Magnite, Inc. (MGNI) ownership: Top institutional holder: VANGUARD GROUP INC ($240.25M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 14802630.00 | $240.25M | 2025-12-31 |
| BlackRock, Inc. | 11657496.00 | $138.49M | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 9191077.00 | $109.19M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7726205.00 | $91.79M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6190403.00 | $73.54M | 2026-03-31 |
| Capital Research Global Investors | 5020289.00 | $59.64M | 2026-03-31 |
| Boston Partners | 4719863.00 | $56.08M | 2026-03-31 |
| AMERICAN CENTURY COMPANIES INC | 4626816.00 | $54.97M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 |
Back to MGNI overview · MGNI earnings · All congressional trades
Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.