2,779 restricted stock units, each representing a right to one share of Rambus common stock, vesting in four equal annual installments starting on April 1, 2027. On the same date, 495 shares and 658 shares of common stock were withheld at $89.95 per share to cover tax liabilities from RSU vesting, rather than being sold on the open market. Following these transactions, Allen directly holds 18,262 shares of Rambus common stock, which include shares acquired through the Rambus Inc. 2015 Employee Stock Purchase Plan.
Rambus Inc. SVP and General Counsel John Shinn reported selling 4,556 shares of Rambus common stock. The open-market sales took place on March 10, 2026 at weighted average prices of $88.6361 and $89.5450, in multiple trades within disclosed price ranges, under a Rule 10b5-1 trading plan adopted on December 2, 2025. Following these transactions, Shinn directly holds 18,467 shares of Rambus common stock.
Rambus Inc. senior vice president and general counsel John Shinn reported open‑market sales of 4,557 shares of common stock. On March 3, 2026, he sold 2,254 shares at an average price of $92.7704, 1,603 shares at $94.0698, and 700 shares at $94.8871. The filing states these transactions were made under a pre‑arranged Rule 10b5‑1 trading plan adopted on December 2, 2025. After the sales, Shinn directly owned 23,023 Rambus shares.
Rambus Inc. President and CEO Luc Seraphin reported selling a total of 39,914 shares of common stock in open-market transactions on March 2, 2026, at weighted average prices ranging from about $95.59 to $102.17 per share. The sales were made under a pre-arranged Rule 10b5-1 trading plan adopted on November 11, 2025, and Seraphin continues to hold 331,070 shares directly after these transactions.
Rambus Inc. director Victor Peng reported an equity award of 168 shares of common stock. The award is structured as restricted stock units granted at a price of $0.00 per share, reflecting a compensatory grant rather than an open-market purchase.
All 168 RSUs are scheduled to vest on April 1, 2026, or the first business day thereafter. Each RSU converts into one share of Rambus common stock at vesting, so Peng’s ownership will increase as the units vest, assuming continued service and satisfaction of the vesting conditions.
Rambus Inc. senior vice president and CFO Desmond Lynch sold 4,273 shares of common stock in an open-market transaction at $101.53 per share. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan, and Lynch now holds 63,618 shares of Rambus common stock directly.
Rambus Inc. SVP and General Counsel John Shinn reported equity compensation activity and related tax withholding. On February 1, 2026, he acquired 17,276 shares of common stock at $0 through performance restricted stock units that vest based on company performance and continued service. On the same date, 9,884 shares at $113.71 per share were withheld to cover his tax liability from restricted stock unit vesting. After these transactions, Shinn directly owned 27,580 shares of Rambus common stock.
Rambus Inc. SVP and CFO Desmond Lynch reported equity-related transactions in company common stock. On February 1, 2026, he acquired 34,554 shares at $0 upon vesting of performance restricted stock units tied to company metrics and continued service. On the same date, 22,105 shares were withheld at $113.71 per share to satisfy tax obligations from restricted stock vesting. After these transactions, Lynch directly owned 67,891 shares of Rambus common stock.
Rambus Inc. President and CEO Seraphin Luc reported equity compensation and related tax withholding in company stock. On February 1, 2026, he acquired 143,744 shares of common stock at $0 per share, represented by performance restricted stock units that vest based on company performance metrics and continued service through February 1, 2026.
On the same date, 92,523 shares of common stock were withheld at a price of $113.71 per share to satisfy his tax liability arising from the vesting of restricted stock units. After these transactions, he directly beneficially owned 370,984 shares of Rambus common stock, including 522 shares acquired through the Rambus Inc. 2015 Employee Stock Purchase Plan.
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. 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 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.
Rambus Inc. (RMBS) director Meera Rao reported a sale of common stock under a Rule 10b5-1 plan. The Form 4 shows a transaction dated 10/01/2025 in which 653 shares were sold at $101.99 per share, and following the sale Ms. Rao beneficially owns 29,261 shares directly. The filing notes the sale was effected pursuant to a 10b5-1 trading plan adopted May 30, 2025. The Form 4 is signed by power of attorney on 10/02/2025. The filing contains only this single non-derivative disposition and no other compensatory or derivative transactions are reported.