Security record
MGNI
Magnite, Inc. · Communication Services · Advertising Agencies
101Tracked holders
-1Δ holders
92.35MShares held
$1.75BReported value
+9New positions
−12Exits
Momentum inputs (comparable managers):
holder breadth -1.0% ·
share flow +7.9% ·
net new positions -3.0%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 101 | -1 | 92.35M | $1.75B | +9 | −12 |
| Q1 2026 | 107 | +5 | 86.26M | $1.03B | +8 | −3 |
| Q4 2025 | 102 | -2 | 99.58M | $1.62B | — | −2 |
| Q3 2025 | 19 | +4 | 66.20M | $1.44B | +4 | −1 |
| Q2 2025 | 13 | -1 | 54.58M | $1.32B | +1 | −2 |
| Q1 2025 | 11 | -1 | 13.35M | $152.28M | — | −1 |
| Q4 2024 | 12 | +1 | 14.99M | $238.72M | +1 | — |
| Q3 2024 | 10 | 0 | 14.78M | $204.65M | — | — |
| Q2 2024 | 10 | — | 8.59M | $114.16M | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 12.71M | +9.1% | $241.30M | 0.0% | ▲ Add | 5 | SEC ↗ ×15 |
| 2 | Fidelity (FMR) ✦ | 7.76M | +72.2% | $147.27M | 0.0% | ▲ Add | 5 | SEC ↗ ×4 |
| 3 | Vanguard Capital Management Llc | 6.23M | +0.6% | $118.15M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | Wellington Management ✦ | 6.04M | -34.2% | $114.72M | 0.0% | ▼ Trim | 9 | SEC ↗ ×5 |
| 5 | Dimensional Fund Advisors Lp | 5.26M | +32.0% | $99.84M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 6 | Boston Partners | 5.01M | +6.2% | $95.85M | 0.1% | ▲ Add | 3 | SEC ↗ ×3 |
| 7 | American Century Companies Inc | 4.62M | -0.1% | $87.74M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 8 | Capital Research Global Investors | 3.87M | -22.9% | $73.44M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 9 | Nuveen, LLC | 3.79M | +5.7% | $72.03M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 10 | Geode Capital Management ✦ (passive) | 3.79M | +6.7% | $71.95M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 11 | State Street Global Advisors ✦ (passive) | 3.53M | +11.5% | $66.96M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 12 | Canada Pension Plan Investment Board | 3.00M | +6403.7% | $56.85M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 13 | Jane Street Group, Llc | 2.20M | +31.8% | $41.74M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 14 | Morgan Stanley ✦ | 1.99M | +114.9% | $37.80M | 0.0% | ▲ Add | 4 | SEC ↗ ×7 |
| 15 | Qube Research & Technologies Ltd | 1.96M | +195.9% | $37.12M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | Northern Trust Corp | 1.55M | +17.4% | $29.48M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 17 | Goldman Sachs Group ✦ | 1.47M | -2.3% | $27.84M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 18 | Victory Capital Management Inc | 1.24M | -2.5% | $23.45M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | Charles Schwab Investment… | 1.20M | +1.9% | $22.84M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 20 | Bank Of America Corp /De/ | 1.18M | +5.0% | $22.43M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 21 | Bank of New York Mellon Corp | 1.16M | +2.1% | $22.06M | 0.0% | ▲ Add | 3 | SEC ↗ ×9 |
| 22 | Millennium Management ✦ | 764.82K | -38.0% | $14.52M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 23 | UBS Group AG | 746.35K | +65.7% | $14.17M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 24 | Balyasny Asset Management L.P. | 666.55K | -55.6% | $12.65M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 25 | Ameriprise Financial Inc | 619.57K | New | $11.76M | 0.0% | New | 1 | SEC ↗ ×3 |
| 26 | Nomura Asset Management Co Ltd | 553.90K | -6.7% | $10.51M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 27 | Bank Of Montreal /Can/ | 533.76K | New | $10.13M | 0.0% | New | 1 | SEC ↗ ×4 |
| 28 | Principal Financial Group Inc | 497.52K | +11.6% | $9.44M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 29 | Citadel Advisors ✦ | 472.87K | -55.1% | $8.97M | 0.0% | ▼ Trim | 9 | SEC ↗ ×2 |
| 30 | Susquehanna International Group, Llp | 461.85K | +50.0% | $8.77M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 31 | JPMorgan Chase ✦ | 407.02K | -16.4% | $7.89M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 32 | Nordea Investment Management Ab | 386.33K | -8.2% | $7.38M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 33 | Commonwealth Equity Services, Llc | 368.20K | +2.4% | $6.99M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 34 | UBS AM, a distinct business unit of… | 364.64K | +12.9% | $6.92M | 0.0% | ▲ Add | 3 | SEC ↗ ×9 |
| 35 | Marshall Wace ✦ | 341.86K | +705.0% | $6.49M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 36 | Alyeska Investment Group, L.P. | 326.84K | New | $6.20M | 0.0% | New | 1 | SEC ↗ |
| 37 | Raymond James Financial Inc | 309.93K | +6.2% | $5.88M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 38 | Swiss National Bank | 289.70K | +1.9% | $5.50M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 39 | Barclays Plc | 233.69K | +29.4% | $4.44M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 40 | Squarepoint Ops LLC | 230.23K | -23.5% | $4.37M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 41 | Invesco Ltd. | 222.21K | -15.0% | $4.22M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 42 | Cerity Partners LLC | 200.98K | +98.6% | $3.81M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 43 | T. Rowe Price ✦ | 199.44K | +20.6% | $3.79M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 44 | Voya Investment Management Llc | 196.66K | -6.6% | $3.73M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 45 | Rhumbline Advisers | 195.81K | +8.8% | $3.72M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 46 | AQR Capital Management ✦ | 176.60K | +45.7% | $3.35M | 0.0% | ▲ Add | 7 | SEC ↗ ×6 |
| 47 | State Of Wisconsin Investment Board | 172.28K | -7.1% | $3.27M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 48 | Tidal Investments LLC | 165.84K | +24.0% | $3.15M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 49 | Sei Investments Co | 165.55K | -52.8% | $3.14M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 50 | Deutsche Bank Ag\ | 165.04K | +18.2% | $3.13M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 51 | LPL Financial LLC | 163.84K | +5.4% | $3.11M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 52 | Quantinno Capital Management LP | 161.78K | +26.3% | $3.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 53 | Wells Fargo & Company/Mn | 137.40K | +107.8% | $2.61M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 54 | Franklin Resources Inc | 122.34K | +11.6% | $2.32M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 55 | Legal & General Group Plc | 117.01K | -4.1% | $2.22M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 56 | Alliancebernstein L.P. | 144.84K | -35.1% | $1.72M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 57 | Citigroup Inc | 87.70K | +453.0% | $1.66M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 58 | Creative Planning | 86.65K | +20.1% | $1.64M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 59 | Envestnet Asset Management Inc | 85.62K | +9.4% | $1.63M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 60 | State Board Of Administration Of… | 84.63K | +121.4% | $1.61M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 61 | Bnp Paribas Financial Markets | 77.96K | +147.8% | $1.48M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 62 | Russell Investments Group, Ltd. | 74.44K | +51.6% | $1.41M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 63 | Manufacturers Life Insurance… | 71.02K | +10.0% | $1.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 64 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 66.50K | -0.3% | $1.26M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 65 | Zurcher Kantonalbank (Zurich… | 64.71K | 0.0% | $1.23M | 0.0% | Held | 3 | SEC ↗ |
| 66 | GAMCO Investors ✦ | 63.10K | +4.0% | $1.20M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 67 | Stifel Financial Corp | 53.89K | +15.6% | $1.02M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 68 | Man Group plc | 53.05K | -92.0% | $1.01M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 69 | New York State Common Retirement… | 50.73K | +38.1% | $962,761 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 70 | Royal Bank Of Canada | 49.18K | -7.1% | $934,000 | 0.0% | ▼ Trim | 3 | SEC ↗ ×7 |
| 71 | Hsbc Holdings Plc | 49.09K | +27.9% | $932,696 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 72 | Allspring Global Investments… | 43.12K | +3.2% | $874,555 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 73 | Two Sigma Investments ✦ | 42.66K | -89.2% | $809,668 | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 74 | Brown Advisory Inc | 36.31K | +15.2% | $689,240 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 75 | D. E. Shaw & Co. ✦ | 35.72K | New | $677,947 | 0.0% | New | 1 | SEC ↗ |
| 76 | IMC-Chicago, LLC | 33.51K | +20.6% | $635,982 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 77 | Mercer Global Advisors Inc /Adv | 28.37K | +53.7% | $538,539 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 78 | Pictet Asset Management Holding SA | 25.75K | 0.0% | $488,830 | 0.0% | Held | 3 | SEC ↗ |
| 79 | Universal- Beteiligungs- und… | 24.83K | +4.8% | $471,254 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 80 | Prudential Financial Inc | 24.16K | +7.6% | $458,595 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | Captrust Financial Advisors | 21.15K | +13.4% | $401,446 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 82 | ProShare Advisors LLC | 18.91K | -8.3% | $358,892 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 83 | Corient Private Wealth LP | 17.31K | New | $328,527 | 0.0% | New | 1 | SEC ↗ |
| 84 | Parallax Volatility Advisers, L.P. | 16.74K | +27.5% | $317,782 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 85 | Northwestern Mutual Wealth… | 15.24K | +408.2% | $289,350 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 86 | Wealth Enhancement Advisory… | 14.16K | New | $288,035 | 0.0% | New | 1 | SEC ↗ |
| 87 | Ensign Peak Advisors, Inc | 13.66K | 0.0% | $259,229 | 0.0% | Held | 3 | SEC ↗ |
| 88 | Neuberger Berman Group LLC | 12.92K | New | $245,145 | 0.0% | New | 1 | SEC ↗ ×2 |
| 89 | Truist Financial Corp | 12.08K | 0.0% | $229,202 | 0.0% | Held | 3 | SEC ↗ ×2 |
| 90 | Cetera Investment Advisers | 11.19K | -14.9% | $212,386 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 91 | Osaic Holdings, Inc. | 10.67K | +9.8% | $202,513 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 92 | Jones Financial Companies Lllp | 5.11K | -27.6% | $95,729 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 93 | Rockefeller Capital Management L.P. | 4.98K | +4.2% | $94,559 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 94 | Pnc Financial Services Group, Inc. | 3.71K | -2.0% | $70,358 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 95 | BNP Paribas Asset Management… | 2.41K | -10.1% | $45,666 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 96 | Fifth Third Bancorp | 1.49K | -97.5% | $28,366 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 97 | National Bank Of Canada /Fi/ | 774 | New | $14,682 | 0.0% | New | 1 | SEC ↗ |
| 98 | Us Bancorp \De\ | 772 | -34.4% | $14,652 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 99 | TD Waterhouse Canada Inc. | 115 | New | $2,332 | 0.0% | New | 1 | SEC ↗ |
| 100 | Federated Hermes, Inc. | 63 | -11.3% | $1,196 | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Ameriprise Financial Inc | $11.76M | 0.0% |
| Bank Of Montreal /Can/ | $10.13M | 0.0% |
| Alyeska Investment Group, L.P. | $6.20M | 0.0% |
| D. E. Shaw & Co. | $677,947 | 0.0% |
| Corient Private Wealth LP | $328,527 | 0.0% |
| Wealth Enhancement Advisory… | $288,035 | 0.0% |
| Neuberger Berman Group LLC | $245,145 | 0.0% |
| National Bank Of Canada /Fi/ | $14,682 | 0.0% |
| TD Waterhouse Canada Inc. | $2,332 | 0.0% |
Exited
| Pacer Advisors, Inc. | $5.96M | was 0.0% |
| Capital World Investors | $5.43M | was 0.0% |
| First Eagle Investment… | $5.35M | was 0.0% |
| Walleye Trading LLC | $2.13M | was 0.0% |
| Holocene Advisors, LP | $1.21M | was 0.0% |
| Tudor Investment Corp Et Al | $874,903 | was 0.0% |
| Jennison Associates Llc | $687,246 | was 0.0% |
| Group One Trading Llc | $296,988 | was 0.0% |
| Amundi | $271,066 | was 0.0% |
| Gotham Asset Management | $153,074 | was 0.0% |
| Simplex Trading, Llc | $134,434 | was 0.0% |
| Optiver Holding B.V. | $66,279 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 295 holders, 130.58M shares, $1.54B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Sep 17
Knopper Douglas S
Director · 37.34K sh · $981,216
Sep 17
Caine Paul
Director · 7.50K sh · $198,750
Sep 14
Spillane Robert F
Director · 10.36K sh · $246,225
Sep 14
Buonasera David
Officer · 1.17K sh · $27,960
Sep 11
Evans Katie Seitz
Officer · 14.00K sh · $335,928
Sep 10
Caine Paul
Director · 5.00K sh · $117,650
Sep 10
Saltz Aaron
Officer · 40.00K sh · $936,400
Sep 09
Evans Katie Seitz
Officer · 11.10K sh · $260,406
Sep 08
Evans Katie Seitz
Officer · 32.28K sh · $762,895
Sep 02
Buonasera David
Officer · 1.04K sh · $26,075
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Aug 13
SC 13G/A — WELLINGTON MANAGEMENT GROUP LLP
Aug 06
SC 13G — FMR LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2026 ·
Methodology ·
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