Floyd F. Petersen insider trades: Amphastar Pharmaceuticals (AMPH) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Floyd reports to the SEC
Open-market buys and sales
70 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Dec 12, 2025 | AMPH | ↓ Sell | 4,163 | $25.82 | $108K | Direct | Dec 15, 2025 (3d) |
| Nov 13, 2025 | AMPH | ↓ Sell | 16,679 | $26.49 | $442K | Direct | Nov 17, 2025 (4d) |
| Nov 3, 2025 | AMPH | ↓ Sell | 500 | $25.27 | $13K | Direct | Nov 5, 2025 (2d) |
| Oct 1, 2025 | AMPH | ↓ Sell | 500 | $27.20 | $14K | Direct | Oct 2, 2025 (1d) |
| Sep 2, 2025 | AMPH | ↓ Sell | 500 | $30.98 | $15K | Direct | Sep 3, 2025 (1d) |
| Aug 1, 2025 | AMPH | ↓ Sell | 500 | $20.83 | $10K | Direct | Aug 4, 2025 (3d) |
| Jul 2, 2025 | AMPH | ↓ Sell | 500 | $23.47 | $12K | Direct | Jul 3, 2025 (1d) |
| Jun 2, 2025 | AMPH | ↓ Sell | 500 | $25.67 | $13K | Direct | Jun 4, 2025 (2d) |
| May 1, 2025 | AMPH | ↓ Sell | 500 | $24.08 | $12K | Direct | May 2, 2025 (1d) |
| Apr 1, 2025 | AMPH | ↓ Sell | 500 | $28.38 | $14K | Direct | Apr 2, 2025 (1d) |
| Mar 6, 2025 | AMPH | ↓ Sell | 1,000 | $27.99 | $28K | Direct | Mar 7, 2025 (1d) |
| Sep 5, 2024 | AMPH | ↓ Sell | 3,000 | $46.47 | $139K | Direct | Sep 6, 2024 (1d) |
| Jun 10, 2024 | AMPH | ↓ Sell | 3,000 | $41.40 | $124K | Direct | Jun 11, 2024 (1d) |
| Jun 3, 2024 | AMPH | ↓ Sell | 500 | $42.65 | $21K | Direct | Jun 5, 2024 (2d) |
| May 1, 2024 | AMPH | ↓ Sell | 500 | $41.67 | $21K | Direct | May 2, 2024 (1d) |
| Apr 1, 2024 | AMPH | ↓ Sell | 500 | $43.43 | $22K | Direct | Apr 2, 2024 (1d) |
| Mar 1, 2024 | AMPH | ↓ Sell | 500 | $45.69 | $23K | Direct | Mar 4, 2024 (3d) |
| Feb 1, 2024 | AMPH | ↓ Sell | 500 | $53.10 | $27K | Direct | Feb 2, 2024 (1d) |
| Jan 2, 2024 | AMPH | ↓ Sell | 500 | $61.37 | $31K | Direct | Jan 3, 2024 (1d) |
| Dec 1, 2023 | AMPH | ↓ Sell | 500 | $57.90 | $29K | Direct | Dec 4, 2023 (3d) |
| Nov 1, 2023 | AMPH | ↓ Sell | 500 | $45.30 | $23K | Direct | Nov 2, 2023 (1d) |
| Oct 2, 2023 | AMPH | ↓ Sell | 500 | $45.78 | $23K | Direct | Oct 3, 2023 (1d) |
| May 17, 2023 | AMPH | ↓ Sell | 5,000 | $43.13 | $216K | Direct | May 18, 2023 (1d) |
| Apr 3, 2023 | AMPH | ↓ Sell | 491 | $37.72 | $19K | Direct | Apr 4, 2023 (1d) |
| Mar 1, 2023 | AMPH | ↓ Sell | 500 | $36.70 | $18K | Direct | Mar 2, 2023 (1d) |
| Feb 1, 2023 | AMPH | ↓ Sell | 500 | $30.35 | $15K | Direct | Feb 2, 2023 (1d) |
| Jan 3, 2023 | AMPH | ↓ Sell | 500 | $27.94 | $14K | Direct | Jan 4, 2023 (1d) |
| Dec 1, 2022 | AMPH | ↓ Sell | 500 | $30.13 | $15K | Direct | Dec 2, 2022 (1d) |
| Nov 1, 2022 | AMPH | ↓ Sell | 500 | $31.13 | $16K | Direct | Nov 2, 2022 (1d) |
| Oct 3, 2022 | AMPH | ↓ Sell | 500 | $28.59 | $14K | Direct | Oct 4, 2022 (1d) |
| Sep 1, 2022 | AMPH | ↓ Sell | 500 | $29.44 | $15K | Direct | Sep 2, 2022 (1d) |
| Aug 1, 2022 | AMPH | ↓ Sell | 500 | $37.48 | $19K | Direct | Aug 2, 2022 (1d) |
| Jul 1, 2022 | AMPH | ↓ Sell | 500 | $34.78 | $17K | Direct | Jul 5, 2022 (4d) |
| Jun 1, 2022 | AMPH | ↓ Sell | 500 | $37.00 | $18K | Direct | Jun 2, 2022 (1d) |
| May 18, 2022 | AMPH | ↓ Sell | 9,924 | $35.05 | $348K | Direct | May 19, 2022 (1d) |
| May 2, 2022 | AMPH | ↓ Sell | 295 | $35.18 | $10K | Direct | May 3, 2022 (1d) |
| Apr 1, 2022 | AMPH | ↓ Sell | 500 | $36.69 | $18K | Direct | Apr 4, 2022 (3d) |
| Mar 1, 2022 | AMPH | ↓ Sell | 500 | $27.27 | $14K | Direct | Mar 1, 2022 (0d) |
| Feb 1, 2022 | AMPH | ↓ Sell | 500 | $24.08 | $12K | Direct | Feb 2, 2022 (1d) |
| Jan 3, 2022 | AMPH | ↓ Sell | 500 | $23.22 | $12K | Direct | Jan 4, 2022 (1d) |
| Dec 22, 2021 | AMPH | ↓ Sell | 1,000 | $22.50 | $23K | Direct | Dec 23, 2021 (1d) |
| Jun 7, 2021 | AMPH | ↓ Sell | 15,827 | $19.34 | $306K | Direct | Jun 8, 2021 (1d) |
| Jun 3, 2021 | AMPH | ↓ Sell | 10,000 | $18.65 | $187K | Direct | Jun 4, 2021 (1d) |
| Feb 1, 2021 | AMPH | ↓ Sell | 639 | $18.26 | $12K | Direct | Feb 2, 2021 (1d) |
| Dec 1, 2020 | AMPH | ↓ Sell | 500 | $17.87 | $9K | Direct | Dec 2, 2020 (1d) |
| Nov 2, 2020 | AMPH | ↓ Sell | 500 | $19.84 | $10K | Direct | Nov 3, 2020 (1d) |
| Oct 1, 2020 | AMPH | ↓ Sell | 500 | $18.89 | $9K | Direct | Oct 2, 2020 (1d) |
| Sep 1, 2020 | AMPH | ↓ Sell | 500 | $19.90 | $10K | Direct | Sep 2, 2020 (1d) |
| Aug 3, 2020 | AMPH | ↓ Sell | 500 | $20.62 | $10K | Direct | Aug 4, 2020 (1d) |
| Jul 1, 2020 | AMPH | ↓ Sell | 500 | $22.27 | $11K | Direct | Jul 2, 2020 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other AMPH insiders
Open-market trades in the last 12 months
About Floyd F. Petersen's insider trades
Floyd F. Petersen is an insider at Amphastar Pharmaceuticals (AMPH). Since Aug 15, 2014, Floyd has reported 1 open-market purchase worth $33K and 69 sales worth $4.8M on SEC Form 4. In the last 12 months: 2 sales ($549K).
Their filings also include grants and awards (11 filings), option exercises (9 filings), shares returned to the company (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every AMPH insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.