| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Day David | CHIEF FINANCIAL OFFICER | C/O MAGNITE, INC., 1250 BROADWAY, 15TH FLOOR, NEW YORK | /s/ Aaron Saltz, attorney-in-fact | 19 Aug 2025 | 0001523288 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MGNI | Common Stock | Gift | $0 | -26,374 | -6.25% | $0 | 395,472 | 15 Aug 2025 | Direct |