# EDGAR Filing Document

**Accession Number:** 0001831840
**File Stem:** 0001140361-26-017302
**Filing Date:** 2026-4
**Character Count:** 7926
**Document Hash:** 3c6584cdcd383110ed20dd93edf6d4a0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-017302.hdr.sgml**: 20260428

**ACCESSION NUMBER**: 0001140361-26-017302

**CONFORMED SUBMISSION TYPE**: S-8 POS

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260428

**DATE AS OF CHANGE**: 20260428

**EFFECTIVENESS DATE**: 20260428

**FILER**: 

**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

**FILING VALUES:**
- **FORM TYPE:** S-8 POS
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-277749
- **FILM NUMBER:** 26903472

**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

#### As filed with the Securities and Exchange Commission on April 28, 2026

#### Registration No. 333-285504

#### Registration No. 333-277749

#### Registration No. 333-270575

#### Registration No. 333-254724

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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

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#### POST-EFFECTIVE AMENDMENT NO. 1 (No. 333-285504)

#### POST-EFFECTIVE AMENDMENT NO. 1 (No. 333-277749)

#### POST-EFFECTIVE AMENDMENT NO. 1 (No. 333-270575)

#### POST-EFFECTIVE AMENDMENT NO. 1 (No. 333-254724)

#### TO

### FORM S-8

#### REGISTRATION STATEMENT UNDER

#### THE SECURITIES ACT OF 1933

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## Semrush Holdings, Inc.
(Exact Name of Registrant as Specified in its Charter)

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| | |
|:---|:---|
| **Delaware** | **84-4053265** |
| (State or Other Jurisdiction of Incorporation or Organization) | (I.R.S. Employer Identification No.) |

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#### 800 Boylston Street, Suite 2475

#### Boston, Massachusetts
(Address of Principal Executive Offices)

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#### Semrush Holdings, Inc. Amended and Restated 2019 Stock Option and Grant Plan

#### Semrush Holdings, Inc. 2021 Stock Option and Incentive Plan

#### Semrush Holdings, Inc. 2021 Employee Stock Purchase Plan
(Full Title of the Plan)

#### Scott Kennedy

#### Vice President, Treasurer and Secretary

#### Semrush Holdings, Inc.

#### 800 Boylston Street, Suite 2475

#### Boston, MA 02199
(800) 851-9959

(Name, Address, Including Zip Code, and Telephone Number,

Including Area Code, of Agent For Service)

**Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer, " "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.**

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| | | | |
|:---|:---|:---|:---|
| **Large accelerated filer** | ☒ | **Accelerated filer** | ☐ |
| **Non-accelerated filer** | ☐ | **Smaller reporting company** | ☐ |
|  |  | **Emerging growth company** | ☐ |

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

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#### EXPLANATORY NOTE
This Post-Effective Amendment (the "Post-Effective Amendment"), filed by Semrush Holdings, Inc., a Delaware corporation (the "Registrant"), with the Securities and Exchange Commission (the "SEC"), relates to the following Registration Statements on Form S-8 (collectively, as each amended as of immediately prior to the filing of this Post-Effective Amendment, the "S-8 Registration Statements") of the Registrant:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. Registration Statement on Form S-8 (No. [333-285504](https://www.sec.gov/Archives/edgar/data/1831840/000162828025009453/semrush-formsx8.htm)), filed with the SEC on March 3, 2025, registering 7,342,154 shares of Class A
 common stock, par value $0.00001, of the Registrant under the Registrant's 2021 Stock Option and Incentive Plan;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. Registration Statement on Form S-8 (No. [333-277749](https://www.sec.gov/Archives/edgar/data/1831840/000162828024009660/semrush-formsx80372024.htm)), filed with the SEC on March 7, 2024, registering 7,205,560 shares of Class
 A common stock, par value $0.00001, of the Registrant under the Registrant's 2021 Stock Option and Incentive Plan;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. Registration Statement on Form S-8 (No. [333-270575](https://www.sec.gov/Archives/edgar/data/1831840/000162828023008127/semrush-formsx803152023.htm)), filed with the SEC on March 15, 2023, registering 3,500,000 shares of
 Class A common stock, par value $0.00001, of the Registrant under the Registrant's 2021 Stock Option and Incentive Plan; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. Registration Statement on Form S-8 (No. [333-254724](https://www.sec.gov/Archives/edgar/data/1831840/000162828021005672/semrush-formsx803252021.htm)), filed with the SEC on March 25, 2021, registering 13,503,001 shares of
 Class A common stock, par value $0.00001, of the Registrant under the Registrant's 2021 Stock Option and Incentive Plan, 3,000,667 shares of Class A common stock, par value $0.00001, of the Registrant under the Registrant's 2021 Employee
 Stock Purchase Plan, and 7,611,258 shares of Class A common stock and 7,611,258 shares of Class B common stock, each par value $0.00001, of the Registrant under the Registrant's Amended and Restated 2019 Stock Option and Grant Plan.

On November 18, 2025, the Registrant, Adobe Inc., a Delaware corporation ("Adobe"), and Fenway Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Adobe ("Merger Sub"), entered into an Agreement and Plan of Merger (the "Merger Agreement") that provides for the acquisition of the Registrant by Adobe. On April 28, 2026, pursuant to the terms of the Merger Agreement, Merger Sub merged with and into the Registrant (the "Merger"), with the Registrant surviving the Merger as a wholly owned subsidiary of Adobe.

In connection with the Merger, the Registrant has terminated any and all offerings of the Registrant's securities pursuant to existing registration statements, including the S-8 Registration Statements. In accordance with the undertakings made by the Registrant in each of the S-8 Registration Statements to remove from registration, by means of a post-effective amendment, any of the Registrant's securities that remain unsold at the termination of each such offering, the Registrant hereby removes from registration, by means of this Post-Effective Amendment, any and all securities registered under the S-8 Registration Statements that remain unsold as of the effectiveness of the Merger on April 28, 2026 and terminates the effectiveness of each of the S-8 Registration Statements.

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#### SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused these Post-Effective Amendments to be signed on its behalf by the undersigned, thereunto duly authorized, in Boston, Massachusetts on April 28, 2026.

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| | | |
|:---|:---|:---|
| **SEMRUSH HOLDINGS, INC.** | **SEMRUSH HOLDINGS, INC.** | **SEMRUSH HOLDINGS, INC.** |
| By: | /s/ Wade Sherman | /s/ Wade Sherman |
|  | Name: | Wade Sherman |
|  | Title: | President |

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No other person is required to sign these Post-Effective Amendments in reliance upon Rule 478 under the Securities Act of 1933, as amended.

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