Vicor's three largest insider shareholders as of September 29, 2026 are Patrizio Vinciarelli (Chairman Ceo, 8.35Mn shares), Patrizio Vinciarelli (Chairman And Ceo, 167.12K shares), Estia J Eichten (Director, 104.83K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Patrizio Vinciarelli | Chairman Ceo | 8,347,390 | 0 | 8,347,390 | 98.1% | 07 Jul, 2026 |
| 2 | Estia J Eichten | Director | 104,825 | 0 | 104,825 | 1.2% | 28 Jul, 2026 |
| 3 | Michael Mcnamara | General Manager Mfg. Ops. | 18,185 | 0 | 18,185 | 0.2% | 12 May, 2026 |
| 4 | Claudio Tuozzolo | Corp. Vice President | 13,240 | 0 | 13,240 | 0.2% | 12 Jun, 2026 |
| 5 | Samuel J Anderson | Director | 7,443 | 0 | 7,443 | 0.1% | 24 Aug, 2026 |
| 6 | Sean Crilly | Corp. Vp Eng., Pwr Syst. | 7,229 | 0 | 7,229 | 0.1% | 08 Jun, 2026 |
| 7 | Alex Gusinov | Corp. Vice President Eng. | 5,989 | 0 | 5,989 | 0.1% | 14 May, 2026 |
| 8 | Philip D Davies | Corp. Vp Global Sales Mktg. | 1,920 | 0 | 1,920 | 0.0% | 03 Sep, 2026 |
| 9 | James F Schmidt | Cfo, Treasurer, Secretary | 314 | 0 | 314 | 0.0% | 23 Jun, 2026 |
| 10 | Alvaro Doyle | Vp And Cio | 42 | 0 | 42 | 0.0% | 13 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | Philip D Davies | Corp. Vp Global Sales Mktg. | Acquired M | 3,073 | $41.61 | $127.87K | 4,993 | Direct |
| 01 Sep, 2026 | Philip D Davies | Corp. Vp Global Sales Mktg. | Disposed S | 1,173 | $176.59 | $207.14K | 3,820 | Direct |
| 01 Sep, 2026 | Philip D Davies | Corp. Vp Global Sales Mktg. | Disposed S | 1,100 | $177.63 | $195.39K | 2,720 | Direct |
| 01 Sep, 2026 | Philip D Davies | Corp. Vp Global Sales Mktg. | Disposed S | 700 | $178.66 | $125.06K | 2,020 | Direct |
| 01 Sep, 2026 | Philip D Davies | Corp. Vp Global Sales Mktg. | Disposed S | 100 | $184.85 | $18.49K | 1,920 | Direct |
| 01 Sep, 2026 | Philip D Davies | Corp. Vp Global Sales Mktg. | Disposed M | 3,073 | $0.00 | $0 | 856 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Acquired M | 331 | $60.37 | $19.98K | 4,365 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Acquired M | 754 | $53.07 | $40.01K | 5,119 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Acquired M | 908 | $44.07 | $40.02K | 6,027 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Acquired M | 200 | $100.00 | $20.00K | 6,227 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Acquired M | 1,216 | $32.89 | $39.99K | 7,443 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Disposed M | 331 | $0.00 | $0 | 331 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Disposed M | 754 | $0.00 | $0 | 1,507 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Disposed M | 908 | $0.00 | $0 | 3,631 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Disposed M | 200 | $0.00 | $0 | 0 | Direct |
| 20 Aug, 2026 | Samuel J Anderson | Director | Disposed M | 1,216 | $0.00 | $0 | 3,648 | Direct |
| 17 Aug, 2026 | Zmira Lavie | Director | Acquired M | 908 | $44.07 | $40.02K | 908 | Direct |
| 17 Aug, 2026 | Zmira Lavie | Director | Disposed S | 908 | $250.00 | $227.00K | 0 | Direct |
| 17 Aug, 2026 | Zmira Lavie | Director | Disposed M | 908 | $0.00 | $0 | 3,631 | Direct |
| 17 Aug, 2026 | Samuel J Anderson | Director | Disposed S | 2,073 | $252.60 | $523.64K | 4,034 | Direct |