Zhou Rong insider trades
Zhou Rong has filed 35 Form 4s with the SEC that we hold, all for Amphastar Pharmaceuticals, Inc. (AMPH), as SENIOR EVP, PRODUCTION CENTER. Across all of them we count 0 purchases worth $0 and 21 sales worth $5.0M reported on Form 4. In the last 12 months: 0 purchases ($0) and 3 sales ($571.1K). The largest single trade was a sale of 10,000 shares of Amphastar Pharmaceuticals, Inc. worth $442.1K, dated 2023-05-18. Of 2 sales filed since we began reading the 10b5-1 checkbox, 0 (0%) were marked as made under a 10b5-1 trading plan. The first filing on our record is dated 2021-07-22 and the latest 2026-09-17.
Amphastar Pharmaceuticals, Inc. (AMPH)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-07-20 | S, sale reported on Form 4 | 5,187 | $106.7K | 2021-07-22 |
| 2021-07-26 | S, sale reported on Form 4 | 6,000 | $125.2K | 2021-07-27 |
| 2021-08-02 | S, sale reported on Form 4 | 9,123 | $193.8K | 2021-08-04 |
| 2021-11-11 | S, sale reported on Form 4 | 7,813 | $169.3K | 2021-11-12 |
| 2022-01-10 | S, sale reported on Form 4 | 10,677 | $266.5K | 2022-01-11 |
| 2022-01-10 | S, sale reported on Form 4 | 10,251 | $264.2K | 2022-01-11 |
| 2022-02-08 | S, sale reported on Form 4 | 7,000 | $187.4K | 2022-02-09 |
| 2022-02-25 | S, sale reported on Form 4 | 13,246 | $381.1K | 2022-03-01 |
| 2023-05-18 | S, sale reported on Form 4 | 10,000 | $442.1K | 2023-05-19 |
| 2023-06-13 | S, sale reported on Form 4 | 5,000 | $241.2K | 2023-06-14 |
| 2023-06-15 | S, sale reported on Form 4 | 5,000 | $258.9K | 2023-06-20 |
| 2023-12-01 | S, sale reported on Form 4 | 4,316 | $252.8K | 2023-12-05 |
| 2023-12-04 | S, sale reported on Form 4 | 3,514 | $209.4K | 2023-12-05 |
| 2024-08-26 | S, sale reported on Form 4 | 4,000 | $193.4K | 2024-08-27 |
| 2024-09-13 | S, sale reported on Form 4 | 3,000 | $144.8K | 2024-09-17 |
| 2024-11-12 | S, sale reported on Form 4 | 6,893 | $336.9K | 2024-11-13 |
| 2024-12-12 | S, sale reported on Form 4 | 7,000 | $311.0K | 2024-12-16 |
| 2024-12-13 | S, sale reported on Form 4 | 8,000 | $361.8K | 2024-12-16 |
| 2025-12-17 | S, sale reported on Form 4 | 9,787 | $256.4K | 2025-12-18 |
| 2026-09-02 | S, sale reported on Form 4 | 3,187 | $75.3K | 2026-09-03 |
| 2026-09-16 | S, sale reported on Form 4 | 10,000 | $239.4K | 2026-09-17 |
Counted from the Form 4 filings this reporting owner (SEC CIK 1645326) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
Privacy · Terms