Gitlab Inc.

Rule 10b5-1 Trading Plans

Sytse Sijbrandij 10b5-1 Plan

On December 19, 2025, Sytse Sijbrandij, Executive Chair of the Board of Directors, entered into, through Mr. Sibrandij’s revocable trust (the “Trust”), a new pre-arranged written stock sale plan in accordance with Rule 10b5-1 (the “Sijbrandij Rule 10b5-1 Plan”) under the Exchange Act for the sale of shares of the Company’s Class A common stock (resulting from the conversion of shares of the Company’s Class B common stock). The Sijbrandij Rule 10b5-1 Plan was entered into during an open trading window in accordance with the Company’s policies regarding transactions in the Company’s securities and is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act. The Sijbrandij Rule 10b5-1 Plan provides for the potential sale of approximately 1,394,400 shares, which reflects the aggregate number of shares of the Company’s Class A common stock resulting from the conversion of shares of the Company’s Class B common stock, so long as the market price of the Company’s Class A common stock is higher than certain minimum threshold prices specified in the Sijbrandij Rule 10b5-1 Plan, between April 15, 2026 and March 17, 2027.

The Sijbrandij Rule 10b5-1 Plan includes a representation from Mr. Sijbrandij, on behalf of Trust, to the broker administering the plan that he was not in possession of any material nonpublic information regarding the Company or the securities subject to the Sijbrandij Rule 10b5-1 Plan at the time it was entered into. A similar representation was made to the Company in connection with the adoption of the Sijbrandij Rule 10b5-1 Plan under the Company’s policies regarding transactions in the Company’s securities. Those representations were made as of the date of adoption of the Sijbrandij Rule 10b5-1 Plan, and speak only as of such date. In making those representations, there is no assurance with respect to any material nonpublic information of which Mr. Sijbrandij was unaware, or with respect to any material nonpublic information acquired by Mr. Sijbrandij or the Company after the date of the representation.

Once executed, transactions under each of the Sijbrandij Rule 10b5-1 Plan will be disclosed publicly through Form 4 and/or Form 144 filings with the Securities and Exchange Commission in accordance with applicable securities laws, rules, and regulations. Except as may be required by law, the Company does not undertake any obligation to update or report any modification, termination, or other activity under current or future Rule 10b5-1 plans that may be adopted by Mr. Sijbrandij or other officers or directors of the Company.