| Item 1. | Security and Issuer |
| (a) | Title of Class of Securities:
Common Shares, no par value |
| (b) | Name of Issuer:
Sphere 3D Corp. |
| (c) | Address of Issuer's Principal Executive Offices:
243 Tresser Blvd., 17th Floor, Stamford,
CONNECTICUT
, 06901. |
| Item 2. | Identity and Background |
|
| (a) | This statement is filed by Endeavor Blockchain, LLC, an Arkansas limited liability company ("Endeavor Blockchain"), with respect to the Shares directly and beneficially owned by it, which are indirectly owned by Joshua Kilgore ("Mr. Kilgore") as the Managing Member of Endeavor Blockchain. Each of the foregoing is referred to as a "Reporting Person" and collectively as the "Reporting Persons." |
| (b) | The principal business address for Endeavor Blockchain and Mr. Kilgore is 5701 Euper Lane, Suite A, Fort Smith, Arkansas 72903. |
| (c) | The principal business of Endeavor Blockchain is to invest in businesses that own and operate Digital Asset mining infrastructure, and AI/High Performance computer assets. The principal business of Mr. Kilgore is serving as the managing member of Endeavor Blockchain. |
| (d) | No Reporting Person has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). |
| (e) | No Reporting Person has, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction, and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. |
| (f) | Endeavor Blockchain is organized under the laws of the State of Arkansas. Mr. Kilgore is a citizen of the United States of America. |
| Item 3. | Source and Amount of Funds or Other Consideration |
| | The common shares (the "Shares") of Sphere 3D Corp. (the "Issuer") purchased by Endeavor Blockchain were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases. The aggregate purchase price of the 500,000 Shares initially purchased by Endeavor Blockchain was approximately $988,384, excluding brokerage commissions. |
| Item 4. | Purpose of Transaction |
| | The Reporting Persons purchased the Shares based on the Reporting Person's belief that when purchased, the Shares were undervalued and represented an attractive investment opportunity. Depending upon overall market conditions other investment opportunities available to the Reporting Persons, and the availability of Shares at prices that would make the purchase or sale of Shares desirable, the Reporting Persons may endeavor to increase or decrease their position in the Issuer through, among other things, the purchase or sale of Shares on the open market or in private transactions or otherwise, on such terms and at such times as the Reporting Persons may deem advisable. The Reporting Persons intend to engage with the Issuer's management and Board of Directors regarding opportunities for value creation. |
| Item 5. | Interest in Securities of the Issuer |
| (a) | Item 5(a) is hereby amended and restated as follows: The aggregate percentage of Shares reported owned by each Reporting Person named herein is based on 8,704,816 Shares outstanding as of August 11, 2026, which is the total number of Shares outstanding as reported in the Issuer's quarterly report on Form 10Q filed with the Securities and Exchange Commission on August 14, 2026. See Rows (11) and (13) of the cover pages to this Schedule 13D amendment for the aggregate number of shares and percentage of the Shares beneficially owned by each of the Reporting Persons. The filing of this Schedule 13D amendment shall not be deemed an admission that the Reporting Persons are, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, the beneficial owners of any securities of the Issuer that he or it does not own directly or through a wholly-owned entity. Each of the Reporting Persons specifically disclaims beneficial ownership of the securities reported herein that he or it does not own directly or through a wholly-owned entity. The Reporting Persons own an aggregate of 300,000 Shares, representing 3.4% of the Shares outstanding as of August 11, 2026. |
| (b) | See rows (7) through (10) of the cover pages to this Schedule 13D for the number of Shares as to which each Reporting Person has the sole or shared power to vote or direct the vote and the sole or shared power to dispose or to direct the disposition. |
| (c) | Item 5(c) is hereby amended and restated as follows: On August 24, 2026, the Reporting Person sold 200,000 Shares in the open market, in the ordinary course of business. |
| (d) | Not applicable |
| (e) | Not applicable |
| Item 6. | Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer |
| | None |
| Item 7. | Material to be Filed as Exhibits. |
| | None |
