As of April 25, 2026, the three largest insider holders of SMTK are Simon P. King (Director, 7.48Mn shares), Joseph Christopher Lizzio (TenPercentOwner, 419.00K shares), Boer Klaas De (Director, 11.43K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Simon P. King | - | 0 | 7,476,028 | 27 Jan, 2022 |
| Joseph Christopher Lizzio | - | 419,000 | 0 | 25 Sep, 2025 |
| Boer Klaas De | - | 0 | 11,430 | 05 Jun, 2024 |
| Ian Jenks | Chairman And Ceo | 10,511 | 0 | 13 Feb, 2024 |
| Simon Ogier | Chief Technology Officer | 5,760 | 0 | 02 Feb, 2024 |
| Steven Denbaars | - | 815 | 0 | 02 Feb, 2024 |
| Barbra Keck | Chief Financial Officer | 100 | 0 | 02 Feb, 2024 |
| Melisa Denis | - | 100 | 0 | 02 Feb, 2024 |
| Sriram Krishnamurthy Peruvemba | - | 100 | 0 | 02 Feb, 2024 |
| Boer Klaas De | - | 100 | 0 | 02 Feb, 2024 |
| Beverley Brown | Chief Scientist | 100 | 0 | 02 Feb, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 10 Sep, 2025 | Joseph Christopher Lizzio | Common Stock | D | 150,000 | $0.00 | 419,000 | D | G |
| 03 Sep, 2025 | Steven Denbaars | Stock Option (right to buy) | A | 22,466 | $0.00 | 22,466 | D | A |
| 03 Sep, 2025 | Barbra Keck | Stock Option (right to buy) | A | 71,077 | $0.00 | 71,077 | D | A |
| 03 Sep, 2025 | Boer Klaas De | Stock Option (right to buy) | A | 22,466 | $0.00 | 22,466 | D | A |
| 03 Sep, 2025 | Melisa Denis | Stock Option (right to buy) | A | 22,466 | $0.00 | 22,466 | D | A |
| 03 Sep, 2025 | Sriram Krishnamurthy Peruvemba | Stock Option (right to buy) | A | 22,466 | $0.00 | 22,466 | D | A |
| 03 Sep, 2025 | Ian Jenks | Stock Option (right to buy) | A | 160,005 | $0.00 | 160,005 | D | A |
| 28 May, 2025 | Jonathan Watkins | Stock Option (right to Buy) | A | 131,745 | $0.00 | 131,745 | D | A |
| 28 May, 2025 | Melisa Denis | Stock Option (right to Buy) | A | 23,915 | $0.00 | 23,915 | D | A |
| 28 May, 2025 | Boer Klaas De | Stock Option (right to Buy) | A | 23,915 | $0.00 | 23,915 | D | A |
| 28 May, 2025 | Beverley Brown | Stock Option (right to Buy) | A | 33,741 | $0.00 | 33,741 | D | A |
| 28 May, 2025 | Sriram Krishnamurthy Peruvemba | Stock Option (right to Buy) | A | 23,915 | $0.00 | 23,915 | D | A |
| 28 May, 2025 | Simon Ogier | Stock Option (right to Buy) | A | 77,656 | $0.00 | 77,656 | D | A |
| 28 May, 2025 | Barbra Keck | Stock Option (right to Buy) | A | 75,660 | $0.00 | 75,660 | D | A |
| 28 May, 2025 | Ian Jenks | Stock Option (right to Buy) | A | 170,320 | $0.00 | 170,320 | D | A |
| 28 May, 2025 | Steven Denbaars | Stock Option (right to Buy) | A | 23,915 | $0.00 | 23,915 | D | A |
| 14 Jun, 2024 | Simon Ogier | Employee stock option (Right to Buy) | A | 49,000 | $0.00 | 49,000 | D | A |
| 14 Jun, 2024 | Beverley Brown | Employee stock option (Right to Buy) | A | 49,000 | $0.00 | 49,000 | D | A |
| 14 Jun, 2024 | Barbra Keck | Employee stock option (Right to Buy) | A | 100,000 | $0.00 | 100,000 | D | A |
| 14 Jun, 2024 | Sriram Krishnamurthy Peruvemba | Employee stock option (Right to Buy) | A | 20,000 | $0.00 | 20,000 | D | A |