As of September 29, 2026, the three largest insider holders of NTRB are Serguei Melnik (Chairman And President, 828.00K shares), Gareth Sheridan (Ceo, 440.42K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Serguei Melnik | Chairman And President | 827,999 | 0 | 827,999 | 65.3% | 07 Mar, 2023 |
| 2 | Gareth Sheridan | Ceo | 440,418 | 0 | 440,418 | 34.7% | 07 Jul, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 06 Mar, 2023 | Serguei Melnik | Chairman And President | Disposed G | 5,000 | $0.00 | $0 | 827,999 | Direct |
| 10 May, 2022 | Gareth Sheridan | Ceo | Acquired A | 10,000 | $13.03 | $130.29K | 443,335 | Direct |
| 15 Jun, 2022 | Gareth Sheridan | Ceo | Disposed G | 10,000 | $0.00 | $0 | 440,418 | Direct |
| 24 Feb, 2022 | Serguei Melnik | Chairman And President | Acquired P | 500 | $13.82 | $6.91K | 184,626 | Direct |
| 24 Feb, 2022 | Serguei Melnik | Chairman And President | Disposed P | 500 | $13.82 | $6.91K | 184,626 | Direct |
| 24 Feb, 2022 | Serguei Melnik | Chairman And President | Disposed P | 5,000 | $13.82 | $69.09K | 185,938 | Direct |
| 06 Feb, 2022 | Serguei Melnik | Chairman And President | Disposed G | 10,000 | $0.00 | $0 | 184,480 | Direct |
| 30 May, 2019 | Serguei Melnik | Cfo | Disposed G | 20,000 | $0.00 | $0 | 632,500 | Direct |
| 17 Aug, 2017 | Gareth Sheridan | Ceo | Disposed G | 1,000,000 | $0.00 | $4.00K | 1,500,000 | Direct |
| 19 Aug, 2017 | Serguei Melnik | Cfo | Disposed G | 450,000 | $0.00 | $1.80K | 637,500 | Direct |