Insider trade

Amphstar Pharmaceuticals, Inc. (AMPH)Officer sold ~$311K

Rong Zhou, Officer at Amphstar Pharmaceuticals, Inc., sold ~$311K of Amphstar Pharmaceuticals, Inc. shares.

~$311K
Approx. value · 7,000 sh @ $44.43: 118K
Holds after · shares reported

Traded: Dec 12, 2024
Filed: Dec 16, 2024

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

Nov 6, 2024Insider · 2 peopleInsiders: 2 sales (~$658K)
Nov 12, 2024Insider · 2 peopleInsiders: 2 sales (~$581K)
Dec 9, 2024InsiderDirector sold ~$438K of AMPH shares in the open market
Dec 12, 2024 · this disclosureInsiderOfficer sold ~$311K of AMPH shares in the open market

What came next

Dec 13, 2024InsiderOfficer sold ~$362K of AMPH shares in the open market
Mar 4, 2025InsiderCFO sold ~$117K of AMPH shares in the open market
Mar 6, 2025InsiderDirector sold ~$28K of AMPH shares in the open market
Apr 1, 2025InsiderDirector sold ~$14K of AMPH shares in the open market

View the official recordSEC Form 4

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Amphstar Pharmaceuticals, Inc.

For Amphstar Pharmaceuticals, Inc., OQRO holds 5 insider filings (SEC Form 4 or Form 144) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its AMPH page.

Other recent filings by Rong Zhou, SENIOR EVP, PRODUCTION CENTER

The full history of Rong Zhou, SENIOR EVP, PRODUCTION CENTER is on the profile page.

How this filing works

Other disclosures at Amphstar Pharmaceuticals, Inc.

Everything OQRO holds on this company is on its AMPH page.

This is one filing. OQRO holds the rest

Insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings and federal contract awards, each one in plain words next to its official filing. On this page it opens why the trade stands out, what the company did around that time, the price since, and every field of the form.

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