Peters William J (CIK 0001263136)

Latest company ownership

Shares held
124,985
Last filed at
May 20, 2025
Confidence Score
49.1
2025Q4
Confidence Score History
2015Q2 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
May 19, 2025 May 20, 2025 Amphastar Pharmaceuticals, Inc. CFO Sell 45.0 -273 -0.22% ✗ $6.8K
Mar 15, 2025 Mar 18, 2025 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -4,972 -3.82% ✗ $135.6K
Mar 6, 2025 Mar 10, 2025 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -2,141 -2.24% ✗ $60.6K
Mar 4, 2025 Mar 6, 2025 Amphastar Pharmaceuticals, Inc. CFO Sell 32.5 -5,970 -5.88% ✓ $164.5K
Nov 6, 2024 Nov 8, 2024 Amphastar Pharmaceuticals, Inc. CFO Sell 30.0 -7,426 -7.31% ✓ $386.5K
Jul 31, 2024 Aug 2, 2024 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -10,282 -9.85% ✓ $454.8K
Jun 27, 2024 Jun 28, 2024 Amphastar Pharmaceuticals, Inc. CFO Sell 37.5 -3,596 -3.68% ✓ $147.2K
May 19, 2024 May 21, 2024 Amphastar Pharmaceuticals, Inc. CFO Sell 43.8 -387 -0.40% ✗ $16.8K
Mar 15, 2024 Mar 19, 2024 Amphastar Pharmaceuticals, Inc. CFO Sell 20.0 -11,645 -10.65% ✗ $501.3K
Mar 6, 2024 Mar 8, 2024 Amphastar Pharmaceuticals, Inc. CFO Sell 17.5 -20,326 -15.68% ✓ $944.3K
Nov 14, 2023 Nov 16, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 5.0 -59,250 -36.89% ✓ $3.3M
Sep 6, 2023 Sep 8, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 5.0 -60,743 -37.47% ✓ $3.1M
Jun 15, 2023 Jun 20, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 5.0 -36,868 -25.88% ✓ $1.9M
Jun 2, 2023 Jun 5, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -11,000 -9.43% ✓ $509.9K
May 18, 2023 May 22, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -10,878 -9.41% ✓ $482.4K
Apr 17, 2023 Apr 18, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 32.5 -5,632 -5.08% ✓ $238.5K
Apr 13, 2023 Apr 14, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 37.5 -4,868 -4.42% ✓ $206.2K
Apr 10, 2023 Apr 12, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -10,032 -8.71% ✓ $404.8K
Mar 16, 2023 Mar 20, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 20.0 -9,157 -8.01% ✗ $338.9K
Mar 15, 2023 Mar 17, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -16,922 -12.90% ✓ $618.2K
Mar 1, 2023 Mar 3, 2023 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -10,974 -9.83% ✓ $398.7K
Aug 9, 2022 Aug 10, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -10,000 -9.05% ✓ $383.5K
Jun 30, 2022 Jul 1, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 17.5 -18,386 -15.47% ✓ $642.6K
Jun 17, 2022 Jun 22, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 32.5 -5,512 -5.20% ✓ $176.7K
May 19, 2022 May 20, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 43.8 -378 -0.36% ✗ $12.7K
Mar 16, 2022 Mar 18, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 17.5 -59,934 -36.34% ✗ $2M
Mar 15, 2022 Mar 17, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 92.5 +8,102 7.64% ✓ $480.3K
Mar 7, 2022 Mar 9, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -13,026 -10.94% ✓ $382.3K
Feb 25, 2022 Mar 1, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 17.5 -23,000 -17.82% ✓ $654.9K
Feb 8, 2022 Feb 9, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -10,000 -8.62% ✓ $269.5K
Jan 7, 2022 Jan 11, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 20.0 -47,776 -12.65% ✓ $1.2M
Dec 30, 2021 Jan 4, 2022 Amphastar Pharmaceuticals, Inc. CFO Sell 28.8 -10,000 -8.62% ✓ $234K
Dec 21, 2021 Dec 22, 2021 Amphastar Pharmaceuticals, Inc. CFO Sell 32.5 -8,256 -7.22% ✓ $184.9K
Dec 16, 2021 Dec 17, 2021 Amphastar Pharmaceuticals, Inc. CFO Sell 48.8 -1,744 -1.62% ✓ $39.1K
Nov 11, 2021 Nov 12, 2021 Amphastar Pharmaceuticals, Inc. CFO Sell 28.8 -10,000 -8.64% ✓ $213.3K
Aug 16, 2021 Aug 17, 2021 Amphastar Pharmaceuticals, Inc. CFO Sell 32.5 -6,589 -5.87% ✓ $127.5K
Jul 7, 2021 Jul 8, 2021 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -10,000 -8.18% ✗ $203.7K
Mar 16, 2021 Mar 18, 2021 Amphastar Pharmaceuticals, Inc. CFO Sell 95.0 +27,176 33.50% ✗ $118K
Mar 15, 2021 Mar 17, 2021 Amphastar Pharmaceuticals, Inc. CFO Sell 28.8 -8,422 -8.98% ✓ $160.8K
Jan 19, 2021 Jan 20, 2021 Amphastar Pharmaceuticals, Inc. CFO Sell 32.5 -6,495 -6.76% ✓ $121.2K
Aug 14, 2020 Aug 18, 2020 Amphastar Pharmaceuticals, Inc. CFO Sell 32.5 -5,512 -5.45% ✓ $112.2K
Jul 6, 2020 Jul 8, 2020 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -13,656 -11.89% ✓ $300.4K
Mar 16, 2020 Mar 18, 2020 Amphastar Pharmaceuticals, Inc. CFO Sell 95.0 +33,942 48.42% ✗ $87.8K
Mar 13, 2020 Mar 17, 2020 Amphastar Pharmaceuticals, Inc. CFO Sell 25.0 -8,879 -11.24% ✓ $124.8K
Jan 21, 2020 Jan 23, 2020 Amphastar Pharmaceuticals, Inc. CFO Sell 37.5 -3,990 -4.81% ✓ $80.1K
Sep 16, 2019 Sep 18, 2019 Amphastar Pharmaceuticals, Inc. CFO Sell 25.0 -9,800 -10.62% ✓ $213.3K
Aug 15, 2019 Aug 16, 2019 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -4,942 -5.65% ✗ $103.8K
Mar 26, 2019 Mar 27, 2019 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -2,553 -2.87% ✗ $52.4K
Mar 15, 2019 Mar 19, 2019 Amphastar Pharmaceuticals, Inc. CFO Sell 97.5 +13,342 17.66% ✗ $255.1K
Mar 4, 2019 Mar 6, 2019 Amphastar Pharmaceuticals, Inc. CFO Sell 48.8 -1,500 -1.95% ✓ $38K
Feb 15, 2019 Feb 15, 2019 Amphastar Pharmaceuticals, Inc. CFO Sell 25.0 -10,016 -11.71% ✓ $244.1K
Jan 2, 2019 Jan 4, 2019 Amphastar Pharmaceuticals, Inc. CFO Sell 37.5 -3,245 -4.12% ✓ $63.4K
Dec 3, 2018 Dec 4, 2018 Amphastar Pharmaceuticals, Inc. CFO Sell 25.0 -10,000 -11.26% ✓ $224K
Nov 8, 2018 Nov 13, 2018 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -38,484 -10.43% ✓ $798K
Aug 16, 2018 Aug 17, 2018 Amphastar Pharmaceuticals, Inc. CFO Sell 45.0 -2,407 -2.70% ✓ $42.3K
Jul 9, 2018 Jul 11, 2018 Amphastar Pharmaceuticals, Inc. CFO Sell 37.5 -3,250 -3.51% ✓ $53.5K
Apr 21, 2018 Apr 23, 2018 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -1,273 -1.37% ✗ $24.6K
Mar 26, 2018 Mar 28, 2018 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -1,677 -1.78% ✗ $31.2K
Mar 16, 2018 Mar 20, 2018 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -6,349 -6.31% ✗ $126.4K
Mar 13, 2018 Mar 15, 2018 Amphastar Pharmaceuticals, Inc. CFO Sell 12.5 -19,801 -20.18% ✓ $398K
Dec 1, 2017 Dec 5, 2017 Amphastar Pharmaceuticals, Inc. CFO Sell 32.5 -6,226 -7.36% ✓ $122.5K
Oct 13, 2017 Oct 13, 2017 Amphastar Pharmaceuticals, Inc. CFO Sell 37.5 -3,026 -3.50% ✓ $56.2K
May 30, 2017 Jun 1, 2017 Amphastar Pharmaceuticals, Inc. CFO Sell 22.5 -4,297 -4.73% ✗ $72.7K
Apr 21, 2017 Apr 25, 2017 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -1,384 -1.50% ✗ $20.4K
Mar 26, 2017 Mar 28, 2017 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -1,823 -1.94% ✗ $25.1K
Mar 16, 2017 Mar 20, 2017 Amphastar Pharmaceuticals, Inc. CFO Sell 95.0 +30,003 46.86% ✗ $50.9K
Aug 12, 2016 Aug 15, 2016 Amphastar Pharmaceuticals, Inc. CFO Sell 48.8 -1,027 -1.59% ✓ $18.7K
Jul 18, 2016 Jul 19, 2016 Amphastar Pharmaceuticals, Inc. CFO Sell 41.3 -2,297 -3.43% ✓ $40.8K
Jun 2, 2016 Jun 3, 2016 Amphastar Pharmaceuticals, Inc. CFO Sell 41.3 -2,297 -3.32% ✓ $36.8K
Apr 21, 2016 Apr 22, 2016 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -1,383 -1.96% ✗ $18K
Mar 26, 2016 Mar 29, 2016 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -1,823 -2.52% ✗ $21.8K
Apr 21, 2015 Apr 23, 2015 Amphastar Pharmaceuticals, Inc. CFO Sell 26.3 -1,384 -4.06% ✗ $21.1K