Insider · CIK 0001611283

Gerst Diane G.

Reports to the SEC for 1 company · RANCHO CUCAMONGA, CA

sec.gov

Transactions

Companies

Filings

CIK

0001611283

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-06-01	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+8,143 sh	—	—	31,899
2026-06-01	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)A Award	Director	AAward	+17.4K sh	—	—	17,365
2025-06-02	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+5,122 sh	—	—	23,756
2025-06-02	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)A Award	Director	AAward	+11.4K sh	—	—	11,402
2024-06-03	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+3,076 sh	—	—	18,634
2024-06-03	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)A Award	Director	AAward	+6,864 sh	—	—	6,864
2023-06-05	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+2,716 sh	—	—	15,558
2023-06-05	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)A Award	Director	AAward	+7,016 sh	—	—	7,016
2022-07-18	AMPHAmphastar Pharmaceuticals, Inc.M Exercise/Conversion	Director	MExercise/Conversion	+1,520 sh	$20.08	+$30.5K	14,362
2022-07-18	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−1,520 sh	$37.23	−$56.6K	12,842
2022-07-18	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)M Exercise/Conversion	Director	MExercise/Conversion	−1,520 sh	—	—	1,336
2022-07-11	AMPHAmphastar Pharmaceuticals, Inc.M Exercise/Conversion	Director	MExercise/Conversion	+1,521 sh	$20.08	+$30.5K	14,363
2022-07-11	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−1,521 sh	$36.26	−$55.1K	12,842
2022-07-11	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)M Exercise/Conversion	Director	MExercise/Conversion	−1,521 sh	—	—	2,856
2022-07-05	AMPHAmphastar Pharmaceuticals, Inc.M Exercise/Conversion	Director	MExercise/Conversion	+1,813 sh	$20.08	+$36.4K	14,655
2022-07-05	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−1,813 sh	$35.00	−$63.5K	12,842
2022-07-05	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)M Exercise/Conversion	Director	MExercise/Conversion	−1,813 sh	—	—	4,377
2022-06-30	AMPHAmphastar Pharmaceuticals, Inc.M Exercise/Conversion	Director	MExercise/Conversion	+3,333 sh	$20.03	+$66.8K	16,175
2022-06-30	AMPHAmphastar Pharmaceuticals, Inc.M Exercise/Conversion	Director	MExercise/Conversion	+1,813 sh	$20.08	+$36.4K	17,988
2022-06-30	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−5,146 sh	$35.00	−$180K	12,842
2022-06-30	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)M Exercise/Conversion	Director	MExercise/Conversion	−3,333 sh	—	—	3,626
2022-06-30	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)M Exercise/Conversion	Director	MExercise/Conversion	−1,813 sh	—	—	6,190
2022-06-10	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+4,163 sh	—	—	12,842
2022-06-10	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)A Award	Director	AAward	+11K sh	—	—	10,984
2021-06-07	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+3,009 sh	—	—	8,679
2021-06-07	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)A Award	Director	AAward	+8,592 sh	—	—	8,592
2020-06-08	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+2,925 sh	—	—	5,670
2020-06-08	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)A Award	Director	AAward	+8,003 sh	—	—	8,003
2019-06-12	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+2,745 sh	—	—	2,745
2019-06-12	AMPHAmphastar Pharmaceuticals, Inc. · Stock Option (right to buy)A Award	Director	AAward	+6,959 sh	—	—	6,959
2017-12-19	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−523 sh	$19.48	−$10.2K	30,164
2017-12-12	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−523 sh	$18.96	−$9,916.917	30,687
2017-11-28	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−523 sh	$18.15	−$9,492.764	31,210
2017-11-21	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−523 sh	$18.81	−$9,839.251	31,733
2017-11-15	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−523 sh	$17.77	−$9,291.566	32,256
2017-11-07	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−523 sh	$17.93	−$9,375.298	32,779
2017-10-24	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−523 sh	$18.29	−$9,567.605	33,302
2017-10-17	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−523 sh	$18.48	−$9,664.883	33,825
2017-10-05	AMPHAmphastar Pharmaceuticals, Inc.M Exercise/Conversion	Director	MExercise/Conversion	+8,444 sh	$11.33	+$95.7K	42,792
2017-10-05	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−8,444 sh	$18.87	−$159K	34,348
2017-10-05	AMPHAmphastar Pharmaceuticals, Inc. · Employee Stock Option (right to buy)M Exercise/Conversion	Director	MExercise/Conversion	−8,444 sh	—	—	25,330
2017-06-15	AMPHAmphastar Pharmaceuticals, Inc.F Tax Payment	Director	FTax Payment	−146 sh	$16.18	−$2,362.28	34,348
2017-04-14	AMPHAmphastar Pharmaceuticals, Inc.F Tax Payment	Director	FTax Payment	−754 sh	$14.80	−$11.2K	34,494
2017-03-26	AMPHAmphastar Pharmaceuticals, Inc.F Tax Payment	Director	FTax Payment	−614 sh	$13.76	−$8,448.64	35,248
2017-03-17	AMPHAmphastar Pharmaceuticals, Inc.F Tax Payment	Director	FTax Payment	−1,194 sh	$13.75	−$16.4K	35,862
2017-03-16	AMPHAmphastar Pharmaceuticals, Inc.A Award	Director	AAward	+10.9K sh	—	—	37,056
2017-03-16	AMPHAmphastar Pharmaceuticals, Inc. · Employee Stock Option (right to buy)A Award	Director	AAward	+27.1K sh	—	—	27,088
2016-12-15	AMPHAmphastar Pharmaceuticals, Inc.S Sale	Director	SSale	−2,940 sh	$20.51	−$60.3K	26,195
2016-08-19	AMPHAmphastar Pharmaceuticals, Inc.M Exercise/Conversion	Director	MExercise/Conversion	+10K sh	$14.23	+$143K	39,031
2016-08-19	AMPHAmphastar Pharmaceuticals, Inc.M Exercise/Conversion	Director	MExercise/Conversion	+14K sh	$10.93	+$153K	53,031

Recent filings

Accepted (ET)
Jun 34
Gerst Diane G.0001611283-26-000003
SEC(opens sec.gov)
Jun 44
Gerst Diane G.0001415889-25-015664
SEC(opens sec.gov)
Jun 54
Gerst Diane G.0001415889-24-015660
SEC(opens sec.gov)
Jun 74
Gerst Diane G.0001104659-23-068999
SEC(opens sec.gov)
Jul 194
Gerst Diane G.0001104659-22-080883
SEC(opens sec.gov)
Jul 124
Gerst Diane G.0001104659-22-079289
SEC(opens sec.gov)
Jul 64
Gerst Diane G.0001104659-22-077826
SEC(opens sec.gov)
Jul 54
Gerst Diane G.0001104659-22-077306
SEC(opens sec.gov)

Companies

Amphastar Pharmaceuticals, Inc.DirectorAMPH

Address

C/O AMPHASTAR PHARMACEUTICALS, INC. 11570 6TH STREET

RANCHO CUCAMONGA, CA, 91730