# EDGAR Filing Document

**Accession Number:** 0001744907
**File Stem:** 0000950103-26-006323
**Filing Date:** 2026-4
**Character Count:** 8123
**Document Hash:** 730c5d2d0144c04afc02bfd52d9aa337
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950103-26-006323.hdr.sgml**: 20260428

**ACCESSION NUMBER**: 0000950103-26-006323

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260428

**FILED AS OF DATE**: 20260428

**DATE AS OF CHANGE**: 20260428

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Mason David W
- **CENTRAL INDEX KEY:** 0001744907

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40276
- **FILM NUMBER:** 26910047

**MAIL ADDRESS:**
- **STREET 1:** 800 BOYLSTON STREET, SUITE 2475
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SEMrush Holdings, Inc.
- **CENTRAL INDEX KEY:** 0001831840
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 844053265
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 800 BOYLSTON STREET, SUITE 2475
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
- **BUSINESS PHONE:** 800-851-9959

**MAIL ADDRESS:**
- **STREET 1:** 800 BOYLSTON STREET, SUITE 2475
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[x] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Mason David W<br><sub>(Last) (First) (Middle)</sub><br>C/O SEMRUSH HOLDINGS, INC.<br>800 BOYLSTON STREET, SUITE 2475<br><sub>(Street)</sub><br>BOSTON, MA 02199<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-04-28 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Legal Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>SEMrush Holdings, Inc. [ SEMR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A Common Stock | 2026-04-28 |  | D |  | 271248<sup>(1)(2)(3)(4)</sup> | D | 12.00<sup>(3)</sup> | 0 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Stock Option (Right to Buy) | $11.91 | 2026-04-28 |  | D |  |  | 144717 | <sup>(5)</sup> | 2032-11-01 | Class A Common Stock | 144717 | <sup>(5)</sup> | 0 | D |  |

---

### Footnotes:

(1) A portion of these shares represent restricted stock units ("RSUs"). Each RSU represents a right to receive one share of the Issuer's common stock ("Common Stock") upon vesting.

(2) On April 28, 2026, pursuant to the terms of that certain Agreement and Plan of Merger (the "Merger Agreement"), dated as of November 18, 2025, by and among Semrush Holdings, Inc., a Delaware corporation (the "Issuer"), Adobe Inc., a Delaware corporation ("Parent"), and Fenway Merger Sub, Inc., a Delaware corporation and a direct, wholly owned subsidiary of Parent ("Merger Sub"), Merger Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving the Merger as a wholly owned subsidiary of Parent.

(3) At the effective time of the Merger (the "Effective Time"), each share of Common Stock held by the reporting person was converted into the right to receive $12.00 in cash (the "Merger Consideration").

(4) At the Effective Time, each RSU award that was subject solely to service-based vesting requirements ("RSU Award") held by a non-employee director, contractors or other certain service providers (each, a "Specified Individual") was cancelled and cashed out for a payment equal to the Merger Consideration in respect of each underlying share and each other RSU award was converted into a restricted stock unit award relating to Parent common stock (an "Adobe RSU Award") in respect of a number of shares of Parent common stock obtained by multiplying the number of shares of Common Stock underlying the RSU Award by the quotient of (a) the Merger Consideration divided by (b) the closing price per share of Adobe common stock over the 30 consecutive calendar days ending on (and including) the second to last calendar day preceding the closing date (the "Adobe Trading Price").

(5) At the Effective Time, each option to purchase shares of Common Stock ("Option") that is vested or is held by a Specified Individual was cancelled and cashed out for a payment equal to the excess of the Merger Consideration over the exercise price of such Option in respect of each underlying share and each unvested Option that is not held by a Specified Individual was converted into an Adobe RSU Award in respect of a number of shares of Parent common stock obtained by dividing the spread value of the Option by the Adobe Trading Price. Options with an exercise price equal to or greater than the Merger Consideration were cancelled for no consideration.

**Signature:** /s/ David Mason  
**Date:** 2026-04-28

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**