$MGNI is held by 8 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 1.82%, with an average of 0.25% of portfolio. Largest holder: Blue Grotto Capital, LLC at 1.82%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.
MAGNITE INC
13F holders
286
Net 13F flow · Q
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Insider buys · 90d
0
Insider net · 90d
—
Congress · 90d
0
Convergence
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Institutional holders
Top 10 of 286 · Source: 13F-HR01
Generation Investment Management LLP
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02
Willow Creek Wealth Management Inc.
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03
Envestnet Asset Management Inc.
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04
Massachusetts Institute of Technology
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05
Exor N.V.
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06
Solus Alternative Asset Management LP
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07
Gardner Russo & Quinn LLC
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08
Axa S.a.
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09
State Street
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10
Narus Financial Partners, LLC
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Each fund name links to that filer's expert page. Share counts and per-fund weights are pending the 13F ingest fix (portfolios_expertholding.units is currently mis-populated — see the same caveat on the fund detail page's holdings table). Quarter-over-quarter delta ships with the metrics pipeline.
Smart Money · top-200 alpha cohort
8 holders · Q1 202601
Blue Grotto Capital, LLC
1.82% ↓ 0.9pp
α +12.7pts
02
Caption Management, LLC
0.13% held
α +15.5pts
03
Wellington Management Group LLP
0.02% held
α +10.5pts
04
Fulton Bank, N.a.
0.01% held
α +23.8pts
05
Level Financial Advisors
0.00% held
α +30.9pts
06
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
0.00% held
α +27.5pts
07
Nisa Investment Advisors, LLC
0.00% held
α +16.6pts
08
Citigroup Inc.
0.00% held
α +26.3pts
Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.
Insider activity · last 90 days
50 transactions · 13 filersTransaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.
Congress trades · last 90 days
No Congress trades
No STOCK Act filings reference $MGNI in the recent window.
Convergence · Pattern Engine ships in v1.1
30-day windowIn development
Convergence detection for $MGNI lands with the Pattern Engine.
Once the Pattern Engine ships, this section will surface every active convergence event involving $MGNI — the institutional managers and Congress members on the same name, the 30-day window, and the combined position size.
Source data: SEC EDGAR · 13F-HR · Form 4 · CapitolTrades · Last refreshed 11:07 UTC.