OQRO

Feed News

Explore

Insider trades Fund moves Congressional trades Federal contracts Screener

Yours

Watchlist Alerts Saved Ask Claude or ChatGPT

Create a free account Sign in

OQRO

Search/

Loading…

Officer exercised or converted 10K AMPH derivative securities | OQRO

Home
Insider trades
Amphstar Pharmaceuticals, Inc.
Officer exercised or converted 10K AMPH derivative securities

Insider trades

Insider trade

Officer exercised or converted 10K AMPH derivative securities

Traded Sep 16, 2026 · Filed Sep 17, 2026

AMPAmphstar Pharmaceuticals, Inc.AMPH

10K
Shares · @ $13.35

Why it stands out

Derivative exercise or conversion — not an open-market buy.

Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell

View the official recordSEC Form 4 — Statement of Changes in Beneficial Ownership

All the details

Dates, kept separate

Transaction date: Sep 16, 2026
Reporting period: Not applicable
Filed with the SEC: Sep 17, 2026

OfficerOption exercise

Context

Classification

option exercise

Code M — exercise or conversion of a derivative security

Planned / mechanical clue

None found in footnotes

Only flagged when a footnote says so; never inferred

Source receipt

Record ID: 0001645326-26-000014

Ask Claude or ChatGPT about these filings. Connect OQRO in a minute, then ask things like “which insiders bought this week?”

Filed / recorded

Sep 17, 2026, 10:19 PM UTC

Added to OQRO

Oct 6, 2026, 9:54 PM UTC

Parser

form4-xml-v2

Data quality

Verified: identifiers matched exactly

Issuer

Amphastar Pharmaceuticals, Inc.

Issuer CIK

1297184

Ticker

AMPH

Reporting person

Rong Zhou

Relationship

Officer

Officer title

SENIOR EVP, PRODUCTION CENTER

Security

Common Stock

Table

Non-derivative (Table I)

Transaction date

Sep 16, 2026

Transaction code

Shares / units

10,000

Price per share

$13.35

Acquired / disposed

Acquired (A)

Shares owned after

179,203

Ownership form

Direct

Amendment

Around the same time

William J Peters (CFO, EVP & TREASURER) sold ~$103K of Amphstar Pharmaceuticals, Inc.

Scheduled in advanceFiled 2w ago

Rong ZhouSENIOR EVP, PRODUCTION CENTER

Filed 3w ago

Sold

~$239K10K sh @ $23.94

Traded Sep 16 · filed 1 day laterNot under a reported trading plan

Amphstar Pharmaceuticals's SENIOR EVP, PRODUCTION CENTER sold $239K of Amphstar Pharmaceuticals shares. The filing does not indicate a pre-arranged trading plan.

More Official record

Rong ZhouSENIOR EVP, PRODUCTION CENTER

Filed 3w ago

10KDerivative units

Traded Sep 16 · filed 1 day later

Derivative exercise or conversion — not an open-market buy.

More Official record