Insider · CIK 0001409130
Kurt L. Kalbfleisch
Files at DRK (Sphere 3D Corp.). First filing Dec 12, 2024, latest Mar 13, 2026.
Kurt L. Kalbfleisch files SEC Form 4 as CFO, CEO and director at DRK (Sphere 3D Corp.). Since Dec 12, 2024, Kurt L. Kalbfleisch has reported 0 open-market buys worth $0 and 3 open-market sells worth $65k, the latest filed on Mar 13, 2026.
A track record needs three past buys with six months of prices behind them; Kurt L. Kalbfleisch has 0, so none is measured yet.
The newest scored trade: sold $16k of DRK on Mar 13, 2026, filed Mar 13, 2026, scored 23 (weak). In the last 12 months: 0 buys worth $0 and 2 sells worth $58k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
DRK: Sphere 3D Corp.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 23Weak | Sphere 3D Corp. | $16k 9,800 shares | -13% | +49% from low-85% from high | |
| 21Weak | DRKsell Sphere 3D Corp. | $42k 90,000 shares | -14% | - | |
| 15Weak | Sphere 3D Corp. | $7,883 6,000 shares | -4% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Dec 9, 2025 | DRK SPHERE 3D CORPORATION | 90,000 0.27% of outstanding | $42k | Dec 9, 2025 | none |
| Dec 11, 2024 | DRK SPHERE 3D CORPORATION | 6,000 0.03% of outstanding | $7,883 | Dec 11, 2024 | none |
Transactions
Every row this insider has filed, 23 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 2, 2026 | DRK Sphere 3D Corp. | MOption exercise Common Stock | +17,188 | $0.00 | $0 | 443,003 | 39 d ago |
| Sep 2, 2026 | DRK Sphere 3D Corp. | MOption exercise Restricted Stock Unit (RSU)derivative | -17,188 | $0.00 | $0 | 43,749 | 39 d ago |
| Mar 12, 2026 | DRK Sphere 3D Corp. | MOption exercise Common Stock | +18,358 | - | - | 74,255 | Mar 13, 2026 |
| Mar 13, 2026 | DRK Sphere 3D Corp. | SOpen-market sale Common Stock | -9,800 | $1.59 | $16k | 64,455 | Mar 13, 2026 |
| Mar 12, 2026 | DRK Sphere 3D Corp. | MOption exercise Restricted Stock Unit (RSU)derivative | -18,358 | - | - | 229,297 | Mar 13, 2026 |
| Mar 4, 2026 | DRK Sphere 3D Corp. | AGrant or award Restricted Stock Unit (RSU)derivative | +150,000 | - | - | 247,655 | Mar 6, 2026 |
| Dec 8, 2025 | DRK Sphere 3D Corp. | MOption exercise Common Stock | +183,594 | - | - | 648,964 | Dec 10, 2025 |
| Dec 9, 2025 | DRK Sphere 3D Corp. | SOpen-market sale Common Stock | -90,000 | $0.47 | $42k | 558,964 | Dec 10, 2025 |
| Dec 8, 2025 | DRK Sphere 3D Corp. | MOption exercise Restricted Stock Unit (RSU)derivative | -183,594 | - | - | 976,561 | Dec 10, 2025 |
| Sep 3, 2025 | DRK Sphere 3D Corp. | MOption exercise Common Stock | +195,201 | - | - | 550,380 | Sep 5, 2025 |
| Sep 3, 2025 | DRK Sphere 3D Corp. | FTax withholding Common Stock | -85,010 | $0.61 | $52k | 465,370 | Sep 5, 2025 |
| Sep 3, 2025 | DRK Sphere 3D Corp. | MOption exercise Restricted Stock Unit (RSU)derivative | -195,201 | - | - | 1,160,155 | Sep 5, 2025 |
| Jun 5, 2025 | DRK Sphere 3D Corp. | MOption exercise Common Stock | +339,844 | - | - | 489,585 | Jun 9, 2025 |
| Jun 5, 2025 | DRK Sphere 3D Corp. | FTax withholding Common Stock | -134,406 | $0.74 | $99k | 355,179 | Jun 9, 2025 |
| Jun 5, 2025 | DRK Sphere 3D Corp. | MOption exercise Restricted Stock Unit (RSU)derivative | -339,844 | - | - | 1,355,356 | Jun 9, 2025 |
| Apr 22, 2025 | DRK Sphere 3D Corp. | AGrant or award Restricted Stock Unit (RSU)derivative | +1,000,000 | - | - | 1,695,200 | Apr 24, 2025 |
| Mar 14, 2025 | DRK Sphere 3D Corp. | MOption exercise Common Stock | +11,719 | - | - | 153,953 | Mar 18, 2025 |
| Mar 14, 2025 | DRK Sphere 3D Corp. | FTax withholding Common Stock | -4,212 | $0.49 | $2,077 | 149,741 | Mar 18, 2025 |
| Mar 14, 2025 | DRK Sphere 3D Corp. | MOption exercise Restricted Stock Unit (RSU)derivative | -11,719 | - | - | 695,200 | Mar 18, 2025 |
| Jan 29, 2025 | DRK Sphere 3D Corp. | AGrant or award Restricted Stock Unit (RSU)derivative | +625,000 | - | - | 706,919 | Jan 31, 2025 |
| Dec 10, 2024 | DRK Sphere 3D Corp. | MOption exercise Common Stock | +11,719 | - | - | 148,234 | Dec 12, 2024 |
| Dec 10, 2024 | DRK Sphere 3D Corp. | SOpen-market sale Common Stock | -6,000 | $1.31 | $7,883 | 142,234 | Dec 12, 2024 |
| Dec 10, 2024 | DRK Sphere 3D Corp. | MOption exercise Restricted Stock Unit (RSU)derivative | -11,719 | - | - | 81,919 | Dec 12, 2024 |
Questions about Kurt L. Kalbfleisch
Answered from the filings on this page, as of the latest one.
Is Kurt L. Kalbfleisch buying or selling?
In the last 12 months Kurt L. Kalbfleisch reported 0 open-market buys worth $0 and 2 open-market sells worth $58k on SEC Form 4; the latest was sold $16k of DRK on Mar 13, 2026. Grants, option exercises and tax withholding are not counted.
How did Kurt L. Kalbfleisch's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Kurt L. Kalbfleisch has 0.
Where does Kurt L. Kalbfleisch file Form 4?
Kurt L. Kalbfleisch has filed Form 4 at DRK (Sphere 3D Corp.) as CEO and CFO. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.