RMBS

All shares sold at an exact price of $170.15.

All shares sold at an exact price of $158.00.

All shares sold at an exact price of $163.00.

All shares sold at an exact price of $146.00

Shares held directly by the Stang Family Trust dated September 2, 2004 for which the Reporting Person serves as a trustee.

All shares sold at an exact price of $152.35

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $151.27 to $152.18, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

All shares sold at an exact price of $157.5701.

All shares sold at an exact price of $143.63.

All shares sold at an exact price of $130.18.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.49 to $125.52, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The shares are represented by RSUs which vest in two equal annual installments beginning on May 1, 2027 or the first business trading day thereafter. Each RSU represents a contingent right to receive one share of RMBS common stock.

The shares are represented by RSUs which vest in four equal annual installments beginning on May 1, 2027 or the first business trading day thereafter. Each RSU represents a contingent right to receive one share of RMBS common stock.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 14, 2025.

All shares sold at an exact price of $150.30.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 14, 2025.

All shares sold at an exact price of $118.08

The shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units, or RSUs.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $86.81 to $87.80, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $85.70 to $86.48, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $87.85 to $88.71, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

The shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units, or RSUs.

The shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units, or RSUs.

The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

The shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units, or RSUs.

The shares are represented by RSUs which vest in four equal annual installments beginning on April 1, 2027 or the first business trading day thereafter. Each RSU represents a contingent right to receive one share of RMBS common stock.

Includes an exempt transaction of 269 shares acquired through the Rambus Inc. 2015 Employee Stock Purchase plan.

Includes an exempt transaction of 277 shares acquired through the Rambus Inc. 2015 Employee Stock Purchase plan.

The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

The shares are represented by RSUs which vest in four equal annual installments beginning on April 1, 2027 or the first business trading day thereafter. Each RSU represents a contingent right to receive one share of RMBS common stock.

The shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units, or RSUs.

The shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units, or RSUs.

The shares are represented by RSUs which vest in four equal annual installments beginning on April 1, 2027 or the first business trading day thereafter. Each RSU represents a contingent right to receive one share of RMBS common stock.

The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

The shares are represented by RSUs which vest in four equal annual installments beginning on April 1, 2027 or the first business trading day thereafter. Each RSU represents a contingent right to receive one share of RMBS common stock.

The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on December 2, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.44 to $89.65, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on December 2, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.36 to $89.16, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on December 2, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $93.475 to $94.385, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on December 2, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $94.62 to $95.115, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on December 2, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $92.20 to $93.20, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $96.64 to $97.64, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $98.69 to $99.635, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $101.28 to $102.17, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $97.68 to $98.64, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The shares are represented by restricted stock units, or RSUs, all of which vest on April 1, 2026 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $95.59 to $96.40, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 11, 2025.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $99.875 to $100.85, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 19, 2025.

All shares sold at $101.53

The shares are represented by performance restricted stock units, or PRSUs, all of which vest on February 1, 2026 based upon assessed achievement of the Company's performance metrics and continued service to the Company through the vesting date. Each PRSU represents a contingent right to receive one share of RMBS common stock.

Includes an exempt transaction of 86 shares acquired through the Rambus, Inc. 2015 Employee Stock Purchase Plan

The shares are represented by performance restricted stock units, or PRSUs, all of which vest on February 1, 2026 based upon assessed achievement of the Company's performance metrics and continued service to the Company through the vesting date. Each PRSU represents a contingent right to receive one share of RMBS common stock.

Includes an exempt transaction of 522 shares acquired through the Rambus Inc. 2015 Employee Stock Purchase Plan.