OESX's three largest insider shareholders as of September 09, 2026 are Anthony L. Otten (Director, 234.41K shares), Mark C Williamson (Director, 157.68K shares), Scott A. Green (President And Coo, 129.68K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Mark C Williamson | Director | 157,676 | 0 | 157,676 | 20.8% | 13 Jun, 2022 |
| 2 | Scott A. Green | President And Coo | 129,678 | 0 | 129,678 | 17.1% | 12 Aug, 2026 |
| 3 | Michael H Jenkins | Chief Executive Officer | 124,625 | 0 | 124,625 | 16.5% | 26 Feb, 2025 |
| 4 | Michael W Altschaefl | Ceo And Board Chair | 111,111 | 0 | 111,111 | 14.7% | 14 Dec, 2022 |
| 5 | J Per Brodin | Evp, Cfo, Cao Treasurer | 85,263 | 0 | 85,263 | 11.3% | 12 Aug, 2026 |
| 6 | Sally A. Washlow | Chief Executive Officer | 61,259 | 0 | 61,259 | 8.1% | 12 Aug, 2026 |
| 7 | Ellen B Richstone | Director | 35,897 | 0 | 35,897 | 4.7% | 12 Aug, 2026 |
| 8 | Anthony L. Otten | Director | 25,973 | 0 | 25,973 | 3.4% | 12 Aug, 2026 |
| 9 | Heather L Wishart-Smith | Director | 11,405 | 0 | 11,405 | 1.5% | 24 Aug, 2026 |
| 10 | Richard A Shapiro | Director | 9,219 | 0 | 9,219 | 1.2% | 12 Aug, 2026 |
| 11 | Alan B Howe | Director | 5,181 | 0 | 5,181 | 0.7% | 13 Jun, 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 |
|---|---|---|---|---|---|---|---|---|
| 20 Aug, 2026 | Heather L Wishart-Smith | Director | Acquired P | 1,054 | $18.96 | $19.99K | 11,405 | Direct |
| 11 Aug, 2026 | Heather L Wishart-Smith | Director | Acquired A | 2,532 | $0.00 | $0 | 10,351 | Direct |
| 11 Aug, 2026 | Anthony L. Otten | Director | Acquired A | 2,532 | $0.00 | $0 | 25,973 | Direct |
| 11 Aug, 2026 | Richard A Shapiro | Director | Acquired A | 2,532 | $0.00 | $0 | 9,219 | Direct |
| 11 Aug, 2026 | Scott A. Green | President And Coo | Acquired A | 9,000 | $0.00 | $0 | 129,678 | Direct |
| 11 Aug, 2026 | Sally A. Washlow | Chief Executive Officer | Acquired A | 12,000 | $0.00 | $0 | 61,259 | Direct |
| 11 Aug, 2026 | J Per Brodin | Evp, Cfo, Cao Treasurer | Acquired A | 9,000 | $0.00 | $0 | 85,263 | Direct |
| 11 Aug, 2026 | Ellen B Richstone | Director | Acquired A | 2,532 | $0.00 | $0 | 35,897 | Direct |
| 11 Aug, 2026 | J Per Brodin | Evp, Cfo, Cao Treasurer | Acquired A | 17,500 | $0.00 | $0 | 17,500 | Direct |
| 11 Aug, 2026 | Scott A. Green | President And Coo | Acquired A | 17,500 | $0.00 | $0 | 17,500 | Direct |
| 11 Aug, 2026 | Sally A. Washlow | Chief Executive Officer | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 23 Jun, 2026 | Sally A. Washlow | Chief Executive Officer | Acquired P | 955 | $9.50 | $9.07K | 47,479 | Direct |
| 24 Jun, 2026 | Sally A. Washlow | Chief Executive Officer | Acquired P | 1,780 | $9.47 | $16.86K | 49,259 | Direct |
| 27 Feb, 2026 | J Per Brodin | Evp, Cfo, Cao Treasurer | Acquired P | 500 | $11.07 | $5.54K | 92,811 | Direct |
| 19 Nov, 2025 | Sally A. Washlow | Chief Executive Officer | Acquired P | 21,166 | $14.17 | $299.92K | 46,524 | Direct |
| 07 Aug, 2025 | Sally A. Washlow | Chief Executive Officer | Acquired A | 500,000 | $0.00 | $0 | 50,000 | Direct |
| 18 Jul, 2025 | Scott A. Green | President And Coo | Acquired A | 125,000 | $0.00 | $0 | 12,500 | Direct |
| 18 Jul, 2025 | J Per Brodin | Evp, Cfo, Cao Treasurer | Acquired A | 125,000 | $0.00 | $0 | 12,500 | Direct |
| 01 Jul, 2025 | Heather L Wishart-Smith | Director | Acquired A | 20,000 | $0.00 | $0 | 7,820 | Direct |
| 01 Jul, 2025 | Anthony L. Otten | Director | Acquired A | 20,000 | $0.00 | $0 | 234,412 | Direct |