VICR · Vicor Corp

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $209.4200 to $209.4200.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $213.5200 to $214.5000.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $200.0500 to $200.0600.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $203.9100 to $203.9100.

Granted under the Company's Amended and Restated 2000 Stock Option and Incentive Plan on May 2, 2023 and vest over a five year period.

Options expire two years from each vest date.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $216.0400 to $216.0400.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $206.0600 to $206.7800.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $212.1800 to $212.9900.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $201.6200 to $201.6200.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $214.8500 to $215.1500.

Granted under the Company's Amended and Restated 2000 Stock Option and Incentive Plan on June 28, 2019 and vest over a five year period.

Granted under the Company's Amended and Restated 2000 Stock Option and Incentive Plan on June 26, 2020 and vest over a five year period.

Granted under the Company's Amended and Restated 2000 Stock Option and Incentive Plan on June 16, 2017 and vest over a five year period.

Granted under the Company's Amended and Restated 2000 Stock Option and Incentive Plan on June 15, 2018 and vest over a five year period.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $302.0000 and $302.1800. The reporting person undertakes to provide to Vicor Corporation, any security holder of Vicor Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) through (4) to this Form 4.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $303.2100 and $303.4200.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $309.5000 and $310.4900.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $318.8400 and $318.8700.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.3400 and $332.2700.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.5000 and $309.4950. The reporting person undertakes to provide to Vicor Corporation, any security holder of Vicor Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) through (26) to this Form 4.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.2800 and $315.2900.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.1500 and $335.0000.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $350.5200 and $350.5600.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.1900 and $324.2200.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.6200 and $323.2100.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $312.6700 and $313.4850.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.4400 and $342.3300.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $347.3200 and $347.7000.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.3100 and $335.5000.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $311.5000 and $312.2800.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.4900 and $340.0600.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.5400 and $343.1300.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.9700 and $314.8700.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $346.3200 and $347.0100.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $310.5000 and $311.4900.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.9800 and $321.4500.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.4300 and $333.3700.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $344.6200 and $344.6600.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.1800 and $328.5000.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.1700 and $338.1700.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.6800 and $362.5700.

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $357.4400 and $358.4300.