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 ($598.9k this quarter). Holder counts are more reliable. Shares outstanding: 141.1m as of 2024-07-31, 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 ≈ $13.29. Options: 17 managers hold calls ($38.5m notional), 14 hold puts ($36.5m).
Trends to Q2 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 |
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 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2023 | $20.0m | $22.3m | 1.11 |
| Q4 2023 | $16.3m | $25.7m | 1.58 |
| Q1 2024 | $20.2m | $26.9m | 1.34 |
| Q2 2024 | $38.5m | $36.5m | 0.95 |
Biggest buyers
| Boston Partners | New | +2.1m |
| Nuveen Asset Management, LLC | Added | +888.1k |
| Granite Investment Partners, LLC | New | +844.8k |
| Driehaus Capital Management LLC | New | +747.8k |
| AMERIPRISE FINANCIAL INC | Added | +583.1k |
| MARSHALL WACE, LLP | Added | +578.7k |
| JPMORGAN CHASE & CO | Added | +553.4k |
| Dana Investment Advisors, Inc. | New | +493.3k |
| Verition Fund Management LLC | New | +470.4k |
| Squarepoint Ops LLC | Added | +426.1k |
Biggest sellers
| Burgundy Asset Management Ltd. | Sold out | -2.5m |
| Nine Ten Capital Management LLC | Reduced | -2.1m |
| FMR LLC | Reduced | -2.0m |
| MORGAN STANLEY | Reduced | -1.8m |
| Edenbrook Capital, LLC | Reduced | -1.2m |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | -640.7k |
| ROYCE & ASSOCIATES LP | Reduced | -260.3k |
| GOLDMAN SACHS GROUP INC | Reduced | -228.9k |
| Granahan Investment Management, LLC | Reduced | -207.9k |
| NORGES BANK | Reduced | -207.3k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $7.8m584.6k shares |
| GTS SECURITIES LLC | Added | $4.5m338.7k shares |
| JANE STREET GROUP, LLC | Added | $4.1m305.2k shares |
| CITADEL ADVISORS LLC | Added | $3.5m264.3k shares |
| PEAK6 Investments LLC | Added | $3.1m231.3k shares |
| SIMPLEX TRADING, LLC | Added | $2.7m206.4k shares |
| GROUP ONE TRADING LLC | Added | $2.7m203.9k shares |
| IMC-Chicago, LLC | Added | $2.2m166.7k shares |
| Squarepoint Ops LLC | Reduced | $2.1m158.8k shares |
| Edenbrook Capital, LLC | New | $2.0m150.0k shares |
Biggest puts
| Parallax Volatility Advisers, L.P. | Unchanged | $23.7m1.8m shares |
| Squarepoint Ops LLC | Added | $5.1m383.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.4m181.4k shares |
| SIMPLEX TRADING, LLC | Added | $1.3m100.5k shares |
| IMC-Chicago, LLC | Added | $1.1m85.3k shares |
| CITADEL ADVISORS LLC | Added | $984.8k74.1k shares |
| JANE STREET GROUP, LLC | New | $455.8k34.3k shares |
| WOLVERINE TRADING, LLC | New | $346.9k26.1k shares |
| PEAK6 Investments LLC | Reduced | $292.4k22.0k shares |
| Walleye Trading LLC | Reduced | $237.9k17.9k 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 Q2 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 |
|---|---|---|---|---|---|
| Q3 2022 | 0 | — | 0 | — | — |
| 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 |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-06-14 | Saltz Aaron CHIEF LEGAL OFFICER | Sold plan | $65.2k4.8k shares |
| 2024-06-13 | Evans Katie Seitz CHIEF OPERATING OFFICER | Sold plan | $200.2k14.5k shares |
| 2024-06-12 | Day David CHIEF FINANCIAL OFFICER | Sold plan | $298.4k21.3k shares |
| 2024-06-11 | Spillane Robert F Director | Sold | $326.0k25.0k shares |
| 2024-06-05 | Buckley Sean Patrick CHIEF REVENUE OFFICER | Sold plan | $292.3k21.7k shares |
| 2024-06-03 | Day David CHIEF FINANCIAL OFFICER | Sold plan | $269.5k20.7k shares |
| 2024-05-24 | Buckley Sean Patrick CHIEF REVENUE OFFICER | Sold plan | $33.5k2.7k shares |
| 2024-05-17 | Soroca Adam Lee CHIEF PRODUCT OFFICER | Sold plan | $130.3k10.6k shares |
| 2024-05-16 | Soroca Adam Lee CHIEF PRODUCT OFFICER | Sold plan | $281.4k23.5k shares |
| 2024-05-16 | Day David CHIEF FINANCIAL OFFICER | Sold plan | $232.4k19.4k shares |
| 2024-05-16 | Buckley Sean Patrick CHIEF REVENUE OFFICER | Sold plan | $211.6k16.9k shares |
| 2024-05-16 | Buonasera David CHIEF TECHNOLOGY OFFICER | Sold plan | $68.8k5.5k shares |
| 2024-05-15 | BARRETT MICHAEL G. CEO, director | Sold | $676.5k75.0k 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, Q2 2024
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.00% of their portfolio | 13.0m $172.3m | Added +146.1k |
| BlackRock Inc. 0.00% of their portfolio | 9.7m $128.9m | Reduced -80.5k |
| FMR LLC 0.00% of their portfolio | 5.5m $73.2m | Reduced -2.0m |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 5.4m $71.7m | Reduced -54.8k |
| Granahan Investment Management, LLC 2.78% of their portfolio | 5.2m $69.5m | Reduced -207.9k |
| Edenbrook Capital, LLC 33.96% of their portfolio | 4.6m $61.1m | Reduced -1.2m |
| Nuveen Asset Management, LLC 0.02% of their portfolio | 4.1m $55.0m | Added +888.1k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 3.3m $43.9m | Added +147.2k |
| STATE STREET CORP 0.00% of their portfolio | 3.1m $41.5m | Added +76.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 3.0m $39.3m | Added +553.4k |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 2.9m $38.8m | Added +114.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 2.9m $38.6m | Reduced -23.3k |
| Boston Partners 0.04% of their portfolio | 2.1m $28.3m | New |
| KENNEDY CAPITAL MANAGEMENT LLC 0.50% of their portfolio | 1.8m $23.5m | Added +206.2k |
| Nine Ten Capital Management LLC 8.45% of their portfolio | 1.7m $22.0m | Reduced -2.1m |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.6m $21.5m | Added +276.5k |
| MARSHALL WACE, LLP 0.03% of their portfolio | 1.6m $20.7m | Added +578.7k |
| ROYCE & ASSOCIATES LP 0.18% of their portfolio | 1.4m $18.8m | Reduced -260.3k |
| VICTORY CAPITAL MANAGEMENT INC 0.02% of their portfolio | 1.3m $17.3m | Reduced -640.7k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.10% of their portfolio | 1.1m $14.4m | Added +227.5k |
| Meros Investment Management, LP 6.56% of their portfolio | 1.0m $13.9m | Added +13.6k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 1.0m $13.4m | Added +623 |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 969.0k $12.9m | Reduced -228.9k |
| Penn Capital Management Company, LLC 1.16% of their portfolio | 920.8k $12.3m | Reduced -83.6k |
| NORDEA INVESTMENT MANAGEMENT AB 0.01% of their portfolio | 903.6k $11.7m | Reduced -85.9k |
| Granite Investment Partners, LLC 0.46% of their portfolio | 844.8k $11.2m | New |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 819.3k $10.9m | Added +583.1k |
| Kopion Asset Management, LLC 7.72% of their portfolio | 819.0k $10.9m | Reduced -205.4k |
| GRIZZLYROCK CAPITAL, LLC 8.87% of their portfolio | 803.2k $10.7m | Added +117.8k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 754.1k $10.0m | Reduced -30.9k |
| Driehaus Capital Management LLC 0.10% of their portfolio | 747.8k $9.9m | New |
| MORGAN STANLEY 0.00% of their portfolio | 723.3k $9.6m | Reduced -1.8m |
| Williams Jones Wealth Management, LLC. 0.11% of their portfolio | 694.6k $9.2m | Reduced -54.0k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.09% of their portfolio | 652.7k $8.7m | Reduced -7.5k |
| NORGES BANK 0.00% of their portfolio | 572.4k $7.6m | Reduced -207.3k |
| Squarepoint Ops LLC 0.03% of their portfolio | 568.7k $7.6m | Added +426.1k |
| Parallax Volatility Advisers, L.P. 0.18% of their portfolio | 541.3k $7.2m | Reduced -205.6k |
| KING LUTHER CAPITAL MANAGEMENT CORP 0.03% of their portfolio | 527.6k $7.0m | Added +8.9k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 504.3k $6.7m | Added +147.5k |
| S SQUARED TECHNOLOGY, LLC 2.90% of their portfolio | 494.5k $6.6m | Unchanged |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 494.0k $6.6m | Added +353.8k |
| Dana Investment Advisors, Inc. 0.22% of their portfolio | 493.3k $6.6m | New |
| Verition Fund Management LLC 0.05% of their portfolio | 470.4k $6.3m | New |
| Advantage Alpha Capital Partners LP 1.32% of their portfolio | 454.6k $6.0m | Added +217.4k |
| Manatuck Hill Partners, LLC 2.59% of their portfolio | 442.5k $5.9m | Added +330.0k |
| SCOUT INVESTMENTS, INC. 0.14% of their portfolio | 405.4k $5.4m | Reduced -38.9k |
| HARBOR CAPITAL ADVISORS, INC. 0.40% of their portfolio | 390.5k $5.2m | Added +284.2k |
| Roumell Asset Management, LLC 9.67% of their portfolio | 387.8k $5.2m | Added +120.0k |
| iA Global Asset Management Inc. 0.09% of their portfolio | 353.5k $4.7m | New |
| P.A.W. CAPITAL CORP 11.47% of their portfolio | 350.0k $4.7m | Reduced -130.0k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 333.0k $4.4m | Added +166.1k |
| 1492 Capital Management LLC 2.42% of their portfolio | 321.7k $4.3m | Added +90.5k |
| TUDOR INVESTMENT CORP ET AL 0.05% of their portfolio | 307.1k $4.1m | Reduced -185.2k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 303.5k $4.0m | Added +204.6k |
| GSA CAPITAL PARTNERS LLP 0.27% of their portfolio | 289.6k $3.8m | Reduced -49.7k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 289.5k $3.8m | Reduced -127.3k |
| Lisanti Capital Growth, LLC 0.90% of their portfolio | 282.8k $3.8m | Reduced -2.1k |
| Divisadero Street Capital Management, LP 0.60% of their portfolio | 275.9k $3.7m | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 260.1k $3.5m | Added +200.7k |
| Swiss National Bank 0.00% of their portfolio | 247.7k $3.3m | Added +2.8k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 247.3k $3.3m | Added +32.3k |
| UBS Group AG 0.00% of their portfolio | 229.5k $3.1m | Added +74.1k |
| Millrace Asset Group, Inc. 2.76% of their portfolio | 213.7k $2.8m | Added +109.2k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 213.6k $2.8m | Added +195.3k |
| PANAGORA ASSET MANAGEMENT INC 0.01% of their portfolio | 207.5k $2.8m | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 202.3k $2.7m | Reduced -14.6k |
| OBERWEIS ASSET MANAGEMENT INC/ 0.16% of their portfolio | 200.0k $2.7m | New |
| Invesco Ltd. 0.00% of their portfolio | 198.5k $2.6m | Added +5.5k |
| Hilton Capital Management, LLC 0.18% of their portfolio | 160.7k $2.1m | Added +34.0k |
| CITIGROUP INC 0.00% of their portfolio | 158.3k $2.1m | Added +10.9k |
| Calamos Advisors LLC 0.01% of their portfolio | 154.1k $2.0m | New |
| PERKINS CAPITAL MANAGEMENT INC 1.87% of their portfolio | 149.1k $2.0m | Added +20.8k |
| CLOUGH CAPITAL PARTNERS L P 0.21% of their portfolio | 145.9k $1.9m | New |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 144.5k $1.9m | New |
| Assenagon Asset Management S.A. 0.00% of their portfolio | 142.3k $1.9m | Added +119.2k |
| ALGERT GLOBAL LLC 0.06% of their portfolio | 142.2k $1.9m | Added +8.8k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 139.1k $1.8m | Added +85.9k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.04% of their portfolio | 136.9k $1.8m | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 136.7k $1.8m | Reduced -2.8k |
| G2 Investment Partners Management LLC 0.46% of their portfolio | 133.5k $1.8m | New |
| ARDSLEY ADVISORY PARTNERS LP 0.32% of their portfolio | 132.9k $1.8m | Added +41.0k |
| Legal & General Group Plc 0.00% of their portfolio | 124.8k $1.7m | Added +1.5k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 122.8k $1.6m | Reduced -2.4k |
| Jackson Creek Investment Advisors LLC 0.59% of their portfolio | 120.8k $1.6m | New |
| Advisory Services Network, LLC 0.03% of their portfolio | 117.3k $1.6m | Reduced -12.4k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 112.1k $1.5m | Reduced -16.8k |
| Tidal Investments LLC 0.02% of their portfolio | 106.9k $1.4m | Added +37.5k |
| Cerity Partners LLC 0.00% of their portfolio | 104.1k $1.4m | Added +529 |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 100.6k $1.3m | Reduced -4.7k |
| WEDGE CAPITAL MANAGEMENT L L P/NC 0.02% of their portfolio | 95.0k $1.3m | Reduced -9.2k |
| HighTower Advisors, LLC 0.00% of their portfolio | 87.7k $1.2m | Reduced -2.1k |
| IMC-Chicago, LLC 0.04% of their portfolio | 86.0k $1.1m | Added +58.7k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 84.6k $1.1m | Added +1.2k |
| Raymond James Financial Services Advisors, Inc. 0.00% of their portfolio | 83.4k $1.1m | Added +9.3k |
| COMMONWEALTH EQUITY SERVICES, LLC 0.00% of their portfolio | 81.6k $1.1m | Added +71.0k |
| MOODY NATIONAL BANK TRUST DIVISION 0.08% of their portfolio | 75.4k $1.0m | Added +1.8k |
| MetLife Investment Management, LLC 0.01% of their portfolio | 74.4k $989.2k | Added +7.4k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 72.4k $962.1k | Added +10.0k |
| STEPHENS INC /AR/ 0.01% of their portfolio | 69.5k $923.8k | Reduced -825 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 68.3k $908.2k | First filing |