RingCentral, Inc.

Securities Trading Plans of Directors and Executive Officers

During our last fiscal quarter, the following director and officer, respectively, adopted a “Rule 10b5-1 trading arrangement,” as defined in Regulation S-K Item 408, as follows:

On August 21, 2025, Amy Guggenheim Shenkan, a member of ourboard of directors, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of up to 4,917 shares of Class A common stock. The number of shares that may be sold under the trading arrangement may also be increased by the number of shares of the company’s Class A common stock, if any (not yet determinable), that are awarded to Ms. Guggenheim Shenkan under the company’s non-employee director compensation program during the term of the trading arrangement. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until October 9, 2026 or earlier if all transactions under the trading arrangement are completed.

On September 15, 2025, Vaibhav Agarwal, our Chief Financial Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of up to 84,798 shares of Class A common stock (the “September 2025 Trading Plan”). The number of shares that may be sold under the September 2025 Trading Plan may also be increased by the number of shares of Class A common stock, if any (not yet determinable), that are awarded to Mr. Agarwal under the Company’s employee equity bonus and executive equity compensation plans. The number of shares that may be sold under the September 2025 Trading Plan will be reduced by the number of shares (not yet determinable) withheld to satisfy tax obligations upon the vesting of certain outstanding equity awards. The September 2025 Trading Plan is intended to satisfy the affirmative defense in Rule 10b5-1(c). The September 2025 Trading Plan goes into effect, with respect to any potential trading activity, following the expiration of Mr. Agarwal’s current 10b5-1 trading arrangement, which was entered into on September 13, 2024 (the

“September 2024 Trading Plan”), and the duration of the trading arrangement is until September 30, 2026 or earlier if all transactions under the trading arrangement are completed. The September 2025 Trading Plan does not modify or terminate the September 2024 Trading Plan in any respect and the timing of any trading activity under the two plans does not overlap.

No other directors or officers, as defined in Rule 16a-1(f), have adopted and/orterminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” each as defined in Regulation S-K Item 408, during the last fiscal quarter.

Item 6. Exhibits.

The exhibits listed in the accompanying Exhibit Index are filed or incorporated by reference as part of this Quarterly Report on Form 10-Q.