Amphastar exec Zhou sells 10,000 shares at $23.94
Amphastar’s Senior EVP exercised 10,000 options and sold 10,000 common shares on September 16, 2026, in a net-sell Form 4 transaction.
Rhea-AI Filing Summary
Amphastar Pharmaceuticals, Inc. (AMPH) officer Rong Zhou, Senior EVP, Production Center, exercised options for 10,000 shares of common stock on September 16, 2026 at an exercise price of $13.35 per share and sold 10,000 shares the same day at a weighted average price of $23.94. Following the option exercise, Zhou held 19,424 stock options directly, and also has indirect ownership interests in common shares held by the Zhou Family Trust and by the reporting person’s spouse.
Positive
- None.
Negative
- None.
Insider Trade Summary
Exercise and Sale: 10,000 shares ($106K approx. pre-tax spread)
Exercise and Sale
5 txns
Insider
Zhou Rong
Role
SENIOR EVP, PRODUCTION CENTER
Sold
10,000 shs ($239K)
Approx. gross sale proceeds
$239K
Approx. exercise cost
$134K
Approx. pre-tax spread
$106K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Employee Stock Option (right to buy) F4 | 10,000 | $0.00 | $0.00 |
| Exercise | Common Stock | 10,000 | $13.35 | $134K |
| Sale | Common Stock F1 | 10,000 | $23.9404 | $239K |
| holding | Common Stock F2 | -- | -- | -- |
| holding | Common Stock F3 | -- | -- | -- |
Holdings After Transaction:
Employee Stock Option (right to buy) — 19,424 contracts (Direct);
Common Stock — 169,203 shares (Direct);
Common Stock — 104,668 shares (Indirect, See footnote)
Footnotes (4)
- F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.83 to $24.05, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
- F2. The shares are held of record by the Zhou Family Trust for which the reporting person serves as a trustee.
- F3. The shares are held of record by the reporting person's spouse.
- F4. Shares subject to the option are fully vested and immediately exercisable.
Key Figures
Options exercised: 10,000 shares
Option exercise price: $13.35 per share
Shares sold: 10,000 shares
+3 more
6 metrics
Options exercised
10,000 shares
Employee Stock Options exercised on September 16, 2026
Option exercise price
$13.35 per share
Exercise price for 10,000 Employee Stock Options
Shares sold
10,000 shares
Common stock sale on September 16, 2026
Weighted average sale price
$23.9404 per share
Sales in a range from $23.83 to $24.05
Options remaining
19,424 shares
Stock options held directly after the option exercise
Net shares sold
10,000 shares
Net of 10,000 shares acquired via exercise and 10,000 sold
Key Terms
Employee Stock Option (right to buy), weighted average price, indirect, fully vested and immediately exercisable
4 terms
Employee Stock Option (right to buy) financial
"Security title reported as Employee Stock Option (right to buy)"
weighted average price financial
"The price reported is a weighted average price for the sale"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
indirect financial
"Common Stock entry marked as indirect with nature of ownership"
fully vested and immediately exercisable financial
"Shares subject to the option are fully vested and immediately exercisable"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did Amphastar (AMPH) executive Rong Zhou report on this Form 4?
Rong Zhou reported exercising 10,000 stock options for Amphastar common stock at $13.35 per share and selling 10,000 shares on September 16, 2026, resulting in a net reported sale of 10,000 shares for that date.
What was the option exercise price reported by Amphastar (AMPH) executive Rong Zhou?
Rong Zhou exercised 10,000 Employee Stock Options at an exercise price of $13.35 per share, converting them into 10,000 shares of Amphastar common stock before selling those shares the same day.
How many Amphastar (AMPH) options does Rong Zhou hold after the reported transactions?
After exercising 10,000 options on September 16, 2026, Rong Zhou directly held 19,424 stock options on Amphastar common stock, all of which are reported as fully vested and immediately exercisable.
Were the Amphastar (AMPH) transactions under a Rule 10b5-1 trading plan?
No. The Form 4’s Rule 10b5-1 checkbox is not marked as affirmative, and no footnote states that the September 16, 2026 transactions were made pursuant to a Rule 10b5-1 trading plan.
What indirect Amphastar (AMPH) holdings are disclosed for Rong Zhou?
The filing states that some Amphastar common shares are held by the Zhou Family Trust, where Rong Zhou serves as trustee, and by the reporting person’s spouse, indicating indirect ownership interests in those share positions.
AI-generated analysis. How Rhea-AI works. Not financial advice.
