Our two largest shareholders collectively own approximately 37.6% of our common stock. According to publicly filed beneficial ownership reports, as of the respective dates of such reports, Michael Davis, chairman of our board of directors, beneficially owned 1,788,756 of shares representing a 24.8% beneficial ownership and the Rudolf Steiner Foundation ("RSF") beneficially owned 917,133 shares representing a 12.7% beneficial ownership. The shares held by RSF were originally donated by a foundation affiliated with Mr. Davis or acquired from the proceeds of donations made by that foundation. In addition, Mr. Davis and RSF filed a Schedule 13D with the SEC on March 17, 2017, announcing the formation of a "group" among the two of them and certain of Mr. Davis' affiliates under Section 13 of the Exchange Act. As part of the agreement between Mr. Davis and RSF, RSF has agreed not to sell, transfer or otherwise dispose of any of its shares in the Company unless RSF provides concurrent written notice to an affiliate of Mr. Davis and the Company at least three days prior to the consummation of any such sale, transfer or other disposition. On August 24, 2023, 424,621 shares of our common stock owned by Skywords Family Foundation, Inc. ("Skywords") was donated to Ginungagap Foundation ("Ginungagap"), a Delaware corporation, recognized as a tax-exempt organization. Mr. Davis serves as the President of both Skywords and Ginungagap and has recused himself from all matters related to the common stock owned by Ginungagap, including, without limitation, decisions to vote or dispose of Cyanotech common stock. Along with this recusal, the formation of this "group" was dissolved. In addition, on April 12, 2019, the Company borrowed $1.5 million from an entity affiliated with Mr. Davis pursuant to an unsecured promissory note. In April 2021, the Company amended the loan, which extended the maturity date to April 2024, converted $500,000 into revolving loans, adjusted the interest rate to reflect a floor of 5%, and granted a security interest in substantially all of the Company's personal property assets, subject to limited exceptions. In December 2022, the Company amended the promissory note which extended the maturity date to April 2025 and increased the revolving line amount from $0.5 million to $1.0 million. In August 2023, the Company amended the loan to increase the revolving line amount from $1.0 million to $2.0 million. In August 2024, the Company further amended the loan to increase the revolving line amount from $2.0 million to $4.0 million and extend the maturity date to April 2026. As of both March 31, 2025 and 2024, $1.0 million remained due under this promissory note, and as of March 31, 2025 and 2024, $3.0 million and $1.25 million, respectively, were outstanding on the revolving line, respectively.
Our significant stockholders, particularly if they choose to work together, may have the ability to exert significant influence over our business policies and affairs on matters submitted to our stockholders for approval, such as the election or removal of directors, amendments to our certificate of incorporation, the approval of a business combination or certain corporate financing activities. The interests of our significant stockholders could differ from those of other stockholders in ways that could be adverse to the interests of other shareholders. For example, this concentration of ownership could have the effect of delaying or preventing a change of control of our company even if such a transaction is at a premium to the prevailing market price of our common stock and is supported by other shareholders. Concentration of ownership could also harm the market price of our common stock because investors may perceive disadvantages in owning stock in a company that a substantial portion of common stock is controlled by a small number of stockholders.