How many SEC Form 4 insider filings does AMPH have?

Amphastar Pharmaceuticals, Inc. (AMPH) has 11 SEC Form 4 filings (14 transaction rows) in the rolling 365-day window, disclosed by 0 distinct insiders. Most recent filing: Jul 13, 2026.

When was the most recent SEC Form 4 filing for AMPH?

The most recent Form 4 filing for AMPH on Tracefour is dated Jul 13, 2026.

AMPH

Name: AMPH Insider Trading Activity
Creator: Tracefour
License: https://www.usa.gov/government-works
Keywords: AMPH, insider trading, SEC Form 4, insider transactions

Amphastar Pharmaceuticals, Inc.

Amphastar Pharmaceuticals, Inc. (AMPH) has 11 SEC Form 4 filings (14 transaction rows) in the rolling window, disclosed by 0 distinct insiders. Most recent filing: Jul 13, 2026.

Industry:Drug Manufacturers - Specialty & Generic
CEO:Yongfeng Zhang
Employees:2,028
HQ:Rancho Cucamonga, CA, US
IPO:2014-06-25

No open-market insider trades for AMPH (Amphastar Pharmaceuticals, Inc.) in the last 365 days.

Why this page may be quiet. Tracefour displays Form 4 open-market purchases (P) and sales (S): the two transaction codes that signal directional conviction. Restricted stock grants, option exercises, gifts, and tax-withholding sales are filed but intentionally not shown: they're disclosure mechanics, not buy/sell decisions.

Many large-cap executives trade through pre-scheduled 10b5-1 plans set months in advance and batch-disclosed each quarter, so the latest filing on EDGAR for a mega-cap can be weeks old without any insider actually choosing to trade in that window.

See all Form 4 filings on SEC EDGAR ↗

Related companies

Amphastar Pharmaceuticals, Inc. is in the Healthcare sector.