# EDGAR Filing Document

**Accession Number:** 0002090646
**File Stem:** 0001493152-26-024004
**Filing Date:** 2026-5
**Character Count:** 11386
**Document Hash:** 570e48e537d56fe63f1f77640fdf0389
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-26-024004.hdr.sgml**: 20260515

**ACCESSION NUMBER**: 0001493152-26-024004

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260515

**DATE AS OF CHANGE**: 20260515

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Boost Run Inc.
- **CENTRAL INDEX KEY:** 0002090646
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-95711
- **FILM NUMBER:** 26990543

**BUSINESS ADDRESS:**
- **STREET 1:** 5 REVERE DRIVE, SUITE 200
- **CITY:** NORTHBROOK
- **STATE:** IL
- **ZIP:** 60062
- **BUSINESS PHONE:** 847-812-3764

**MAIL ADDRESS:**
- **STREET 1:** 5 REVERE DRIVE, SUITE 200
- **CITY:** NORTHBROOK
- **STATE:** IL
- **ZIP:** 60062
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Georgakopoulos Harilaos
- **CENTRAL INDEX KEY:** 0002130097

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**MAIL ADDRESS:**
- **STREET 1:** 5 REVERE DRIVE, SUITE 200
- **CITY:** NORTHBROOK
- **STATE:** IL
- **ZIP:** 60062

## Exhibit 99.3

**Exhibit 99.3**

**JOINT FILING AGREEMENT**

In accordance with Rule 13d-1(k) under the Securities and Exchange Act of 1934, as amended, the persons and entities named below agree to the joint filing on behalf of each of them of the foregoing Schedule 13D with respect to the Class A Common Stock, par value $0.0001 per share, of Boost Run Inc., and that all subsequent amendments to such Schedule 13D shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned hereby further agree that this joint filing agreement be included as an exhibit to such Schedule 13D and that this joint filing agreement may be executed in any number of physical or electronically signed counterparts, each of which when so executed shall be deemed to be an original, but all of which counterparts shall together constitute one and the same instrument. In evidence thereof, the undersigned, being duly authorized, have executed this joint filing agreement as of May 15, 2026.

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date set forth below.

---

| | | |
|:---|:---|:---|
| Date: May 15, 2026 | /s/ Harilaos Georgakopoulos | /s/ Harilaos Georgakopoulos |
|  | Harilaos Georgakopoulos | Harilaos Georgakopoulos |
|  | A23 Revocable Trust No.1, Dated January 26, 2026 | A23 Revocable Trust No.1, Dated January 26, 2026 |
|  | By: | /s/ Harilaos Georgakopoulos |
|  |  | Name: Harilaos Georgakopoulos |
|  |  | Title: Trustee |

---

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**Boost Run Inc.**

*(Name of Issuer)*

**Class A Common Stock, par value $0.0001 per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Harilaos Georgakopoulos**<br>c/o Boost Run Inc.<br>5 Revere Drive, Suite 200<br>Northbrook IL 60062<br>(847) 489-3367

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**05/08/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Harilaos Georgakopoulos** | Name of reporting person<br>**Harilaos Georgakopoulos** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**8016095.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**8016095.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**8016095.00** | Aggregate amount beneficially owned by each reporting person<br>**8016095.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.13%** | Percent of class represented by amount in Row (11)<br>**25.13%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**A23 Revocable Trust No.1, Dated January 26, 2026** | Name of reporting person<br>**A23 Revocable Trust No.1, Dated January 26, 2026** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**8016095.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**8016095.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**8016095.00** | Aggregate amount beneficially owned by each reporting person<br>**8016095.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.13%** | Percent of class represented by amount in Row (11)<br>**25.13%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Class A Common Stock, par value $0.0001 per share

**(b) Name of Issuer:**
Boost Run Inc.

**(c) Address of Issuer's Principal Executive Offices:**
5 Revere Drive, Suite 200, NORTHBROOK, IL, 60062

**Item 4. Purpose of Transaction**

The information regarding the Business Combination set forth in Item 3 above is incorporated into this Item 4 by reference. Harilaos Georgakopoulos serves a member of the Board of Directors and as the Chief Operating Officer of the Issuer, and, in such capacity, may have influence over the corporate activities of the Issuer, including activities which may relate to items described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. Except as described in this Schedule 13D, the Reporting Persons do not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, subject to the agreements described herein, the Reporting Persons, at any time, and from time to time, may review, reconsider and change their position and/or change their purpose and/or develop such plans and may seek to influence management of the Issuer or the Board with respect to the business and affairs of the Issuer and may from time to time consider pursuing or proposing such matters with advisors, the Issuer, or other persons.

**Item 5. Interest in Securities of the Issuer**

**(a)**
See responses to Item 13 on the cover page.

**(b)**
See responses to Items 7, 8, 9 and 10 on the cover page.

**(c)**
Except as set forth in this Schedule 13D, the Reporting Person has not, to the best of his knowledge, engaged in any transaction with respect to the common stock during the sixty days prior to the date of filing this Schedule 13D.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Lock-Up Agreement

In connection with the Business Combination, on September 15, 2025, the Company entered into Lock-Up Agreements (the "Lock-Up Agreements") with certain stockholders of Legacy Boost Run, pursuant to which each of the parties to the Lock-Up Agreements agreed not to effect any sale or distribution of any equity securities of Pubco held by any of them during the lock-up period set forth therein.

The foregoing description of the Lock-Up Agreement is qualified in its entirety by reference to the full text of the agreement, a copy of which is attached as Exhibit 99.1 to this Schedule 13D and is incorporated herein by reference.

Registration Rights Agreement

In connection with the Business Combination, on the Closing Date, the Company entered into an Amended and Restated Registration Rights Agreement (the "Registration Rights Agreement") pursuant to which it agreed to register for resale shares of the Issuer's Common Stock and other securities held by the certain stockholders, subject to the terms and conditions described therein.

The foregoing description of the Registration Rights Agreement is qualified in its entirety by reference to the full text of the agreement, a copy of which is attached as Exhibit 99.2 to this Schedule 13D and is incorporated herein by reference.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Harilaos Georgakopoulos

**Signature:** /s/ Harilaos Georgakopoulos

**Name/Title:** Harilaos Georgakopoulos

**Date:** 05/15/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** A23 Revocable Trust No.1, Dated January 26, 2026

**Signature:** By /s/ Harilaos Georgakopoulos, Trustee

**Name/Title:** Harilaos Georgakopoulos

**Date:** 05/15/2026