As of September 09, 2026, the three largest insider holders of SXI are David A. Dunbar (President/Ceo/Chairman, 75.97K shares), Alan J Glass (Vice President, 22.72K shares), Jeffrey S Edwards (Director, 14.42K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | David A. Dunbar | President/Ceo/Chairman | 0 | 75,973 | 75,973 | 31.5% | 01 Sep, 2026 |
| 2 | Alan J Glass | Vice President | 22,723 | 0 | 22,723 | 9.4% | 26 Aug, 2026 |
| 3 | Jeffrey S Edwards | Director | 14,424 | 0 | 14,424 | 6.0% | 22 Oct, 2025 |
| 4 | Maschera Flavio | Vice President/Chief Innovatio | 14,116 | 0 | 14,116 | 5.9% | 08 Sep, 2022 |
| 5 | Paul C. Burns | Vice Pres. Strategy Business | 13,992 | 0 | 13,992 | 5.8% | 07 Feb, 2023 |
| 6 | Charles H Jr Cannon | Director | 0 | 13,046 | 13,046 | 5.4% | 20 Feb, 2026 |
| 7 | Michael A Hickey | Director | 12,905 | 0 | 12,905 | 5.4% | 22 Oct, 2025 |
| 8 | Thomas E Chorman | Director | 12,316 | 0 | 12,316 | 5.1% | 03 Sep, 2026 |
| 9 | Thomas J Hansen | Director | 11,389 | 0 | 11,389 | 4.7% | 22 Oct, 2025 |
| 10 | Andy L Nemeth | Director | 8,639 | 0 | 8,639 | 3.6% | 04 Feb, 2026 |
| 11 | Sean C Valashinas | Vp/Chief Accounting Officer | 7,586 | 0 | 7,586 | 3.1% | 03 Jan, 2024 |
| 12 | Ademir Sarcevic | Vice President/Cfo/Treasurer | 7,486 | 0 | 7,486 | 3.1% | 26 Aug, 2026 |
| 13 | Annemarie Bell | Vp, Chief Hr Officer | 7,311 | 0 | 7,311 | 3.0% | 27 Oct, 2025 |
| 14 | Barbara Joanne Edwards | Director | 5,519 | 0 | 5,519 | 2.3% | 17 Jun, 2026 |
| 15 | Vineet Kshirsagar | Chief Strategy Officer | 5,003 | 0 | 5,003 | 2.1% | 25 Aug, 2026 |
| 16 | Robin J Davenport | Director | 4,711 | 0 | 4,711 | 2.0% | 25 Aug, 2026 |
| 17 | Max Arets | Vp; Chief Information Officer | 1,596 | 0 | 1,596 | 0.7% | 25 Aug, 2026 |
| 18 | Amy Gagnon | Vp; Chief Accounting Officer | 1,198 | 0 | 1,198 | 0.5% | 28 Oct, 2024 |
| 19 | Michelle Newbury | Chief Hr Officer Vp | 720 | 0 | 720 | 0.3% | 25 Aug, 2026 |
| 20 | Danielle Rangel | Vp Chief Accounting Officer | 333 | 0 | 333 | 0.1% | 25 Aug, 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 |
|---|---|---|---|---|---|---|---|---|
| 31 Aug, 2026 | David A. Dunbar | President/Ceo/Chairman | Disposed S | 4,000 | $290.81 | $1.16Mn | 84,973 | Indirect |
| 31 Aug, 2026 | David A. Dunbar | President/Ceo/Chairman | Disposed S | 9,000 | $290.82 | $2.62Mn | 75,973 | Indirect |
| 24 Aug, 2026 | Ademir Sarcevic | Vice President/Cfo/Treasurer | Disposed S | 2,300 | $306.13 | $704.09K | 7,486 | Direct |
| 24 Aug, 2026 | Alan J Glass | Vice President | Disposed S | 1,391 | $303.19 | $421.73K | 22,723 | Direct |
| 21 Aug, 2026 | Alan J Glass | Clo, Vp Secretary | Acquired M | 912 | — | — | 23,635 | Direct |
| 21 Aug, 2026 | David A. Dunbar | President/Ceo/Chairman | Acquired M | 4,441 | — | — | 5,871 | Direct |
| 21 Aug, 2026 | Robin J Davenport | Director | Acquired A | 3 | $308.08 | $826 | 4,711 | Direct |
| 23 Aug, 2026 | Richard Colby Slaughter | Clo, Vp And Secretary | Acquired A | 1,049 | — | — | 1,049 | Direct |
| 23 Aug, 2026 | Barbara Joanne Edwards | Director | Acquired A | 143 | — | — | 143 | Direct |
| 21 Aug, 2026 | Michelle Newbury | Chief Hr Officer Vp | Acquired M | 126 | — | — | 756 | Direct |
| 21 Aug, 2026 | Max Arets | Vp; Chief Information Officer | Acquired A | 1 | $308.15 | $432 | 1,336 | Direct |
| 21 Aug, 2026 | Danielle Rangel | Vp Chief Accounting Officer | Acquired M | 85 | — | — | 293 | Direct |
| 21 Aug, 2026 | Ademir Sarcevic | Vice President/Cfo/Treasurer | Acquired M | 602 | — | — | 8,230 | Direct |
| 21 Aug, 2026 | Vineet Kshirsagar | Chief Strategy Officer | Acquired M | 239 | — | — | 4,886 | Direct |
| 23 Aug, 2026 | Charles H Jr Cannon | Director | Acquired A | 286 | — | — | 286 | Direct |
| 21 Aug, 2026 | David A. Dunbar | President/Ceo/Chairman | Disposed F | 1,644 | $310.28 | $510.10K | 4,227 | Direct |
| 21 Aug, 2026 | Ademir Sarcevic | Vice President/Cfo/Treasurer | Disposed F | 223 | $310.28 | $69.19K | 8,007 | Direct |
| 21 Aug, 2026 | Michelle Newbury | Chief Hr Officer Vp | Disposed F | 36 | $310.28 | $11.17K | 720 | Direct |
| 21 Aug, 2026 | Danielle Rangel | Vp Chief Accounting Officer | Disposed F | 26 | $310.28 | $8.07K | 267 | Direct |
| 21 Aug, 2026 | Alan J Glass | Clo, Vp Secretary | Disposed F | 393 | $310.28 | $121.94K | 23,242 | Direct |