Quick Takeaways
- VICR - VICOR CORP has 20 insiders with reported activity on this page.
- Net insider value flow over the last year: -$237,693,682.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 20 Insiders of VICOR CORP
- Symbol
- VICR on Nasdaq
- Location
- Andover, MA
What Changed
- Buy value: ; sell value: $237,693,682.
- Net share flow: -1,399,852.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$237,693,682.
Buys
$0
Shares: 0
Insiders: 0
Sells
$237,693,682
Shares: 1,399,852
Insiders: 18
Net
-$237,693,682
Shares: -1,399,852
Insiders: -18
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 1,079,576 | $0 | $206,345,059 | -$206,345,059 |
| 3-6 | 0 | 157,945 | $0 | $16,840,066 | -$16,840,066 |
| 6-9 | 0 | 156,518 | $0 | $14,142,338 | -$14,142,338 |
| 9-12 | 0 | 5,813 | $0 | $366,219 | -$366,219 |
VICOR CORP executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Patrizio Vinciarelli | Chairman and CEO, Director, 10%+ Owner | $1,451,449,615 | -$172,755,919 | -11% | Median | 13 May 2026 |
| Estia J. Eichten | Director | $32,857,812 | -$7,347,844 | -18% | Filing P/S | 13 Mar 2026 |
| Michael McNamara | General Manager Mfg. Ops., Director | $5,619,165 | -$7,545,434 | -57% | Filing P/S | 11 May 2026 |
| Claudio Tuozzolo | Corp. Vice President, Director | $4,033,614 | -$12,518,520 | -76% | Filing P/S | 11 May 2026 |
| Alex Gusinov | Corp. Vice President Eng. | $1,796,700 | -$1,989,356 | -53% | Filing P/S | 13 May 2026 |
| Sean Crilly | Corp. VP-Eng., Pwr Syst | $1,566,369 | -$2,557,459 | -62% | Median | 05 May 2026 |
| Samuel J. Anderson | Director | $1,046,984 | -$649,929 | -38% | Filing P/S | 23 Feb 2026 |
| Philip D. Davies | VP Global Sales & Marketing, Director | $309,120 | -$3,807,886 | -92% | Median | 05 May 2026 |
| Alvaro Doyle | VP and CIO | $12,050 | -$5,298,544 | -100% | Filing P/S | 12 May 2026 |
| Robert Gendron | Corp. VP - Marketing | $0 | -$1,067,286 | -100% | Mixed | 05 May 2026 |
| James F. Schmidt | CFO, Treasurer, Secretary, Director | $0 | -$5,914,607 | -100% | Mixed | 05 May 2026 |
| Nancy L. Grava | VP Human Resources | $0 | -$2,563,297 | -100% | Mixed | 05 May 2026 |
| Kemble D. Morrison | VP-Corporate Controller | $0 | -$1,353,724 | -100% | Mixed | 11 May 2026 |
| Andrew D'Amico | Director | $0 | -$5,120,871 | -100% | Mixed | 13 May 2026 |
| Zmira Lavie | Director | $0 | -$333,238 | -100% | Mixed | 28 Oct 2025 |
| Quentin A. Fendelet | Corp. VP - CAO | $0 | -$5,193,154 | -100% | Mixed | 11 May 2026 |
| Zheng John Shen | Director | $0 | -$690,817 | -100% | Mixed | 04 Mar 2026 |
| Jason Carlson | Director | $0 | -$985,797 | -100% | Mixed | 06 May 2026 |
| Michael Ansour | Director | Mixed | 21 Jun 2024 | |||
| Richard J. Nagel Jr. | Corp. VP-CAO | Mixed | 02 Mar 2022 |
Top shareholders of VICOR CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Patrizio Vinciarelli |
3/4/5
13D/G
|
Chairman and CEO, Director, 10%+ Owner |
47%
from 13D/G
|
9,016,945
mixed-class rows
|
$1,451,449,615 | -$172,755,919 | 13 May 2026 | |
| JPMORGAN CHASE & CO |
13F
13D/G
|
Company |
6.2%
from 13D/G
|
4,016,881
|
$440,250,199 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13D/G
13F
|
Company |
7.9%
|
2,658,780
|
$428,063,580 | $0 | 31 Mar 2026 | |
| VANGUARD GROUP INC |
13F
|
Company |
7.5%
|
2,534,534
|
$277,784,926 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
2.5%
|
836,955
|
$91,730,268 | — | 31 Dec 2025 | |
| NEEDHAM INVESTMENT MANAGEMENT LLC |
13F
|
Company |
1.7%
|
569,775
|
$62,447,340 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.7%
|
562,887
|
$61,702,810 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.6%
|
556,870
|
$61,042,858 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
1.3%
|
439,820
|
$48,205,000 | — | 31 Dec 2025 | |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE |
13F
|
Company |
1.3%
|
432,189
|
$47,367,914 | — | 31 Dec 2025 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
1.1%
|
374,088
|
$41,000,045 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.1%
|
358,177
|
$39,256,299 | — | 31 Dec 2025 | |
| ASHFORD CAPITAL MANAGEMENT INC |
13F
|
Company |
1%
|
353,856
|
$38,782,618 | — | 31 Dec 2025 | |
| AWM Investment Company, Inc. |
13F
|
Company |
0.98%
|
333,180
|
$36,516,528 | — | 31 Dec 2025 | |
| Estia J. Eichten |
3/4/5
|
Director |
0.56%
|
188,838
|
$32,857,812 | -$7,347,844 | 13 Mar 2026 | |
| PINNACLE ASSOCIATES LTD |
13F
|
Company |
0.74%
|
250,085
|
$27,409,316 | — | 31 Dec 2025 | |
| HERALD INVESTMENT MANAGEMENT Ltd |
13F
|
Company |
0.72%
|
245,000
|
$26,849,550 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.69%
|
234,144
|
$25,662,183 | — | 31 Dec 2025 | |
| COLRAIN CAPITAL LLC |
13F
|
Company |
0.67%
|
226,260
|
$24,798,096 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.66%
|
224,000
|
$24,550,399 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.65%
|
221,428
|
$24,268,509 | — | 31 Dec 2025 | |
| FMR LLC |
13F
|
Company |
0.62%
|
211,340
|
$23,162,882 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.44%
|
148,659
|
$16,293,027 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.43%
|
146,984
|
$16,109,461 | — | 31 Dec 2025 | |
| Arosa Capital Management LP |
13F
|
Company |
0.4%
|
135,000
|
$14,796,000 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.39%
|
133,796
|
$14,664,057 | — | 31 Dec 2025 | |
| FIRST TRUST ADVISORS LP |
13F
|
Company |
0.39%
|
132,769
|
$14,551,482 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.32%
|
108,661
|
$11,909,246 | — | 31 Dec 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.3%
|
103,636
|
$11,358,507 | — | 31 Dec 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.28%
|
94,753
|
$10,384,928 | — | 31 Dec 2025 | |
| JANUS HENDERSON GROUP PLC |
13F
|
Company |
0.27%
|
90,062
|
$9,872,207 | — | 31 Dec 2025 | |
| Alight Capital Management LP |
13F
|
Company |
0.26%
|
90,000
|
$9,864,000 | — | 31 Dec 2025 | |
| Bruce & Co., Inc. |
13F
|
Company |
0.26%
|
90,000
|
$9,864,000 | — | 31 Dec 2025 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.24%
|
81,619
|
$8,945,443 | — | 31 Dec 2025 | |
| PUBLIC SECTOR PENSION INVESTMENT BOARD |
13F
|
Company |
0.23%
|
78,641
|
$8,619,054 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.21%
|
70,708
|
$7,749,597 | — | 31 Dec 2025 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.19%
|
64,956
|
$7,119,177 | — | 31 Dec 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.18%
|
62,672
|
$6,868,802 | — | 31 Dec 2025 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
0.18%
|
62,061
|
$6,794,000 | — | 31 Dec 2025 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.18%
|
61,957
|
$6,790,469 | — | 31 Dec 2025 | |
| PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. |
13F
|
Company |
0.18%
|
61,096
|
$6,696,122 | — | 31 Dec 2025 | |
| Legal & General Group Plc |
13F
|
Company |
0.17%
|
58,287
|
$6,388,255 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.17%
|
56,848
|
$6,230,541 | — | 31 Dec 2025 | |
| JACOBS LEVY EQUITY MANAGEMENT, INC |
13F
|
Company |
0.17%
|
56,459
|
$6,187,906 | — | 31 Dec 2025 | |
| TUDOR INVESTMENT CORP ET AL |
13F
|
Company |
0.16%
|
54,024
|
$5,921,030 | — | 31 Dec 2025 | |
| Michael McNamara |
3/4/5
|
General Manager Mfg. Ops., Director |
0.05%
|
18,185
|
$5,619,165 | -$7,545,434 | 11 May 2026 | |
| Informed Momentum Co LLC |
13F
|
Company |
0.15%
|
50,870
|
$5,575,352 | — | 31 Dec 2025 | |
| Portolan Capital Management, LLC |
13F
|
Company |
0.14%
|
48,721
|
$5,339,822 | — | 31 Dec 2025 | |
| Swiss National Bank |
13F
|
Company |
0.13%
|
45,832
|
$5,023,187 | — | 31 Dec 2025 | |
| PRUDENTIAL FINANCIAL INC |
13F
|
Company |
0.13%
|
44,538
|
$4,881,365 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for VICOR CORP
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Alex Gusinov | vicr | Common Stock | Sale | -20% | $450,600 | $300.00 | -1,502 | 5,989 | 13 May 2026 | Direct |
| Andrew D'Amico | vicr | Common Stock | Sale | -100% | $374,774 | $312.31 | -1,200 | 0 | 13 May 2026 | Direct |
| Andrew D'Amico | vicr | Common Stock | Options Exercise | 1,200 | 1,200 | 13 May 2026 | Direct | |||
| Andrew D'Amico | vicr | Non Qualified Stock Option | Options Exercise | -9.58% | -1,200 | 11,320 | 13 May 2026 | Direct | ||
| Patrizio Vinciarelli | vicr | Common Stock | Gift | -0.08% | -7,000 | 8,848,090 | 13 May 2026 | Direct | ||
| Alvaro Doyle | vicr | Common Stock | Sale | -99% | $1,159,404 | $286.91 | -4,041 | 42 | 12 May 2026 | Direct |
| Alvaro Doyle | vicr | Common Stock | Options Exercise | 4,041 | 2,508 | 12 May 2026 | Direct | |||
| Alvaro Doyle | vicr | Non Qualified Stock Option | Options Exercise | -45% | -4,041 | 4,932 | 12 May 2026 | Direct | ||
| Andrew D'Amico | vicr | Common Stock | Sale | -100% | $171,212 | $303.03 | -565 | 0 | 12 May 2026 | Direct |
| Andrew D'Amico | vicr | Common Stock | Options Exercise | 565 | 565 | 12 May 2026 | Direct | |||
| Andrew D'Amico | vicr | Non Qualified Stock Option | Options Exercise | -100% | -565 | 0 | 12 May 2026 | Direct | ||
| Claudio Tuozzolo | vicr | Common Stock | Sale | -40.4% | $2,737,009 | $304.65 | -8,984 | 13,240 | 11 May 2026 | Direct |
| Claudio Tuozzolo | vicr | Common Stock | Options Exercise | 101% | 8,984 | 17,878 | 11 May 2026 | Direct | ||
| Claudio Tuozzolo | vicr | Non Qualified Stock Option | Options Exercise | -29.6% | -8,984 | 21,381 | 11 May 2026 | Direct | ||
| Kemble D. Morrison | VICR | Common Stock | Sale | -100% | $697,569 | $301.59 | -2,313 | 0 | 11 May 2026 | Direct |
| Kemble D. Morrison | VICR | Common Stock | Options Exercise | 2,313 | 2,313 | 11 May 2026 | Direct | |||
| Kemble D. Morrison | VICR | Non Qualified Stock Option | Options Exercise | -86.2% | -2,313 | 372 | 11 May 2026 | Direct | ||
| Michael McNamara | vicr | Common Stock | Sale | -50.6% | $5,752,962 | $309.00 | -18,618 | 18,185 | 11 May 2026 | Direct |
| Michael McNamara | vicr | Common Stock | Options Exercise | 194.6% | 18,618 | 28,185 | 11 May 2026 | Direct | ||
| Michael McNamara | vicr | Non Qualified Stock Option | Options Exercise | -100% | -18,618 | 0 | 11 May 2026 | Direct | ||
| Quentin A. Fendelet | VICR | Common Stock | Sale | -100% | $1,502,677 | $297.03 | -5,059 | 0 | 11 May 2026 | Direct |
| Quentin A. Fendelet | VICR | Common Stock | Options Exercise | 5,059 | 5,059 | 11 May 2026 | Direct | |||
| Quentin A. Fendelet | VICR | Non Qualified Stock Option | Options Exercise | -52.8% | -5,059 | 4,529 | 11 May 2026 | Direct | ||
| Claudio Tuozzolo | vicr | Common Stock | Sale | -31.6% | $1,698,107 | $276.93 | -6,132 | 13,240 | 06 May 2026 | Direct |
| Claudio Tuozzolo | vicr | Common Stock | Options Exercise | 55.6% | 6,132 | 17,170 | 06 May 2026 | Direct | ||
| Claudio Tuozzolo | vicr | Non Qualified Stock Option | Options Exercise | -83.6% | -6,132 | 1,202 | 06 May 2026 | Direct | ||
| Quentin A. Fendelet | vicr | Common Stock | Sale | -100% | $1,401,959 | $277.07 | -5,060 | 0 | 06 May 2026 | Direct |
| Quentin A. Fendelet | vicr | Common Stock | Options Exercise | 5,060 | 5,060 | 06 May 2026 | Direct | |||
| Quentin A. Fendelet | vicr | Non Qualified Stock Option | Options Exercise | -91.7% | -5,060 | 457 | 06 May 2026 | Direct | ||
| Jason Carlson | vicr | Common Stock | Sale | -100% | $220,072 | $275.09 | -800 | 0 | 06 May 2026 | Direct |
| Jason Carlson | vicr | Common Stock | Options Exercise | 800 | 800 | 06 May 2026 | Direct | |||
| Jason Carlson | vicr | Non Qualified Stock Option | Options Exercise | -80% | -800 | 200 | 06 May 2026 | Direct | ||
| Patrizio Vinciarelli | VICR | Non Qualified Stock Option | Award | 1,730 | 1,730 | 05 May 2026 | Direct | |||
| Philip D. Davies | VICR | Non Qualified Stock Option | Award | 4,547 | 4,547 | 05 May 2026 | Direct | |||
| Nancy L. Grava | vicr | Common Stock | Sale | -100% | $1,434,180 | $265.00 | -5,412 | 0 | 05 May 2026 | Direct |
| Nancy L. Grava | vicr | Common Stock | Options Exercise | 5,412 | 1,984 | 05 May 2026 | Direct | |||
| Nancy L. Grava | vicr | Non Qualified Stock Option | Options Exercise | -91.4% | -5,412 | 507 | 05 May 2026 | Direct | ||
| Nancy L. Grava | VICR | Non Qualified Stock Option | Award | 1,049 | 1,049 | 05 May 2026 | Direct | |||
| Michael McNamara | VICR | Non Qualified Stock Option | Award | 3,564 | 3,564 | 05 May 2026 | Direct | |||
| Kemble D. Morrison | VICR | Non Qualified Stock Option | Award | 497 | 497 | 05 May 2026 | Direct | |||
| Quentin A. Fendelet | vicr | Non Qualified Stock Option | Award | 2,514 | 2,514 | 05 May 2026 | Direct | |||
| James F. Schmidt | VICR | Non Qualified Stock Option | Award | 1,129 | 1,129 | 05 May 2026 | Direct | |||
| Claudio Tuozzolo | VICR | Non Qualified Stock Option | Award | 5,187 | 5,187 | 05 May 2026 | Direct | |||
| Robert Gendron | vicr | Non Qualified Stock Option | Award | 1,578 | 1,578 | 05 May 2026 | Direct | |||
| Andrew D'Amico | VICR | Non Qualified Stock Option | Award | 4,100 | 4,100 | 05 May 2026 | Direct | |||
| Sean Crilly | vicr | Non Qualified Stock Option | Award | 11.1% | 373 | 3,734 | 05 May 2026 | Direct | ||
| Alex Gusinov | VICR | Non Qualified Stock Option | Award | 2,633 | 2,633 | 05 May 2026 | Direct | |||
| Alvaro Doyle | VICR | Non Qualified Stock Option | Award | 1,514 | 1,514 | 05 May 2026 | Direct | |||
| James F. Schmidt | vicr | Common Stock | Sale | -100% | $1,080,961 | $252.92 | -4,274 | 0 | 04 May 2026 | Direct |
| James F. Schmidt | vicr | Common Stock | Options Exercise | 4,274 | 4,274 | 04 May 2026 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.