X0609 4 2026-09-24 0 0001653482 Gitlab Inc. GTLB 0001886022 Sijbrandij Sytse false C/O GITLAB INC. NOT APPLICABLE DE 1 0 0 0 1 Class A Common Stock 2026-09-24 4 S 0 842084 48.55 D 14059967 I By Trust Class A Common Stock 2026-09-24 4 S 0 138626 49.12 D 13921341 I By Trust Class A Common Stock 2026-09-25 4 S 0 281121 47.25 D 13640220 I By Trust Class A Common Stock 2026-09-25 4 S 0 424369 48.08 D 13215851 I By Trust Class A Common Stock 2026-09-28 4 S 0 90995 44.83 D 13124856 I By Trust Class A Common Stock 2026-09-28 4 S 0 295460 46.08 D 12829396 I By Trust Class A Common Stock 2026-09-28 4 S 0 43545 46.31 D 12785851 I By Trust This transaction was executed pursuant to a trading plan entered into by the reporting person, as the sole trustee of the Sytse Sijbrandij Revocable Trust dated February 21, 2019, on June 25, 2026 in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.02 to $49.015, inclusive. The Reporting Person undertakes to provide to GitLab Inc., any security holder of GitLab Inc., or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote 2, footnote 4, footnote 5, footnote 6, footnote 7, footnote 8, and footnote 9. These securities are held by the Sytse Sijbrandij Revocable Trust dated February 21, 2019, of which the Reporting Person is the sole trustee. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $49.02 to $49.21, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.81 to $47.805, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.81 to $48.61, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.26 to $45.23, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.26 to $46.255, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.26 to $46.43, inclusive. /s/ Thomas J. Lloyd, Attorney-in-Fact for Sytse Sijbrandij 2026-09-28