Item 5 - Additional Compensation .......................................................................................................................... 20 Item 6 - Supervision ..................................................................................................................................................... 20 Brochure Supplement (Part 2B of Form ADV) .......................................................................... 22 Officer – Richard Counts, AIF®, C(k)P® ................................................................................................................. 22 Item 2 - Educational Background and Business Experience ....................................................................... 22 Item 3 - Disciplinary Information ........................................................................................................................... 23 Item 5 - Additional Compensation .......................................................................................................................... 24 Item 6 - Supervision ..................................................................................................................................................... 24 Brochure Supplement (Part 2B of Form ADV) .......................................................................... 26 Principal Executive Officer - Nicholas “Nick” Oldham, CFP®, CRPS®, AIF®, CPFATM .......................... 26 Item 2 - Educational Background and Business Experience ....................................................................... 26 Item 3 - Disciplinary Information ........................................................................................................................... 28 Item 5 - Additional Compensation .......................................................................................................................... 29 Item 6 - Supervision ..................................................................................................................................................... 29 Firm Description Mainstreet RIA LLC (“Mainstreet”) was founded in 2019 and became a Registered Investment Advisor in 2020. Robert “Steve” Oldham, Richard Counts, and Nicholas “Nick” Oldham are all principal owners. Nick Oldham is the Chief Compliance Officer for the firm. Types of Advisory Services QUALIFIED NON-ERISA RETIREMENT PLANS Mainstreet may provide qualified plans with the following services:
• Provide discretionary and non-discretionary investment advice to the Plan Sponsor about asset classes and investment alternatives available for the Plan in accordance with the Plan’s investment policies and objectives. Investment options, retention, removal, addition of investment options and all other investment review duties will be assigned to an unaffiliated asset manager.
• Assist the Plan Sponsor in the reviewing and understanding of the investment policy statement (“IPS”). The IPS establishes the investment policies and objectives for the Plan, provided by the asset manager. Plan Sponsor shall have the ultimate responsibility to ensure the asset manager continues to follow the IPS and provides the appropriate reports and investment reviews demonstrating that the policies and objectives outlined in the IPS are being followed.
• Educate the Plan Sponsor with respect to the asset manager’s selection of a qualified default investment alternative for participants who are automatically enrolled in the Plan or who have otherwise failed to make investment elections. The Plan Sponsor retains the sole responsibility to provide all notices to the Plan participants.
• Assist the Plan Sponsor in monitoring investment options by reviewing the periodic asset manager’s investment reports that document investment performance, consistency of fund management and conformance to the guidelines set forth in the IPS, along with the asset manager’s recommendations to maintain, remove or replace investment options.
• Meet with Plan Sponsor on a periodic basis to discuss the reports and the investment recommendations provided by the asset manager.
• Assist in the education of Plan participants about general investment information and the investment alternatives available to them under the Plan. Mainstreet will not provide investment advice concerning the prudence of any investment option or combination of investment options for a particular participant or beneficiary under the Plan under this agreement. Any specific recommendations to participants will be under a separate agreement between the participant and Mainstreet.
• One-time consulting services. Mainstreet has no responsibility to provide services related to the following types of assets (“Excluded Assets”): 1. Employer securities; 2. Real estate (except for real estate funds or publicly traded REITs); 3. Stock brokerage accounts or mutual fund windows; 4. Participant loans; 5. Non-publicly traded partnership interests; 6. Other non-publicly traded securities or property (other than collective trusts and similar vehicles); or 7. Other hard-to-value or illiquid securities or property. Excluded Assets will not be included in calculation of Fees paid to Mainstreet under this Agreement. ERISA PLAN SERVICES Mainstreet provides service to qualified retirement plans including 401(k) plans, 403(b) plans, pension and profit-sharing plans, cash balance plans, and deferred compensation plans. Mainstreet may act as either a 3(21) or 3(38) advisor: Limited Scope ERISA 3(21) Fiduciary. Mainstreet may serve as a limited scope ERISA 3(21) fiduciary that can advise, help and assist plan sponsors with their investment decisions. As an investment advisor Mainstreet has a fiduciary duty to act in the best interest of the plan sponsor. The plan sponsor is still ultimately responsible for the decisions made in their plan, though using Mainstreet can help the plan sponsor delegate liability by following a diligent process. 2. Fiduciary Services are:
• Provide investment advice to the plan sponsor about asset classes and investment alternatives available for the Plan in accordance with the Plan’s investment policies and objectives. Plan sponsor will make the final decision regarding the initial selection, retention, removal and addition of investment options. Mainstreet acknowledges that it is a fiduciary as defined in ERISA section 3 (21) (A) (ii).
• Assist the plan sponsor in the development of an investment policy statement (“IPS”). The IPS establishes the investment policies and objectives for the Plan. Plan sponsor shall have the ultimate responsibility and authority to establish such policies

and objectives and to adopt and amend the IPS.
• Provide investment advice to the Plan Sponsor with respect to the selection of a qualified default investment alternative for participants who are automatically enrolled in the Plan or who have otherwise failed to make investment elections. The plan sponsor retains the sole responsibility to provide all notices to the Plan participants required under ERISA Section 404(c) (5) and 404(a)-5.
• Assist in monitoring investment options by preparing periodic investment reports that document investment performance, consistency of fund management and conformance to the guidelines set forth in the IPS and make recommendations to maintain, remove or replace investment options.
• Meet with plan sponsor on a periodic basis to discuss the reports and the investment recommendations. 3. Non-fiduciary Services are:
• Assist in the education of Plan participants about general investment information and the investment alternatives available to them under the Plan. Plan sponsor understands Mainstreet’s assistance in education of the Plan participants shall be consistent with and within the scope of the Department of Labor’s definition of investment education (Department of Labor Interpretive Bulletin 96-1). As such, Mainstreet is not providing fiduciary advice as defined by ERISA 3(21)(A)(ii) to the Plan participants. Mainstreet will not provide investment advice concerning the prudence of any investment option or combination of investment options for a particular participant or beneficiary under the Plan.
• One-time consulting services. Mainstreet may provide these services or, alternatively, may arrange for the Plan’s other providers to offer these services, as agreed upon between Mainstreet and plan sponsor. 4. Mainstreet has no responsibility to provide services related to the following types of assets (“Excluded Assets”):
• Employer securities;
• Real estate (except for real estate funds or publicly traded REITs);
• Stock brokerage accounts or mutual fund windows;
• Participant loans;
• Non-publicly traded partnership interests;
• Other non-publicly traded securities or property (other than collective trusts and similar vehicles); or
• Other hard-to-value or illiquid securities or property. Excluded Assets will not be included in calculation of Fees paid to Mainstreet on the ERISA Agreement. Specific services will be outlined in detail to each plan in the 408(b)2 disclosure. ERISA 3(38) Investment Manager. Mainstreet can also act as an ERISA 3(38) Investment Manager in which it has discretionary management and control of a given retirement plan’s assets. Mainstreet would then become solely responsible and liable for the selection, monitoring and replacement of the plan’s investment options. 1. Fiduciary Services are:
• Mainstreet has discretionary authority and will make the final decision regarding the initial selection, retention, removal and addition of investment options in accordance with the Plan’s investment policies and objectives.
• Assist the plan sponsor with the selection of a broad range of investment options consistent with ERISA Section 404(c) and the regulations thereunder.
• Assist the plan sponsor in the development of an investment policy statement (“IPS”). The IPS establishes the investment policies and objectives for the Plan.
• Provide discretionary investment advice to the Plan Sponsor with respect to the selection of a qualified default investment alternative for participants who are automatically enrolled in the Plan or who have otherwise failed to make investment elections. The plan sponsor retains the sole responsibility to provide all notices to the Plan participants required under ERISA Section 404(c) (5).
• Plan participants will have the option of choosing discretionary advisory models managed by Mainstreet; 2. Mainstreet offers plan consulting services to plan participants where Mainstreet will review the investment options available within the plan. Mainstreet will make specific fund investment recommendations to the plan participants based on the investment options available and the plan participant’s financial objectives. Non-fiduciary Services are:
• Assist in the education of Plan participants about general investment information and the investment alternatives available to them under the Plan. plan sponsor understands the Mainstreet’s assistance in education of the Plan participants shall be consistent with and within the scope of the Department of Labor’s definition of investment education (Department of Labor Interpretive Bulletin 96-1). As such, the Mainstreet is not providing fiduciary advice as defined by ERISA to the Plan participants. Mainstreet will not provide investment advice concerning the prudence of any investment option or combination of investment options for a particular participant or beneficiary under the Plan.
• One-time consulting services. Mainstreet may provide these services or, alternatively, may arrange for the Plan’s other providers to offer these services, as agreed upon between Mainstreet and plan sponsor. 3. Mainstreet has no responsibility to provide services related to the following types of assets (“Excluded Assets”):
• Employer securities;
• Real estate (except for real estate funds or publicly traded REITs);
• Stock brokerage accounts or mutual fund windows;
• Participant loans;
• Non-publicly traded partnership interests;
• Other non-publicly traded securities or property (other than collective trusts and similar vehicles); or
• Other hard-to-value or illiquid securities or property. Excluded Assets will not be included in calculation of Fees paid to the Adviser on the ERISA Agreement. Specific services will be outlined in detail to each plan in the 408(b)2 disclosure. ASSET MANAGEMENT Mainstreet offers discretionary asset management services to advisory clients. Mainstreet will offer clients ongoing asset management services through determining individual investment goals, time horizons, objectives, and risk tolerance. Investment strategies, investment selection, asset allocation, portfolio monitoring and the overall investment program will be based on the above factors. The client will authorize Mainstreet discretionary authority to execute selected investment program transactions as stated within the Investment Advisory Agreement. As part of the recommendations provided, the client may have a financial plan completed. This may include but is not limited to a thorough review of all applicable topics such as Wills, Estate Plans and Trusts, Investments, Taxes, Qualified Plans, Insurance, Retirement Income, Social Security, and College Planning. If a conflict of interest exists between the interests of Mainstreet and the interests of the client, the client is under no obligation to act upon Mainstreet’s recommendation. If the client elects to act on any of the recommendations, the client is under no obligation to affect the transaction through Mainstreet. This service will be provided at no additional cost to the client. Client Tailored Services and Client Imposed Restrictions The goals and objectives for each client are documented in our client files. Investment strategies are created that reflect the stated goals and objectives. Clients may impose restrictions on investing in certain securities or types of securities. Agreements may not be assigned without written client consent. Wrap Fee Programs Mainstreet does not sponsor any wrap fee programs. Client Assets under Management Mainstreet has the following assets under management: Discretionary Amounts: Non-discretionary Amounts: Date Calculated: $310,100,000 $0 10/10/2023 Mainstreet also had $27,900,000 in assets under advisement.