Vicor (VICR)
Vicor on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as electronic components, nec.
2.3M
Short interest
settlement 2026-10-15
2.3
Days to cover
+0.1 days vs prior
74.8%
Short share of volume
2026-10-28
4
Fails to deliver
settlement 2026-09-22
Thu 18 Feb
Next earnings
estimated date
-$15.4M
Insider flow, 90 days
0 buys, 50 sells
As of 2026-10-28.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in VICR is 2,263,509 shares, up 217,602 shares over the last month. Over the last 48 readings it ranged from 1,043,080 shares (14 November 2025) to 2,413,976 shares (30 September 2026). At the reported average volume of 982K shares a day that is 2.3 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/vicr" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 2,263,509 | -6.2% | 981,793 | 2.31 |
| 2026-09-30 | 2,413,976 | +18.0% | 1,089,067 | 2.22 |
| 2026-09-15 | 2,045,907 | +14.9% | 633,315 | 3.23 |
| 2026-08-31 | 1,781,190 | +21.9% | 835,666 | 2.13 |
| 2026-08-14 | 1,461,572 | -3.2% | 678,470 | 2.15 |
| 2026-07-31 | 1,509,228 | +17.2% | 1,063,314 | 1.42 |
| 2026-07-15 | 1,287,738 | -1.2% | 691,643 | 1.86 |
| 2026-06-30 | 1,302,786 | -12.4% | 1,096,330 | 1.19 |
| 2026-06-15 | 1,487,103 | -4.7% | 691,471 | 2.15 |
| 2026-05-29 | 1,561,109 | +0.7% | 835,172 | 1.87 |
| 2026-05-15 | 1,550,524 | -1.9% | 956,750 | 1.62 |
| 2026-04-30 | 1,579,713 | -4.1% | 1,098,644 | 1.44 |
| 2026-04-15 | 1,647,819 | -4.4% | 523,408 | 3.15 |
| 2026-03-31 | 1,723,814 | +2.3% | 1,124,154 | 1.53 |
| 2026-03-13 | 1,684,952 | -1.6% | 820,265 | 2.05 |
| 2026-02-27 | 1,712,123 | +18.3% | 804,408 | 2.13 |
| 2026-02-13 | 1,446,788 | -8.0% | 614,455 | 2.35 |
| 2026-01-30 | 1,573,243 | -15.0% | 499,099 | 3.15 |
| 2026-01-15 | 1,851,004 | +20.0% | 782,537 | 2.37 |
| 2025-12-31 | 1,542,290 | +27.9% | 471,568 | 3.27 |
| 2025-12-15 | 1,205,653 | +8.0% | 318,673 | 3.78 |
| 2025-11-28 | 1,116,289 | +7.0% | 271,453 | 4.11 |
| 2025-11-14 | 1,043,080 | -14.4% | 428,631 | 2.43 |
| 2025-10-31 | 1,218,401 | -10.2% | 919,574 | 1.32 |
| 2025-10-15 | 1,356,196 | -4.7% | 269,320 | 5.04 |
| 2025-09-30 | 1,422,907 | -1.0% | 306,510 | 4.64 |
| 2025-09-15 | 1,437,342 | +9.6% | 257,777 | 5.58 |
| 2025-08-29 | 1,311,170 | -2.0% | 351,419 | 3.73 |
| 2025-08-15 | 1,337,902 | -1.2% | 437,302 | 3.06 |
| 2025-07-31 | 1,354,172 | -13.0% | 566,139 | 2.39 |
| 2025-07-15 | 1,557,020 | +3.3% | 157,801 | 9.87 |
| 2025-06-30 | 1,507,194 | +5.5% | 333,629 | 4.52 |
| 2025-06-13 | 1,428,927 | -0.7% | 148,870 | 9.60 |
| 2025-05-30 | 1,439,012 | -4.8% | 199,834 | 7.20 |
| 2025-05-15 | 1,511,317 | -9.8% | 278,179 | 5.43 |
| 2025-04-30 | 1,676,400 | +0.7% | 265,924 | 6.30 |
| 2025-04-15 | 1,665,011 | -4.9% | 281,443 | 5.92 |
| 2025-03-31 | 1,750,327 | +1.7% | 219,833 | 7.96 |
| 2025-03-14 | 1,720,669 | +8.0% | 335,216 | 5.13 |
| 2025-02-28 | 1,592,952 | -5.1% | 488,272 | 3.26 |
| 2025-02-14 | 1,678,134 | +3.9% | 172,752 | 9.71 |
| 2025-01-31 | 1,614,905 | +12.0% | 291,211 | 5.55 |
| 2025-01-15 | 1,442,334 | +1.0% | 157,531 | 9.16 |
| 2024-12-31 | 1,428,129 | -17.3% | 241,318 | 5.92 |
| 2024-12-13 | 1,726,778 | +4.2% | 181,282 | 9.53 |
| 2024-11-29 | 1,657,753 | -6.2% | 205,389 | 8.07 |
| 2024-11-15 | 1,766,303 | +3.8% | 389,695 | 4.53 |
| 2024-10-31 | 1,701,256 | -3.8% | 362,753 | 4.69 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 28 October 2026, the short share of VICR volume is 74.8%, up 9.6 points over the last five sessions. Over the last 30 readings it ranged from 26.5% (16 October 2026) to 78.2% (18 September 2026). The latest reading sits at the top of that range. The latest reading is 14.8 points above the 30-session average of 59.9%, on 380K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-28 | 284K | 380K | 74.8% | 245 |
| 2026-10-27 | 316K | 444K | 71.3% | 300 |
| 2026-10-26 | 317K | 460K | 69.1% | 2 |
| 2026-10-23 | 180K | 360K | 50.2% | 13,379 |
| 2026-10-22 | 373K | 629K | 59.3% | 29,202 |
| 2026-10-21 | 453K | 695K | 65.2% | 56 |
| 2026-10-20 | 523K | 746K | 70.1% | 224 |
| 2026-10-19 | 545K | 865K | 62.9% | 35,691 |
| 2026-10-16 | 244K | 921K | 26.5% | 28,084 |
| 2026-10-15 | 373K | 960K | 38.9% | 46,849 |
| 2026-10-14 | 193K | 409K | 47.2% | 0 |
| 2026-10-13 | 279K | 430K | 65.0% | 988 |
| 2026-10-12 | 195K | 326K | 59.7% | 963 |
| 2026-10-09 | 146K | 261K | 55.8% | 12,545 |
| 2026-10-08 | 228K | 534K | 42.7% | 6,858 |
| 2026-10-07 | 187K | 443K | 42.3% | 421 |
| 2026-10-06 | 138K | 292K | 47.4% | 230 |
| 2026-10-05 | 177K | 377K | 46.9% | 181 |
| 2026-10-02 | 229K | 401K | 57.0% | 760 |
| 2026-10-01 | 520K | 763K | 68.2% | 2,676 |
| 2026-09-30 | 141K | 269K | 52.5% | 232 |
| 2026-09-29 | 146K | 217K | 67.4% | 70 |
| 2026-09-28 | 185K | 303K | 61.1% | 30 |
| 2026-09-25 | 266K | 409K | 64.8% | 75 |
| 2026-09-24 | 248K | 404K | 61.4% | 685 |
| 2026-09-23 | 646K | 840K | 76.9% | 1,175 |
| 2026-09-22 | 695K | 1.0M | 68.6% | 1,582 |
| 2026-09-21 | 337K | 455K | 73.9% | 104 |
| 2026-09-18 | 266K | 340K | 78.2% | 140 |
| 2026-09-17 | 588K | 811K | 72.5% | 693 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 22 September 2026, the fails-to-deliver balance in VICR is 4 shares, down 131 shares over the last settlement date. Over the last 30 readings it ranged from 2 shares (10 July 2026) to 123,854 shares (30 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-22 | 4 | $223.90 | $896 |
| 2026-09-21 | 135 | $222.72 | $30K |
| 2026-09-18 | 1,294 | $216.39 | $280K |
| 2026-09-17 | 2,434 | $183.91 | $448K |
| 2026-09-14 | 1,096 | $197.91 | $217K |
| 2026-09-11 | 556 | $178.05 | $99K |
| 2026-09-08 | 1,629 | $188.55 | $307K |
| 2026-09-04 | 2,287 | $178.76 | $409K |
| 2026-08-28 | 204 | $203.64 | $42K |
| 2026-08-27 | 1,688 | $197.23 | $333K |
| 2026-08-06 | 1,963 | $219.08 | $430K |
| 2026-07-29 | 689 | $192.12 | $132K |
| 2026-07-20 | 6,978 | $237.62 | $1.7M |
| 2026-07-17 | 31,698 | $230.41 | $7.3M |
| 2026-07-14 | 105 | $252.16 | $26K |
| 2026-07-13 | 363 | $272.05 | $99K |
| 2026-07-10 | 2 | $277.43 | $555 |
| 2026-07-09 | 100 | $263.16 | $26K |
| 2026-07-07 | 87 | $285.34 | $25K |
| 2026-07-06 | 160 | $282.95 | $45K |
| 2026-06-30 | 123,854 | $366.79 | $45.4M |
| 2026-06-29 | 117,282 | $326.93 | $38.3M |
| 2026-06-24 | 11,259 | $336.12 | $3.8M |
| 2026-06-23 | 90 | $365.53 | $33K |
| 2026-06-22 | 985 | $331.37 | $326K |
| 2026-06-17 | 27 | $320.46 | $9K |
| 2026-06-16 | 60 | $322.41 | $19K |
| 2026-06-10 | 1,726 | $283.48 | $489K |
| 2026-06-05 | 126 | $306.12 | $39K |
| 2026-06-04 | 858 | $330.48 | $284K |
Insider trades
SEC Form 4, newest first. JSONInsiders at VICR reported 50 open-market sells worth $15.4M in the last 90 days and no open-market buys. Latest filing: VINCIARELLI PATRIZIO (Chairman & CEO) on 2026-10-02.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 1K | $313.32 | $411K | 8.3M |
| 2026-10-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 3K | $312.29 | $827K | 8.3M |
| 2026-10-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 3K | $311.42 | $834K | 8.3M |
| 2026-10-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 6K | $310.32 | $2.0M | 8.3M |
| 2026-10-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 877 | $309.10 | $271K | 8.3M |
| 2026-10-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 5K | $308.01 | $1.5M | 8.3M |
| 2026-10-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 1K | $306.93 | $330K | 8.3M |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 400 | $322.02 | $129K | 2K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 300 | $316.26 | $95K | 4K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 100 | $313.20 | $31K | 4K |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 900 | $330.00 | $297K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 1K | $315.78 | $411K | 8.3M |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 201 | $320.18 | $64K | 2K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 299 | $319.67 | $96K | 3K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 400 | $318.30 | $127K | 3K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 500 | $317.32 | $159K | 3K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 300 | $314.84 | $94K | 4K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 100 | $311.83 | $31K | 4K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 272 | $308.49 | $84K | 5K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 200 | $307.08 | $61K | 5K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Exercise or conversion | 2K | $33.96 | $75K | 5K |
| 2026-10-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Exercise or conversion | 856 | $41.61 | $36K | 3K |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 100 | $324.98 | $32K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 600 | $323.37 | $194K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 900 | $322.40 | $290K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 1K | $321.57 | $354K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 2K | $320.10 | $576K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 2K | $319.01 | $542K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 2K | $318.05 | $763K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 2K | $316.86 | $665K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 700 | $314.71 | $220K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 500 | $313.75 | $157K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 400 | $311.81 | $125K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 300 | $311.23 | $93K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 2K | $308.79 | $494K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 2K | $308.24 | $709K | 8.3M |
| 2026-10-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 1K | $307.02 | $399K | 8.3M |
| 2026-09-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 100 | $184.85 | $18K | 2K |
| 2026-09-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 700 | $178.66 | $125K | 2K |
| 2026-09-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 1K | $177.63 | $195K | 3K |
| 2026-09-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 1K | $176.59 | $207K | 4K |
| 2026-09-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Exercise or conversion | 3K | $41.61 | $128K | 5K |
| 2026-08-20 | ANDERSON SAMUEL J | Director | Exercise or conversion | 1K | $32.89 | $40K | 7K |
| 2026-08-20 | ANDERSON SAMUEL J | Director | Exercise or conversion | 200 | $100.00 | $20K | 6K |
| 2026-08-20 | ANDERSON SAMUEL J | Director | Exercise or conversion | 908 | $44.07 | $40K | 6K |
| 2026-08-20 | ANDERSON SAMUEL J | Director | Exercise or conversion | 754 | $53.07 | $40K | 5K |
| 2026-08-20 | ANDERSON SAMUEL J | Director | Exercise or conversion | 331 | $60.37 | $20K | 4K |
| 2026-08-17 | Lavie Zmira | Director | Sell | 908 | $250.00 | $227K | 0 |
| 2026-08-17 | Lavie Zmira | Director | Exercise or conversion | 908 | $44.07 | $40K | 908 |
| 2026-08-17 | ANDERSON SAMUEL J | Director | Sell | 2K | $252.60 | $524K | 4K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 100 | $216.04 | $22K | 2K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 100 | $209.42 | $21K | 4K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 200 | $206.42 | $41K | 4K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 100 | $203.91 | $20K | 5K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 400 | $215.03 | $86K | 2K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 1K | $214.02 | $294K | 2K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 500 | $212.54 | $106K | 4K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 100 | $201.62 | $20K | 5K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 200 | $200.06 | $40K | 5K |
| 2026-08-03 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Exercise or conversion | 3K | $41.61 | $128K | 5K |
| 2026-07-24 | EICHTEN ESTIA J | Director | Exercise or conversion | 1K | $47.15 | $50K | 105K |
| 2026-07-24 | EICHTEN ESTIA J | Director | Exercise or conversion | 2K | $31.05 | $50K | 104K |
| 2026-07-24 | EICHTEN ESTIA J | Director | Exercise or conversion | 731 | $68.48 | $50K | 102K |
| 2026-07-24 | EICHTEN ESTIA J | Director | Exercise or conversion | 3K | $19.35 | $50K | 101K |
| 2026-07-23 | Lavie Zmira | Director | Sell | 1K | $224.72 | $273K | 0 |
| 2026-07-23 | Lavie Zmira | Director | Exercise or conversion | 1K | $32.89 | $40K | 1K |
| 2026-07-06 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $303.31 | $61K | 8.3M |
| 2026-07-06 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 500 | $302.04 | $151K | 8.3M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 400 | $350.54 | $140K | 8.3M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $344.64 | $69K | 8.3M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $339.75 | $68K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $335.40 | $67K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 500 | $334.40 | $167K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 600 | $328.29 | $197K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $324.20 | $65K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $321.04 | $64K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 428 | $347.44 | $149K | 8.3M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 372 | $346.63 | $129K | 8.3M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 297 | $342.94 | $102K | 8.3M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 503 | $341.65 | $172K | 8.3M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 100 | $338.17 | $34K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 960 | $332.99 | $320K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 240 | $331.50 | $80K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 600 | $323.02 | $194K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $318.86 | $64K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 400 | $315.29 | $126K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 1K | $314.69 | $409K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 500 | $313.05 | $157K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 4K | $311.99 | $1.2M | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 4K | $310.82 | $1.3M | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 2K | $310.13 | $642K | 8.4M |
| 2026-07-02 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 1K | $309.15 | $418K | 8.4M |
| 2026-07-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 200 | $364.51 | $73K | 2K |
| 2026-07-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 300 | $358.62 | $108K | 3K |
| 2026-07-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 400 | $357.62 | $143K | 3K |
| 2026-07-01 | Davies Philip D | Corp. VP-Global Sales & Mktg. | Sell | 300 | $353.31 | $106K | 4K |
| 2026-07-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $366.69 | $73K | 8.4M |
| 2026-07-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 200 | $365.50 | $73K | 8.4M |
| 2026-07-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 880 | $364.50 | $321K | 8.4M |
| 2026-07-01 | VINCIARELLI PATRIZIO | Chairman & CEO | Sell | 322 | $362.97 | $117K | 8.4M |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON50 Form 144 notices on file for VICR worth $202.5M at the prices reported; 5 in the last 90 days worth $15.3M. Latest: PATRIZIO VINCIARELLI filed on 2026-10-02 to sell 20,000 shares ($6.2M) from 2026-10-02.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-10-02 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.2M | 0.058% | 2026-10-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-10-01 | PHILIP D DAVIESDirector, Officer | 9K | $2.7M | 0.027% | 2026-10-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-10-01 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $5.8M | 0.058% | 2026-10-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-17 | ZMIRA LAVIEDirector | 908 | $227K | 0.003% | 2026-08-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-03 | Samuel AndersonDirector | 2K | $440K | 0.006% | 2026-08-11 | UBS Financial Services Inc |
| 2026-07-23 | ZMIRA LAVIEDirector | 1K | $273K | 0.004% | 2026-07-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-06 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 700 | $198K | 0.002% | 2026-07-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-02 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $7.0M | 0.059% | 2026-07-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-01 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $7.6M | 0.059% | 2026-07-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-01 | PHILIP D DAVIESDirector, Officer | 9K | $3.5M | 0.027% | 2026-07-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-30 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $7.3M | 0.059% | 2026-06-30 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-29 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.5M | 0.059% | 2026-06-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-26 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.6M | 0.059% | 2026-06-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-25 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.4M | 0.059% | 2026-06-25 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-24 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.7M | 0.059% | 2026-06-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-23 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $7.3M | 0.059% | 2026-06-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-22 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.6M | 0.059% | 2026-06-22 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-22 | JAMES SCHMIDTDirector, Officer | 4K | $1.4M | 0.012% | 2026-06-22 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-18 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.5M | 0.059% | 2026-06-18 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-17 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.4M | 0.059% | 2026-06-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-16 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.4M | 0.059% | 2026-06-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-15 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.1M | 0.059% | 2026-06-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-12 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.0M | 0.059% | 2026-06-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-11 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $5.5M | 0.059% | 2026-06-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-11 | CLAUDIO TUOZZOLOOfficer, Director | 730 | $214K | 0.002% | 2026-06-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-10 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $5.7M | 0.059% | 2026-06-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-09 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $5.5M | 0.059% | 2026-06-09 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-08 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $5.4M | 0.059% | 2026-06-08 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-05 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.1M | 0.059% | 2026-06-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-05 | SEAN CRILLYOfficer | 3K | $706K | 0.007% | 2026-06-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-04 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.6M | 0.059% | 2026-06-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-03 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.7M | 0.059% | 2026-06-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-02 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.6M | 0.059% | 2026-06-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-01 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.7M | 0.059% | 2026-06-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-29 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.8M | 0.059% | 2026-05-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-28 | PATRIZIO VINCIARELLIDirector, Officer, 10% Stockholder | 20K | $6.9M | 0.059% | 2026-05-28 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-27 | NANCY GRAVAOfficer | 323 | $115K | 0.001% | 2026-05-27 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-26 | CLAUDIO TUOZZOLOOfficer, Director | 3K | $985K | 0.009% | 2026-05-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-26 | ROBERT GENDRONOfficer | 5K | $1.5M | 0.013% | 2026-05-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-26 | ANDREW D'AMICOOfficer | 504 | $163K | 0.001% | 2026-05-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-14 | ANDREW D'AMICOOfficer | 800 | $252K | 0.002% | 2026-05-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-13 | ALEX GUSINOVOfficer | 2K | $451K | 0.004% | 2026-05-13 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-13 | ANDREW D'AMICOOfficer | 1K | $375K | 0.004% | 2026-05-13 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-12 | AL J DOYLEOfficer | 4K | $1.2M | 0.012% | 2026-05-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-11 | CLAUDIO TUOZZOLOOfficer, Director | 9K | $2.7M | 0.027% | 2026-05-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-11 | KEMBLE MORRISONOfficer | 2K | $698K | 0.007% | 2026-05-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-11 | MICHAEL S MCNAMARAOfficer, Director | 19K | $5.8M | 0.055% | 2026-05-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-11 | QUENTIN FENDELETOfficer | 5K | $1.5M | 0.015% | 2026-05-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-06 | CLAUDIO TUOZZOLOOfficer, Director | 6K | $1.7M | 0.018% | 2026-05-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-06 | QUENTIN FENDELETOfficer | 5K | $1.4M | 0.015% | 2026-05-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON2 holders report 5% or more of VICR in their latest filing, all on Schedule 13G (passive). The largest reported stake is T. Rowe Price Associates, Inc. at 12.8% of the class (4,384,882 shares), filed 2026-09-08 for an event on 2026-08-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-09-08 | 13G/Ano. 2 | T. Rowe Price Associates, Inc.investment adviser | 4.4M | 12.8% | 2026-08-31 |
| 2026-09-03 | 13G/Ano. 1 | JPMORGAN CHASE & CO.parent holding company | 1.4M | 4.0% | 2026-08-31 |
| 2026-07-30 | 13G/Ano. 14 | BlackRock, Inc.parent holding company | 2.3M | 6.7% | 2026-06-30 |
| 2026-03-27 | 13G/Ano. 6 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
13F holders
Tracked managers holding VICR at their latest 13F. JSON7 of the 30 tracked managers held VICR at their latest 13F, $219.2M in total at quarter-end prices. AQR Capital Management is the largest at $168.0M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 450K | $168.0M | 0.06% | +301K |
| Millennium Management | 2026-06-30 | 63K | $23.8M | 0.01% | -159K |
| Two Sigma Investments | 2026-06-30 | 22K | $8.4M | 0.01% | +10K |
| Bridgewater Associates | 2026-06-30 | 18K | $7.0M | 0.03% | -15K |
| Citadel Advisors | 2026-06-30 | 13K | $5.1M | 0.00% | -33K |
| Point72 Asset Management | 2026-06-30 | 10K | $3.8M | 0.00% | -19K |
| D. E. Shaw & Co. | 2026-06-30 | 8K | $3.1M | 0.00% | +6K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q1 FY 2026 (quarter ended 2026-03-31) Vicor reported revenue of $113.0M, up 20.2% from the same quarter a year earlier, and net income of $20.7M (0.44 diluted EPS). In FY 2025 it generated $139.5M of operating cash flow and spent $35.2M on buybacks.
- Cash
- $404.2M
- Equity
- $753.9M
- Total assets
- $804.9M
- Shares outstanding
- 26,978,949
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q1 FY 2026 | 2026-03-31 | $113.0M | $20.7M | 18.3% | 0.44 |
| Q4 FY 2025derived | 2025-12-31 | -$190.0M | $46.5M | n/a | n/a |
| Q3 FY 2025 | 2025-09-30 | $407.7M | $28.3M | 6.9% | 0.63 |
| Q2 FY 2025 | 2025-06-30 | $96.0M | $41.2M | 42.9% | 0.91 |
| Q1 FY 2025 | 2025-03-31 | $94.0M | $2.5M | 2.7% | 0.06 |
| Q4 FY 2024derived | 2024-12-31 | $96.2M | $10.2M | 10.7% | n/a |
| Q3 FY 2024 | 2024-09-30 | $93.2M | $11.6M | 12.4% | 0.26 |
| Q2 FY 2024 | 2024-06-30 | $85.9M | -$1.2M | -1.4% | -0.03 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $407.7M | $118.6M | $139.5M | $20.3M | $35.2M | n/a |
| FY 2024 | 2024-12-31 | $359.1M | $6.1M | $50.8M | $23.6M | $497K | n/a |
| FY 2023 | 2023-12-31 | $405.1M | $53.6M | $74.5M | $33.5M | $0 | n/a |
| FY 2022 | 2022-12-31 | $399.1M | $25.4M | $22.9M | $64.0M | $0 | n/a |
| FY 2021 | 2021-12-31 | $359.4M | $56.6M | $54.4M | $47.8M | n/a | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-03-31; shares outstanding as of 2015-04-24 from the cover page.
What this page is
Vicor in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Vicor (VICR), SEC CIK 751978, listed on Nasdaq, classified by the SEC as electronic components, nec. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-28.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-22.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-10-02.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-09-08.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-03-31.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-10-20.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-02.JSON and CSV
- Company record
- EDGAR filing index for CIK 751978Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as electronic components, nec
Other company pages
Datasets
Frequently Asked Questions
How much of VICR is sold short?
2,263,509 shares were held short at the 2026-10-15 settlement, 2.3 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is VICR's daily short volume?
On 2026-10-28, 283,784 of the 379,576 VICR shares reported to FINRA were sold short, 74.8% of the day's reported volume. Short volume is a flow for one day, not a position.
Does VICR have fails to deliver?
The SEC's latest file shows 4 VICR shares failed to deliver at settlement 2026-09-22. Fails are reported per settlement date and published twice a month with a lag.
Are VICR insiders buying or selling?
Insiders at VICR reported 50 open-market sells worth $15.4M in the last 90 days and no open-market buys. Latest filing: VINCIARELLI PATRIZIO (Chairman & CEO) on 2026-10-02.
Have VICR insiders filed to sell?
50 Form 144 notices on file for VICR worth $202.5M at the prices reported; 5 in the last 90 days worth $15.3M. Latest: PATRIZIO VINCIARELLI filed on 2026-10-02 to sell 20,000 shares ($6.2M) from 2026-10-02.
Who owns 5% or more of VICR?
2 holders report 5% or more of VICR in their latest filing, all on Schedule 13G (passive). The largest reported stake is T. Rowe Price Associates, Inc. at 12.8% of the class (4,384,882 shares), filed 2026-09-08 for an event on 2026-08-31.
What did VICR report last quarter?
In Q1 FY 2026 (quarter ended 2026-03-31) Vicor reported revenue of $113.0M, up 20.2% from the same quarter a year earlier, and net income of $20.7M (0.44 diluted EPS). In FY 2025 it generated $139.5M of operating cash flow and spent $35.2M on buybacks.
Which tracked 13F managers own VICR?
7 of the 30 tracked 13F managers held VICR shares at their latest filing, $219.2M in all. The largest: Cliff Asness's AQR Capital Management (450K shares, $168.0M), Izzy Englander's Millennium Management (63K shares, $23.8M), Two Sigma Investments (22K shares, $8.4M), Ray Dalio's Bridgewater Associates (18K shares, $7.0M), Ken Griffin's Citadel Advisors (13K shares, $5.1M), Steve Cohen's Point72 Asset Management (10K shares, $3.8M). The table above lists all 7.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.