X0609 4 2026-10-13 0 0001846069 Nextdoor Holdings, Inc. NXDR 0002083093 How Antoinette false C/O NEXTDOOR HOLDINGS, INC. 420 TAYLOR STREET SAN FRANCISCO CA 94102 0 1 0 0 Chief Accounting Officer 1 Class A Common Stock 2026-10-13 4 C 0 10800 0 A 10800 D Class A Common Stock 2026-10-13 4 S 0 10800 2.7203 D 0 D Stock Option (Right to Buy) 2.41 2026-10-13 4 M 0 10800 0 D 2031-03-23 Class B Common Stock 10800 40186 D Class B Common Stock 2026-10-13 4 M 0 10800 0 A Class A Common Stock 10800 10800 D Class B Common Stock 2026-10-13 4 C 0 10800 0 D Class A Common Stock 10800 0 D This transaction was entered into pursuant to and in accordance with the requirements of Rule 10b5-1 under the Securities Exchange Act of 1934, as amended, under a plan adopted by the Reporting Person on June 3, 2026. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.72 to $2.7250 per share, 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 within the range set forth in this footnote. The stock option award is fully vested and exercisable. Each share of Class B Common Stock is convertible into one share of Class A Common Stock of the Issuer at the election of the holder any time; provided; however, that each share of Class B Common Stock shall automatically be converted into Class A Common Stock on a one-for-one basis on the earlier of the: (i) tenth anniversary of the completion of the Business Combination or (ii) date specified by the affirmative vote of the holders of two-thirds of the Class B Common Stock then outstanding. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon any transfer, whether or not for value (subject to certain exceptions). /s/ Sophia Contreras Schwartz, as Attorney-in-Fact for Reporting Person 2026-10-15