Amphastar Pharmaceuticals, Inc. Insider Trading for May 2020

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General | Insiders | Insider Transactions | Monthly Overview | Weekly Overview

Overview of insider trading in Amphastar Pharmaceuticals, Inc. for May 2020.

Date	Ticker	Company	Owner	Relationship	Transaction	Code	Cost ($)	Shares	Transaction Value ($)	Total Shares	% Holdings
May 28 2020	AMPH	Amphastar Pharmace ...	Koo Richard	Director	Option Exercise	M	15.11	47,782	721,986	0
May 28 2020	AMPH	Amphastar Pharmace ...	Koo Richard	Director	Sell	S	18.18	47,782	868,892	247,419	295.2 K to 247.4 K (-16.19 %)
May 28 2020	AMPH	Amphastar Pharmace ...	Koo Richard	Director	Buy	M	15.11	47,782	721,986	295,201	247.4 K to 295.2 K (+19.31 %)
May 27 2020	AMPH	Amphastar Pharmace ...	Lee Howard	Director	Option Exercise	M	15.11	10,000	151,100	0
May 27 2020	AMPH	Amphastar Pharmace ...	Lee Howard	Director	Option Exercise	M	15.11	10,000	151,100	10,000
May 27 2020	AMPH	Amphastar Pharmace ...	Lee Howard	Director	Sell	S	18.60	10,000	185,989	128,081	138.1 K to 128.1 K (-7.24 %)
May 27 2020	AMPH	Amphastar Pharmace ...	Lee Howard	Director	Buy	M	15.11	10,000	151,100	138,081	128.1 K to 138.1 K (+7.81 %)
May 27 2020	AMPH	Amphastar Pharmace ...	Lee Howard	Director	Sell	S	18.36	10,000	183,639	128,081	138.1 K to 128.1 K (-7.24 %)
May 27 2020	AMPH	Amphastar Pharmace ...	Lee Howard	Director	Buy	M	15.11	10,000	151,100	138,081	128.1 K to 138.1 K (+7.81 %)
May 18 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Option Exercise	M	15.11	22,950	346,775	0
May 18 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Option Exercise	M	15.11	14,832	224,112	22,950
May 18 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Sell	S	18.03	22,950	413,681	35,336	58.3 K to 35.3 K (-39.37 %)
May 18 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Buy	M	15.11	22,950	346,775	58,286	35.3 K to 58.3 K (+64.95 %)
May 18 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Sell	S	18.00	14,832	266,976	35,336	50.2 K to 35.3 K (-29.56 %)
May 18 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Buy	M	15.11	14,832	224,112	50,168	35.3 K to 50.2 K (+41.97 %)
May 18 2020	AMPH	Amphastar Pharmace ...	Petersen Floyd F.	Director	Option Exercise	M	15.11	42,682	644,925	0
May 18 2020	AMPH	Amphastar Pharmace ...	Petersen Floyd F.	Director	Option Exercise	M	15.11	5,000	75,550	42,682
May 18 2020	AMPH	Amphastar Pharmace ...	Petersen Floyd F.	Director	Sell	S	18.25	42,682	778,968	71,642	114.3 K to 71.6 K (-37.33 %)
May 18 2020	AMPH	Amphastar Pharmace ...	Petersen Floyd F.	Director	Buy	M	15.11	42,682	644,925	114,324	71.6 K to 114.3 K (+59.58 %)
May 18 2020	AMPH	Amphastar Pharmace ...	Petersen Floyd F.	Director	Sell	S	17.78	5,000	88,876	71,642	76.6 K to 71.6 K (-6.52 %)
May 18 2020	AMPH	Amphastar Pharmace ...	Petersen Floyd F.	Director	Buy	M	15.11	5,000	75,550	76,642	71.6 K to 76.6 K (+6.98 %)
May 14 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Option Exercise	M	15.11	10,000	151,100	37,782
May 14 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Sell	S	19.00	10,000	190,000	35,336	45.3 K to 35.3 K (-22.06 %)
May 14 2020	AMPH	Amphastar Pharmace ...	ZASLOFF MICHAEL A	Director	Buy	M	15.11	10,000	151,100	45,336	35.3 K to 45.3 K (+28.30 %)
May 14 2020	AMPH	Amphastar Pharmace ...	PRINS RICHARD K	Director	Option Exercise	M	15.11	30,282	457,561	0
May 14 2020	AMPH	Amphastar Pharmace ...	PRINS RICHARD K	Director	Sell	S	19.00	30,282	575,419	39,309	69.6 K to 39.3 K (-43.51 %)
May 14 2020	AMPH	Amphastar Pharmace ...	PRINS RICHARD K	Director	Buy	M	15.11	30,282	457,561	69,591	39.3 K to 69.6 K (+77.04 %)
May 05 2020	AMPH	Amphastar Pharmace ...	Petersen Floyd F.	Director	Sell	S	16.66	500	8,329	71,642	72.1 K to 71.6 K (-0.69 %)