AMPHNasdaq

Amphastar Pharmaceuticals, Inc.

Alert me on AMPH

Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

Sep 24 Sale PETERS WILLIAM J Insider

1 week

−3.5%S&P −0.4%

1 month

−4.3%S&P −0.9%

3 months

Result in36 trading days

6 months

Result in99 trading days

Sep 18 Sale Zhou Rong Insider

1 week

+10.6%S&P +1.3%

1 month

+10.7%S&P +0.6%

3 months

Result in32 trading days

6 months

Result in95 trading days

Sep 4 Sale Zhou Rong Insider

1 week

+3.1%S&P −1.2%

1 month

+11.8%S&P +1.4%

3 months

Result in23 trading days

6 months

Result in86 trading days

Aug 13 Sale PRINS RICHARD K Insider

1 week

+7.4%S&P −2.0%

1 month

+18.5%S&P −2.2%

3 months

Result in7 trading days

6 months

Result in70 trading days

Aug 12 Sale PETERS WILLIAM J Insider

1 week

+8.8%S&P −0.4%

1 month

+19.0%S&P −1.1%

3 months

Result in6 trading days

6 months

Result in69 trading days

Show all 12

Dec 19, 2025 Sale Zhou Rong Insider

1 week

+0.7%S&P +1.1%

1 month

−1.7%S&P +1.2%

3 months

−27.7%S&P −3.8%

6 months

−21.0%S&P +8.3%

Dec 16, 2025 Sale Petersen Floyd F. Insider

1 week

+3.3%S&P +1.6%

1 month

+1.8%S&P +2.2%

3 months

−23.7%S&P −2.5%

6 months

−26.6%S&P +10.9%

Nov 26, 2025 Sale PRINS RICHARD K Insider

1 week

−0.8%S&P +0.7%

1 month

−2.1%S&P +1.5%

3 months

−23.2%S&P +1.3%

6 months

−32.7%S&P +12.2%

Nov 18, 2025 Sale Petersen Floyd F. Insider

1 week

+6.9%S&P +2.3%

1 month

+2.3%S&P +2.5%

3 months

+10.2%S&P +4.8%

6 months

−29.9%S&P +13.2%

Nov 6, 2025 Sale Petersen Floyd F. Insider

1 week

+8.8%S&P +0.3%

1 month

+7.3%S&P +2.0%

3 months

+18.1%S&P +3.8%

6 months

−23.9%S&P +10.9%

Oct 3, 2025 Sale Petersen Floyd F. Insider

1 week

−11.7%S&P −2.4%

1 month

−5.4%S&P +2.1%

3 months

−0.1%S&P +3.1%

6 months

−23.1%S&P −0.9%

Sep 4, 2025 Sale Petersen Floyd F. Insider

1 week

−1.7%S&P +1.3%

1 month

−8.4%S&P +3.4%

3 months

−5.5%S&P +5.6%

6 months

−33.7%S&P +4.2%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for AMPH

50 held · newest 550 held · newest 2

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Aeon news and offers by email

New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters

No lobbying reports on file.