Financials & Filings Third Quarter 2017 Financial Results Show all 2020 Q4 Amphastar Pharmaceuticals Reports Financial Results for the Three Months and Full-Year Ended December 31, 2020 Amphastar Fourth Quarter Earnings Call 10-K Q3 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended September 30, 2020 Amphastar Third Quarter Earnings Call Form 10-Q Q2 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended June 30, 2020 Amphastar Second Quarter Earnings Call Form 10-Q Q1 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended March 31, 2020 Amphastar First Quarter Earnings Call Form 10-Q 2019 Q4 Amphastar Pharmaceuticals Reports Financial Results for the Three Months and Full Year Ended December 31, 2019 Amphastar Fourth Quarter Earnings Call Form 10-K Q3 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended September 30, 2019 Amphastar Third Quarter Earnings Call Form 10-Q Q2 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended June 30, 2019 Amphastar Second Quarter Earnings Call Form 10-Q Q1 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended March 31, 2019 Amphastar First Quarter Earnings Call Form 10-Q 2018 Q4 Amphastar Pharmaceuticals Reports Financial Results for the Three Months and Full Year Ended December 31, 2018 Amphastar Fourth Quarter Earnings Call Form 10-K Q3 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended September 30, 2018 Amphastar Third Quarter Earnings Call Form 10-Q Q2 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended June 30, 2018 Amphastar Second Quarter Earnings Call Form 10-Q Q1 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended March 31, 2018 Amphastar First Quarter Earnings Call Form 10-Q Proxy Statements Filing date View Apr 14,2021 View HTML 0001297184-21-000017.pdf 0001297184-21-000017.rtf Apr 14,2021 View HTML 0001297184-21-000015.pdf 0001297184-21-000015.xls 0001297184-21-000015.rtf Form 10-K Filing date View Mar 15,2021 View HTML 0001297184-21-000008.pdf 0001297184-21-000008.xls 0001297184-21-000008.rtf EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA Mar 16,2020 View HTML 0001297184-20-000007.pdf 0001297184-20-000007.xls 0001297184-20-000007.rtf EX-101.INS - EX-101.INS Form 10-Q Filing date View Nov 06,2020 View HTML 0001297184-20-000056.pdf 0001297184-20-000056.xls 0001297184-20-000056.rtf EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA Aug 10,2020 View HTML 0001297184-20-000047.pdf 0001297184-20-000047.xls 0001297184-20-000047.rtf EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA