Luo Mary Z. (CIK 0001611156)

Latest company ownership

Shares held
936,955
Last filed at
Feb 3, 2016
Confidence Score
49.6
2025Q4
Confidence Score History
2015Q1 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 14, 2025 Mar 18, 2025 Amphastar Pharmaceuticals, Inc. COO Sell 35.0 -426,195 -10.01% ✗ $11.4M
Mar 6, 2025 Mar 10, 2025 Amphastar Pharmaceuticals, Inc. COO Sell 37.5 -12,714 -0.35% ✗ $360.1K
Mar 4, 2025 Mar 6, 2025 Amphastar Pharmaceuticals, Inc. COO Sell 40.0 -8,179 -0.23% ✗ $225.9K
Mar 15, 2024 Mar 19, 2024 Amphastar Pharmaceuticals, Inc. COO Sell 35.0 -634,199 -14.76% ✗ $27.3M
Mar 6, 2024 Mar 8, 2024 Amphastar Pharmaceuticals, Inc. COO Sell 37.5 -10,021 -0.31% ✗ $464.1K
Jan 10, 2024 Jan 11, 2024 Amphastar Pharmaceuticals, Inc. COO Sell 38.8 -131,386 -1.29% ✓ $7.2M
Jan 8, 2024 Jan 10, 2024 Amphastar Pharmaceuticals, Inc. COO Sell 33.8 -219,800 -2.12% ✓ $12.8M
Mar 16, 2023 Mar 20, 2023 Amphastar Pharmaceuticals, Inc. COO Sell 17.5 -172,789 -3.34% ✗ $2.2M
Mar 15, 2023 Mar 17, 2023 Amphastar Pharmaceuticals, Inc. COO Sell 37.5 -11,237 -0.30% ✗ $414K
May 20, 2022 May 23, 2022 Amphastar Pharmaceuticals, Inc. CEO Sell 47.5 -10,650 -0.10% ✓ $364.4K
May 18, 2022 May 20, 2022 Amphastar Pharmaceuticals, Inc. CEO Sell 40.0 -108,776 -1.03% ✓ $3.7M
May 16, 2022 May 18, 2022 Amphastar Pharmaceuticals, Inc. CEO Sell 40.0 -118,445 -1.11% ✓ $4.2M
Mar 16, 2022 Mar 18, 2022 Amphastar Pharmaceuticals, Inc. CEO Sell 17.5 -58,487 -1.50% ✗ $2M
Mar 15, 2022 Mar 17, 2022 Amphastar Pharmaceuticals, Inc. CEO Sell 85.0 +89,781 2.36% ✗ $679K
Mar 16, 2021 Mar 18, 2021 Amphastar Pharmaceuticals, Inc. COO Sell 90.0 +149,970 4.10% ✗ $629.4K
Mar 15, 2021 Mar 17, 2021 Amphastar Pharmaceuticals, Inc. COO Sell 20.0 -37,680 -1.02% ✗ $721.6K
Feb 16, 2021 Feb 18, 2021 Amphastar Pharmaceuticals, Inc. COO Sell 46.3 -30,467 -0.33% ✓ $566.3K
Feb 10, 2021 Feb 12, 2021 Amphastar Pharmaceuticals, Inc. COO Sell 45.0 -48,847 -0.53% ✓ $924.8K
Feb 5, 2021 Feb 9, 2021 Amphastar Pharmaceuticals, Inc. COO Sell 46.3 -40,886 -0.44% ✓ $773.5K
Feb 3, 2021 Feb 5, 2021 Amphastar Pharmaceuticals, Inc. COO Sell 46.3 -41,869 -0.45% ✓ $782.3K
Feb 1, 2021 Feb 3, 2021 Amphastar Pharmaceuticals, Inc. COO Sell 46.3 -37,931 -0.41% ✓ $698.9K
Mar 16, 2020 Mar 18, 2020 Amphastar Pharmaceuticals, Inc. COO Sell 92.5 +187,383 5.34% ✗ $438.4K
Mar 15, 2020 Mar 17, 2020 Amphastar Pharmaceuticals, Inc. COO Sell 20.0 -36,772 -1.04% ✗ $521.8K
Sep 11, 2019 Sep 12, 2019 Amphastar Pharmaceuticals, Inc. COO Sell 16.3 -300,000 -3.17% ✗ $6.2M
Mar 15, 2019 Mar 18, 2019 Amphastar Pharmaceuticals, Inc. COO Sell 15.0 -632,205 -15.13% ✗ $15.6M
Dec 14, 2018 Dec 17, 2018 Amphastar Pharmaceuticals, Inc. COO Sell 37.5 -43,577 -0.40% ✗ $892.3K
Dec 11, 2018 Dec 13, 2018 Amphastar Pharmaceuticals, Inc. COO Sell 17.5 -133,915 -1.40% ✗ $2.9M
Jul 2, 2018 Jul 3, 2018 Amphastar Pharmaceuticals, Inc. COO Sell 16.3 -450,484 -11.45% ✗ $6.9M
May 15, 2018 May 17, 2018 Amphastar Pharmaceuticals, Inc. COO Buy 67.5 +40,000 0.36% ✗ $642.8K
Mar 26, 2018 Mar 28, 2018 Amphastar Pharmaceuticals, Inc. COO Sell 30.0 -29,572 -0.87% ✗ $550.3K
Mar 16, 2018 Mar 20, 2018 Amphastar Pharmaceuticals, Inc. COO Sell 17.5 -67,207 -1.93% ✗ $1.3M
Dec 15, 2017 Dec 19, 2017 Amphastar Pharmaceuticals, Inc. COO Sell 15.0 -830,089 -19.89% ✗ $16M
Sep 13, 2017 Sep 15, 2017 Amphastar Pharmaceuticals, Inc. COO Sell 17.5 -274,386 -9.37% ✗ $4.4M
Mar 26, 2017 Mar 28, 2017 Amphastar Pharmaceuticals, Inc. COO Sell 20.0 -65,254 -3.21% ✗ $916.6K
Mar 16, 2017 Mar 20, 2017 Amphastar Pharmaceuticals, Inc. COO Sell 97.5 +190,910 10.37% ✗ $454.6K
Sep 20, 2016 Sep 22, 2016 Amphastar Pharmaceuticals, Inc. COO Sell 22.5 -444,199 -7.82% ✓ $9.3M
Mar 26, 2016 Mar 29, 2016 Amphastar Pharmaceuticals, Inc. COO Sell 20.0 -56,912 -3.00% ✗ $680.7K
Jun 10, 2015 Feb 3, 2016 Amphastar Pharmaceuticals, Inc. COO Sell 32.5 -160,495 -3.23% ✓ $2.6M
Dec 9, 2015 Dec 11, 2015 Amphastar Pharmaceuticals, Inc. COO Sell 45.0 -63,300 -0.75% ✓ $901.8K
Dec 4, 2015 Dec 8, 2015 Amphastar Pharmaceuticals, Inc. COO Sell 42.5 -68,117 -0.80% ✓ $1M
Dec 1, 2015 Dec 3, 2015 Amphastar Pharmaceuticals, Inc. 10% Owner Sell 46.3 -38,583 -0.45% ✓ $596.2K
Jun 15, 2015 Jun 17, 2015 Amphastar Pharmaceuticals, Inc. COO Sell 45.0 -50,061 -0.53% ✓ $815.7K
Jun 5, 2015 Jun 12, 2015 Amphastar Pharmaceuticals, Inc. COO Sell 40.0 -199,219 -1.38% ✓ $3.2M
Mar 27, 2015 Jun 9, 2015 Amphastar Pharmaceuticals, Inc. COO Sell 32.5 -223,276 -3.40% ✓ $3.6M