X0508 4 2025-12-08 0 0001831840 SEMrush Holdings, Inc. SEMR 0001884375 Warden Andrew C/O SEMRUSH HOLDINGS, INC. 800 BOYLSTON STREET, SUITE 2475 BOSTON MA 02199 0 1 0 0 Chief Marketing Officer 0 Class A Common Stock 2025-12-08 4 M 0 84585 9.78 A 437199 D Class A Common Stock 2025-12-08 4 S 0 196115.11 11.84 D 241083.89 D Employee Stock Option (Right to Buy) 9.78 2025-12-08 4 M 0 84585 0 D 2033-04-21 Class A Common Stock 84585 42803 D A portion of these shares represent restricted stock units ("RSUs"). Each RSU represents a right to receive one share of the Issuer's Class A Common Stock upon vesting. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $11.84 to $11.85, 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 within the ranges set forth in this footnote (2) to this Form 4. As of December 1, 2025, 84,585 shares underlying this stock option were vested and available for exercise. This stock option was granted on April 21, 2023 and is subject to following vesting schedule: 25% of the stock option shall vest on the twelve (12) month anniversary of April 1, 2023, and the remainder shall vest in monthly installments over a 36-month period thereafter, at a rate of 2.07% of such options each month for the first 35 months and 2.5% of such options for the 36th month, subject to the Reporting Person's continuous employment with the Issuer on each such date. /s/ David Mason, as attorney-in-fact 2025-12-10