STXS's three largest insider shareholders as of April 28, 2026 are Paul J Isaac (Director, 2.88Mn shares), Paul J Isaac (Director, 2.77Mn shares), Arun Swarup Menawat (Director, 992.46K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Paul J Isaac | - | 97,299 | 2,786,557 | 18 Nov, 2025 |
| Paul J Isaac | - | 0 | 2,766,557 | 10 Mar, 2025 |
| Arun Swarup Menawat | - | 992,457 | 0 | 02 Jan, 2026 |
| Nathan Fischel | - | 677,672 | 0 | 02 Jan, 2026 |
| Ross B Levin | - | 578,145 | 0 | 02 Jan, 2026 |
| Robert J Messey | - | 518,402 | 0 | 02 Jan, 2024 |
| David Benfer | - | 515,872 | 0 | 02 Jan, 2026 |
| Myriam Curet | - | 392,058 | 0 | 02 Jan, 2026 |
| Nachum Shamir | - | 136,224 | 0 | 02 Jan, 2026 |
| Paul J Isaac | - | 87,299 | 0 | 11 Mar, 2025 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 11 Apr, 2026 | Kimberly R. Peery | Stock Options -Right to Buy | A | 40,000 | $0.00 | 340,750 | D | A |
| 02 Jan, 2026 | Arun Swarup Menawat | Common Stock | A | 46,948 | $0.00 | 992,457 | D | A |
| 02 Jan, 2026 | Myriam Curet | Common Stock | A | 46,948 | $0.00 | 392,058 | D | A |
| 02 Jan, 2026 | Nachum Shamir | Common Stock | A | 46,948 | $0.00 | 136,224 | D | A |
| 02 Jan, 2026 | David Benfer | Common Stock | A | 46,948 | $0.00 | 515,872 | D | A |
| 02 Jan, 2026 | Ross B Levin | Common Stock | A | 46,948 | $0.00 | 578,145 | D | A |
| 02 Jan, 2026 | Nathan Fischel | Common Stock | A | 46,948 | $0.00 | 677,672 | D | A |
| 14 Nov, 2025 | Paul J Isaac | Common Stock | A | 20,000 | $2.24 | 2,786,557 | I | P |
| 17 Nov, 2025 | Paul J Isaac | Common Stock | A | 10,000 | $2.18 | 97,299 | D | P |
| 01 Jul, 2025 | Nachum Shamir | Common Stock | A | 43,668 | $0.00 | 89,276 | D | A |
| 01 Jul, 2025 | Myriam Curet | Common Stock | A | 43,668 | $0.00 | 345,110 | D | A |
| 01 Jul, 2025 | Arun Swarup Menawat | Common Stock | A | 43,668 | $0.00 | 945,509 | D | A |
| 01 Jul, 2025 | Nathan Fischel | Common Stock | A | 43,668 | $0.00 | 630,724 | D | A |
| 01 Jul, 2025 | Ross B Levin | Common Stock | A | 43,668 | $0.00 | 531,197 | D | A |
| 01 Jul, 2025 | David Benfer | Common Stock | A | 43,668 | $0.00 | 468,924 | D | A |
| 08 Apr, 2025 | Kimberly R. Peery | Stock Options -Right to Buy | A | 50,000 | $0.00 | 300,750 | D | A |
| 10 Mar, 2025 | Paul J Isaac | Common stock | A | 38,000 | $1.81 | 87,299 | D | P |
| 06 Mar, 2025 | Paul J Isaac | Common stock | A | 23,299 | $1.81 | 49,066 | D | P |
| 07 Mar, 2025 | Paul J Isaac | Common stock | A | 1,489 | $1.79 | 2,766,557 | I | P |
| 02 Jan, 2025 | Ross B Levin | Common Stock | A | 56,497 | $0.00 | 487,529 | D | A |