Jack Y. Zhang

AMPH

Jack Y. Zhang serves as CEO & CHIEF SCIENTIFIC OFFICER at Amphastar Pharmaceuticals, Inc. (AMPH). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

14 trades

$54.63M

Net Position

Net Seller

$54.63M

Companies Traded

AMPH

Active Period

Mar 2021 – Mar 2025

14 total trades

Most Recent

Sell AMPH

Mar 14, 2025 · $11.39M

Jack Y. Zhang's Insider Trading at Amphastar Pharmaceuticals, Inc. (AMPH)

Buys

0 · $0.00

Sells

14 · $54.63M

Total Shares Bought

Total Shares Sold

1,548,318

AMPH Price Chart

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Date	Type	Shares	Avg Price	Value
Mar 14, 2025	Sell	426,195	$26.72	$11.39M
Mar 6, 2025	Sell	12,714	$28.32	$360.1K
Mar 4, 2025	Sell	8,179	$27.62	$225.9K
Mar 15, 2024	Sell	634,199	$43.05	$27.30M
Mar 6, 2024	Sell	10,021	$46.31	$464.1K
Mar 16, 2023	Sell	58,059	$37.09	$2.15M
Mar 15, 2023	Sell	11,237	$36.84	$414.0K
May 20, 2022	Sell	10,650	$34.21	$364.4K
May 18, 2022	Sell	108,776	$34.00	$3.70M
May 16, 2022	Sell	118,445	$35.75	$4.23M
Mar 16, 2022	Sell	58,487	$34.20	$2.00M
Mar 15, 2022	Sell	19,545	$34.74	$679.0K
Mar 16, 2021	Sell	34,131	$18.44	$629.4K
Mar 15, 2021	Sell	37,680	$19.15	$721.6K