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 ($2.1m this quarter). Holder counts are more reliable. Shares outstanding: 137.0m as of 2023-08-02, 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 ≈ $13.63. Options: 11 managers hold calls ($33.6m notional), 10 hold puts ($42.8m).
Trends to Q2 2023
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 218 |
| Q4 2022 | 230 |
| Q1 2023 | 223 |
| Q2 2023 | 225 |
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 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2022 | $11.9m | $24.7m | 2.08 |
| Q4 2022 | $21.1m | $47.2m | 2.24 |
| Q1 2023 | $20.0m | $35.8m | 1.79 |
| Q2 2023 | $33.6m | $42.8m | 1.27 |
Biggest buyers
| Rubric Capital Management LP | New | +2.2m |
| Driehaus Capital Management LLC | Added | +1.5m |
| KENNEDY CAPITAL MANAGEMENT LLC | Added | +994.8k |
| G2 Investment Partners Management LLC | New | +756.0k |
| DIMENSIONAL FUND ADVISORS LP | Added | +716.5k |
| Engle Capital Management, L.P. | New | +622.0k |
| Lisanti Capital Growth, LLC | New | +601.4k |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +487.7k |
| JPMORGAN CHASE & CO | Added | +378.0k |
| OBERWEIS ASSET MANAGEMENT INC/ | New | +340.7k |
Biggest sellers
| FMR LLC | Reduced | -6.3m |
| Granahan Investment Management, LLC | Reduced | -1.6m |
| Edenbrook Capital, LLC | Reduced | -941.1k |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Reduced | -887.5k |
| CITADEL ADVISORS LLC | Reduced | -574.6k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -421.3k |
| Parallax Volatility Advisers, L.P. | Reduced | -386.3k |
| Invesco Ltd. | Reduced | -360.8k |
| Bank of New York Mellon Corp | Reduced | -325.2k |
| Kopion Asset Management, LLC | Reduced | -263.2k |
Biggest calls
| GROUP ONE TRADING LLC | Added | $6.8m500.4k shares |
| Parallax Volatility Advisers, L.P. | Reduced | $6.8m500.1k shares |
| CITADEL ADVISORS LLC | Added | $6.2m454.2k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.2m452.4k shares |
| PEAK6 Investments LLC | Added | $2.4m177.0k shares |
| Walleye Trading LLC | Added | $2.1m156.1k shares |
| SIMPLEX TRADING, LLC | Added | $1.9m140.8k shares |
| JANE STREET GROUP, LLC | Reduced | $881.8k64.6k shares |
| HSBC HOLDINGS PLC | Unchanged | $203.4k15.0k shares |
| Cutler Group LLC / CA | Reduced | $1.0k5.2k shares |
Biggest puts
| Parallax Volatility Advisers, L.P. | Reduced | $39.0m2.9m shares |
| CITADEL ADVISORS LLC | Reduced | $1.2m90.5k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $954.1k69.9k shares |
| Walleye Trading LLC | Reduced | $682.5k50.0k shares |
| GROUP ONE TRADING LLC | Reduced | $334.4k24.5k shares |
| SIMPLEX TRADING, LLC | Reduced | $238.0k17.5k shares |
| JANE STREET GROUP, LLC | Reduced | $217.0k15.9k shares |
| PEAK6 Investments LLC | Reduced | $176.1k12.9k shares |
| WOLVERINE ASSET MANAGEMENT LLC | Unchanged | $1.4k100 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 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 2023
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 2021 | 0 | — | 0 | — | — |
| Q4 2021 | 1 | $40.4k | 1 | $450.1k | — |
| Q1 2022 | 1 | $32.0k | 1 | $141.3k | — |
| Q2 2022 | 1 | $22.5k | 1 | $207.5k | — |
| Q3 2022 | 0 | — | 0 | — | — |
| Q4 2022 | 0 | — | 1 | $868.5k | — |
| Q1 2023 | 0 | — | 2 | $1.5m | — |
| Q2 2023 | 0 | — | 9 | $2.6m | $1.6m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2023-06-29 | Day David Chief Financial Officer | Sold plan | $301.9k21.6k shares |
| 2023-06-13 | Day David Chief Financial Officer | Sold plan | $205.2k15.3k shares |
| 2023-06-12 | Evans Katie Seitz Chief Operating Officer | Sold plan | $149.0k11.1k shares |
| 2023-06-12 | Day David Chief Financial Officer | Sold plan | $16.3k1.2k shares |
| 2023-06-08 | TROE LISA L Director | Sold plan | $75.8k5.8k shares |
| 2023-06-02 | Buckley Sean Patrick Chief Revenue Officer | Sold | $158.7k12.2k shares |
| 2023-05-31 | BARRETT MICHAEL G. CEO, director | Sold plan | $876.8k75.0k shares |
| 2023-05-16 | BARRETT MICHAEL G. CEO, director | Sold | $268.5k24.7k shares |
| 2023-05-16 | Day David Chief Financial Officer | Sold | $174.8k16.1k shares |
| 2023-05-16 | Soroca Adam Lee Chief Product Officer | Sold | $134.8k12.4k shares |
| 2023-05-16 | Evans Katie Seitz Chief Operating Officer | Sold | $81.1k7.5k shares |
| 2023-05-16 | Buckley Sean Patrick Chief Revenue Officer | Sold | $61.4k5.6k shares |
| 2023-05-16 | Saltz Aaron Chief Legal Officer | Sold | $41.4k3.8k shares |
| 2023-05-16 | Buonasera David Chief Technology Officer | Sold | $17.0k1.6k shares |
| 2023-05-16 | Gephart Brian Chief Accounting Officer | Sold | $13.5k1.2k 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, Q2 2023
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.00% of their portfolio | 12.4m $169.6m | Reduced -38.1k |
| BlackRock Inc. 0.00% of their portfolio | 9.1m $123.8m | Added +218.1k |
| Granahan Investment Management, LLC 3.17% of their portfolio | 7.6m $103.1m | Reduced -1.6m |
| FMR LLC 0.01% of their portfolio | 7.3m $99.9m | Reduced -6.3m |
| Edenbrook Capital, LLC 24.66% of their portfolio | 6.0m $81.2m | Reduced -941.1k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 4.9m $67.4m | Added +716.5k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 3.5m $47.6m | Reduced -325.2k |
| STATE STREET CORP 0.00% of their portfolio | 2.8m $37.7m | Added +28.7k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.83% of their portfolio | 2.6m $35.7m | Added +994.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 2.6m $35.0m | Added +99.6k |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 2.4m $33.0m | Added +97.1k |
| Rubric Capital Management LP 1.29% of their portfolio | 2.2m $30.2m | New |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 2.1m $28.6m | Added +487.7k |
| VICTORY CAPITAL MANAGEMENT INC 0.03% of their portfolio | 2.0m $27.7m | Added +308.0k |
| Driehaus Capital Management LLC 0.34% of their portfolio | 2.0m $27.3m | Added +1.5m |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.23% of their portfolio | 1.8m $24.4m | Reduced -887.5k |
| ROYCE & ASSOCIATES LP 0.20% of their portfolio | 1.5m $20.8m | Reduced -7.0k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.3m $18.4m | Added +114.5k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 1.1m $15.3m | Added +378.0k |
| NORGES BANK 0.00% of their portfolio | 1.0m $13.9m | Reduced -81.1k |
| NORDEA INVESTMENT MANAGEMENT AB 0.02% of their portfolio | 1.0m $14.1m | Reduced -31.9k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.02% of their portfolio | 940.7k $12.8m | Added +235.8k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 924.7k $12.6m | Added +17.6k |
| Williams Jones Wealth Management, LLC. 0.19% of their portfolio | 918.2k $12.5m | Added +98.2k |
| Penn Capital Management Company, LLC 1.22% of their portfolio | 918.1k $12.5m | Added +100.1k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.08% of their portfolio | 823.0k $11.2m | Added +120.7k |
| Parallax Volatility Advisers, L.P. 0.37% of their portfolio | 789.8k $10.8m | Reduced -386.3k |
| G2 Investment Partners Management LLC 2.53% of their portfolio | 756.0k $10.3m | New |
| Meros Investment Management, LP 4.86% of their portfolio | 717.7k $9.8m | Added +94.4k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 647.3k $6.0m | Unchanged |
| CANNELL CAPITAL LLC 1.76% of their portfolio | 646.4k $8.8m | Added +139.6k |
| Engle Capital Management, L.P. 2.63% of their portfolio | 622.0k $8.5m | New |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 608.8k $8.3m | Reduced -139.2k |
| Kopion Asset Management, LLC 6.97% of their portfolio | 603.2k $8.2m | Reduced -263.2k |
| Lisanti Capital Growth, LLC 1.14% of their portfolio | 601.4k $8.2m | New |
| MORGAN STANLEY 0.00% of their portfolio | 591.9k $8.1m | Added +42.7k |
| S SQUARED TECHNOLOGY, LLC 3.65% of their portfolio | 540.7k $7.4m | Added +6.7k |
| KING LUTHER CAPITAL MANAGEMENT CORP 0.03% of their portfolio | 509.3k $7.0m | Added +7.0k |
| SCOUT INVESTMENTS, INC. 0.15% of their portfolio | 493.9k $7.2m | Reduced -14.7k |
| TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio | 409.8k $5.6m | Added +217.6k |
| CASTLEARK MANAGEMENT LLC 0.25% of their portfolio | 409.8k $5.6m | Added +132.0k |
| First Eagle Investment Management, LLC 0.01% of their portfolio | 407.8k $5.6m | Added +147.5k |
| P.A.W. CAPITAL CORP 11.21% of their portfolio | 400.0k $5.5m | Reduced -40.0k |
| iA Global Asset Management Inc. 0.13% of their portfolio | 356.7k $4.9m | First filing |
| OBERWEIS ASSET MANAGEMENT INC/ 0.57% of their portfolio | 340.7k $4.7m | New |
| Madison Asset Management, LLC 0.07% of their portfolio | 338.9k $4.6m | Added +648 |
| Millrace Asset Group, Inc. 4.28% of their portfolio | 299.6k $4.1m | Added +190.8k |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 296.8k $4.1m | Reduced -421.3k |
| Swiss National Bank 0.00% of their portfolio | 294.0k $4.0m | Added +34.9k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 290.2k $4.0m | Reduced -574.6k |
| FRED ALGER MANAGEMENT, LLC 0.02% of their portfolio | 272.7k $3.7m | Reduced -6.6k |
| TWO SIGMA ADVISERS, LP 0.01% of their portfolio | 268.2k $3.7m | Reduced -55.9k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 266.1k $3.6m | Reduced -2.3k |
| Squarepoint Ops LLC 0.02% of their portfolio | 261.3k $3.6m | New |
| CREDIT SUISSE AG/ 0.00% of their portfolio | 236.9k $3.2m | Added +130.0k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 219.9k $3.0m | Reduced -15.4k |
| PRELUDE CAPITAL MANAGEMENT, LLC 0.24% of their portfolio | 214.3k $2.9m | Added +22.9k |
| CITIGROUP INC 0.00% of their portfolio | 202.2k $2.8m | Reduced -66.4k |
| State of New Jersey Common Pension Fund D 0.01% of their portfolio | 201.7k $2.8m | Added +30.3k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 187.5k $2.6m | Reduced -176.7k |
| WOODMONT INVESTMENT COUNSEL LLC 0.25% of their portfolio | 178.2k $2.4m | Added +5.4k |
| Lapides Asset Management, LLC 1.54% of their portfolio | 172.4k $2.4m | Added +21.7k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 171.4k $2.3m | New |
| Manatuck Hill Partners, LLC 1.06% of their portfolio | 163.5k $2.2m | Unchanged |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 163.4k $2.2m | Added +8.7k |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.01% of their portfolio | 151.0k $2.1m | Reduced -665 |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 143.6k $2.0m | Added +90.5k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 139.1k $1.9m | Reduced -12.6k |
| PERKINS CAPITAL MANAGEMENT INC 1.59% of their portfolio | 133.3k $1.8m | Unchanged |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 133.0k $1.8m | Added +26.2k |
| Invesco Ltd. 0.00% of their portfolio | 132.5k $1.8m | Reduced -360.8k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 130.3k $1.8m | Unchanged |
| Legal & General Group Plc 0.00% of their portfolio | 120.6k $1.6m | Added +7.1k |
| STEPHENS INC /AR/ 0.03% of their portfolio | 119.7k $1.6m | Reduced -75.1k |
| Advisory Services Network, LLC 0.04% of their portfolio | 113.9k $1.6m | Reduced -148 |
| UBS Group AG 0.00% of their portfolio | 108.9k $1.5m | Added +26.5k |
| HighTower Advisors, LLC 0.00% of their portfolio | 102.3k $1.4m | Reduced -8.4k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 101.8k $1.4m | Reduced -95.0k |
| AJ WEALTH STRATEGIES, LLC 0.07% of their portfolio | 100.0k $1.4m | Unchanged |
| BOOTHBAY FUND MANAGEMENT, LLC 0.04% of their portfolio | 86.2k $1.2m | New |
| GRIFFIN ASSET MANAGEMENT, INC. 0.16% of their portfolio | 84.5k $1.2m | Unchanged |
| 1492 Capital Management LLC 0.63% of their portfolio | 79.0k $1.1m | New |
| ClariVest Asset Management LLC 0.05% of their portfolio | 75.9k $1.0m | Reduced -5.8k |
| MOODY NATIONAL BANK TRUST DIVISION 0.07% of their portfolio | 72.6k $991.3k | Reduced -7.3k |
| Quantbot Technologies LP 0.06% of their portfolio | 72.2k $985.7k | Reduced -5.0k |
| MetLife Investment Management, LLC 0.01% of their portfolio | 70.7k $964.7k | Added +983 |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 70.0k $955.4k | Added +32.4k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 69.8k $952.8k | Added +24.9k |
| GREENWOOD CAPITAL ASSOCIATES LLC 0.13% of their portfolio | 68.1k $930.0k | Reduced -1.3k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 67.1k $917.0k | Added +5.4k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 64.7k $883.7k | New |
| AMERICAN INTERNATIONAL GROUP, INC. 0.01% of their portfolio | 64.5k $880.1k | Added +600 |
| Knights of Columbus Asset Advisors LLC 0.08% of their portfolio | 63.2k $862.2k | Unchanged |
| Ensign Peak Advisors, Inc 0.00% of their portfolio | 62.5k $853.3k | Unchanged |
| Alpha DNA Investment Management LLC 0.47% of their portfolio | 60.9k $831.6k | New |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 59.1k $806.4k | Reduced -132 |
| Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio | 58.2k $794.0k | Unchanged |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 53.7k $732.9k | Added +838 |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 52.9k $721.8k | Added +2.5k |
| Legato Capital Management LLC 0.09% of their portfolio | 51.2k $699.6k | Added +39.0k |