Form 4: AMSC CFO John Kosiba Executes Planned Stock Sale

American Superconductor Corporation CFO John W. Kosiba Jr. sold 6,769 shares to cover tax obligations related to restricted stock vesting.

Summary

• John W. Kosiba Jr., SVP, CFO & Treasurer of American Superconductor Corporation (AMSC), sold a total of 6,769 shares of common stock on June 11, 2026.
• The transactions were executed in two tranches: 5,026 shares at a weighted average price of $37.3267 and 1,743 shares at a weighted average price of $37.8516.
• The sales were conducted pursuant to a Rule 10b5-1 trading plan established on August 15, 2025.
• The primary purpose of the sale was to satisfy tax withholding obligations associated with the vesting of restricted stock awards.
• Following these transactions, the reporting person retains direct ownership of 334,377 shares and indirect ownership of 371 shares via a 401(k) plan.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, as the sale was a pre-planned, non-discretionary transaction for tax purposes.

Positives

• The sale was pre-planned under a Rule 10b5-1 trading plan, indicating the transaction was not based on non-public information.
• The transaction was specifically for tax compliance purposes rather than a discretionary divestment of holdings.

Negatives

• The sale reduces the executive's direct equity stake in the company.

Risks

• Market volatility could impact the value of the remaining 334,377 shares held by the CFO.

Future Outlook

No forward-looking guidance regarding company operations was provided in this filing.

Industry Context

StockSavvy.ai notes that routine insider selling to cover tax obligations upon the vesting of equity awards is a standard corporate governance practice and typically does not signal a change in management's outlook on the company's performance.

Comparison to Industry Standards

• The use of Rule 10b5-1 plans is the industry standard for executives to manage equity holdings while avoiding potential conflicts with insider trading regulations.

Stakeholder Impact

• Minimal impact on shareholders as the sale was pre-planned and related to tax obligations.

Next Steps

• No future actions or milestones were disclosed in this filing.

Key Dates

Keywords

AMSC, American Superconductor, Insider Trading, Form 4, CFO, Equity Vesting