Knopper Douglas S
SEC Form 4 insider trading activity
Knopper Douglas S has filed 4 SEC Form 4 filings (5 transaction rows) across 1 company, with disclosures dating back to 2026. 4 of those filings fall inside the rolling window. Most recent filing: Sep 18, 2026.
On the most recent filing, Knopper Douglas S is listed as Director at MAGNITE, INC. Inside the rolling window, Knopper Douglas S reported no open-market purchases and 4 open-market sales totaling $2.7M in MGNI. The largest disclosed transaction in the window is a sale of 37,337 MGNI shares on Sep 17, 2026, worth $981K.
Companies traded
Other insiders at MGNI
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$2.7M
reported sales (SEC code S)
Companies
1
in the rolling window
Frequently asked questions
How many SEC Form 4 filings has Knopper Douglas S made?
Knopper Douglas S has filed 4 SEC Form 4 filings (5 transaction rows) across 1 company since 2026.
Which companies does Knopper Douglas S trade?
Knopper Douglas S has filed SEC Form 4 disclosures for 1 company, including MGNI.
When was Knopper Douglas S's most recent SEC Form 4 filing?
Knopper Douglas S's most recent SEC Form 4 filing on Tracefour is dated Sep 18, 2026.
What is Knopper Douglas S's total buy and sell value in the current window?
Inside the rolling retention window, Knopper Douglas S bought $0 and sold $2.7M based on SEC Form 4 filings.
What was Knopper Douglas S's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 37,337 MGNI shares on 2026-09-17, worth $981K, per SEC Form 4 filings.