MAGNITE INC MGNI
COM · Common Stock · CUSIP 55955D100 · ISIN US55955D1000
American advertising technology and real-time bidding, serving as ad exchange
- SectorTechnology
- IndustryServices-Computer Programming, Data Processing, Etc.
- HeadquartersNew York, NY
- Founded2007
- Websitemagnite.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($2.0m this quarter). Holder counts are more reliable. Shares outstanding: 140.7m as of 2024-10-30, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $13.84. Options: 22 managers hold calls ($51.1m notional), 15 hold puts ($48.2m).
Trends to Q3 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 218 |
| Q4 2022 | 230 |
| Q1 2023 | 223 |
| Q2 2023 | 225 |
| Q3 2023 | 215 |
| Q4 2023 | 217 |
| Q1 2024 | 232 |
| Q2 2024 | 269 |
| Q3 2024 | 280 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 115 | 99 |
| Q1 2023 | 107 | 111 |
| Q2 2023 | 105 | 100 |
| Q3 2023 | 101 | 105 |
| Q4 2023 | 87 | 100 |
| Q1 2024 | 112 | 93 |
| Q2 2024 | 171 | 95 |
| Q3 2024 | 146 | 108 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2023 | $16.3m | $25.7m | 1.58 |
| Q1 2024 | $20.2m | $26.9m | 1.34 |
| Q2 2024 | $38.5m | $36.5m | 0.95 |
| Q3 2024 | $51.1m | $48.2m | 0.94 |
Biggest buyers
| WELLINGTON MANAGEMENT GROUP LLP | Added | +3.7m |
| Driehaus Capital Management LLC | Added | +2.7m |
| MARSHALL WACE, LLP | Added | +2.1m |
| NOMURA ASSET MANAGEMENT CO LTD | New | +1.7m |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC | New | +1.3m |
| Boston Partners | Added | +1.3m |
| Nishkama Capital, LLC | New | +1.0m |
| Nine Ten Capital Management LLC | Added | +969.1k |
| J. Goldman & Co LP | New | +673.7k |
| Qube Research & Technologies Ltd | Added | +596.8k |
Biggest sellers
| FMR LLC | Reduced | -1.7m |
| Granahan Investment Management, LLC | Reduced | -1.2m |
| Edenbrook Capital, LLC | Reduced | -1.1m |
| Bank of New York Mellon Corp | Reduced | -438.2k |
| Verition Fund Management LLC | Reduced | -431.9k |
| iA Global Asset Management Inc. | Sold out | -353.5k |
| Divisadero Street Capital Management, LP | Sold out | -275.9k |
| KENNEDY CAPITAL MANAGEMENT LLC | Reduced | -237.3k |
| Parallax Volatility Advisers, L.P. | Reduced | -181.3k |
| Kopion Asset Management, LLC | Reduced | -168.5k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $7.2m519.8k shares |
| CITADEL ADVISORS LLC | Added | $6.9m500.8k shares |
| SIMPLEX TRADING, LLC | Added | $6.2m445.3k shares |
| J. Goldman & Co LP | New | $5.0m360.0k shares |
| JANE STREET GROUP, LLC | Reduced | $4.0m291.5k shares |
| GTS SECURITIES LLC | Reduced | $3.7m269.9k shares |
| WOLVERINE TRADING, LLC | Added | $3.6m265.6k shares |
| PEAK6 Investments LLC | Reduced | $3.1m227.4k shares |
| ROYAL BANK OF CANADA | New | $2.5m180.0k shares |
| IMC-Chicago, LLC | Added | $2.3m168.6k shares |
Biggest puts
| Parallax Volatility Advisers, L.P. | Added | $25.3m1.8m shares |
| Squarepoint Ops LLC | Added | $15.0m1.1m shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.8m131.6k shares |
| CITADEL ADVISORS LLC | Added | $1.7m120.8k shares |
| IMC-Chicago, LLC | Added | $1.3m93.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $740.0k53.5k shares |
| JANE STREET GROUP, LLC | Added | $728.5k52.6k shares |
| WOLVERINE TRADING, LLC | Added | $484.3k35.3k shares |
| Walleye Capital LLC | Added | $270.1k19.5k shares |
| GTS SECURITIES LLC | Added | $256.2k18.5k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.4% |
| FMR LLC 13G · institution +2.3 pts · filed 2026-08-06 | 5.4% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 5.0% |
Fell to 5% or below in the last year: WELLINGTON MANAGEMENT GROUP LLP (4.2%, 2026-08-13), Capital Research Global Investors (3.5%, 2026-05-14), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)
Insider purchases and sales in Q3 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2022 | 0 | — | 1 | $868.5k | — |
| Q1 2023 | 0 | — | 2 | $1.5m | — |
| Q2 2023 | 0 | — | 9 | $2.6m | $1.6m |
| Q3 2023 | 0 | — | 9 | $2.4m | $1.4m |
| Q4 2023 | 0 | — | 1 | $585.0k | $585.0k |
| Q1 2024 | 0 | — | 2 | $1.0m | $195.2k |
| Q2 2024 | 0 | — | 8 | $3.1m | $2.1m |
| Q3 2024 | 0 | — | 6 | $3.9m | $2.4m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-08-20 | Buckley Sean Patrick CHIEF REVENUE OFFICER | Sold plan | $35.4k2.6k shares |
| 2024-08-19 | Soroca Adam Lee CHIEF PRODUCT OFFICER | Sold plan | $99.6k7.9k shares |
| 2024-08-19 | Buckley Sean Patrick CHIEF REVENUE OFFICER | Sold plan | $32.9k2.6k shares |
| 2024-08-15 | BARRETT MICHAEL G. CEO, director | Sold plan | $947.3k75.0k shares |
| 2024-08-15 | Buonasera David CHIEF TECHNOLOGY OFFICER | Sold plan | $126.5k10.0k shares |
| 2024-07-16 | Buckley Sean Patrick CHIEF REVENUE OFFICER | Sold plan | $303.9k19.6k shares |
| 2024-07-15 | BARRETT MICHAEL G. CEO, director | Sold | $1.5m100.0k shares |
| 2024-07-15 | Day David CHIEF FINANCIAL OFFICER | Sold plan | $286.2k19.1k shares |
| 2024-07-15 | Buckley Sean Patrick CHIEF REVENUE OFFICER | Sold plan | $284.3k19.6k shares |
| 2024-07-15 | Gephart Brian CHIEF ACCOUNTING OFFICER | Sold plan | $242.5k16.2k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q3 2024
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.00% of their portfolio | 13.3m $184.9m | Added +383.8k |
| BlackRock, Inc. 0.00% of their portfolio | 9.8m $136.4m | First filing |
| WELLINGTON MANAGEMENT GROUP LLP 0.02% of their portfolio | 6.6m $91.1m | Added +3.7m |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 5.4m $74.2m | Reduced -39.6k |
| Nuveen Asset Management, LLC 0.02% of their portfolio | 4.1m $57.0m | Reduced -22.5k |
| Granahan Investment Management, LLC 2.18% of their portfolio | 4.0m $55.4m | Reduced -1.2m |
| FMR LLC 0.00% of their portfolio | 3.8m $52.1m | Reduced -1.7m |
| MARSHALL WACE, LLP 0.07% of their portfolio | 3.6m $50.5m | Added +2.1m |
| Edenbrook Capital, LLC 28.59% of their portfolio | 3.5m $48.4m | Reduced -1.1m |
| Boston Partners 0.05% of their portfolio | 3.4m $46.4m | Added +1.3m |
| Driehaus Capital Management LLC 0.41% of their portfolio | 3.4m $47.3m | Added +2.7m |
| STATE STREET CORP 0.00% of their portfolio | 3.1m $42.3m | Reduced -67.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 3.0m $41.1m | Added +63.5k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 2.9m $39.7m | Reduced -438.2k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 2.9m $39.5m | Reduced -100.2k |
| Nine Ten Capital Management LLC 10.97% of their portfolio | 2.6m $36.3m | Added +969.1k |
| NOMURA ASSET MANAGEMENT CO LTD 0.07% of their portfolio | 1.7m $23.9m | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.6m $22.7m | Added +23.0k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.47% of their portfolio | 1.5m $21.2m | Reduced -237.3k |
| ROYCE & ASSOCIATES LP 0.19% of their portfolio | 1.5m $20.6m | Added +73.6k |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC 2.30% of their portfolio | 1.3m $18.6m | New |
| VICTORY CAPITAL MANAGEMENT INC 0.02% of their portfolio | 1.3m $18.6m | Added +37.6k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.10% of their portfolio | 1.1m $14.9m | Reduced -6.1k |
| Penn Capital Management Company, LLC 1.33% of their portfolio | 1.0m $14.5m | Added +123.5k |
| Meros Investment Management, LP 6.53% of their portfolio | 1.0m $14.4m | Reduced -1.8k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 1.0m $14.3m | Added +26.7k |
| Nishkama Capital, LLC 2.14% of their portfolio | 1.0m $13.9m | New |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 982.0k $13.6m | Added +13.0k |
| Granite Investment Partners, LLC 0.55% of their portfolio | 927.9k $12.9m | Added +83.1k |
| HARBOR CAPITAL ADVISORS, INC. 0.55% of their portfolio | 921.5k $12.8m | Added +531.1k |
| GRIZZLYROCK CAPITAL, LLC 10.37% of their portfolio | 868.2k $12.0m | Added +65.0k |
| MORGAN STANLEY 0.00% of their portfolio | 860.6k $11.9m | Added +137.4k |
| NORDEA INVESTMENT MANAGEMENT AB 0.01% of their portfolio | 858.5k $12.1m | Reduced -45.1k |
| Squarepoint Ops LLC 0.04% of their portfolio | 850.5k $11.8m | Added +281.8k |
| JANE STREET GROUP, LLC 0.02% of their portfolio | 848.2k $11.7m | Added +588.1k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 839.2k $11.6m | Added +20.0k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 771.1k $10.7m | Added +17.1k |
| S SQUARED TECHNOLOGY, LLC 4.19% of their portfolio | 708.6k $9.8m | Added +214.1k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 702.5k $9.7m | Added +413.0k |
| Williams Jones Wealth Management, LLC. 0.11% of their portfolio | 674.5k $9.3m | Reduced -20.0k |
| J. Goldman & Co LP 0.41% of their portfolio | 673.7k $9.3m | New |
| Kopion Asset Management, LLC 6.49% of their portfolio | 650.4k $9.0m | Reduced -168.5k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.08% of their portfolio | 647.8k $9.0m | Reduced -4.9k |
| Qube Research & Technologies Ltd 0.02% of their portfolio | 641.2k $8.9m | Added +596.8k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 574.6k $8.0m | Added +80.5k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 558.7k $7.7m | Added +54.5k |
| KING LUTHER CAPITAL MANAGEMENT CORP 0.03% of their portfolio | 521.8k $7.2m | Reduced -5.8k |
| Dana Investment Advisors, Inc. 0.22% of their portfolio | 489.5k $6.8m | Reduced -3.8k |
| Balyasny Asset Management L.P. 0.02% of their portfolio | 469.1k $6.5m | Added +447.9k |
| Advantage Alpha Capital Partners LP 1.43% of their portfolio | 454.6k $6.3m | Reduced -27 |
| NORGES BANK 0.00% of their portfolio | 450.7k $6.2m | Reduced -121.7k |
| Manatuck Hill Partners, LLC 2.32% of their portfolio | 442.5k $6.1m | Unchanged |
| Assenagon Asset Management S.A. 0.01% of their portfolio | 409.3k $5.7m | Added +267.1k |
| Stephens Investment Management Group LLC 0.08% of their portfolio | 403.8k $5.6m | New |
| Parallax Volatility Advisers, L.P. 0.13% of their portfolio | 360.0k $5.0m | Reduced -181.3k |
| SCOUT INVESTMENTS, INC. 0.11% of their portfolio | 348.9k $4.3m | Reduced -56.5k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 344.0k $4.8m | Added +11.0k |
| TUDOR INVESTMENT CORP ET AL 0.05% of their portfolio | 335.4k $4.6m | Added +28.4k |
| 1492 Capital Management LLC 2.29% of their portfolio | 330.4k $4.6m | Added +8.8k |
| P.A.W. CAPITAL CORP 9.99% of their portfolio | 320.0k $4.4m | Reduced -30.0k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 292.4k $4.1m | Added +45.1k |
| GSA CAPITAL PARTNERS LLP 0.28% of their portfolio | 264.1k $3.7m | Reduced -25.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 261.8k $3.6m | New |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 261.4k $3.6m | Added +217.4k |
| Swiss National Bank 0.00% of their portfolio | 246.1k $3.4m | Reduced -1.6k |
| UBS Group AG 0.00% of their portfolio | 243.0k $3.4m | Added +13.5k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 233.1k $3.2m | Added +120.9k |
| CITIGROUP INC 0.00% of their portfolio | 230.0k $3.2m | Added +71.7k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 220.3k $3.1m | Reduced -83.2k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 211.3k $2.9m | Reduced -2.3k |
| BARCLAYS PLC 0.00% of their portfolio | 210.6k $2.9m | Added +164.1k |
| PANAGORA ASSET MANAGEMENT INC 0.01% of their portfolio | 206.4k $2.9m | Reduced -1.2k |
| Invesco Ltd. 0.00% of their portfolio | 201.3k $2.8m | Added +2.8k |
| OBERWEIS ASSET MANAGEMENT INC/ 0.14% of their portfolio | 200.0k $2.8m | Unchanged |
| Calamos Advisors LLC 0.01% of their portfolio | 191.0k $2.6m | Added +36.8k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 189.7k $2.6m | Reduced -12.6k |
| CLOUGH CAPITAL PARTNERS L P 0.25% of their portfolio | 173.5k $2.4m | Added +27.6k |
| Millrace Asset Group, Inc. 2.33% of their portfolio | 165.3k $2.3m | Reduced -48.4k |
| ALGERT GLOBAL LLC 0.06% of their portfolio | 159.1k $2.2m | Added +16.9k |
| Hilton Capital Management, LLC 0.17% of their portfolio | 155.9k $2.2m | Reduced -4.7k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 152.2k $2.1m | Added +118.5k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 149.2k $2.1m | Added +85.3k |
| Connor, Clark & Lunn Investment Management Ltd. 0.01% of their portfolio | 149.1k $2.1m | New |
| PERKINS CAPITAL MANAGEMENT INC 1.94% of their portfolio | 149.1k $2.1m | Unchanged |
| Concentric Capital Strategies, LP 0.13% of their portfolio | 147.2k $2.0m | New |
| Lisanti Capital Growth, LLC 0.51% of their portfolio | 146.4k $2.0m | Reduced -136.4k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.01% of their portfolio | 145.6k $2.0m | Added +135.0k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 144.6k $1.8m | Added +72.2k |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 144.5k $2.0m | Unchanged |
| BANK OF MONTREAL /CAN/ 0.00% of their portfolio | 138.4k $1.9m | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 136.6k $1.9m | Reduced -24 |
| Tidal Investments LLC 0.02% of their portfolio | 130.6k $1.8m | Added +23.7k |
| COMMONWEALTH EQUITY SERVICES, LLC 0.00% of their portfolio | 128.9k $1.8m | Added +47.3k |
| Legal & General Group Plc 0.00% of their portfolio | 128.0k $1.8m | Added +3.3k |
| WEDGE CAPITAL MANAGEMENT L L P/NC 0.03% of their portfolio | 123.1k $1.7m | Added +28.1k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 119.2k $1.7m | Reduced -3.6k |
| Advisory Services Network, LLC 0.03% of their portfolio | 117.3k $1.6m | Unchanged |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 107.5k $1.5m | Added +91.0k |
| GROUP ONE TRADING LLC 0.06% of their portfolio | 105.5k $1.5m | New |
| Cerity Partners LLC 0.00% of their portfolio | 103.4k $1.4m | Reduced -757 |