As of September 05, 2026, the three largest insider holders of CLFD are Ronald G Roth (Director, 1.28Mn shares), Ronald G Roth (Director, 1.28Mn shares), Cheryl Beranek (Chief Executive Officer, 513.79K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Cheryl Beranek | Chief Executive Officer | 1,520,373 | 0 | 1,520,373 | 39.3% | 03 Jun, 2026 |
| 2 | Ronald G Roth | Director, TenPercentOwner | 1,281,808 | 0 | 1,281,808 | 33.1% | 02 Mar, 2026 |
| 3 | John P Hill | Chief Operating Officer | 559,630 | 0 | 559,630 | 14.5% | 02 Jul, 2026 |
| 4 | Daniel R Herzog | Chief Financial Officer | 244,327 | 0 | 244,327 | 6.3% | 02 Jul, 2026 |
| 5 | Charles N Hayssen | Director | 142,328 | 0 | 142,328 | 3.7% | 03 Mar, 2025 |
| 6 | Anis Khemakhem | Chief Commercial Officer | 50,410 | 0 | 50,410 | 1.3% | 02 Jul, 2026 |
| 7 | Roger G Harding | Director | 30,021 | 0 | 30,021 | 0.8% | 06 Mar, 2024 |
| 8 | Donald R. Hayward | Director | 10,870 | 0 | 10,870 | 0.3% | 20 Feb, 2026 |
| 9 | Carol Ann Wirsbinski | Director | 9,790 | 0 | 9,790 | 0.3% | 02 Mar, 2026 |
| 10 | Walter Louis Jr Jones | Director | 8,841 | 0 | 8,841 | 0.2% | 12 May, 2026 |
| 11 | Catherine T. Kelly | Director | 5,317 | 0 | 5,317 | 0.1% | 02 Mar, 2026 |
| 12 | Kathleen Skarvan | Director | 2,870 | 0 | 2,870 | 0.1% | 02 Mar, 2026 |
| 13 | Rebecca Seidel | Director | 2,870 | 0 | 2,870 | 0.1% | 02 Mar, 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 |
|---|---|---|---|---|---|---|---|---|
| 30 Jun, 2026 | John P Hill | Chief Operating Officer | Acquired A | 459 | $24.78 | $11.37K | 192,674 | Direct |
| 30 Jun, 2026 | Anis Khemakhem | Chief Commercial Officer | Acquired A | 158 | $24.78 | $3.92K | 25,284 | Direct |
| 30 Jun, 2026 | Daniel R Herzog | Chief Financial Officer | Acquired A | 752 | $24.78 | $18.63K | 85,834 | Direct |
| 09 Jun, 2026 | Anis Khemakhem | Chief Commercial Officer | Disposed S | 1,684 | $39.90 | $67.19K | 25,126 | Direct |
| 01 Jun, 2026 | Cheryl Beranek | Chief Executive Officer | Disposed S | 7,500 | $46.92 | $351.90K | 494,541 | Direct |
| 27 May, 2026 | Cheryl Beranek | Chief Executive Officer | Disposed S | 2,500 | $50.00 | $125.00K | 502,041 | Direct |
| 11 May, 2026 | Walter Louis Jr Jones | Director | Disposed S | 2,391 | $46.05 | $110.11K | 8,682 | Direct |
| 08 May, 2026 | Cheryl Beranek | Chief Executive Officer | Disposed S | 5,000 | $40.27 | $201.35K | 507,041 | Direct |
| 11 May, 2026 | Cheryl Beranek | Chief Executive Officer | Disposed S | 2,500 | $45.02 | $112.55K | 504,541 | Direct |
| 06 May, 2026 | Anis Khemakhem | Chief Commercial Officer | Disposed F | 635 | $30.28 | $19.23K | 26,810 | Direct |
| 27 Feb, 2026 | Rebecca Seidel | Director | Acquired A | 2,544 | $0.00 | $0 | 2,870 | Direct |
| 27 Feb, 2026 | Ronald G Roth | Director, TenPercentOwner | Acquired A | 2,544 | $0.00 | $0 | 1,281,808 | Direct |
| 27 Feb, 2026 | Kathleen Skarvan | Director | Acquired A | 2,544 | $0.00 | $0 | 2,870 | Direct |
| 27 Feb, 2026 | Catherine T. Kelly | Director | Acquired A | 2,544 | $0.00 | $0 | 5,317 | Direct |
| 27 Feb, 2026 | Carol Ann Wirsbinski | Director | Acquired A | 2,544 | $0.00 | $0 | 9,631 | Direct |
| 27 Feb, 2026 | Rebecca Seidel | Director | Acquired A | 2,544 | $0.00 | $0 | 2,870 | Direct |
| 27 Feb, 2026 | Rebecca Seidel | Director | Acquired A | 2,544 | $0.00 | $0 | 2,870 | Direct |
| 27 Feb, 2026 | Catherine T. Kelly | Director | Acquired A | 2,544 | $0.00 | $0 | 5,317 | Direct |
| 27 Feb, 2026 | Carol Ann Wirsbinski | Director | Acquired A | 2,544 | $0.00 | $0 | 9,631 | Direct |
| 27 Feb, 2026 | Catherine T. Kelly | Director | Acquired A | 2,544 | $0.00 | $0 | 5,317 | Direct |