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Disclosery

MGNI MAGNITE INC

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Stock (common), issuer CIK 1595974

290 managers (295 13F filers) reported a position in MGNI shares at 2025-03-31, 132,905,130 shares in all. 50 filers opened a position and 39 filers sold out during the quarter.

Managers
290
13F filers
295
New
50
Added
104
Reduced
99
Sold out
39
Shares held by filers
132,905,130

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, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, 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
VANGUARD GROUP INCin group VANGUARD GROUP INC13,743,521$157M<0.01%+138,41713F-HRTimelineGroup
Capital Research Global Investorsin group Capital Research Global Inves…12,920,070$147M0.03%+5,194,83513F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.9,787,840$112M<0.01%-379,40313F-HRTimelineGroup
FMR LLCin group FMR LLC9,684,198$110M0.01%+8,069,42113F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…5,903,271$67.4M0.01%-1,126,74013F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP5,281,651$60.3M0.01%-242,99213F-HRTimelineGroup
Boston Partnersin group Boston Trust Walden Corp5,276,356$60.2M0.07%+520,03313F-HRTimelineGroup
Edenbrook Capital, LLCin group Edenbrook Capital, LLC4,016,672$45.8M27.77%+913,13013F-HRTimelineGroup
Nuveen, LLCin group TIAA3,596,503$41M0.01%13F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC3,033,428$34.6M<0.01%+75,85013F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC2,961,009$33.8M0.02%+2,651,03313F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP2,903,060$33.1M<0.01%-39,07013F-HRTimelineGroup
Nine Ten Capital Management LLC2,734,830$31.2M11.65%-381,01913F-HRTimeline
Granahan Investment Management, LLC2,649,990$30.2M1.51%-963,09413F-HRTimeline
Driehaus Capital Management LLC2,409,439$27.5M0.27%-909,05413F-HRTimeline
NOMURA ASSET MANAGEMENT CO LTDin group NOMURA ASSET MANAGEMENT CO LTD2,055,793$23.5M0.07%+181,95813F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding2,038,659$23.3M-23,612Timeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp1,797,162$20.5M<0.01%-723,72813F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP1,570,877$17.9M<0.01%-87,65813F-HRTimelineGroup
ROYCE & ASSOCIATES LP1,182,806$13.5M0.15%-415,09013F-HRTimeline
Pacer Advisors, Inc.1,102,156$12.6M0.03%new13F-HRTimeline
Maestria Partners LLC1,052,317$12M5.07%+100,00013F-HRTimeline
Qube Research & Technologies Ltd1,038,131$11.8M0.02%+350,09813F-HRTimeline
Stephens Investment Management Group LLCgroup of 2 filers holding1,019,528$11.6M-46,488Timeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,017,939$11.6M<0.01%-31,47313F-HR/ATimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO988,789$11.3M<0.01%-522,65013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC926,800$10.6M<0.01%-223,74613F-HR/ATimelineGroup
KENNEDY CAPITAL MANAGEMENT LLC923,913$10.5M0.25%-545,85413F-HRTimeline
Penn Capital Management Company, LLC914,685$10.5M1.02%+135,80013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/913,431$10.4M<0.01%+562,64813F-HRTimelineGroup
Verition Fund Management LLC906,099$10.3M0.06%new13F-HRTimeline
GRIZZLYROCK CAPITAL, LLC898,541$10.3M9.3%+35,00013F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …902,771$10.1M0.01%+8,78213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY875,859$9.99M<0.01%-324,03513F-HRTimelineGroup
SILVERCREST ASSET MANAGEMENT GROUP LLC808,247$9.22M0.07%-261,50613F-HRTimeline
Meros Investment Management, LP749,438$8.55M5.02%-177,97313F-HRTimeline
INTRINSIC EDGE CAPITAL MANAGEMENT LLC733,044$8.36M1.75%+13,51213F-HRTimeline
Granite Investment Partners, LLC720,873$8.23M0.42%-187,93813F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND656,141$7.49M0.01%-11,45713F-HR/ATimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC643,143$7.34M<0.01%-23,45713F-HRTimelineGroup
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …600,665$6.85M0.01%-95,08913F-HRTimelineGroup
Kopion Asset Management, LLCin group Kopion Asset Management, LLC599,000$6.83M5.32%-42,50913F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC592,929$6.77M0.01%+282,69013F-HRTimelineGroup
HARBOR CAPITAL ADVISORS, INC.591,313$6.75M0.31%-251,44813F-HRTimeline
KING LUTHER CAPITAL MANAGEMENT CORP582,786$6.65M0.03%+48,21913F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding582,260$6.64M-86,909Timeline
Dana Investment Advisors, Inc.560,321$6.39M0.23%+86,69613F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…495,657$5.66M0.01%+128,50013F-HRTimelineGroup
Weiss Asset Management LPin group Weiss Asset Management LP455,128$5.19M0.14%+318,07613F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…448,085$5.11M0.01%+170,48013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC434,479$4.96M<0.01%+215,51313F-HRTimelineGroup
Advantage Alpha Capital Partners LP427,162$4.87M1.19%-34,74513F-HRTimeline
ARMISTICE CAPITAL, LLC389,000$4.44M0.12%new13F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC361,776$4.13M<0.01%-183,78813F-HRTimelineGroup
S SQUARED TECHNOLOGY, LLC351,621$4.01M2.05%-210,00013F-HRTimeline
FRONTIER CAPITAL MANAGEMENT CO LLC345,374$3.94M0.04%-301,30913F-HRTimeline
1492 Capital Management LLC325,802$3.72M2%-1,97313F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP323,910$3.7M<0.01%+46,49213F-HRTimelineGroup
CenterBook Partners LP317,004$3.62M0.23%-308,76113F-HRTimeline
Swiss National Bank272,600$3.11M<0.01%+22,70013F-HRTimeline
Connor, Clark & Lunn Investment Managem…269,286$3.07M0.01%-36,75013F-HRTimeline
Parallax Volatility Advisers, L.P.268,983$3.07M0.1%+51,01713F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC266,736$3.04M0.01%+255,12813F-HR/ATimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/240,945$2.75M<0.01%+77,64013F-HRTimelineGroup
EFG Asset Management (North America) Co…236,505$2.7M0.45%+38,73513F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD233,681$2.67M0.01%+161,82313F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC220,544$2.52M<0.01%+31,60413F-HRTimelineGroup
NORGES BANK219,298$2.5M<0.01%-179,34113F-HR/ATimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC210,134$2.4M<0.01%-94,16513F-HR/ATimelineGroup
Invesco Ltd.in group Invesco Ltd.208,991$2.38M<0.01%-63,10213F-HRTimelineGroup
OBERWEIS ASSET MANAGEMENT INC/205,700$2.35M0.12%013F-HRTimeline
RHUMBLINE ADVISERS192,502$2.2M<0.01%+8,17113F-HR/ATimeline
DARK FOREST CAPITAL MANAGEMENT LP173,864$1.98M0.09%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC171,294$1.95M<0.01%-69,08113F-HR/ATimelineGroup
COMMONWEALTH EQUITY SERVICES, LLC166,006$1.89M<0.01%+4,01913F-HRTimeline
Hilton Capital Management, LLC162,812$1.86M0.16%+6,60613F-HRTimeline
RICE HALL JAMES & ASSOCIATES, LLC156,839$1.79M0.11%-31,62713F-HRTimeline
ARDSLEY ADVISORY PARTNERS LP156,000$1.78M0.41%new13F-HRTimeline
CITIGROUP INCin group CITIGROUP INC153,568$1.75M<0.01%-185,11713F-HRTimelineGroup
P.A.W. CAPITAL CORP150,000$1.71M4.23%-45,00013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA148,268$1.69M<0.01%+21,50213F-HR/ATimelineGroup
PERKINS CAPITAL MANAGEMENT INC145,125$1.66M1.75%+1,30013F-HRTimeline
Lisanti Capital Growth, LLC143,855$1.64M0.49%-24,19013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc142,966$1.63M<0.01%+3,34913F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.136,645$1.56M<0.01%013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd135,118$1.54M0.08%new13F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\131,670$1.5M<0.01%-19,73613F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…130,061$1.48M<0.01%+11,38713F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC129,275$1.48M0.01%+41913F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources127,510$1.45M<0.01%-82913F-HRTimelineGroup
WEDGE CAPITAL MANAGEMENT L L P/NC125,166$1.43M0.03%+19,50013F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding124,722$1.42M+1,474Timeline
Squarepoint Ops LLCin group Squarepoint Ops LLC123,786$1.41M<0.01%-189,02513F-HR/ATimelineGroup
LPL Financial LLC122,352$1.4M<0.01%-7,25113F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC121,332$1.38M<0.01%-1,059,94613F-HRTimeline
Dynamic Technology Lab Private Ltd120,258$1.37M0.2%new13F-HRTimeline
Manatuck Hill Partners, LLC112,491$1.28M0.59%-29,10013F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC109,992$1.26M0.01%+55,97113F-HRTimeline
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…109,356$1.25M0.01%new13F-HRTimelineGroup
MOODY NATIONAL BANK TRUST DIVISIONin group MOODY NATIONAL BANK TRUST DIV…104,190$1.19M0.12%-6,08813F-HRTimelineGroup
PEAK6 LLCin group PEAK6 LLC103,167$1.18M0.05%new13F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…102,904$1.17M<0.01%-2713F-HR/ATimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.101,887$1.16M<0.01%+49,99513F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC100,150$1.14M<0.01%-39413F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/99,041$1.13M<0.01%+4,14813F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN93,929$1.07M<0.01%-134,08913F-HRTimelineGroup
GAMCO Investors (Gabelli)group of 2 filers holding89,606$1.02M-5,846Timeline
Riverwater Partners LLC84,179$960K0.49%+1013F-HRTimeline
Advisory Services Network, LLC83,710$955K0.02%-43,83213F-HRTimeline
Atlas Merchant Capital LLC82,500$941K2.36%013F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.77,223$881K0.14%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…74,847$854K<0.01%+3,26713F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…74,805$854K<0.01%-1,18813F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …73,263$836K<0.01%+1,47813F-HRTimelineGroup
GREENWOOD CAPITAL ASSOCIATES LLC66,221$756K0.1%+1,85213F-HRTimeline
CIBC WORLD MARKET INC.65,543$748K<0.01%new13F-HRTimeline
Calamos Advisors LLCin group Calamos Advisors LLC65,275$745K<0.01%+30,13213F-HRTimelineGroup
Corebridge Financial, Inc.in group Corebridge Financial, Inc.61,638$703K<0.01%-91413F-HRTimelineGroup
PINNACLE ASSOCIATES LTD60,295$688K0.01%-271,66613F-HRTimeline
Ensign Peak Advisors, Inc59,508$679K<0.01%013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson58,423$677K<0.01%013F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP54,295$620K<0.01%-1,82713F-HRTimelineGroup
Cardinal Point Capital Management ULC53,800$614K0.06%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP53,552$611K<0.01%-44,45013F-HRTimelineGroup
Cambridge Investment Research Advisors,…51,815$591K<0.01%+22,13113F-HRTimeline
Radcliffe Capital Management, L.P.50,000$570K0.06%new13F-HRTimeline
STRS OHIO47,700$544K<0.01%+16,10013F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …44,947$513K<0.01%+15,76213F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…43,989$502K<0.01%+11,82713F-HRTimeline
Legato Capital Management LLC43,320$494K0.07%-4,80313F-HRTimeline
HighTower Advisors, LLC42,271$482K<0.01%+21,72013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM40,330$460K<0.01%+3,48413F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO39,763$454K<0.01%-6,40613F-HR/ATimelineGroup
IMC-Chicago, LLC39,631$452K0.02%-36,77913F-HRTimeline
WOLVERINE TRADING, LLC38,715$449K0.01%-5,82313F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co38,604$441K<0.01%+6,59413F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…38,231$436K<0.01%013F-HRTimeline
Penbrook Management LLC38,170$436K0.33%-31013F-HRTimeline
PITCAIRN COin group PITCAIRN CO37,128$424K0.03%+4,60513F-HRTimelineGroup
Sanctuary Advisors, LLC36,998$422K<0.01%+17,83713F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP35,640$407K<0.01%+1,39813F-HRTimelineGroup
Fulton Bank, N.A.35,215$402K0.02%-73713F-HRTimeline
Cetera Investment Advisers33,821$386K<0.01%+10,08913F-HRTimeline
COMERICA BANK33,451$382K<0.01%+51413F-HRTimeline
Massar Capital Management, LP32,144$367K0.44%new13F-HRTimeline
GRIFFIN ASSET MANAGEMENT, INC.30,755$351K0.04%013F-HRTimeline
Handelsbanken Fonder AB30,100$343K<0.01%013F-HRTimeline
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …27,925$319K<0.01%new13F-HRTimelineGroup
CIBC WORLD MARKETS CORP27,918$319K<0.01%+16,14413F-HRTimeline
ProShare Advisors LLC27,236$311K<0.01%-8,19613F-HRTimeline
Police & Firemen's Retirement System of…26,732$305K<0.01%013F-HRTimeline
BROWN ADVISORY INCin group BROWN ADVISORY INC25,409$290K<0.01%new13F-HRTimelineGroup
Verdence Capital Advisors LLC24,770$283K0.02%+5,74813F-HRTimeline
TWO SIGMA SECURITIES, LLC24,655$281K0.04%new13F-HRTimeline
KLP KAPITALFORVALTNING AS24,600$281K<0.01%-3,20013F-HRTimeline
SG Americas Securities, LLC24,005$274K<0.01%new13F-HRTimeline
Scientech Research LLC23,901$273K0.07%new13F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…22,641$258K<0.01%+2,23813F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC22,673$257K<0.01%-45,04613F-HRTimelineGroup
ELEVATION POINT WEALTH PARTNERS, LLC22,454$256K0.02%-2,92313F-HR/ATimeline
ANTIPODES PARTNERS Ltd22,339$255K0.01%+14,26713F-HRTimeline
MML INVESTORS SERVICES, LLC21,502$245K<0.01%new13F-HRTimeline
Evanson Asset Management, LLC21,171$242K0.02%013F-HRTimeline
Vident Advisory, LLCin group Vident Advisory, LLC20,989$239K<0.01%+48713F-HRTimelineGroup
Outlook Wealth Advisors, LLC20,474$234K0.06%-11413F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS20,439$233K<0.01%new13F-HRTimeline
Ledgewood Wealth Advisors, LLC19,795$226K0.15%013F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC19,634$224K<0.01%-119,02513F-HRTimeline
AXQ CAPITAL, LP19,092$218K0.09%new13F-HRTimeline
AlphaQuest LLC19,077$218K0.02%+9,07313F-HRTimeline
M&T Bank Corpin group M&T Bank Corp18,960$216K<0.01%+4,53713F-HRTimelineGroup
Bayforest Capital Ltd17,835$203K0.09%+15,31813F-HR/ATimeline
Creative Planningin group Creative Planning17,718$202K<0.01%+2,47113F-HRTimelineGroup
Centiva Capital, LP17,000$194K0.01%new13F-HRTimeline
CONTRAVISORY INVESTMENT MANAGEMENT, INC.16,932$193K0.04%new13F-HRTimeline
CenterStar Asset Management, LLC16,800$192K0.28%new13F-HRTimeline
Kestra Advisory Services, LLCin group Kestra Advisory Services, LLC16,375$187K<0.01%new13F-HRTimelineGroup
BANTAMAC CAPITAL, LLC16,287$186K0.09%-15,54813F-HRTimeline
Kapitalo Investimentos Ltda15,975$182K0.04%new13F-HRTimeline
WOODMONT INVESTMENT COUNSEL LLC15,300$175K0.01%-5013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…14,986$171K<0.01%013F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC14,978$171K0.02%new13F-HRTimeline
JOHNSON INVESTMENT COUNSEL INC14,909$170K<0.01%-7,05913F-HRTimeline
CAPTRUST FINANCIAL ADVISORS14,747$168K<0.01%-3,56513F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS14,245$163K<0.01%-16,69413F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC14,175$162K<0.01%-2,85313F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC14,182$160K<0.01%-57313F-HRTimelineGroup
Aigen Investment Management, LP13,535$154K0.02%new13F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP13,468$154K<0.01%-783,52613F-HRTimelineGroup
Winthrop Advisory Group LLC13,400$153K0.02%+20013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…13,162$150K0.01%013F-HRTimelineGroup
HCR Wealth Advisors13,000$148K0.02%013F-HRTimeline
SHELL ASSET MANAGEMENT CO12,936$148K0.01%+10,93713F-HRTimeline
1858 WEALTH MANAGEMENT, LLC12,605$144K0.12%new13F-HRTimeline
Parkside Financial Bank & Trust11,690$133K0.02%+1,80413F-HRTimeline
BLACKHILL CAPITAL INC11,622$133K0.01%013F-HRTimeline
Diametric Capital, LP11,247$128K0.15%-3,97413F-HRTimeline
Patriot Financial Group Insurance Agenc…11,195$128K0.02%new13F-HRTimeline
Graham Capital Management, L.P.11,182$128K<0.01%-68,57713F-HRTimeline
Cornerstone Wealth Management, LLC10,920$125K0.01%013F-HRTimeline