# MAGNITE INC COM

MAGNITE INC COM is a security (CUSIP 55955D100) tracked across SEC portfolio filings. 310 institutional managers reported $1.8B on Form 13F as of 2026-06-30; 29 registered fund positions totaling $139.8M via N-PORT as of 2026-05-31.

## Summary

- Issuer: MAGNITE INC
- Class: COM
- CUSIP: 55955D100
- Asset category: EC
- 13F holders: 310
- 13F value: $1.8B
- 13F period: 2026-06-30
- N-PORT fund positions: 29
- N-PORT value: $139.8M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 310 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $240.2M | 14,802,630 |
| BlackRock, Inc. | New York, NY | $138.5M | 11,657,496 |
| WELLINGTON MANAGEMENT GROUP LLP | BOSTON, MA | $109.2M | 9,191,077 |
| Boston Partners | BOSTON, MA | $95.9M | 5,013,835 |
| Capital Research Global Investors | Los Angeles, CA | $59.6M | 5,020,289 |
| AMERICAN CENTURY COMPANIES INC | KANSAS CITY, MO | $55.0M | 4,626,816 |
| FMR LLC | BOSTON, MA | $53.5M | 4,507,419 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $47.3M | 3,983,674 |
| Nuveen, LLC | CHARLOTTE, NC | $42.6M | 3,590,025 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $42.2M | 3,553,790 |
| [Nine Ten Capital Management LLC](https://search.stillhousedata.com/firm/171420) | CHICAGO, IL | $41.4M | 3,481,283 |
| [Edenbrook Capital, LLC](https://search.stillhousedata.com/firm/283465) | Mt. Kisco, NY | $40.4M | 2,798,036 |
| STATE STREET CORP | BOSTON, MA | $37.6M | 3,163,139 |
| [Blue Grotto Capital, LLC](https://search.stillhousedata.com/firm/299869) | ATLANTA, GA | $32.4M | 1,706,741 |
| [Granahan Investment Management, LLC](https://search.stillhousedata.com/firm/107745) | WALTHAM, MA | $30.3M | 2,553,413 |

## Top fund holders (N-PORT)

_Showing 15 of 29 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [SMALLCAP World Fund Inc](https://search.stillhousedata.com/fund/S000009599) | SMALLCAP World Fund Inc | $63.5M | 7.83% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $19.0M | 2.33% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $10.5M | 5.98% |
| [Oberweis Micro-Cap Fund](https://search.stillhousedata.com/fund/S000010231) | OBERWEIS FUNDS | $7.4M | 70.18% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $5.5M | 2.54% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $5.3M | 7.10% |
| [Embark Small Cap Equity Fund](https://search.stillhousedata.com/fund/S000083503) | Harbor Funds II | $3.7M | 64.39% |
| [VANGUARD STRATEGIC EQUITY FUND](https://search.stillhousedata.com/fund/S000002593) | VANGUARD HORIZON FUNDS | $3.3M | 3.26% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $2.8M | 5.75% |
| ROYCE MICRO-CAP TRUST, INC. | ROYCE MICRO-CAP TRUST, INC. | $2.5M | 36.31% |
| [Small Cap Portfolio](https://search.stillhousedata.com/fund/S000001917) | BNY MELLON VARIABLE INVESTMENT FUND | $2.5M | 79.15% |
| [TIFF MULTI-ASSET FUND](https://search.stillhousedata.com/fund/S000006387) | TIFF Investment Program | $2.3M | 16.52% |
| ROYCE SMALL-CAP TRUST, INC. | ROYCE SMALL-CAP TRUST, INC. | $2.2M | 9.85% |
| [VIP Balanced Portfolio](https://search.stillhousedata.com/fund/S000007730) | Variable Insurance Products Fund III | $2.2M | 2.69% |
| [VOYA SMALL COMPANY PORTFOLIO](https://search.stillhousedata.com/fund/S000008709) | Voya VARIABLE PORTFOLIOS INC | $1.4M | 74.37% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/55955d100.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.