As of September 29, 2026, the three largest insider holders of HDSN are Partners, Lp Hartree (TenPercentOwner, 5.35Mn shares), Brian F Coleman (President, Ceo, 426.97K shares), Stephen P Mandracchia (Director, 396.76K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Partners, Lp Hartree | TenPercentOwner | 5,348,517 | 0 | 5,348,517 | 77.8% | 28 Sep, 2026 |
| 2 | Brian F Coleman | President, Ceo | 426,968 | 0 | 426,968 | 6.2% | 15 Dec, 2025 |
| 3 | Stephen P Mandracchia | Director | 0 | 396,756 | 396,756 | 5.8% | 09 Jan, 2023 |
| 4 | Vincent P Abbatecola | Director | 169,748 | 0 | 169,748 | 2.5% | 18 Nov, 2025 |
| 5 | Kathleen Houghton | Sr. Vp Sales And Marketing | 158,618 | 0 | 158,618 | 2.3% | 12 Jan, 2026 |
| 6 | Eric A Prouty | Director | 158,292 | 0 | 158,292 | 2.3% | 22 Jun, 2026 |
| 7 | Otto C Morch | Director | 87,366 | 0 | 87,366 | 1.3% | 06 Jul, 2022 |
| 8 | Loan Nguyen Mansy | Director | 34,476 | 0 | 34,476 | 0.5% | 22 Jun, 2026 |
| 9 | Richard Parrillo | Director | 25,595 | 0 | 25,595 | 0.4% | 15 May, 2026 |
| 10 | Nat Krishnamurti | Cfo | 25,207 | 0 | 25,207 | 0.4% | 10 Nov, 2022 |
| 11 | Alan Sheriff | Director | 12,484 | 0 | 12,484 | 0.2% | 22 Jun, 2026 |
| 12 | Jeffrey R Feeler | Director | 12,384 | 0 | 12,384 | 0.2% | 22 Jun, 2026 |
| 13 | Nicole E Bulgarino | Director | 11,048 | 0 | 11,048 | 0.2% | 15 May, 2026 |
| 14 | Kenneth Gaglione | President And Ceo | 0 | 5,000 | 5,000 | 0.1% | 15 May, 2026 |
| 15 | Brian J. Bertaux | Chief Financial Officer | 2,000 | 0 | 2,000 | 0.0% | 21 May, 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 |
|---|---|---|---|---|---|---|---|---|
| 24 Sep, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 118,549 | $5.10 | $604.45K | 5,348,517 | Direct |
| 21 Sep, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 2,502 | $5.10 | $12.76K | 5,218,955 | Direct |
| 23 Sep, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 11,013 | $5.10 | $56.17K | 5,229,968 | Direct |
| 16 Sep, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 11,136 | $5.10 | $56.79K | 5,216,453 | Direct |
| 02 Sep, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 5,317 | $5.10 | $27.12K | 5,205,317 | Direct |
| 24 Aug, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 9,446 | $5.50 | $51.95K | 5,108,834 | Direct |
| 25 Aug, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 91,166 | $5.50 | $501.09K | 5,200,000 | Direct |
| 12 Aug, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 5,198 | $5.50 | $28.59K | 5,099,388 | Direct |
| 29 Jul, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 52,104 | $5.99 | $312.10K | 5,094,190 | Direct |
| 20 Jul, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 17,842 | $5.99 | $106.86K | 4,994,378 | Direct |
| 21 Jul, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 47,708 | $5.99 | $285.74K | 5,042,086 | Direct |
| 06 Jul, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 4,634 | $5.99 | $27.76K | 4,975,936 | Direct |
| 07 Jul, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 600 | $5.99 | $3.59K | 4,976,536 | Direct |
| 30 Jun, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 204,789 | $5.68 | $1.16Mn | 4,411,889 | Direct |
| 01 Jul, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 288,111 | $5.88 | $1.70Mn | 4,700,000 | Direct |
| 02 Jul, 2026 | Partners, Lp Hartree | TenPercentOwner | Acquired P | 271,302 | $5.97 | $1.62Mn | 4,971,302 | Direct |
| 17 Jun, 2026 | Nicole E Bulgarino | Director | Acquired A | 31,780 | $0.00 | $0 | 31,780 | Direct |
| 17 Jun, 2026 | Richard Parrillo | Director | Acquired A | 31,780 | $0.00 | $0 | 31,780 | Direct |
| 17 Jun, 2026 | Eric A Prouty | Director | Acquired A | 4,440 | $0.00 | $0 | 158,292 | Direct |
| 17 Jun, 2026 | Jeffrey R Feeler | Director | Acquired A | 3,219 | $0.00 | $0 | 12,384 | Direct |