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Disclosery

MGNI MAGNITE INC

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Stock (common), issuer CIK 1595974

283 managers (288 13F filers) reported a position in MGNI shares at 2025-06-30, 146,964,499 shares in all. 50 filers opened a position and 57 filers sold out during the quarter.

Managers
283
13F filers
288
New
50
Added
100
Reduced
99
Sold out
57
Shares held by filers
146,964,499

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
FMR LLCin group FMR LLC17,185,939$415M0.02%+7,501,74113F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC13,562,285$327M0.01%-181,23613F-HRTimelineGroup
Capital Research Global Investorsin group Capital Research Global Inves…12,920,070$312M0.06%013F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.10,698,044$258M<0.01%+910,20413F-HRTimelineGroup
Boston Partnersin group Boston Trust Walden Corp5,574,604$133M0.15%+298,24813F-HR/ATimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…5,447,837$131M0.02%-455,43413F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP4,901,833$118M0.03%-379,81813F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC4,829,197$116M0.06%+1,868,18813F-HRTimelineGroup
Granahan Investment Management, LLC3,642,786$87.9M3.58%+992,79613F-HRTimeline
Edenbrook Capital, LLCin group Edenbrook Capital, LLC3,609,972$87.1M38.39%-406,70013F-HRTimelineGroup
Nuveen, LLCin group TIAA3,251,092$78.4M0.02%-345,41113F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC3,216,842$77.6M0.01%+183,41413F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP3,053,607$73.7M<0.01%+150,54713F-HRTimelineGroup
Nine Ten Capital Management LLC2,858,583$68.9M20.51%+123,75313F-HRTimeline
Driehaus Capital Management LLC2,782,178$67.1M0.54%+372,73913F-HRTimeline
UBS Group AGgroup of 2 filers holding2,276,495$54.9M+237,836Timeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,915,400$46.2M0.01%+988,60013F-HRTimelineGroup
Schonfeld Strategic Advisors LLC1,900,598$45.8M0.35%new13F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp1,798,240$43.4M0.01%+1,07813F-HRTimelineGroup
FRONTIER CAPITAL MANAGEMENT CO LLC1,793,830$43.3M0.4%+1,448,45613F-HRTimeline
NOMURA ASSET MANAGEMENT CO LTDin group NOMURA ASSET MANAGEMENT CO LTD1,740,741$42M0.12%-315,05213F-HRTimelineGroup
Maestria Partners LLC1,434,317$34.6M12.02%+382,00013F-HRTimeline
Stephens Investment Management Group LLCgroup of 2 filers holding1,433,047$34.6M+413,519Timeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP1,339,871$32.3M<0.01%-231,00613F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,170,555$28.2M<0.01%+294,69613F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,139,541$27.5M<0.01%+121,60213F-HRTimelineGroup
ROYCE & ASSOCIATES LP1,077,906$26M0.27%-104,90013F-HRTimeline
Apis Capital Advisors, LLC1,048,000$25.3M8.98%new13F-HRTimeline
GRIZZLYROCK CAPITAL, LLC974,323$23.5M17.67%+75,78213F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO938,088$22.6M<0.01%-50,70113F-HRTimelineGroup
KENNEDY CAPITAL MANAGEMENT LLC869,147$21M0.5%-54,76613F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC835,102$20.1M0.02%+242,17313F-HRTimelineGroup
SILVERCREST ASSET MANAGEMENT GROUP LLC804,247$19.4M0.13%-4,00013F-HRTimeline
Pacer Advisors, Inc.791,819$19.1M0.05%-310,33713F-HRTimeline
Penn Capital Management Company, LLC747,834$18.1M1.56%-166,85113F-HRTimeline
Meros Investment Management, LP702,142$16.9M8.04%-47,29613F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management699,932$16.9M0.04%new13F-HRTimelineGroup
HARBOR CAPITAL ADVISORS, INC.634,147$15.3M0.64%+42,83413F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…618,119$14.9M0.03%+122,46213F-HRTimelineGroup
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …614,317$14.8M0.03%+13,65213F-HRTimelineGroup
J. Goldman & Co LP603,683$14.6M0.46%new13F-HRTimeline
Verition Fund Management LLC595,495$14.4M0.08%-310,60413F-HRTimeline
Dana Investment Advisors, Inc.585,915$14.1M0.47%+25,59413F-HRTimeline
KING LUTHER CAPITAL MANAGEMENT CORP560,786$13.5M0.06%-22,00013F-HRTimeline
OBERWEIS ASSET MANAGEMENT INC/514,000$12.4M0.54%+308,30013F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND493,225$11.9M0.02%-162,91613F-HR/ATimeline
Norwood Investment Partners, LP462,000$11.1M8.35%new13F-HRTimeline
Kopion Asset Management, LLCin group Kopion Asset Management, LLC423,178$10.2M6.88%-175,82213F-HRTimelineGroup
Alta Park Capital, LP413,602$9.98M1.23%new13F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/413,425$9.97M<0.01%-500,00613F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC393,601$9.49M<0.01%+31,82513F-HRTimelineGroup
ARDSLEY ADVISORY PARTNERS LP370,000$8.92M1.46%+214,00013F-HRTimeline
Lisanti Capital Growth, LLC368,015$8.88M2.46%+224,16013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding364,532$8.79M-217,728Timeline
Advantage Alpha Capital Partners LP342,575$8.26M2.23%-84,58713F-HRTimeline
Dilation Capital Management LP334,725$8.07M4.3%new13F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …330,917$7.94M0.01%-571,85413F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…322,200$7.77M0.01%-125,88513F-HRTimelineGroup
1492 Capital Management LLC321,921$7.76M3.58%-3,88113F-HRTimeline
Manatuck Hill Partners, LLC308,491$7.44M2.8%+196,00013F-HRTimeline
S SQUARED TECHNOLOGY, LLC306,621$7.4M3.12%-45,00013F-HRTimeline
Blue Grotto Capital, LLC284,804$6.87M0.83%new13F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC284,290$6.86M0.01%+17,55413F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC274,193$6.61M<0.01%+102,89913F-HR/ATimelineGroup
Swiss National Bank272,600$6.58M<0.01%013F-HRTimeline
Roubaix Capital, LLC260,735$6.29M3.02%new13F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/242,346$5.85M<0.01%+1,40113F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC241,938$5.84M<0.01%+21,39413F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCgroup of 2 filers holding240,314$5.76M+30,180Timeline
CITIGROUP INCin group CITIGROUP INC238,492$5.75M<0.01%+84,92413F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP237,826$5.74M0.01%+184,27413F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.230,293$5.55M<0.01%+21,30213F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…225,281$5.43M0.02%-44,00513F-HRTimeline
RHUMBLINE ADVISERS223,426$5.39M<0.01%+30,92413F-HRTimeline
Informed Momentum Co LLC217,478$5.25M0.79%new13F-HRTimeline
EFG Asset Management (North America) Co…201,002$4.85M0.68%-35,50313F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC194,980$4.7M0.01%+28,97413F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD185,994$4.49M0.01%-47,68713F-HRTimeline
CLOUGH CAPITAL PARTNERS L Pin group CLOUGH CAPITAL PARTNERS L P185,277$4.47M0.45%new13F-HRTimelineGroup
Parallax Volatility Advisers, L.P.175,813$4.24M0.17%-93,17013F-HRTimeline
AYAL Capital Advisors Ltd165,937$4M2.18%new13F-HRTimeline
MOODY NATIONAL BANK TRUST DIVISIONin group MOODY NATIONAL BANK TRUST DIV…161,332$3.89M0.36%+57,14213F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc155,225$3.74M<0.01%+12,25913F-HRTimelineGroup
RICE HALL JAMES & ASSOCIATES, LLC154,897$3.74M0.2%-1,94213F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC153,551$3.7M0.36%+138,57313F-HRTimeline
CASTLEARK MANAGEMENT LLC143,150$3.45M0.1%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\141,801$3.42M<0.01%+10,13113F-HRTimelineGroup
COMERICA BANK141,617$3.42M0.01%+108,16613F-HRTimeline
ALLIANCEBERNSTEIN L.P.136,945$3.3M<0.01%+30013F-HRTimeline
PERKINS CAPITAL MANAGEMENT INC135,125$3.26M3.28%-10,00013F-HRTimeline
Hilton Capital Management, LLC133,566$3.22M0.26%-29,24613F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…132,575$3.2M<0.01%+2,51413F-HRTimeline
P.A.W. CAPITAL CORP130,000$3.14M6.04%-20,00013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT127,850$3.08M0.04%new13F-HRTimeline
CANNELL CAPITAL LLC126,578$3.05M0.95%new13F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/117,601$2.84M<0.01%+18,56013F-HRTimeline
Zweig-DiMenna Associates LLC111,500$2.69M0.28%new13F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN111,397$2.69M<0.01%+17,46813F-HRTimelineGroup
NORGES BANK108,716$2.62M<0.01%-110,58213F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources108,451$2.62M<0.01%-19,05913F-HRTimelineGroup
WEDGE CAPITAL MANAGEMENT L L P/NC107,634$2.6M0.05%-17,53213F-HRTimeline
GROUP ONE TRADING LLC107,089$2.58M0.08%+97,71913F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding107,077$2.58M-17,645Timeline
LPL Financial LLC106,547$2.57M<0.01%-15,80513F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC106,264$2.56M<0.01%-536,87913F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…102,904$2.48M0.01%013F-HR/ATimelineGroup
Cerity Partners LLCin group Cerity Partners LLC101,741$2.45M<0.01%+1,59113F-HRTimelineGroup
Tidal Investments LLCin group Tidal Investments LLC93,168$2.25M0.01%-36,10713F-HRTimelineGroup
CenterBook Partners LP92,266$2.23M0.12%-224,73813F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…83,541$2.02M0.01%+8,73613F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO82,116$1.98M<0.01%+42,35313F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP78,799$1.9M<0.01%+24,50413F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…76,760$1.85M<0.01%+1,91313F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC73,371$1.77M0.02%-36,62113F-HRTimeline
Legato Capital Management LLC70,480$1.7M0.2%+27,16013F-HRTimeline
GAMCO Investors (Gabelli)group of 2 filers holding70,403$1.7M-19,203Timeline
Panoramic Capital, LLC70,000$1.69M1.3%new13F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP69,499$1.68M<0.01%-254,41113F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …67,661$1.63M<0.01%-5,60213F-HRTimelineGroup
PINNACLE ASSOCIATES LTD67,020$1.62M0.02%+6,72513F-HRTimeline
PDT Partners, LLC63,448$1.53M0.09%new13F-HRTimeline
Advisory Services Network, LLC65,407$1.51M0.02%-18,30313F-HRTimeline
Weiss Asset Management LPin group Weiss Asset Management LP59,132$1.43M0.02%-395,99613F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
Ensign Peak Advisors, Inc58,508$1.41M<0.01%-1,00013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson58,423$1.41M<0.01%013F-HRTimelineGroup
SIMPLEX TRADING, LLC52,834$1.27M0.03%new13F-HRTimeline
Calamos Advisors LLCin group Calamos Advisors LLC52,710$1.27M0.01%-12,56513F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.51,271$1.24M<0.01%-50,61613F-HR/ATimelineGroup
Radcliffe Capital Management, L.P.50,000$1.21M0.09%013F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP49,304$1.19M0.05%-124,56013F-HRTimeline
Cardinal Point Capital Management ULC49,100$1.18M0.09%-4,70013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…48,871$1.18M<0.01%+4,88213F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA47,278$1.14M<0.01%-100,99013F-HR/ATimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC44,349$1.07M0.03%new13F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co43,505$1.05M<0.01%+4,90113F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC43,399$1.05M<0.01%-77,93313F-HRTimeline
STRS OHIO42,200$1.02M<0.01%-5,50013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM41,670$1.01M0.01%+1,34013F-HRTimeline
SG Americas Securities, LLC41,378$998K<0.01%+17,37313F-HRTimeline
GREENWOOD CAPITAL ASSOCIATES LLC40,175$969K0.12%-26,04613F-HRTimeline
Cetera Investment Advisers39,163$945K<0.01%+5,34213F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…38,231$922K<0.01%013F-HRTimeline
ExodusPoint Capital Management, LP35,727$862K0.01%new13F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …34,524$833K<0.01%-10,42313F-HRTimelineGroup
Bayesian Capital Management, LP33,800$815K0.13%new13F-HRTimeline
Diametric Capital, LP33,159$800K0.43%+21,91213F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.31,947$771K<0.01%new13F-HRTimelineGroup
Fulton Bank, N.A.31,935$770K0.03%-3,28013F-HRTimeline
Police & Firemen's Retirement System of…31,618$763K0.01%+4,88613F-HRTimeline
Handelsbanken Fonder AB30,100$726K<0.01%013F-HRTimeline
KLP KAPITALFORVALTNING AS29,100$702K<0.01%+4,50013F-HRTimeline
ProShare Advisors LLC28,718$693K<0.01%+1,48213F-HRTimeline
Penbrook Management LLC28,420$685K0.52%-9,75013F-HR/ATimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP28,313$683K<0.01%-7,32713F-HRTimelineGroup
PITCAIRN COin group PITCAIRN CO26,315$635K0.04%-10,81313F-HR/ATimelineGroup
Verdence Capital Advisors LLC26,196$632K0.04%+1,42613F-HRTimeline
Walleye Capital LLCgroup of 2 filers holding25,968$626K+18,748Timeline
Clear Creek Financial Management, LLC24,463$590K0.06%new13F-HRTimeline
Cambridge Investment Research Advisors,…23,358$563K<0.01%-28,45713F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…22,641$546K<0.01%013F-HRTimelineGroup
ARS Investment Partners, LLC22,500$543K0.04%new13F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS21,603$521K<0.01%+1,16413F-HRTimeline
Evanson Asset Management, LLC21,171$511K0.03%013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC20,960$506K<0.01%+6,78513F-HRTimelineGroup
Outlook Wealth Advisors, LLC20,474$494K0.13%013F-HRTimeline
JOHNSON INVESTMENT COUNSEL INC20,208$487K<0.01%+5,29913F-HRTimeline
GRIFFIN ASSET MANAGEMENT, INC.19,935$481K0.06%-10,82013F-HRTimeline
Ledgewood Wealth Advisors, LLC19,795$477K0.3%013F-HRTimeline
Quantinno Capital Management LP19,511$471K<0.01%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS18,554$448K<0.01%+4,30913F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC18,040$437K<0.01%-4,63313F-HRTimelineGroup
ELEVATION POINT WEALTH PARTNERS, LLC18,001$434K0.03%-4,45313F-HR/ATimeline
Vident Advisory, LLCin group Vident Advisory, LLC17,846$430K<0.01%-3,14313F-HRTimelineGroup
CIBC WORLD MARKETS CORP17,256$416K<0.01%-10,66213F-HRTimeline
Centiva Capital, LP17,000$410K0.03%013F-HRTimeline
M&T Bank Corpin group M&T Bank Corp16,595$401K<0.01%-2,36513F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS16,585$400K<0.01%+1,83813F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…15,065$363K0.01%+11,94313F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…14,986$361K<0.01%013F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC17,959$356K<0.01%new13F-HRTimelineGroup
WOODMONT INVESTMENT COUNSEL LLC14,300$345K0.02%-1,00013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…14,299$345K0.01%+1,13713F-HRTimelineGroup
1858 WEALTH MANAGEMENT, LLC14,070$339K0.25%+1,46513F-HRTimeline
Winthrop Advisory Group LLC14,000$338K0.03%+60013F-HRTimeline
Amundiin group Amundi13,655$337K<0.01%+1,36413F-HRTimelineGroup
HighTower Advisors, LLC13,827$334K<0.01%-28,44413F-HRTimeline
HCR Wealth Advisors13,000$314K0.04%013F-HRTimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC12,729$306K<0.01%-1,45313F-HRTimelineGroup
WOLVERINE TRADING, LLC14,275$301K0.01%-24,44013F-HRTimeline
AlphaQuest LLC12,447$300K0.03%-6,63013F-HRTimeline
FDx Advisors, Inc.12,375$298K0.09%+2,26513F-HRTimeline
MML INVESTORS SERVICES, LLC12,124$292K<0.01%-9,37813F-HRTimeline
TWO SIGMA SECURITIES, LLC12,070$291K0.04%-12,58513F-HRTimeline
Parkside Financial Bank & Trust11,973$289K0.03%+28313F-HRTimeline
BLACKHILL CAPITAL INC11,622$280K0.02%013F-HRTimeline
Prudent Man Advisors, LLC11,360$274K0.09%new13F-HRTimeline
1620 INVESTMENT ADVISORS, INC.11,234$271K0.19%+4,23013F-HRTimeline
Creative Planningin group Creative Planning11,131$268K<0.01%-6,58713F-HRTimelineGroup
Massar Capital Management, LP11,000$265K0.2%-21,14413F-HR/ATimeline
Cornerstone Wealth Management, LLC10,920$263K0.02%013F-HRTimeline