STXS's three largest insider shareholders as of September 29, 2026 are Paul J Isaac (Director, 2.88Mn shares), Paul J Isaac (Director, 2.77Mn shares), Arun Swarup Menawat (Director, 1.04Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Paul J Isaac | Director, Other | 184,598 | 2,786,557 | 2,971,155 | 42.2% | 18 Nov, 2025 |
| 2 | Arun Swarup Menawat | Director | 1,035,560 | 0 | 1,035,560 | 14.7% | 01 Jul, 2026 |
| 3 | Nathan Fischel | Director, TenPercentOwner | 720,775 | 0 | 720,775 | 10.2% | 01 Jul, 2026 |
| 4 | Ross B Levin | Director | 621,248 | 0 | 621,248 | 8.8% | 01 Jul, 2026 |
| 5 | David Benfer | Director | 558,975 | 0 | 558,975 | 7.9% | 01 Jul, 2026 |
| 6 | Robert J Messey | Director | 518,402 | 0 | 518,402 | 7.4% | 02 Jan, 2024 |
| 7 | Myriam Curet | Director | 435,161 | 0 | 435,161 | 6.2% | 01 Jul, 2026 |
| 8 | Nachum Shamir | Director | 179,327 | 0 | 179,327 | 2.5% | 01 Jul, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 01 Jul, 2026 | Ross B Levin | Director | Acquired A | 43,103 | $0.00 | $0 | 621,248 | Direct |
| 01 Jul, 2026 | Nachum Shamir | Director | Acquired A | 43,103 | $0.00 | $0 | 179,327 | Direct |
| 01 Jul, 2026 | Myriam Curet | Director | Acquired A | 43,103 | $0.00 | $0 | 435,161 | Direct |
| 01 Jul, 2026 | Arun Swarup Menawat | Director | Acquired A | 43,103 | $0.00 | $0 | 1,035,560 | Direct |
| 01 Jul, 2026 | Nathan Fischel | Director, TenPercentOwner | Acquired A | 43,103 | $0.00 | $0 | 720,775 | Direct |
| 01 Jul, 2026 | David Benfer | Director | Acquired A | 43,103 | $0.00 | $0 | 558,975 | Direct |
| 11 Apr, 2026 | Kimberly R. Peery | Chief Financial Officer | Acquired A | 40,000 | $0.00 | $0 | 340,750 | Direct |
| 02 Jan, 2026 | David Benfer | Director | Acquired A | 46,948 | $0.00 | $0 | 515,872 | Direct |
| 02 Jan, 2026 | Arun Swarup Menawat | Director | Acquired A | 46,948 | $0.00 | $0 | 992,457 | Direct |
| 02 Jan, 2026 | Myriam Curet | Director | Acquired A | 46,948 | $0.00 | $0 | 392,058 | Direct |
| 02 Jan, 2026 | Nachum Shamir | Director | Acquired A | 46,948 | $0.00 | $0 | 136,224 | Direct |
| 02 Jan, 2026 | Ross B Levin | Director | Acquired A | 46,948 | $0.00 | $0 | 578,145 | Direct |
| 02 Jan, 2026 | Nathan Fischel | Director, TenPercentOwner | Acquired A | 46,948 | $0.00 | $0 | 677,672 | Direct |
| 14 Nov, 2025 | Paul J Isaac | Director, Other | Acquired P | 20,000 | $2.24 | $44.80K | 2,786,557 | Indirect |
| 17 Nov, 2025 | Paul J Isaac | Director, Other | Acquired P | 10,000 | $2.18 | $21.80K | 97,299 | Direct |
| 01 Jul, 2025 | Myriam Curet | Director | Acquired A | 43,668 | $0.00 | $0 | 345,110 | Direct |
| 01 Jul, 2025 | Nachum Shamir | Director | Acquired A | 43,668 | $0.00 | $0 | 89,276 | Direct |
| 01 Jul, 2025 | Ross B Levin | Director | Acquired A | 43,668 | $0.00 | $0 | 531,197 | Direct |
| 01 Jul, 2025 | Nathan Fischel | Director, TenPercentOwner | Acquired A | 43,668 | $0.00 | $0 | 630,724 | Direct |
| 01 Jul, 2025 | David Benfer | Director | Acquired A | 43,668 | $0.00 | $0 | 468,924 | Direct |