Zhou Rong

CIK 00016453261 companyRANCHO CUCAMONGA, CA

SEC Profile

Transactions

Companies

Filings

CIK

0001645326

Recent Transactions

50 trades

Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2025-12-17$26.20/sh−9,787→ 138,043 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2025-12-17−9,787→ 0 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2025-12-17$11.33/sh+9,787→ 147,830 total
Tax Payment
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2025-03-17$27.69/sh−1,967→ 137,497 total
Tax Payment
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2025-03-15$26.66/sh−1,222→ 139,464 total
Award
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2025-03-10+24,692→ 140,686 total
Award
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2025-03-10+52,437→ 52,437 total
Tax Payment
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2025-03-06$28.32/sh−1,354→ 115,994 total
Tax Payment
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2025-03-04$27.62/sh−1,121→ 117,348 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2024-12-13−8,000→ 9,787 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2024-12-13$45.23/sh−8,000→ 118,469 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2024-12-13$11.33/sh+8,000→ 126,469 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2024-12-12−7,000→ 17,787 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2024-12-12$44.42/sh−7,000→ 118,469 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2024-12-12$11.33/sh+7,000→ 125,469 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2024-11-12−6,893→ 0 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2024-11-12$48.88/sh−6,893→ 118,388 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2024-11-12$14.95/sh+6,893→ 125,281 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2024-09-13$14.95/sh+3,000→ 121,388 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2024-09-13$48.26/sh−3,000→ 118,388 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2024-09-13−3,000→ 6,893 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2024-08-26$48.35/sh−4,000→ 118,388 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2024-08-26$14.95/sh+4,000→ 122,388 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2024-08-26−4,000→ 9,893 total
Tax Payment
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2024-03-17$43.05/sh−1,961→ 118,016 total
Tax Payment
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2024-03-16$43.05/sh−2,355→ 119,977 total
Tax Payment
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2024-03-15$43.05/sh−1,219→ 122,332 total
Tax Payment
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2024-03-06$46.31/sh−1,390→ 123,551 total
Award
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2024-03-04+26,378→ 26,378 total
Award
Amphastar Pharmaceuticals, Inc.$AMPH
Common Srock
2024-03-04+12,521→ 124,941 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-12-04$59.58/sh−3,514→ 112,420 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-12-04$16.19/sh+3,514→ 115,934 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2023-12-04−3,514→ 0 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-12-01$58.58/sh−4,316→ 112,420 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2023-12-01−4,316→ 0 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-12-01$14.40/sh+4,316→ 116,736 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2023-06-20−9,651→ 24,787 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-06-20$11.33/sh+9,651→ 112,341 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2023-06-15−13,575→ 4,316 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-06-15$14.95/sh+4,631→ 101,519 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-06-15$14.40/sh+13,575→ 101,888 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-06-15$51.79/sh−5,000→ 96,888 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2023-06-15−4,631→ 13,893 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-06-15$16.19/sh+1,171→ 102,690 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2023-06-15−1,171→ 3,514 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Employee Stock Option (right to buy)
2023-06-13−5,000→ 17,891 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-06-13$48.24/sh−5,000→ 88,313 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-06-13$14.40/sh+5,000→ 93,313 total
Sale
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-05-18$44.20/sh−10,000→ 87,598 total
Exercise/Conversion
Amphastar Pharmaceuticals, Inc.$AMPH
Common Stock
2023-05-18$14.40/sh+10,000→ 97,598 total

Companies

Amphastar Pharmaceuticals, Inc.
SENIOR EVP, PRODUCTION CENTER
$AMPH

Recent Filings

Address

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

RANCHO CUCAMONGA, CA, 91730

View on SEC.gov