MAGNITE, INC. (MGNI) Stock
MGNI has an Alpha Score of 52 out of 100 (weak), computed on Oct 30, 2026 from 3 of 4 sub-scores. 4 of the hedge funds AlphaScala tracks reported MGNI in 13F filings for the quarter ended Jun 30, 2026; the largest reported position is Millennium Management's at $14.52M. Company insiders reported 0 open-market buys and 20 sales on SEC Form 4 in the 90 days to Nov 3, 2026. Its trailing P/E ratio is 19.3 and its net margin 22.5% (key statistics as of Oct 30, 2026).
What is MGNI's Alpha Score?
How it works →Alpha Score of 52 reflects moderate overall profile with weak momentum, moderate value, strong quality. Based on 3 of 4 signals – score is capped at 90 until remaining data ingests.
Computed from 3 of 4 sub-scores; a sub-score is left out when its inputs are missing, and the composite is capped accordingly.
Computed Oct 30, 2026
A rules-based research rating, not a recommendation to buy or sell.
Which hedge funds own MGNI?
From 13F filings| Fund | Shares Held | Position Value | Change vs prior Q |
|---|---|---|---|
| Millennium Management Israel Englander | 765K | $14.52M | -38% |
| Citadel Ken Griffin | 473K | $8.97M | -55% |
| Marshall Wace | 342K | $6.49M | +705% |
| D.E. Shaw David Shaw | 36K | $677.9K | NEW |
13F holdings as of Jun 30, 2026
Explore all tracked funds →Are MAGNITE, INC. insiders buying or selling?
SEC Form 4 filings| Date | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| Oct 12, 26 | Caine Paul | Director | SELL | 12.5K | $316K |
| Sep 17, 26 | Knopper Douglas S | Director | SELL | 37.3K | $981K |
| Sep 17, 26 | Caine Paul | Director | SELL | 7.5K | $199K |
| Sep 14, 26 | Spillane Robert F | Director | SELL | 10.4K | $246K |
| Sep 14, 26 | Buonasera David | CHIEF TECHNOLOGY OFFICER | SELL | 1.2K | $28K |
| Sep 11, 26 | Evans Katie Seitz | See Remarks | SELL | 14.0K | $336K |
| Sep 10, 26 | Caine Paul | Director | SELL | 5.0K | $118K |
| Sep 10, 26 | Saltz Aaron | CHIEF LEGAL OFFICER | SELL | 40.0K | $936K |
| Sep 9, 26 | Evans Katie Seitz | See Remarks | SELL | 11.1K | $260K |
| Sep 8, 26 | Evans Katie Seitz | See Remarks | SELL | 32.3K | $763K |
SEC Form 4 filings as of Nov 3, 2026
See cluster-buy signals across all tickers →What are MGNI's key statistics?
Key statistics as of Oct 30, 2026
How does MGNI's valuation compare with the Communication Services sector?
| Metric | MGNI | Communication Services median | Companies in median |
|---|---|---|---|
| P/E ratio | 19.3 | 17.6 | 53 |
| Net margin | 22.49% | 8.78% | 64 |
| Return on equity | 18.62% | 11.47% | 66 |
Medians over the Communication Services stocks whose key statistics were refreshed in the last 35 days (newest Nov 4, 2026). P/E excludes loss-making companies.
MGNI price chart
Powered by TradingViewWhat does MAGNITE, INC. do?
Magnite, Inc. is the world's largest independent sell-side advertising company, operating an omni-channel programmatic platform that connects publishers and buyers in the digital advertising ecosystem. Publishers leverage Magnite's technology, including the SpringServe ad server, ClearLine for unified video campaign activation, and Magnite Access for audience data solutions, to monetize premium inventory across connected TV (CTV), online video, display, audio, mobile, and other formats. Buyers, such as advertisers, agencies, and demand-side platforms, access brand-safe, high-quality supply through curated marketplaces, real-time bidding, and advanced targeting capabilities. The platform emphasizes independence from walled gardens, ensuring transparency, privacy compliance, and global scale with direct integrations to premium CTV publishers and omnichannel inventory. Magnite serves media owners worldwide, powering advertising that reaches audiences across streaming TV, websites, apps, and linear TV, while providing yield management tools for efficient monetization. Incorporated in 2007 and headquartered in New York, New York, Magnite focuses on innovation in ad tech to foster long-term partnerships between content creators and marketers.