Company: ANY
Filing Date: 2025-12-05
Form Type: DEFA14A
Source: 0001591956-25-000026
Chunk: 1

Company: Sphere 3D Corp.
Filing Date: 2025-12-05
Form: DEFA14A
Chunk 1
---
, you may

#### call 1-800-600-5869
or

#### Email

#### TSXTIS@TMX.COM
. Please be sure to include your Control Number (as shown above) in your Email.

<div align='center'>Your</div>

#### Vote
<div align='center'>Counts

You may enter your voting instructions at www.VoteProxyOnline.com

Using your</div>

#### Control Number
<div align='center'>above

Until 11:29 AM Eastern Time January 14, 2026</div>

#### Vote
<div align='center'>In Person at the Meeting

Visit https://Virtual-Meetings.TSXTrust.com/1862

Enter Password: sphere3d2026 (case sensitive)

Enter Your Control Number (shown above)</div>

If you are a non-registered shareholder and want to vote online at the Meeting, you must appoint yourself as proxyholder prior to proxy cut-off and register with TSX Trust in advance of the Meeting prior to proxy cut-off by emailing

#### tsxtrustproxyvoting@tmx.com
the "Request for Control Number" form which can be found here

#### https://www.tsxtrust.com/resource/en/75

#### Proposals
<div align='center'>Being Considered at the Meeting

See Proposals on the Reverse Side</div>

### THIS IS

#### NOT

### A VOTABLE BALLOT
This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side

#### to vote
these important matters.

| Voting Items                                                                                                                                                             |
| 1.To approve the warrant inducement transaction (the “Warrant Inducement Proposal”).                                                                                     |
| 2.To approve a potential name change of the Company (the “Name Change Proposal”).                                                                                        |
| 3.To approve adjournments or postponements of the Meeting or to transact such other business as may be properly brought before the Meeting (the “Adjournment Proposal”). |

#### THE BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE “

#### FOR

#### ” ALL PROPOSALS ABOVE

#### PLEASE NOTE – THIS IS NOT A PROXY CARD

### YOU CANNOT VOTE BY RETURNING THIS CARD