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Amphastar Pharmaceuticals, Inc. planned insider sales

In the twelve months since 11 October 2025 insiders at Amphastar Pharmaceuticals, Inc. filed 11 Form 144 notices of planned sales, 127,838 shares worth $3.2 million at the time of filing, from 5 sellers. The latest, filed 21 September 2026: Peters William J (officer), 4,139 shares worth $103,475, planned for around 21 September 2026 through UBS Financial Services, Inc..

FiledSellerRelationshipSharesValuePlanned saleBrokerHow acquiredFiling
21 September 2026Peters William JOfficer4,139$103,47521 September 2026UBS Financial Services, Inc.RSU VestingForm 144
1 September 2026Rong ZhouVice President13,187$290,1141 September 2026UBS Financial Services IncESPP; Option ExerciseForm 144
18 August 2026Floyd PetersenDirector47,101$989,12118 August 2026UBS Financial Services IncOption ExerciseForm 144
11 August 2026Richard PrinsDirector7,973$161,93211 August 2026UBS Financial Services IncRSU VestingForm 144
7 August 2026Peters William JOfficer8,180$183,8867 August 2026UBS Financial Services, Inc.RSU VestingForm 144
11 December 2025Floyd PetersenDirector4,163$333,04011 December 2025UBS Financial Services IncRSU VestingForm 144
10 December 2025Floyd PetersenDirector1,737$43,42510 December 2025UBS Financial Services IncRSU VestingForm 144
28 November 2025Rong ZhouOfficer20,000$500,00028 November 2025UBS Financial Services IncStock Option ExercisingForm 144
25 November 2025Richard PrinsDirector4,179$104,47525 November 2025UBS Financial Services IncStock Option ExercisingForm 144
13 November 2025Floyd PetersenDirector16,679$441,83713 November 2025UBS Financial Services IncStock Option ExerciseForm 144
3 November 2025Petersen Floyd F.Director500$12,6503 November 2025UBS Financial Services, Inc.RSUForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Whether the sale happened shows up later on Form 4, on the insiders page.

Source

Form 144 filings on EDGAR for Amphastar Pharmaceuticals, Inc.: the company's filing index, each notice read from its own XML.

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