Gerst Diane G. (CIK 0001611283)

Latest company ownership

Shares held
11,402
Last filed at
Jun 4, 2025
Confidence Score
50.0
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)
Jul 18, 2022 Jul 19, 2022 Amphastar Pharmaceuticals, Inc. Director Sell 25.0 -1,520 -10.58% ✓ $56.6K
Jul 11, 2022 Jul 12, 2022 Amphastar Pharmaceuticals, Inc. Director Sell 25.0 -1,521 -10.59% ✓ $55.1K
Jul 5, 2022 Jul 6, 2022 Amphastar Pharmaceuticals, Inc. Director Sell 25.0 -1,813 -12.37% ✓ $63.5K
Jun 30, 2022 Jul 5, 2022 Amphastar Pharmaceuticals, Inc. Director Sell 10.0 -5,146 -28.61% ✓ $180.1K
Dec 19, 2017 Dec 19, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 48.8 -523 -1.70% ✓ $10.2K
Dec 12, 2017 Dec 14, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 50.0 -523 -1.68% ✓ $9.9K
Nov 28, 2017 Nov 30, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 50.0 -523 -1.65% ✓ $9.5K
Nov 21, 2017 Nov 21, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 50.0 -523 -1.62% ✓ $9.8K
Nov 15, 2017 Nov 17, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 50.0 -523 -1.60% ✓ $9.3K
Nov 7, 2017 Nov 9, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 50.0 -523 -1.57% ✓ $9.4K
Oct 24, 2017 Oct 26, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 50.0 -523 -1.55% ✓ $9.6K
Oct 17, 2017 Oct 19, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 50.0 -523 -1.52% ✓ $9.7K
Oct 5, 2017 Oct 6, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 20.0 -8,444 -19.73% ✓ $159.4K
Jun 15, 2017 Jun 16, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 45.0 -146 -0.42% ✗ $2.4K
Apr 14, 2017 Apr 17, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 26.3 -754 -2.14% ✗ $11.2K
Mar 26, 2017 Mar 28, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 27.5 -614 -1.71% ✗ $8.4K
Mar 16, 2017 Mar 20, 2017 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 91.3 +9,667 36.90% ✗ $16.4K
Dec 15, 2016 Dec 16, 2016 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 22.5 -2,940 -10.09% ✗ $60.3K
Aug 19, 2016 Aug 19, 2016 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 7.5 -24,046 -45.34% ✓ $463.6K
Jun 15, 2016 Jun 17, 2016 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 37.5 -146 -0.50% ✗ $2.3K
May 18, 2016 May 19, 2016 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 26.3 -1,427 -4.74% ✗ $19.9K
Apr 18, 2016 Apr 20, 2016 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 7.5 -21,244 -26.10% ✓ $273.8K
Apr 14, 2016 Apr 18, 2016 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 27.5 -741 -2.30% ✗ $9.4K
Mar 26, 2016 Mar 29, 2016 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 27.5 -614 -1.87% ✗ $7.3K
Apr 14, 2015 Jun 17, 2015 Amphastar Pharmaceuticals, Inc. EVP, QA & Regulatory Affairs Sell 83.8 +682 3.50% ✗ $13.1K
Apr 8, 2015 Apr 10, 2015 Amphastar Pharmaceuticals, Inc. Corp. SVP of Quality Assurance Sell 10.0 -10,000 -33.90% ✓ $157.9K