The transaction, executed under a Rule 10b5-1 plan, reduces Karpinski’s direct holdings while leaving her with a substantial stake in the company.

February 26, 2026

Advanced Energy Industries’ top legal officer sold nearly 1,000 shares of company stock last week, according to a regulatory disclosure filed with the Securities and Exchange Commission.

Vonne Elizabeth Karpinski, who serves as Executive Vice President and General Counsel at Advanced Energy Industries (AEIS), executed the sale on February 23, 2026. The transaction involved 964 shares sold at approximately $328.42 per share, alongside a nominal fractional sale of less than one share at roughly $329.76.

A Preplanned Transaction

The trades were carried out under a preplanned Rule 10b5-1 trading arrangement that Karpinski established in November 2025. These plans allow corporate insiders to schedule stock sales in advance, providing a legal safe harbor that shields them from accusations of trading on nonpublic information.

Remaining Stake

Following the transactions, Karpinski retains direct ownership of 11,683 shares in the Denver-based power technology company. That total is composed of two components:

• 3,065 unvested restricted stock units
• 8,618 shares of common stock

Together, these holdings reflect a meaningful ongoing financial stake in the firm’s performance.

About Advanced Energy Industries

Advanced Energy Industries, headquartered in Denver, Colorado, designs and manufactures precision power conversion and control solutions used in semiconductor manufacturing and other industrial applications. The company trades on the Nasdaq under the ticker AEIS.

The disclosure was signed and submitted on February 24, 2026, one day after the transactions took place.