undamentalytics Newsletter

Tuozzolo Claudio: insider trades

Officer, Director at Vicor Corp. No open-market purchases and 50 sales not made under a pre-set plan, reported from April 29, 2010 to June 12, 2026.

What happened after Tuozzolo Claudio’s sales?

After their sales, the shares moved +18.0% against the index over 12 months on average (a negative figure means selling was the right call); 44% trailed it.

With 296 insiders tested, some will look skilled or unskilled by chance alone: when we replaced each insider’s stocks with random companies bought on the same days, about 5.7 cleared the bar ahead and 23.3 behind. One record on its own proves little.

Trade by trade

Tuozzolo Claudio: trades against the S&P 500 afterwards
MeasuredTrades countedAverage vs S&P 500MedianWent the right wayYearst-statisticp-valueEvidence
Purchases, 3 months after the report 0 — — — — — — Not enough years
Purchases, 6 months after the report 0 — — — — — — Not enough years
Purchases, 12 months after the report 0 — — — — — — Not enough years
Purchases, 12 months after the trade 0 — — — — — — Not enough years
Sales, 3 months after the report 50 +9.2% +9.3% 42% 11 0.25 0.81 No reliable evidence
Sales, 12 months after the report 41 +18.0% +3.8% 44% 10 0.72 0.49 No reliable evidence
Sales, 12 months after the trade 41 +17.7% +1.8% 46% 10 0.79 0.45 No reliable evidence

“Average vs S&P 500” is the stock’s return including dividends minus the index’s over the same dates, from the close on the first trading day after the report, or from the close on the trade date. Only windows that have finished are counted. For sales, a negative figure means the stock lagged after it was sold, so selling was the right call (green). “Went the right way” is the share of purchases that beat the index, or of sales that trailed it. The t-statistic uses one average per year of reports, because one person’s trades bunch into the same stock and weeks, and needs trades in at least four different years; the p-value comes from the t distribution with that number of years (with four years, a t of 2 has p = 0.14). “Some evidence” means p under 5%, “strong evidence” p under 1% over at least six years.

Companies traded

CompanyTitle on the latest filingPurchasesSalesFirst reportLatest report
Vicor Corp VICR Corp. Vice President050April 29, 2010June 12, 2026

Trades and what followed

Moves are against the S&P 500; green means the trade went the insider’s way.

ReportedTradedCompanyTradeValue3 months after report12 months after report12 months after trade
June 12, 2026June 11, 2026 VICR Sale $213,810 −43.5%not yetnot yet
May 28, 2026May 26, 2026 VICR Sale $985,230 −45.9%not yetnot yet
May 12, 2026May 11, 2026 VICR Sale $2,736,976 −31.8%not yetnot yet
May 8, 2026May 6, 2026 VICR Sale $1,698,135 −37.1%not yetnot yet
April 27, 2026April 24, 2026 VICR Sale $2,985,044 −29.3%not yetnot yet
February 26, 2026February 25, 2026 VICR Sale $918,643 +55.7%not yetnot yet
February 25, 2026February 24, 2026 VICR Sale $950,278 +56.6%not yetnot yet
February 24, 2026February 23, 2026 VICR Sale $780,287 +66.8%not yetnot yet
November 13, 2025November 12, 2025 VICR Sale $605,690 +72.4%not yetnot yet
October 28, 2025October 24, 2025 VICR Sale $498,860 +72.0%+98.5%+119.5%
October 27, 2025October 23, 2025 VICR Sale $1,344,555 +90.0%+117.3%+94.3%
February 28, 2025February 26, 2025 VICR Sale $122,964 −30.7%+216.4%+194.5%
February 26, 2025February 24, 2025 VICR Sale $213,739 −31.8%+220.5%+209.3%
November 8, 2024November 7, 2024 VICR Sale $171,123 −20.4%+31.8%+44.6%
July 31, 2023July 27, 2023 VICR Sale $520,288 −46.1%−75.7%−79.8%
November 16, 2021November 15, 2021 VICR Sale $150,423 −33.1%−53.5%−51.7%
November 2, 2021October 29, 2021 VICR Sale $172,919 −37.5%−49.8%−53.9%
September 20, 2021September 16, 2021 VICR Sale $117,335 −15.3%−39.8%−39.5%
September 15, 2021September 13, 2021 VICR Sale $239,833 −12.3%−39.5%−37.7%
September 13, 2021September 9, 2021 VICR Sale $140,954 −10.7%−38.3%−36.5%
August 6, 2021August 4, 2021 VICR Sale $119,889 +21.9%−34.8%−31.5%
July 27, 2021July 26, 2021 VICR Sale $1,029,131 +31.3%−28.7%−28.1%
March 15, 2021March 12, 2021 VICR Sale $191,014 −8.9%−34.1%−30.5%
March 2, 2021March 1, 2021 VICR Sale $761,245 −11.8%−34.3%−39.7%
December 16, 2020December 15, 2020 VICR Sale $161,725 −10.8%+5.0%+1.3%
December 9, 2020December 8, 2020 VICR Sale $99,400 +6.3%+9.7%+17.2%
September 17, 2020September 15, 2020 VICR Sale $1,065,255 +3.3%+23.9%+19.2%
September 11, 2020September 9, 2020 VICR Sale $1,369,962 −7.6%+20.3%+12.8%
June 9, 2020June 5, 2020 VICR Sale $202,166 +20.5%+3.8%+3.9%
June 5, 2020June 3, 2020 VICR Sale $401,678 +18.8%+11.1%+2.8%
June 3, 2020June 1, 2020 VICR Sale $315,719 +21.8%+3.6%+14.5%
May 28, 2020May 26, 2020 VICR Sale $341,256 +23.1%+7.5%+11.1%
May 21, 2020May 20, 2020 VICR Sale $196,218 +21.2%+5.0%+1.8%
May 20, 2020May 18, 2020 VICR Sale $527,559 +25.4%+8.2%−1.7%
May 13, 2020May 12, 2020 VICR Sale $152,826 +38.4%+0.4%−3.2%
May 12, 2020May 8, 2020 VICR Sale $226,616 +36.5%−1.9%+2.8%
April 30, 2020April 28, 2020 VICR Sale $491,885 +41.9%+20.3%+37.0%
December 16, 2019December 12, 2019 VICR Sale $150,701 +7.7%+92.4%+78.5%
December 5, 2019December 3, 2019 VICR Sale $27,418 +10.9%+86.6%+79.7%
November 15, 2019November 14, 2019 VICR Sale $290,070 +32.4%+83.6%+80.2%
October 30, 2019October 29, 2019 VICR Sale $333,283 +32.4%+104.8%+109.4%
September 16, 2019September 13, 2019 VICR Sale $314,672 +24.9%+134.9%+131.0%
June 19, 2018June 4, 2018 VICR Sale $337,543 +2.4%−45.9%−37.4%
May 16, 2018May 15, 2018 VICR Sale $116,550 +47.5%−27.7%−23.0%
May 9, 2018May 7, 2018 VICR Sale $180,000 +60.4%−18.9%−11.8%
April 28, 2017April 27, 2017 VICR Sale $92,050 −5.0%+80.7%+84.2%
February 27, 2015February 26, 2015 VICR Sale $65,200 −9.3%−38.0%−33.2%
October 26, 2010October 25, 2010 VICR Sale $53,872 −28.7%−55.0%−52.0%
August 4, 2010August 3, 2010 VICR Sale $39,975 +14.2%−27.4%−29.3%
April 29, 2010April 27, 2010 VICR Sale $101,610 +13.1%−4.2%−3.2%

Open-market purchases and sales of at least $10,000 in companies we cover, from SEC Form 4 filings; sales made under a pre-set Rule 10b5-1 plan are not shown. “Not yet” means the window has not finished or the share price was under $5 at entry. These are the shares’ moves after each trade: they say nothing about why Tuozzolo Claudio traded and do not suggest the use of non-public information. How every insider compares · the insider trading backtest.