American Superconductor (AMSC) CFO sells 36,909 shares under 10b5-1 plan
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
American Superconductor (AMSC) SVP, CFO & Treasurer John W. Kosiba Jr. reported both a stock grant and planned share sales. On June 1, 2026, he received a restricted stock award of 30,000 common shares, which will vest in three equal annual installments beginning June 10, 2027.
On June 2–3, 2026, he sold 36,909 common shares in multiple open-market transactions at weighted average prices around the high-$40s to low-$50s per share. A footnote states these sales were made to cover tax withholding obligations related to vesting of restricted stock awards and were executed under a pre-arranged Rule 10b5-1 trading plan adopted on August 15, 2025. After these transactions, he holds 345,981 common shares directly and 320 shares indirectly through the company’s 401(k) plan as of June 3, 2026.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Net Seller: 36,909 shares ($1,862,034)
Net Sell
9 txns
Insider
Kosiba John W JR
Role
SVP, CFO & Treasurer
Sold
36,909 shs ($1.86M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Stock | 3,200 | $48.3069 | $155K |
| Sale | Common Stock | 2,638 | $49.2846 | $130K |
| Sale | Common Stock | 609 | $50.8258 | $31K |
| Sale | Common Stock | 5,704 | $49.461 | $282K |
| Sale | Common Stock | 12,122 | $50.6188 | $614K |
| Sale | Common Stock | 12,036 | $51.466 | $619K |
| Sale | Common Stock | 600 | $52.1917 | $31K |
| Grant/Award | Common Stock | 30,000 | $0.00 | -- |
| holding | Common Stock | -- | -- | -- |
Holdings After Transaction:
Common Stock — 349,228 shares (Direct, null);
Common Stock — 320 shares (Indirect, By 401(k) plan)
Footnotes (1)
- The restricted stock award was granted on June 1, 2026. The award will vest in three equal annual installments beginning June 10, 2027. Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025. The sales were executed in multiple trades at prices ranging from $48.95-$49.87. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected. The sales were executed in multiple trades at prices ranging from $49.99-$50.95. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected. The sales were executed in multiple trades at prices ranging from $50.99-$51.90. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected. The sales were executed in multiple trades at prices ranging from $52.00-$52.37. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected. The sales were executed in multiple trades at prices ranging from $47.80-$48.76. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected. The sales were executed in multiple trades at prices ranging from $48.87-$49.62. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected. The sales were executed in multiple trades at prices ranging from $50.35-$50.99. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected. Following all the transactions reported on this Form 4, the reporting person holds 345,981 shares directly. Following all the transactions reported on this Form 4, the reporting person holds 320 shares indirectly through the company's 401(k) plan as of June 3, 2026.
Key Figures
Shares sold: 36,909 shares
Restricted stock grant: 30,000 shares
Direct holdings after transactions: 345,981 shares
+5 more
8 metrics
Shares sold
36,909 shares
Total common shares sold in open-market transactions on June 2–3, 2026
Restricted stock grant
30,000 shares
Common stock award granted on June 1, 2026
Direct holdings after transactions
345,981 shares
Direct common stock holdings following all reported transactions
Indirect 401(k) holdings
320 shares
Common stock held indirectly through company 401(k) plan as of June 3, 2026
Highest reported average sale price
$52.1917 per share
Weighted average sale price for a 600-share transaction on June 2, 2026
Lowest reported average sale price
$48.3069 per share
Weighted average sale price for a 3,200-share transaction on June 3, 2026
Plan adoption date
August 15, 2025
Date CFO entered Rule 10b5-1 trading plan used for reported sales
Vesting start date
June 10, 2027
First vesting date for 30,000-share restricted stock award, in three annual installments
Key Terms
restricted stock award, Rule 10b5-1 trading plan, tax withholding obligations, weighted average sale price, +1 more
5 terms
restricted stock award financial
"The restricted stock award was granted on June 1, 2026."
A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.
Rule 10b5-1 trading plan regulatory
"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025."
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
tax withholding obligations financial
"Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards."
weighted average sale price financial
"The price reported above reflects the weighted average sale price."
vesting financial
"The award will vest in three equal annual installments beginning June 10, 2027."
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
FAQ
What insider transactions did AMSC CFO John W. Kosiba Jr. report?
AMSC CFO John W. Kosiba Jr. reported a 30,000-share restricted stock award and sales of 36,909 common shares. The sales occurred on June 2–3, 2026, as open-market transactions, primarily to cover tax withholding on vested restricted stock awards.
What stock award did AMSC grant its CFO on June 1, 2026?
On June 1, 2026, AMSC granted the CFO a restricted stock award of 30,000 common shares. The grant vests in three equal annual installments starting June 10, 2027, aligning compensation with longer-term company performance and retention.