Knopper Douglas S Insider Trades & Stock Holdings

Director · Magnite, Inc. · Latest filing Sep 17, 2026

Knopper Douglas S, Director at Magnite, Inc. has 1 Form 4 trade on file since Sep 17, 2026. Open-market activity: 0 purchases ($0) and 1 sale ($981.22K), net -$981.22K. Latest filing: disposed of 37.34K shares of $MGNI on Sep 17, 2026 at $26.28.

Trades on file

1

Open-market bought

$0

Open-market sold

$981.22K

Net open-market

-$981.22K

Latest filing

Sep 17, 2026

All insider trades by Knopper Douglas S

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Sep 17, 2026	$MGNI	Sell (Open-market sale) 10b5-1	37.34K	$26.28	$981.22K			-6.1%			Director		—

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Knopper Douglas S traded

• $MGNI

Frequently asked questions

Has Knopper Douglas S been buying or selling stock?

Knopper Douglas S has 0 open-market purchases and 1 open-market sale on file, net -$981.22K. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Knopper Douglas S's latest insider trade?

disposed of 37.34K shares of $MGNI on Sep 17, 2026 at $26.28.

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.