Hydrofarm Holdings's top three insider shareholders as of September 09, 2026 are William Douglas Toler (Chief Executive Officer, 221.67K shares), Renah Persofsky (Director, 91.50K shares), Patrick Chung (Director, 91.15K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | William Douglas Toler | Chief Executive Officer | 221,672 | 0 | 221,672 | 28.4% | 08 Jan, 2026 |
| 2 | Patrick Chung | Director | 106,249 | 0 | 106,249 | 13.6% | 25 Jun, 2026 |
| 3 | Melisa Denis | Director | 103,794 | 0 | 103,794 | 13.3% | 25 Jun, 2026 |
| 4 | Renah Persofsky | Director | 91,498 | 0 | 91,498 | 11.7% | 25 Jun, 2026 |
| 5 | Susan Peters | Director | 76,649 | 0 | 76,649 | 9.8% | 10 Jun, 2025 |
| 6 | Bruce John Lindeman | Chief Executive Officer | 56,683 | 0 | 56,683 | 7.3% | 19 Aug, 2025 |
| 7 | Richard Christopher Yetter | Director | 50,000 | 0 | 50,000 | 6.4% | 25 Jun, 2026 |
| 8 | Terence Fitch | President | 28,450 | 0 | 28,450 | 3.6% | 06 Jun, 2022 |
| 9 | Mark S Parker | President | 18,558 | 0 | 18,558 | 2.4% | 11 Aug, 2026 |
| 10 | Kevin Patrick O'Brien | Chief Financial Officer | 13,222 | 0 | 13,222 | 1.7% | 08 Jan, 2026 |
| 11 | Erica Ackerman | Cao And Corporate Controller | 7,402 | 0 | 7,402 | 0.9% | 11 Aug, 2026 |
| 12 | Joseph D Rumley | Chief Accounting Officer | 5,961 | 0 | 5,961 | 0.8% | 22 Mar, 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 |
|---|---|---|---|---|---|---|---|---|
| 08 Aug, 2026 | Erica Ackerman | Cao And Corporate Controller | Disposed F | 138 | $1.60 | $221 | 7,402 | Direct |
| 08 Aug, 2026 | Mark S Parker | President | Disposed F | 740 | $1.60 | $1.18K | 18,558 | Direct |
| 23 Jun, 2026 | Richard Christopher Yetter | Director | Acquired A | 30,000 | $0.00 | $0 | 50,000 | Direct |
| 23 Jun, 2026 | Renah Persofsky | Director | Acquired A | 30,000 | $0.00 | $0 | 91,498 | Direct |
| 23 Jun, 2026 | Patrick Chung | Director | Acquired A | 30,000 | $0.00 | $0 | 91,148 | Direct |
| 23 Jun, 2026 | Melisa Denis | Director | Acquired A | 30,000 | $0.00 | $0 | 88,423 | Direct |
| 06 Jan, 2026 | Kevin Patrick O'Brien | Chief Financial Officer | Disposed S | 1,150 | $1.51 | $1.74K | 13,222 | Direct |
| 06 Jan, 2026 | Erica Ackerman | Cao And Corporate Controller | Disposed F | 687 | $1.51 | $1.04K | 7,540 | Direct |
| 06 Jan, 2026 | Kevin Patrick O'Brien | Chief Financial Officer | Disposed S | 1,150 | $1.51 | $1.74K | 13,222 | Direct |
| 06 Jan, 2026 | Kevin Patrick O'Brien | Chief Financial Officer | Disposed S | 1,150 | $1.51 | $1.74K | 13,222 | Direct |
| 06 Jan, 2026 | William Douglas Toler | Chief Executive Officer | Disposed F | 5,189 | $1.51 | $7.84K | 221,672 | Direct |
| 06 Jan, 2026 | Kevin Patrick O'Brien | Chief Financial Officer | Disposed S | 1,150 | $1.51 | $1.74K | 13,222 | Direct |
| 06 Jan, 2026 | Mark S Parker | President | Disposed F | 1,672 | $1.51 | $2.52K | 19,328 | Direct |
| 04 Dec, 2025 | Melisa Denis | Director | Disposed S | 2,875 | $1.88 | $5.41K | 58,543 | Direct |
| 05 Dec, 2025 | Melisa Denis | Director | Disposed S | 120 | $1.92 | $230 | 58,423 | Direct |
| 01 Oct, 2025 | Richard Christopher Yetter | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 01 Oct, 2025 | Richard Christopher Yetter | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 01 Oct, 2025 | Richard Christopher Yetter | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 01 Oct, 2025 | Richard Christopher Yetter | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 18 Aug, 2025 | Kevin Patrick O'Brien | Chief Financial Officer | Disposed F | 48 | $4.51 | $216 | 14,372 | Direct |