Comparable stake leader
ARMISTICE CAPITAL, LLC
SEC ownership of Sphere 3D Corp.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001591956.
Disclosed value leader
Patricia Trompeter
Comparable rows
5/27
Latest evidence
08 Jun 2026
- Public ticker
- ANY on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
ARMISTICE CAPITAL, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
5 of 27
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
ARMISTICE CAPITAL, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
08 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001591956
- Issuer location
- Stamford, CT
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Sphere 3D Corp. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
ARMISTICE CAPITAL, LLC
Disclosed value leader
Patricia Trompeter
Comparable rows
5/27
Latest evidence
08 Jun 2026
13D/G
3/4/5
13F
Lead comparable stake: 5%
22 rows are not safely comparable across share classes.
13D/G row: ARMISTICE CAPITAL, LLC
Showing 1-8 of 27 holder rows.
Quick read
ARMISTICE CAPITAL, LLC leads the comparable SEC ownership view at 5%.
5 of 27 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens ARMISTICE CAPITAL, LLC's linked filing trail.
Comparable ownership
Top 5
ARMISTICE CAPITAL, LLC
5%
Joel M. Block
28%
Sue Harnett
3.5%
Marcus Emmett Dent
2%
Nicholas R. Gates
1.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 27 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| ARMISTICE CAPITAL, LLC |
13D/G
|
5%
|
$1,302,039
1,771,482 shares
|
-$653,608 | 30 Sep 2025 |
| Joel M. Block |
3/4/5
Chief Executive Officer, Director
|
28%
|
$168,997
862,810 shares
|
— | 08 Jun 2026 |
| Sue Harnett |
3/4/5
Director
|
3.5%
|
$199,187
106,675 shares
mixed-class rows
|
— | 01 Jun 2026 |
| Marcus Emmett Dent |
3/4/5
Director
|
2%
|
$4,756
60,210 shares
|
— | 08 Jun 2026 |
| Nicholas R. Gates |
3/4/5
Director
|
1.9%
|
$3,053
56,555 shares
|
— | 08 Jun 2026 |
| Patricia Trompeter |
3/4/5
CEO, Director
|
—
mixed-class rows
|
$3,561,831
2,752,684 shares
mixed-class rows
|
— | 29 Jan 2025 |
| Kurt L. Kalbfleisch |
3/4/5
Chief Financial Officer, Director
|
—
mixed-class rows
|
$445,293
487,182 shares
mixed-class rows
|
-$57,504 | 08 Jun 2026 |
| Timothy P. Hanley |
3/4/5
Director
|
—
mixed-class rows
|
$199,187
156,675 shares
mixed-class rows
|
— | 08 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$67,566.
Buys
$0
Insiders: 0
Sells
$67,566
Insiders: 2
Net
-$67,566
Shares: -106,050
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 106,050
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 16,050 | $0 | $25,644 | -$25,644 |
| 6-9 | 0 | 90,000 | $0 | $41,922 | -$41,922 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-12 of 12 reporting-owner rows connected to Sphere 3D Corp.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
12
Largest Forms 3/4/5 holder
Patricia Trompeter
Net 12M change
-$67,567
Latest report
08 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Patricia Trompeter | CEO, Director | $3,561,831 | Mixed | 29 Jan 2025 | ||
| Kurt L. Kalbfleisch | Chief Financial Officer, Director | $445,293 | -$57,504 | -11% | Mixed | 08 Jun 2026 |
| Sue Harnett | Director | $199,187 | Mixed | 01 Jun 2026 | ||
| Timothy P. Hanley | Director | $199,187 | Mixed | 08 Jun 2026 | ||
| Joel M. Block | Chief Executive Officer, Director | $168,997 | Mixed | 08 Jun 2026 | ||
| Duncan J. McEwan | Director | $34,504 | Mixed | 01 Jun 2026 | ||
| Tiah Norton Reppas | Chief Accounting Officer | $19,938 | -$10,063 | -34% | Mixed | 08 Jun 2026 |
| Marcus Emmett Dent | Director | $4,756 | Mixed | 08 Jun 2026 | ||
| Nicholas R. Gates | Director | $3,053 | Mixed | 08 Jun 2026 | ||
| Joseph O'Daniel | President | $2,356 | Mixed | 01 Dec 2023 | ||
| David C. Danziger | Director | Mixed | 09 Jan 2024 | |||
| Vivekanand Mahadevan | Director | Mixed | 09 Jan 2024 |
Recent insider transactions for Sphere 3D Corp.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Tiah Norton Reppas | ANY | Common Shares | Award | 62.2% | 30,000 | 78,236 | 08 Jun 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Common Shares | Award | 142.2% | 250,000 | 425,815 | 08 Jun 2026 | Direct | ||
| Timothy P. Hanley | ANY | Common Shares | Award | 153.4% | 50,000 | 82,601 | 08 Jun 2026 | Direct | ||
| Nicholas R. Gates | ANY | Common Shares | Award | 762.8% | 50,000 | 56,555 | 08 Jun 2026 | Direct | ||
| Marcus Emmett Dent | ANY | Common Shares | Award | 489.7% | 50,000 | 60,210 | 08 Jun 2026 | Direct | ||
| Joel M. Block | ANY | Common Shares | Award | 137.8% | 500,000 | 862,810 | 08 Jun 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Common Shares | Tax liability | -24.5% | -57,000 | 175,815 | 01 Jun 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Common Shares | Options Exercise | 217% | 159,375 | 232,815 | 01 Jun 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Restricted Stock Unit (RSU) | Options Exercise | -72.3% | -159,375 | 60,937 | 01 Jun 2026 | Direct | ||
| Tiah Norton Reppas | ANY | Common Shares | Tax liability | -29.7% | -20,398 | 48,236 | 01 Jun 2026 | Direct | ||
| Tiah Norton Reppas | ANY | Common Shares | Options Exercise | 454.2% | 56,250 | 68,634 | 01 Jun 2026 | Direct | ||
| Tiah Norton Reppas | ANY | Restricted Stock Unit (RSU) | Options Exercise | -62.5% | -56,250 | 33,750 | 01 Jun 2026 | Direct | ||
| Duncan J. McEwan | ANY | Common Shares | Options Exercise | 74,074 | 74,074 | 01 Jun 2026 | Direct | |||
| Duncan J. McEwan | ANY | Restricted Stock Unit (RSU) | Options Exercise | -100% | -74,074 | 0 | 01 Jun 2026 | Direct | ||
| Sue Harnett | ANY | Common Shares | Options Exercise | 227.2% | 74,074 | 106,675 | 01 Jun 2026 | Direct | ||
| Sue Harnett | ANY | Restricted Stock Unit (RSU) | Options Exercise | -100% | -74,074 | 0 | 01 Jun 2026 | Direct | ||
| Timothy P. Hanley | ANY | Common Stock | Options Exercise | 63.2% | 12,630 | 32,601 | 29 May 2026 | Direct | ||
| Timothy P. Hanley | ANY | Restricted Stock Unit (RSU) | Options Exercise | -14.6% | -12,630 | 74,074 | 29 May 2026 | Direct | ||
| Sue Harnett | ANY | Common Stock | Options Exercise | 63.2% | 12,630 | 32,601 | 29 May 2026 | Direct | ||
| Sue Harnett | ANY | Restricted Stock Unit (RSU) | Options Exercise | -14.6% | -12,630 | 74,074 | 29 May 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Common Stock | Options Exercise | 13.9% | 8,985 | 73,440 | 20 May 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Restricted Stock Unit (RSU) | Options Exercise | -3.92% | -8,985 | 220,312 | 20 May 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Common Stock | Sale | -13.2% | $15,582 | $1.59 | -9,800 | 64,455 | 13 Mar 2026 | Direct |
| Tiah Norton Reppas | ANY | Common Stock | Sale | -33.5% | $10,062 | $1.61 | -6,250 | 12,384 | 12 Mar 2026 | Direct |
| Kurt L. Kalbfleisch | ANY | Common Stock | Options Exercise | 32.8% | 18,358 | 74,255 | 12 Mar 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Restricted Stock Unit (RSU) | Options Exercise | -7.41% | -18,358 | 229,297 | 12 Mar 2026 | Direct | ||
| Tiah Norton Reppas | ANY | Common Stock | Options Exercise | 681.6% | 16,250 | 18,634 | 11 Mar 2026 | Direct | ||
| Tiah Norton Reppas | ANY | Restricted Stock Unit (RSU) | Options Exercise | -15.3% | -16,250 | 90,000 | 11 Mar 2026 | Direct | ||
| Timothy P. Hanley | ANY | Restricted Stock Unit (RSU) | Award | 586.5% | 74,074 | 86,704 | 04 Mar 2026 | Direct | ||
| Duncan J. McEwan | ANY | Restricted Stock Unit (RSU) | Award | 74,074 | 74,074 | 04 Mar 2026 | Direct | |||
| Sue Harnett | ANY | Restricted Stock Unit (RSU) | Award | 586.5% | 74,074 | 86,704 | 04 Mar 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Restricted Stock Unit (RSU) | Award | 153.6% | 150,000 | 247,655 | 04 Mar 2026 | Direct | ||
| Tiah Norton Reppas | ANY | Restricted Stock Unit (RSU) | Award | 88.9% | 50,000 | 106,250 | 04 Mar 2026 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Common Stock | Sale | -13.9% | $41,922 | $0.4658 | -90,000 | 558,964 | 09 Dec 2025 | Direct |
| Kurt L. Kalbfleisch | ANY | Common Stock | Options Exercise | 39.4% | 183,594 | 648,964 | 08 Dec 2025 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Restricted Stock Unit (RSU) | Options Exercise | -15.8% | -183,594 | 976,561 | 08 Dec 2025 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Common Stock | Tax liability | -15.4% | -85,010 | 465,370 | 03 Sep 2025 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Common Stock | Options Exercise | 55% | 195,201 | 550,380 | 03 Sep 2025 | Direct | ||
| Kurt L. Kalbfleisch | ANY | Restricted Stock Unit (RSU) | Options Exercise | -14.4% | -195,201 | 1,160,155 | 03 Sep 2025 | Direct |
* marks a reported price that did not pass the local price check.