PETERS WILLIAM J
CFO, EVP & TREASURER
PETERS WILLIAM J has filed 6 SEC Form 4 filings (8 transaction rows) across 1 company, with disclosures dating back to 2026. 6 of those filings fall inside the rolling window. Most recent filing: Sep 23, 2026.
On the most recent filing, PETERS WILLIAM J is listed as CFO, EVP & TREASURER at Amphastar Pharmaceuticals, Inc. Inside the rolling window, PETERS WILLIAM J reported no open-market purchases and 2 open-market sales totaling $287K in AMPH. The largest disclosed transaction in the window is a sale of 8,180 AMPH shares on Aug 7, 2026, worth $184K.
Companies traded
Other insiders at AMPH
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$287K
reported sales (SEC code S)
Companies
1
in the rolling window
Frequently asked questions
How many SEC Form 4 filings has PETERS WILLIAM J made?
PETERS WILLIAM J has filed 6 SEC Form 4 filings (8 transaction rows) across 1 company since 2026.
Which companies does PETERS WILLIAM J trade?
PETERS WILLIAM J has filed SEC Form 4 disclosures for 1 company, including AMPH.
When was PETERS WILLIAM J's most recent SEC Form 4 filing?
PETERS WILLIAM J's most recent SEC Form 4 filing on Tracefour is dated Sep 23, 2026.
What is PETERS WILLIAM J's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, PETERS WILLIAM J is listed as CFO, EVP & TREASURER.
What is PETERS WILLIAM J's total buy and sell value in the current window?
Inside the rolling retention window, PETERS WILLIAM J bought $0 and sold $287K based on SEC Form 4 filings.
What was PETERS WILLIAM J's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 8,180 AMPH shares on 2026-08-07, worth $184K, per SEC Form 4 filings.