Transaction · 0001966857-26-000011

Buonasera David

Buonasera David, CTO, reported a transaction classified as withholding at MAGNITE, INC. involving 8102.000000 shares for an estimated $200362.46. Reported holdings after the transaction were 252734.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

withholdingSEC transaction code FCTO
MGNIMAGNITE, INC.
Filing timeAug 18
Trade dateAug 15, 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
$24.53
Pre-filing
1mo ago -18.8%1w ago +0.8%1d ago +0.8%
Returns since
7d -4.0%30d -6.7%90d -6.7%180d -6.7%1y -6.7%

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 2026-08-18Filed 17 days ago · 30 days of pre-filing context shaded
Loading…
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
withholding
Code F
Identifier
0001966857-26-000011
Common Stock
Transaction date
Aug 15, 2026
Filed Aug 18, 2026, 08:25 PM · 3d delay
Shares
8.10k sh
$2.47k per share
Estimated value
-$20.0M
Computed from shares × price
Holdings after
252k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership
-16score
Filing-only score

-16

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

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

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

    Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the v…

Original filing · 0001966857-26-000011
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

MGNI