Transaction · 0001966857-26-000013

Buonasera David

Buonasera David, CTO, reported an open-market or private sale at MAGNITE, INC. involving 5371.000000 shares for an estimated $125788.82. Reported holdings after the transaction were 247363.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCTO
MGNIMAGNITE, INC.
Filing timeSep 03
Trade dateSep 01, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$24.63
Pre-filing
1mo ago -21.6%1w ago -4.4%1d ago -4.6%
Returns since
7d +0.0%30d +0.0%90d +0.0%180d +0.0%1y +0.0%

MGNI price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
MGNI since 2026-09-03Filed yesterday · 1 day of post-filing data
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001966857-26-000013
Common Stock
Transaction date
Sep 01, 2026
Filed Sep 03, 2026, 08:56 PM · 2d delay
Shares
5.37k sh
$2.34k per share
Estimated value
-$12.5M
Computed from shares × price
Holdings after
247k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Cluster Selling Direct Ownership 10b5-1 Detected
0score
Filing-only score

0

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

CHIEF TECHNOLOGY OFFICER

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 11, 2025.

Original filing · 0001966857-26-000013
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

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