Zhang Jack Y. Insider Trades

Insider Trading History

Track insider trading activity for Zhang Jack Y.. See latest buy and sell transactions across all companies.

Holdings

Company
Holding Value
Last Transaction
Sale/Purchase
Amount
Price
Current Price

Insider Trades History

Company
Holding Value
Last Transaction
Sale/Purchase
Amount
Price
Current Price
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $55.9M 2,990,052 shares
Last Trade
Mar 15, 2026 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$231k 12,692 shares
$18.18
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $56.1M 2,999,836 shares
Last Trade
Mar 10, 2026 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$363k 19,180 shares
$18.91
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $56.4M 3,014,621 shares
Last Trade
Mar 09, 2026 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$14.9M 774,776 shares
$19.21
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $53M 2,834,117 shares
Last Trade
Mar 06, 2026 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$210k 10,850 shares
$19.34
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $53.1M 2,841,890 shares
Last Trade
Mar 04, 2026 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$164k 8,201 shares
$19.96
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $53.3M 2,847,659 shares
Last Trade
Jun 13, 2025 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$5.16M 200,000 shares
$25.82
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $3.83M 205,003 shares
Last Trade
Jun 13, 2025 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$5.16M 200,000 shares
$25.82
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $49.5M 2,647,659 shares
Last Trade
Mar 17, 2025 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$647k 23,373 shares
$27.69
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $49.8M 2,663,809 shares
Last Trade
Mar 15, 2025 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$370k 13,880 shares
$26.66
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $0 0 shares
Last Trade
Mar 14, 2025 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$5.63M 211,213 shares
$26.66
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $54.2M 2,899,859 shares
Last Trade
Mar 14, 2025 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$13.4M 501,690 shares
$26.66
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $50M 2,673,574 shares
Last Trade
Mar 14, 2025 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$10.4M 388,942 shares
$26.66
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $48.8M 2,609,382 shares
Last Trade
Mar 10, 2025 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$9.97M 350,873 shares
$28.41
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $46.6M 2,493,156 shares
Last Trade
Mar 06, 2025 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$360k 12,714 shares
$28.32
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $46.9M 2,508,554 shares
Last Trade
Nov 11, 2024 Sale (Gift)Shares transferred as a gift rather than bought or sold for cash.
$6.07M 125,000 shares
$48.57
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $5.43M 290,477 shares
Last Trade
Sep 13, 2024 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$4.81M 100,000 shares
$48.09
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $49.2M 2,633,554 shares
Last Trade
Sep 13, 2024 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$4.81M 100,000 shares
$48.09
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $7.3M 390,477 shares
Last Trade
Jun 10, 2024 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$4.16M 100,000 shares
$41.64
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & CHIEF SCIENTIFIC OFFICER
Holding Value $47.4M 2,533,554 shares
Last Trade
Jun 10, 2024 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$4.16M 100,000 shares
$41.64
$18.70
Amphastar Pharmaceuticals
Amphastar Pharmaceuticals AMPH
10% owner, CEO & Chief Scientific Officer
Holding Value $45.5M 2,433,554 shares
Last Trade
Mar 17, 2024 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$982k 22,820 shares
$43.05
$18.70

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