AMPH insider transactions

EVP CORP ADMIN CENTER Liawatidewi Yakob covered exercise/tax liability with 1,033 shares, decreasing direct ownership by 0.84% to 121,892 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong covered exercise/tax liability with 1,225 shares, decreasing direct ownership by 0.71% to 171,554 units (SEC Form 4)

CFO, EVP & TREASURER Peters William J covered exercise/tax liability with 1,973 shares, decreasing direct ownership by 1% to 175,063 units (SEC Form 4)

CEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. covered exercise/tax liability with 12,692 shares, decreasing direct ownership by 0.33% to 2,990,052 units (SEC Form 4)

CFO, EVP & TREASURER Peters William J covered exercise/tax liability with 3,297 shares and was granted 58,693 shares, increasing direct ownership by 46% to 177,036 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong was granted 39,432 units of Common Srock and covered exercise/tax liability with 2,215 shares, increasing direct ownership by 27% to 172,779 units (SEC Form 4)

SEC Form 4 filed by Amphastar Pharmaceuticals Inc.

SEC Form 4 filed by Amphastar Pharmaceuticals Inc.

SEC Form 4 filed by Amphastar Pharmaceuticals Inc.

SEC Form 4 filed by Amphastar Pharmaceuticals Inc.

SEC Form 4 filed by Amphastar Pharmaceuticals Inc.

EVP CORP ADMIN CENTER Liawatidewi Yakob covered exercise/tax liability with 1,144 shares, decreasing direct ownership by 1% to 89,345 units (SEC Form 4)

CEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. covered exercise/tax liability with 8,201 shares, decreasing direct ownership by 0.20% to 2,841,890 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong covered exercise/tax liability with 1,124 shares, decreasing direct ownership by 0.81% to 136,919 units (SEC Form 4)

EVP CORP ADMIN CENTER Liawatidewi Yakob covered exercise/tax liability with 965 shares, decreasing direct ownership by 1% to 90,489 units (SEC Form 4)

CFO, EVP & TREASURER Peters William J covered exercise/tax liability with 1,744 shares, decreasing direct ownership by 1% to 123,786 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong exercised 9,787 shares at a strike of $11.33 and sold $256,379 worth of shares (9,787 units at $26.20) (SEC Form 4)

Director Petersen Floyd F. sold $107,508 worth of shares (4,163 units at $25.82), decreasing direct ownership by 6% to 71,368 units (SEC Form 4)

Director Prins Richard K exercised 4,179 shares at a strike of $16.69 and sold $113,253 worth of shares (4,179 units at $27.10) (SEC Form 4)

Director Petersen Floyd F. sold $441,837 worth of shares (16,679 units at $26.49) and exercised 16,679 shares at a strike of $16.69 (SEC Form 4)

Director Petersen Floyd F. sold $12,633 worth of shares (500 units at $25.27), decreasing direct ownership by 0.66% to 75,531 units (SEC Form 4)

Director Petersen Floyd F. sold $13,602 worth of shares (500 units at $27.20), decreasing direct ownership by 0.65% to 76,031 units (SEC Form 4)

Director Petersen Floyd F. sold $15,492 worth of shares (500 units at $30.98), decreasing direct ownership by 0.65% to 76,531 units (SEC Form 4)

Director Petersen Floyd F. sold $10,416 worth of shares (500 units at $20.83), decreasing direct ownership by 0.64% to 77,031 units (SEC Form 4)

Director Gaugh David Russell was granted 6,304 shares (SEC Form 4)

SEC Form 3 filed by new insider Gaugh David Russell

Director Petersen Floyd F. sold $11,734 worth of shares (500 units at $23.47), decreasing direct ownership by 0.64% to 77,531 units (SEC Form 4)

CEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. exercised 200,000 shares at a strike of $13.03, increasing direct ownership by 8% to 2,847,659 units (SEC Form 4)

Director Lee Howard was granted 5,122 shares and covered exercise/tax liability with 923 shares, increasing direct ownership by 3% to 151,976 units (SEC Form 4)

Director Deflin Gayle was granted 5,122 shares, increasing direct ownership by 88% to 10,914 units (SEC Form 4)

Director Gerst Diane G. was granted 5,122 shares, increasing direct ownership by 27% to 23,756 units (SEC Form 4)

Director Prins Richard K was granted 5,122 shares, increasing direct ownership by 17% to 35,183 units (SEC Form 4)

Director Petersen Floyd F. sold $12,835 worth of shares (500 units at $25.67) and was granted 5,122 shares, increasing direct ownership by 6% to 78,031 units (SEC Form 4)

Director Zasloff Michael A was granted 5,122 shares, increasing direct ownership by 21% to 29,524 units (SEC Form 4)

CFO, EVP & TREASURER Peters William J covered exercise/tax liability with 273 shares, decreasing direct ownership by 0.22% to 124,985 units (SEC Form 4)

Director Petersen Floyd F. sold $12,041 worth of shares (500 units at $24.08), decreasing direct ownership by 0.68% to 73,409 units (SEC Form 4)

Director Petersen Floyd F. sold $14,190 worth of shares (500 units at $28.38), decreasing direct ownership by 0.67% to 73,909 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong covered exercise/tax liability with 1,222 shares and covered exercise/tax liability with 1,967 units of Common Srock, decreasing direct ownership by 2% to 137,497 units (SEC Form 4)

CEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. exercised 501,690 shares at a strike of $14.69 and covered exercise/tax liability with 426,195 shares, increasing direct ownership by 1% to 2,647,659 units (SEC Form 4)

EVP CORP ADMIN CENTER Liawatidewi Yakob covered exercise/tax liability with 2,762 shares, decreasing direct ownership by 3% to 90,909 units (SEC Form 4)

CFO, EVP & TREASURER Peters William J covered exercise/tax liability with 4,972 shares, decreasing direct ownership by 4% to 125,258 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong was granted 24,692 units of Common Srock, increasing direct ownership by 21% to 140,686 units (SEC Form 4)

EVP CORP ADMIN CENTER Liawatidewi Yakob was granted 20,837 shares, increasing direct ownership by 29% to 93,671 units (SEC Form 4)

CFO, EVP & TREASURER Peters William J was granted 36,747 shares, increasing direct ownership by 39% to 130,230 units (SEC Form 4)

CEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. was granted 165,222 shares, increasing direct ownership by 5% to 2,609,382 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong covered exercise/tax liability with 1,354 shares, decreasing direct ownership by 1% to 115,994 units (SEC Form 4)

CFO, EVP & TREASURER Peters William J covered exercise/tax liability with 2,141 shares, decreasing direct ownership by 2% to 93,483 units (SEC Form 4)

EVP CORP ADMIN CENTER Liawatidewi Yakob covered exercise/tax liability with 1,141 shares, decreasing direct ownership by 2% to 72,834 units (SEC Form 4)

CEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. covered exercise/tax liability with 12,714 shares, decreasing direct ownership by 0.39% to 2,493,156 units (SEC Form 4)

Director Petersen Floyd F. sold $27,986 worth of shares (1,000 units at $27.99), decreasing direct ownership by 1% to 74,409 units (SEC Form 4)

CFO, EVP & TREASURER Peters William J exercised 7,490 shares at a strike of $13.35, sold $116,515 worth of shares (4,231 units at $27.54) and covered exercise/tax liability with 1,739 shares, increasing direct ownership by 2% to 95,624 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong covered exercise/tax liability with 1,121 shares, decreasing direct ownership by 0.95% to 117,348 units (SEC Form 4)

EVP CORP ADMIN CENTER Liawatidewi Yakob covered exercise/tax liability with 963 shares, decreasing direct ownership by 1% to 73,975 units (SEC Form 4)

CEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. covered exercise/tax liability with 8,179 shares, decreasing direct ownership by 0.23% to 2,502,801 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong sold $672,815 worth of shares (15,000 units at $44.85) and exercised 15,000 shares at a strike of $11.33 (SEC Form 4)

Director Prins Richard K sold $437,702 worth of shares (10,000 units at $43.77), gifted 410 shares and exercised 10,000 shares at a strike of $19.52, decreasing direct ownership by 1% to 30,061 units (SEC Form 4)

SENIOR EVP, PRODUCTION CENTER Zhou Rong exercised 6,893 shares at a strike of $14.95 and sold $336,930 worth of shares (6,893 units at $48.88) (SEC Form 4)

Director Prins Richard K exercised 2,500 shares at a strike of $16.69, sold $243,986 worth of shares (5,000 units at $48.80) and gifted 1,000 shares, decreasing direct ownership by 10% to 30,471 units (SEC Form 4)

CEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. gifted 250,000 shares, decreasing direct ownership by 5% to 2,508,554 units (SEC Form 4)

EVP CORP ADMIN CENTER Liawatidewi Yakob sold $271,389 worth of shares (5,214 units at $52.05) and exercised 5,214 shares at a strike of $13.03 (SEC Form 4)