X0508 4 2025-12-15 0 0001831840 SEMrush Holdings, Inc. SEMR 0001974521 Mulroy Brian C/O SEMRUSH HOLDINGS, INC. 800 BOYLSTON STREET, SUITE 2475 BOSTON MA 02199 0 1 0 0 Chief Financial Officer 0 Class A Common Stock 2025-12-15 4 A 0 337268 0 A 1218536 D Class A Common Stock 2025-12-15 4 F 0 98941 11.86 D 1119595 D Class A Common Stock 2025-12-16 4 S 0 100078 11.86 D 1019517 D Consists of a grant of a restricted stock unit ("RSU") award under the Issuer's 2021 Stock Option and Incentive Plan. Each RSU represents a right to receive one share of the Issuer's Class A Common Stock upon vesting. The RSUs shall vest over a period of three years, with one-third vesting on December 15, 2026, and then in equal quarterly installments over the 24-month period thereafter. A portion of these shares represent RSUs. Each RSU represents a right to receive one share of the Issuer's Class A Common Stock upon vesting. Represents shares of Class A Common Stock withheld by the Company to satisfy tax withholding obligations in connection with the net issuance of shares of Class A Common Stock delivered to the Reporting Person on December 15, 2025, from the vesting of RSUs. The number of shares withheld by the Company to satisfy tax withholding obligations (and the net issuance) is based on the closing price of the Company's Class A Common Stock on December 15, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $11.86 to $11.88, 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 (4) to this Form 4. /s/ David Mason, as attorney-in-fact 2025-12-17