Item 5: Additional Compensation ............................................................................................................................... 26 Item 6: Supervision ..................................................................................................................................................... 26 Form ADV Part 2B: Supplement Eric R. Katzman, CFA .............................................................................................................................. 28 Item 2: Educational Background and Business Experience ........................................................................................ 29 Item 3: Disciplinary Information ................................................................................................................................. 29 Item 5: Additional Compensation ............................................................................................................................... 30 Item 6: Supervision ..................................................................................................................................................... 30 INVESTMENT ADVISORY BROCHURE 5 Rockingstone Advisors LLC (“Rockingstone,” “us,” “we,” or “our”) provides portfolio management services and corporate advisory services to a variety of clients (clients and prospective clients hereafter are referred to as “clients,” “you,” or “your”). We were formed on January 5, 2009 and are organized as a Delaware limited liability company. We are an investment adviser registered with the SEC. Such registration does not imply, nor do we intend to represent, any certain level of skill, training, ability, or qualification to provide the advisory and management services as described herein or that we have been sponsored, recommended, or approved by the SEC, any state agency, or any of their respective officers. We are owned by Brandt A. Sakakeeny and his wife Margaret C. Sakakeeny. Brandt A. Sakakeeny serves as our Managing Partner, Co-Chief Investment Officer and Chief Compliance Officer (hereafter referred to as “Managing Partner”). Overview and Summary We strive to develop and manage individual portfolios to meet your long-term investment goals and objectives. We do not provide financial planning, estate planning or insurance planning services. We create custom portfolios for you that are generally invested in six principal asset classes, including Equity (stocks), Fixed Income (bonds), Hybrids (preferred stock and convertible bonds), Alternatives (commodities, real estate), Digital Assets (cryptocurrencies, tokens) and Cash. Within each asset class we invest in a variety of domestic and foreign public and private securities and/or digital assets, including but not limited to, common stocks, preferred stocks, bonds (government, corporate, asset-backed, and municipal), convertible bonds, exchange-traded funds, and notes (respectively, “ETFs” and “ETNs”), real estate investment trusts (“REITs”), master limited partnerships (“MLPs”), mutual funds, warrants, money market funds, options, cryptocurrencies, tokens and coins (cryptocurrencies, tokens and coins are collectively referred to herein as “digital assets”). We may also “sell short” securities or digital assets, which is a strategy designed to benefit from a decline

in the price or value of a security or a digital asset. These portfolios are invested and managed by us through discretion granted to us by you to manage your portfolio in a manner consistent with your long-term goals and objectives (See Item 16: Investment Discretion for more information). In a few circumstances, we may also manage portfolios on a non-discretionary basis, whereby we will obtain your authorization before trades are submitted on your behalf. If clients elect to invest in digital assets, then clients are also invested in digital assets based on their investment risk and financial parameters. Rockingstone historically offered digital assets to its clients via Fidelity or Gemini Trust Company, LLC (“Fidelity”, “Gemini” or “Digital Asset Custodian”), U.S. Department of Treasury Financial Crimes Enforcement Networks (“FinCEN”). However, effective December 31, 2023, Gemini no longer offers custodial services to institutional investors. As a result, Rockingstone is in the process of transferring custody of digital assets to Fidelity Brokerage Services. Rockingstone will buy, sell and trade in digital assets via Gemini and/or Fidelity, at clients’ election, and provide instructions in furtherance of such discretionary authority, via Gemini or Fidelity. Consequently, when purchasing digital assets on behalf of clients, Rockingstone is limited to digital assets supported by Gemini or Fidelity. In general, the customary type of restrictions clients may impose on their portfolios is the degree of risk and the amount of assets in the client account(s). Clients generally cannot select specific securities or digital assets or restrict the purchase of specific securities or digital assets, unless communicated to us in writing or the account is a non-discretionary account. We do not take possession of your securities or digital assets; rather, we typically recommend that you establish a brokerage account with a specific custodian (the “Recommended Custodian”), normally a registered broker-dealer, Member SIPC/NYSE, or we may agree to manage an account maintained with a custodian that you have selected (the “Directed Custodian,” and hereafter together referred to as the “Custodian”). Likewise, if clients elect to invest in digital assets, then clients must also open an account with Digital Asset Custodian (“digital asset account”) and provide discretionary authority over that account to Rockingstone. Similar to Rockingstone’s relationship with Recommended Custodian with respect to brokerage activities, digital asset accounts, agreements, and transaction processing will be conducted through Digital Asset Custodian. Digital Asset Custodian will buy and sell supported digital assets (“digital asset transactions”), and store digital assets acquired by clients. The investments in each client’s digital asset account are held in a separate account in the name of the client at Digital Asset Custodian, and not with Rockingstone. Your securities and digital assets will be maintained with the Custodian and Digital Asset Custodian respectively and as applicable, and we will provide instructions to Custodian and Digital Account Custodian, as applicable, to buy, sell, and trade securities and/or digital assets for your account(s) (See Item 15: Custody for more information). As of December 31st, 2023, we had $259,610,162 in regulatory assets under management on a discretionary basis and $11,015,446 in regulatory assets under management on a non-discretionary basis, for total regulatory assets under management of $270,625,608.