Terms and Conditions

Stone Engineering Equity Group | Effective Date: February 26, 2026

Your use of the Stone Engineering Equity Group website and investor portal (collectively, the "Website") is governed by the following terms and conditions ("Terms of Use"). Stone Engineering Equity Group ("Stone EG," "we," "us," "our") is a Special Purpose Vehicle (SPV) formed for the sole purpose of raising capital to make a single investment in OK Stone Engineering Inc. (the "Company"). By clicking "Invest Now" and accessing the investment portal, you acknowledge that you have been provided access to the Private Placement Memorandum (PPM), the Subscription Agreement, and the SPV's Operating Agreement. These Terms, along with our Privacy Policy, govern your use of the Website and your participation in this specific investment offering.

Section 01

Nature of the Offering & Important Disclaimers

Stone EG is a private investment vehicle. It is not a broker-dealer, placement agent, or financial advisor. The sole purpose of Stone EG is to facilitate investment into OK Stone Engineering Inc. The following limitations apply:

Single-Purpose Vehicle. Stone EG will not invest in any other company, asset, or security besides the equity of OK Stone Engineering Inc. All capital raised will be deployed for this single, stated purpose as outlined in the PPM.

Not a Personal Financial Advisor. Stone EG does not provide personal financial, tax, or legal advice. All content on the Website is for informational purposes only and does not constitute a recommendation to invest.

No Guaranteed Results. The success of an investment in Stone EG is entirely dependent on the performance of OK Stone Engineering Inc. All users are responsible for making their own investment decisions.

Section 02

User Registration & Investor Qualification

Eligibility. Only real persons at or above the age of 18 may register. All information you provide must be truthful and accurate. By registering, you represent and warrant that you are an "Accredited Investor" as defined in Rule 501 of Regulation D under the Securities Act of 1933.

Accredited Investor Verification. Because this offering is conducted under Rule 506(c), we are required by law to take reasonable steps to verify your accredited investor status. This verification may be performed by a third-party service or require a written confirmation from a qualified professional (such as a CPA, attorney, or registered investment adviser). You agree to provide any information or documentation necessary to complete this verification process. Self-certification alone is not sufficient.

Section 03

Investment Documents & Subscription

By clicking "Invest Now" and proceeding to the investment portal, you acknowledge and agree to the following:

Access to Documents. You have been granted access to the complete and final versions of the Private Placement Memorandum (PPM), the Subscription Agreement, and the Stone EG Operating Agreement. You agree to review these documents in their entirety before making an investment decision.

Binding Agreement. The Subscription Agreement is the legally binding contract that governs your investment. By executing the Subscription Agreement, you are formally representing that you have read the PPM, understand the risks involved, and meet the required qualifications to invest.

Section 04

Investment Risk Disclosures

An investment in Stone EG is speculative and involves a high degree of risk, including the potential for a total loss of your invested capital. The following risks are material to this offering:

Past performance of OK Stone Engineering Inc. is no guarantee of future results. Any financial projections, including the 2029 NASDAQ IPO target and 3-5X return, are forward-looking statements and may not reflect actual future performance.

All investments involve risk and may result in partial or total loss of capital. There can be no assurance that OK Stone Engineering Inc. will achieve its stated objectives or that the targeted returns will be met.

The information presented regarding the offering constitutes a summary only and is qualified in its entirety by the disclosure contained in the offering's PPM. Key risks include, but are not limited to:

Concentration Risk: Stone EG is 100% concentrated in a single, non-public company: OK Stone Engineering Inc. A decline in the performance or valuation of the Company will directly and adversely affect your investment. There is no diversification.

Illiquidity Risk: Your interest in Stone EG is highly illiquid. There is no secondary market for these securities, and you should be prepared to hold your investment for the full projected hold period (e.g., until a 2029 liquidity event).

Execution & Market Risk: The ability of OK Stone Engineering Inc. to achieve its revenue goals and the 2029 NASDAQ IPO is subject to significant business, economic, and market risks that are outside of its control.

Section 05

Regulatory Compliance

Regulation D Offering. The offering of interests in Stone EG is conducted pursuant to an exemption from SEC registration under Rule 506(c) of the Securities Act of 1933. This permits general solicitation, but requires that all investors are verified accredited investors.

SEC Form D Filing. Stone EG will file a notice on Form D with the U.S. Securities and Exchange Commission (SEC) within 15 days of the first sale of securities, as required by law.

State Blue Sky Filings. Stone EG will make all required notice filings in the states where its investors reside. However, this offering has not been registered or qualified in any state, and no state securities commission has reviewed or approved this offering.

AML/KYC. We are required to comply with Anti-Money Laundering (AML) and Know Your Customer (KYC) regulations. As a condition of investment, all investors must complete identity verification procedures.

Section 06

Disclaimers & Limitation of Liability

THE WEBSITE AND ITS CONTENT ARE PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS. USE OF THE WEBSITE IS SOLELY AT YOUR OWN RISK. STONE EG EXPRESSLY EXCLUDES ALL REPRESENTATIONS AND WARRANTIES, EXPRESS OR IMPLIED.

STONE EG SHALL HAVE NO LIABILITY FOR DAMAGES ARISING OUT OF OR IN CONNECTION WITH YOUR USE OF THE WEBSITE, INCLUDING LOSS OF MONEY OR INABILITY TO CONCLUDE AN INVESTMENT.

UNDER NO CIRCUMSTANCES WILL STONE EG OR ITS AFFILIATES BE LIABLE FOR ANY DAMAGES OF ANY KIND ARISING FROM YOUR USE OF THE WEBSITE OR YOUR INVESTMENT IN THE OFFERING.

Section 07

General Provisions

Choice of Law. The laws of the State of Delaware govern these Terms. Venue for any dispute shall be in Delaware.

Waiver & Severability. Failure of Stone EG to enforce any provision shall not constitute a waiver. If any Term is deemed invalid, the remaining Terms will continue to apply.

Questions or Concerns?

If you have any questions about these Terms and Conditions, please contact us at:

Stone Engineering Equity Group, LLC

2443 Impala Drive, Carlsbad, CA 92010

[email protected] | stoneeg.com

This document constitutes the official Terms and Conditions for the investment offering in OK Stone Engineering Inc. through the Stone Engineering Equity Group SPV.

This offering is made pursuant to an exemption from registration under Rule 506(c) of the Securities Act of 1933, as amended. A Form D will be filed with the SEC.