Joel Block was named Chief Executive Officer of Sphere 3D Corp., succeeding Kurt Kalbfleisch. As of November 6, 2026, Sphere 3D Corp. has reported one leadership change filing to the SEC under Item 5.02 of Form 8-K, on June 3, 2026, naming 2 appointments and 1 departure (Form 8-K, June 3, 2026).
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Key facts
- · In / out: In · Person: Kurt Kalbfleisch · Role: Director · 8-K, 2026-06-03
- · In / out: In · Person: Joel Block · Role: Chief Executive Officer · 8-K, 2026-06-03
- · In / out: Out · Person: Kurt Kalbfleisch · Role: Chief Executive Officer · 8-K, 2026-06-03
Sphere 3D Corp. reported a change among its directors and officers to the SEC on Form 8-K, Item 5.02, on 2026-06-03. It names 2 people, with 2 appointments and 1 departure. Every row below is cited to the filing it comes from, and this page adds each new change as Sphere 3D Corp. files it.
Also on the record for Sphere 3D Corp.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 6, 2026 | Stake report, Schedule 13D, by Joel Block | 7.6% of the class | 5%+ stakes | Source |
| August 26, 2026 | Stake report, Schedule 13D/A, by Endeavor Blockchain, LLC | 3.4% of the class | 5%+ stakes | Source |
| July 31, 2026 | Stake report, Schedule 13D, by Endeavor Blockchain, LLC | 6.5% of the class | 5%+ stakes | Source |
| July 20, 2026 | Stake report, Schedule 13G, by Jialin Qu | 6.2% of the class | 5%+ stakes | Source |
| July 8, 2026 | Stake report, Schedule 13G, by Thomas Masiero | 6.7% of the class | 5%+ stakes | Source |
| November 14, 2025 | Stake report, Schedule 13G/A, by Armistice Capital, LLC | 4.99% of the class | 5%+ stakes | Source |
| August 14, 2025 | Stake report, Schedule 13G/A, by Armistice Capital, LLC | 7.05% of the class | 5%+ stakes | Source |
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More on Sphere 3D Corp. and the records around it.
Sphere 3D Corp. elsewhere on the record
- 5%+ stake filings Oct 2026
- Who owns it
Companies that share a holder
- Endeavor Blockchain, LLC also filed stake reports on 1 other company: Big Digital Energy, Inc. (Sep 2026)
- Armistice Capital, LLC also filed stake reports on 120 other companies: Autolus Therapeutics plc (Aug 2026), Bicycle Therapeutics plc (Aug 2026), BioXcel Therapeutics, Inc. (Aug 2026)
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Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-06-03 | In | Director | 8-K, 2026-06-03 | ||
| 2026-06-03 | In | Chief Executive Officer | 8-K, 2026-06-03 | ||
| 2026-06-03 | Out | Chief Executive Officer | 8-K, 2026-06-03 |
Who leads Sphere 3D Corp., as last reported?
For each role that changed in the filings below, the most recent change reported. A role that did not change in these filings is not listed.
- Chief Executive Officer: Joel Block, appointed (filed 2026-06-03).
- Director: Kurt Kalbfleisch, appointed (filed 2026-06-03).
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Find candidates like Director at Sphere 3D Corp.Every change, in the filing's words
Appointed: Kurt Kalbfleisch, Director
Effective immediately following the Effective Time and as previously approved by the shareholders of Sphere, Kurt Kalbfleisch, Marcus Dent, Joel Block and Nicholas Gates have been appointed to the Sphere Board and current director of Sphere, Timothy Hanley, has been appointed Chairman.
Appointed: Joel Block, Chief Executive Officer
Joel Block, age 42, was appointed Sphere's Chief Executive Officer effective as of the Closing Date.
Departing: Kurt Kalbfleisch, Chief Executive Officer
Officer Resignations and Appointments Pursuant to the terms of the Arrangement Agreement and effective immediately following the Effective Time, Kurt Kalbfleisch resigned as Chief Executive Officer of Sphere and Joel Block was appointed Chief Executive Officer of Sphere.
- Director Resignations and Appointments Pursuant to the terms of the Arrangement Agreement and effective at the Effective Time, Duncan McEwan and Susan Harnett resigned from the board of directors of Sphere (the "Sphere Board").
- The resignations of Mr. McEwan and Ms. Harnett were not the result of any disagreement with Sphere on any matter relating to Sphere's operations, policies or practices.
- The Sphere Board has determined that each of Messrs. Dent, Gates and Hanley is independent under the applicable listing rules of The Nasdaq Stock Market LLC and the rules and regulations of the SEC.
- Following the appointment of the new directors, the composition of the standing committees of the Sphere Board is as follows: Audit Committee: Marcus Dent, Nicholas Gates and Timothy Hanley, with Mr. Hanley serving as Chair; Compensation Committee: Marcus Dent, Timothy Hanley and Nicholas Gates, with Mr. Gates serving as Chair; and Nominating and Governance Committee: Nicholas Gates, Timothy Hanley and Marcus Dent, with Mr. Dent serving as Chair.
- The Sphere Board has determined that each member of the Sphere Audit Committee satisfies the additional independence standards for audit committee members set forth in Rule 10A-3(b)(1) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and Nasdaq Rule 5605(c)(2)(A).
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.