Sec Form 3 Filing - Reppas Tiah Norton @ Sphere 3D Corp. - 2025-12-17

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Reppas Tiah Norton 2. Issuer Name and Ticker or Trading Symbol Sphere 3D Corp. [ ANY] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Accounting Officer (Last) (First) (Middle) FIRST EXECUTIVE SUITES, 100 E SAN MARCOS, SUITE 400 3. Date of Earliest Transaction (MM/DD/YY) 12/17/2025 (Street) SAN MARCOS, CA92069 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 23,832 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units ( ( 2 ) ( 1 ) ( 1 ) Common Stock 562,500 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Reppas Tiah Norton FIRST EXECUTIVE SUITES, 100 E SAN MARCOS SUITE 400 SAN MARCOS, CA92069 Chief Accounting Officer Signatures Denise Garrett For: Tiah Reppas 12/22/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The common shares reported under column 3 comprise two RSU awards. The outstanding RSUs under each award and their underlying vesting schedules are as follows: (i) 62,500 RSUs which vest 12,500 shares quarterly beginning 3/1/2026 until 3/1/2027; and 500,000 RSUs which vest 150,000 shares on 3/1/2026 and 50,000 shares vest quarterly beginning June 1, 2026 until December 1, 2027. ( 2 )Each restricted stock unit represents a contingent right to receive one share of Sphere 3D Corp. common stock.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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