InsiderTrades

Form 4 for MGNI MAGNITE, INC.

Accepted 2026-06-18 19:51:24 ET · period of report 2026-06-17 · accession 0001193125-26-276264 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
T 2026-06-18 19:51 2026-06-17 MGNI Buckley Sean Patrick See Remarks S - Sale $19.00 -19.2K 373.5K -5% -$365.4K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-06-17 S D 19,233 $19.00 373,514 D — — (F1) The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 10, 2025.