William J Peters insider trades: Amphastar Pharmaceuticals (AMPH) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where William reports to the SEC
Open-market buys and sales
69 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Nov 5, 2026 | AMPH | ↓ Sell | 28,631 | $28.45 | $815K | Direct | Nov 6, 2026 (1d) |
| Sep 21, 2026 | AMPH | ↓ Sell | 4,139 | $25.00 | $103K | Direct | Sep 23, 2026 (2d) |
| Aug 7, 2026 | AMPH | ↓ Sell | 8,180 | $22.48 | $184K | Direct | Aug 11, 2026 (4d) |
| Mar 4, 2025 | AMPH | ↓ Sell | 4,231 | $27.54 | $117K | Direct | Mar 6, 2025 (2d) |
| Nov 6, 2024 | AMPH | ↓ Sell | 7,426 | $52.05 | $387K | Direct | Nov 8, 2024 (2d) |
| Jul 31, 2024 | AMPH | ↓ Sell | 10,282 | $44.23 | $455K | Direct | Aug 2, 2024 (2d) |
| Jun 27, 2024 | AMPH | ↓ Sell | 3,596 | $40.93 | $147K | Direct | Jun 28, 2024 (1d) |
| Mar 6, 2024 | AMPH | ↓ Sell | 18,136 | $46.48 | $843K | Direct | Mar 8, 2024 (2d) |
| Nov 14, 2023 | AMPH | ↓ Sell | 59,250 | $55.67 | $3.3M | Direct | Nov 16, 2023 (2d) |
| Sep 6, 2023 | AMPH | ↓ Sell | 60,743 | $51.75 | $3.1M | Direct | Sep 8, 2023 (2d) |
| Jun 15, 2023 | AMPH | ↓ Sell | 36,868 | $50.85 | $1.9M | Direct | Jun 20, 2023 (5d) |
| Jun 2, 2023 | AMPH | ↓ Sell | 11,000 | $46.35 | $510K | Direct | Jun 5, 2023 (3d) |
| May 18, 2023 | AMPH | ↓ Sell | 10,500 | $44.35 | $466K | Direct | May 22, 2023 (4d) |
| Apr 17, 2023 | AMPH | ↓ Sell | 5,632 | $42.35 | $239K | Direct | Apr 18, 2023 (1d) |
| Apr 13, 2023 | AMPH | ↓ Sell | 4,868 | $42.35 | $206K | Direct | Apr 14, 2023 (1d) |
| Apr 10, 2023 | AMPH | ↓ Sell | 10,032 | $40.35 | $405K | Direct | Apr 12, 2023 (2d) |
| Mar 15, 2023 | AMPH | ↓ Sell | 12,776 | $36.43 | $465K | Direct | Mar 17, 2023 (2d) |
| Mar 1, 2023 | AMPH | ↓ Sell | 10,974 | $36.33 | $399K | Direct | Mar 3, 2023 (2d) |
| Aug 9, 2022 | AMPH | ↓ Sell | 10,000 | $38.35 | $384K | Direct | Aug 10, 2022 (1d) |
| Jun 30, 2022 | AMPH | ↓ Sell | 18,386 | $34.95 | $643K | Direct | Jul 1, 2022 (1d) |
| Jun 17, 2022 | AMPH | ↓ Sell | 5,512 | $32.05 | $177K | Direct | Jun 22, 2022 (5d) |
| Mar 16, 2022 | AMPH | ↓ Sell | 50,777 | $33.96 | $1.7M | Direct | Mar 18, 2022 (2d) |
| Mar 15, 2022 | AMPH | ↓ Sell | 7,900 | $34.46 | $272K | Direct | Mar 17, 2022 (2d) |
| Mar 7, 2022 | AMPH | ↓ Sell | 13,026 | $29.35 | $382K | Direct | Mar 9, 2022 (2d) |
| Feb 25, 2022 | AMPH | ↓ Sell | 23,000 | $28.47 | $655K | Direct | Mar 1, 2022 (4d) |
| Feb 8, 2022 | AMPH | ↓ Sell | 10,000 | $26.95 | $270K | Direct | Feb 9, 2022 (1d) |
| Jan 10, 2022 | AMPH | ↓ Sell | 47,776 | $24.75 | $1.2M | Direct | Jan 11, 2022 (1d) |
| Dec 30, 2021 | AMPH | ↓ Sell | 10,000 | $23.40 | $234K | Direct | Jan 4, 2022 (5d) |
| Dec 21, 2021 | AMPH | ↓ Sell | 8,256 | $22.40 | $185K | Direct | Dec 22, 2021 (1d) |
| Dec 16, 2021 | AMPH | ↓ Sell | 1,744 | $22.40 | $39K | Direct | Dec 17, 2021 (1d) |
| Nov 11, 2021 | AMPH | ↓ Sell | 10,000 | $21.33 | $213K | Direct | Nov 12, 2021 (1d) |
| Aug 16, 2021 | AMPH | ↓ Sell | 6,589 | $19.35 | $128K | Direct | Aug 17, 2021 (1d) |
| Jul 7, 2021 | AMPH | ↓ Sell | 10,000 | $20.37 | $204K | Direct | Jul 8, 2021 (1d) |
| Mar 15, 2021 | AMPH | ↓ Sell | 4,244 | $19.03 | $81K | Direct | Mar 17, 2021 (2d) |
| Jan 19, 2021 | AMPH | ↓ Sell | 6,495 | $18.67 | $121K | Direct | Jan 20, 2021 (1d) |
| Aug 14, 2020 | AMPH | ↓ Sell | 5,512 | $20.36 | $112K | Direct | Aug 18, 2020 (4d) |
| Jul 6, 2020 | AMPH | ↓ Sell | 13,656 | $22.00 | $300K | Direct | Jul 8, 2020 (2d) |
| Mar 13, 2020 | AMPH | ↓ Sell | 4,701 | $13.94 | $66K | Direct | Mar 17, 2020 (4d) |
| Jan 21, 2020 | AMPH | ↓ Sell | 3,990 | $20.07 | $80K | Direct | Jan 23, 2020 (2d) |
| Sep 16, 2019 | AMPH | ↓ Sell | 9,800 | $21.76 | $213K | Direct | Sep 18, 2019 (2d) |
| Aug 15, 2019 | AMPH | ↓ Sell | 4,942 | $21.00 | $104K | Direct | Aug 16, 2019 (1d) |
| Mar 4, 2019 | AMPH | ↓ Sell | 1,500 | $25.36 | $38K | Direct | Mar 6, 2019 (2d) |
| Feb 15, 2019 | AMPH | ↓ Sell | 10,016 | $24.37 | $244K | Direct | Feb 15, 2019 (0d) |
| Jan 2, 2019 | AMPH | ↓ Sell | 3,245 | $19.52 | $63K | Direct | Jan 4, 2019 (2d) |
| Dec 3, 2018 | AMPH | ↓ Sell | 10,000 | $22.40 | $224K | Direct | Dec 4, 2018 (1d) |
| Nov 12, 2018 | AMPH | ↓ Sell | 38,484 | $20.74 | $798K | Direct | Nov 13, 2018 (1d) |
| Aug 16, 2018 | AMPH | ↓ Sell | 2,407 | $17.59 | $42K | Direct | Aug 17, 2018 (1d) |
| Jul 9, 2018 | AMPH | ↓ Sell | 3,250 | $16.46 | $53K | Direct | Jul 11, 2018 (2d) |
| Mar 13, 2018 | AMPH | ↓ Sell | 19,801 | $20.10 | $398K | Direct | Mar 15, 2018 (2d) |
| Dec 1, 2017 | AMPH | ↓ Sell | 6,226 | $19.67 | $122K | Direct | Dec 5, 2017 (4d) |
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 William J Peters's insider trades
William J Peters is CFO, EVP & Treasurer at Amphastar Pharmaceuticals (AMPH). Since Dec 13, 2005, William has reported no open-market purchases and 69 sales worth $29.0M on SEC Form 4. In the last 12 months: 3 sales ($1.1M).
Their filings also include option exercises (49 filings), shares withheld for taxes (32 filings), grants and awards (22 filings). 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.