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Disclosery

MAX MEDIAALPHA INC

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CL A (common), issuer CIK 1818383

143 managers (145 13F filers) reported a position in MAX shares at 2025-03-31, 47,216,866 shares in all. 19 filers opened a position and 37 filers sold out during the quarter.

Managers
143
13F filers
145
New
19
Added
60
Reduced
44
Sold out
37
Shares held by filers
47,216,866

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

The latest Form 4 transactions, non-derivative.
OwnerDateSharesPriceFiling
Yi Stevendirector, officer (See Remarks)2026-10-09-2,033 S$11.0068Form 4
Yi Stevendirector, officer (See Remarks)2026-10-08-24,000 S$10.0393Form 4

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
WHITE MOUNTAINS INSURANCE GROUP LTD17,856,614$165M57.7%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.3,697,726$34.2M<0.01%+140,67713F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC2,913,328$26.9M<0.01%-710,01613F-HRTimelineGroup
Broad Bay Capital Management, LP2,747,778$25.4M3.82%+529,09313F-HRTimeline
Clearline Capital LP2,654,921$24.5M2.48%+1,466,76013F-HRTimeline
TimesSquare Capital Management, LLC1,372,174$12.7M0.2%-256,64113F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY737,921$6.82M<0.01%+126,86013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC736,531$6.81M<0.01%-68,39913F-HR/ATimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC727,753$6.73M<0.01%+29,05013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.670,691$6.2M0.01%+292,48013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP623,787$5.76M<0.01%+17,80113F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC614,542$5.68M0.01%-166,80713F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding595,715$5.5M+90,111Timeline
Shay Capital LLC571,841$5.28M1.54%+124,34113F-HRTimeline
J. Goldman & Co LP568,052$5.25M0.19%+256,92713F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC565,500$5.23M0.01%+26,20013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC557,796$5.15M0.01%+85,58113F-HRTimelineGroup
Nuveen, LLCin group TIAA505,907$4.67M<0.01%13F-HRTimelineGroup
Qube Research & Technologies Ltd469,625$4.34M0.01%-200,52813F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP458,509$4.24M0.01%+70,80813F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC430,239$3.98M<0.01%+275,20513F-HRTimelineGroup
JACOBS ASSET MANAGEMENT, LLC408,412$3.77M2.39%+51,51213F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co320,839$2.96M<0.01%-3,65813F-HR/ATimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC321,302$2.96M0.01%-123,45113F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO308,298$2.85M<0.01%+185,91213F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …296,054$2.74M<0.01%-466,52113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP285,560$2.64M<0.01%+3,38813F-HRTimelineGroup
EARNEST PARTNERS LLC272,433$2.52M0.01%+30,87413F-HRTimeline
ALGERT GLOBAL LLC225,300$2.08M0.05%+88,79113F-HR/ATimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding216,096$2M-126,502Timeline
Hillsdale Investment Management Inc.214,600$1.98M0.1%+5,70013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/214,270$1.98M<0.01%+162,68113F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\180,691$1.67M<0.01%+80,62013F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…168,032$1.55M<0.01%+136,77913F-HRTimelineGroup
Allianz Asset Management GmbHin group Allianz SE161,772$1.49M<0.01%-4,66313F-HRTimelineGroup
HRT FINANCIAL LP155,098$1.43M0.01%+85,31913F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC148,521$1.37M0.01%+22,47613F-HRTimeline
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…144,045$1.33M0.06%+58,96413F-HRTimelineGroup
ExodusPoint Capital Management, LP139,852$1.29M0.02%-27,06013F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC138,598$1.28M0.01%-337,74413F-HRTimeline
Mariner, LLCin group Mariner, LLC136,787$1.26M<0.01%+76,35413F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC134,557$1.24M<0.01%-20,90113F-HR/ATimelineGroup
PDT Partners, LLC129,717$1.2M0.09%new13F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC120,424$1.11M<0.01%+65,11513F-HR/ATimelineGroup
Trexquant Investment LP111,223$1.03M0.01%-28,35513F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO103,905$960K<0.01%-11,27613F-HR/ATimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp89,654$828K<0.01%-29513F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management86,754$802K<0.01%new13F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC77,192$713K<0.01%-8,37213F-HRTimeline
Graham Capital Management, L.P.73,945$683K0.02%+9,69413F-HRTimeline
Swiss National Bank69,400$641K<0.01%+5,30013F-HRTimeline
TUDOR INVESTMENT CORP ET AL67,447$623K0.01%new13F-HRTimeline
Engineers Gate Manager LP65,084$601K0.01%+13,89713F-HRTimeline
BLAIR WILLIAM & CO/IL64,137$593K<0.01%+11,07113F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC63,148$583K<0.01%+68513F-HR/ATimelineGroup
Verition Fund Management LLC54,359$502K<0.01%-3,03713F-HRTimeline
AlphaQuest LLC52,156$482K0.05%+49,80013F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC50,406$472K<0.01%+8,98113F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources47,448$438K<0.01%-12,27613F-HRTimelineGroup
FOX RUN MANAGEMENT, L.L.C.47,269$437K0.07%+47213F-HRTimeline
CITIGROUP INCin group CITIGROUP INC45,067$416K<0.01%+16,89413F-HRTimelineGroup
Cannell & Spears LLC44,200$408K0.01%-1,50013F-HRTimeline
Dynamic Technology Lab Private Ltd43,176$399K0.06%-2,47813F-HRTimeline
RHUMBLINE ADVISERS41,388$382K<0.01%-2,04313F-HR/ATimeline
Connor, Clark & Lunn Investment Managem…41,283$381K<0.01%-26,54913F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …42,298$381K<0.01%+14,87113F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS39,147$362K<0.01%+10,51713F-HRTimelineGroup
Nebula Research & Development LLC37,106$343K0.03%-3,00313F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…35,937$332K<0.01%-13,68813F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP31,027$287K0.03%-78313F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…30,346$280K<0.01%013F-HRTimeline
IEQ CAPITAL, LLC29,213$270K<0.01%+14,21713F-HRTimeline
ALLIANCEBERNSTEIN L.P.28,330$262K<0.01%013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc28,086$260K<0.01%-8813F-HRTimelineGroup
STONERIDGE INVESTMENT PARTNERS LLC27,547$255K0.22%013F-HRTimeline
Integrated Quantitative Investments LLC27,169$251K0.12%-12913F-HRTimeline
Schonfeld Strategic Advisors LLC26,600$246K<0.01%-70013F-HRTimeline
Y-Intercept (Hong Kong) Ltd26,288$243K0.02%+15,70513F-HRTimeline
Quantbot Technologies LP25,999$240K0.01%-11,24813F-HRTimeline
Jain Global LLC23,603$218K<0.01%new13F-HRTimeline
Campbell & CO Investment Adviser LLC21,671$200K0.02%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA21,491$198K<0.01%+20,32813F-HR/ATimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…21,402$198K<0.01%013F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/20,236$187K<0.01%013F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS19,947$184K<0.01%-17,59213F-HRTimeline
Virtus Investment Advisers, LLCgroup of 2 filers holding18,711$173K+3,513Timeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…17,871$165K<0.01%+78013F-HRTimelineGroup
Corton Capital Inc.17,440$161K0.53%-21,04713F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC17,397$161K<0.01%+4,94813F-HRTimeline
SHERBROOKE PARK ADVISERS LLC17,054$158K0.07%-25,78913F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …16,749$155K<0.01%new13F-HRTimelineGroup
CWM, LLCin group CWM, LLC16,523$153K<0.01%+9,96213F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC16,235$150K<0.01%new13F-HRTimelineGroup
Polymer Capital Management (US) LLC15,394$142K0.04%new13F-HRTimeline
EntryPoint Capital, LLC14,879$137K0.06%new13F-HRTimeline
Corebridge Financial, Inc.in group Corebridge Financial, Inc.14,859$137K<0.01%+913F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN14,492$134K<0.01%+8313F-HRTimelineGroup
LPL Financial LLC14,482$134K<0.01%+4,36013F-HRTimeline
SG Americas Securities, LLC14,292$132K<0.01%-2,13313F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP14,211$131K0.01%-13,66113F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson13,862$130K<0.01%013F-HRTimelineGroup
VIRGINIA RETIREMENT SYSTEMS ET Al12,700$117K<0.01%13F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…11,928$110K<0.01%013F-HRTimeline
Bridgefront Capital, LLC11,440$106K0.03%new13F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …11,247$104K<0.01%+4113F-HRTimelineGroup
DEERFIELD MANAGEMENT COMPANY, L.P.in group DEERFIELD MANAGEMENT COMPANY,…10,795$99.7K<0.01%new13F-HRTimelineGroup
MACKENZIE FINANCIAL CORP10,567$97.6K<0.01%-49,69213F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM10,271$94.9K<0.01%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND9,864$91.1K<0.01%013F-HR/ATimeline
SIMPLEX TRADING, LLC8,718$80K<0.01%+6,98113F-HRTimeline
Police & Firemen's Retirement System of…6,822$63K<0.01%013F-HRTimeline
KLP KAPITALFORVALTNING AS5,933$54.8K<0.01%013F-HRTimeline
State of Wyoming5,023$46.4K0.01%+51713F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…4,338$40.1K<0.01%-10,12413F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\4,160$38.4K<0.01%-19,38713F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,026$28K<0.01%013F-HRTimelineGroup
Covestor Ltd2,602$24K0.02%-16413F-HRTimeline
GROUP ONE TRADING LLC2,187$20.2K<0.01%-12,26013F-HRTimeline
FMR LLCin group FMR LLC1,990$18.4K<0.01%+95513F-HRTimelineGroup
Quarry LP1,512$14K<0.01%-4,32913F-HRTimeline
Brooklyn Investment Group1,498$13.8K<0.01%new13F-HRTimeline
AMALGAMATED BANK1,031$10K<0.01%+29313F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP700$6.54K<0.01%+20013F-HR/ATimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.654$6.04K<0.01%+55413F-HRTimelineGroup
Caitong International Asset Management …503$4.65K<0.01%+43713F-HRTimeline
Murphy & Mullick Capital Management Corp500$4.62K<0.01%013F-HRTimeline
GAMMA Investing LLC317$2.93K<0.01%+28413F-HR/ATimeline
Aster Capital Management (DIFC) Ltd306$2.84K<0.01%new13F-HRTimeline
GPS Wealth Strategies Group, LLC300$2.77K<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…239$2.21K<0.01%+23113F-HRTimelineGroup
Farther Finance Advisors, LLC232$2.09K<0.01%new13F-HRTimeline
QUADRANT CAPITAL GROUP LLC169$1.56K<0.01%013F-HRTimeline
Allworth Financial LP117$991<0.01%new13F-HRTimeline
COLDSTREAM CAPITAL MANAGEMENT INC107$989<0.01%new13F-HRTimeline
Arax Advisory Partners84$777<0.01%-1513F-HRTimeline
SBI Securities Co., Ltd.66$610<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…40$370<0.01%013F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC35$323<0.01%new13F-HRTimeline
Sterling Capital Management LLC31$286<0.01%013F-HRTimeline
IFP Advisors, Inc26$240<0.01%013F-HRTimeline
Parallel Advisors, LLC23$213<0.01%+613F-HRTimeline
True Wealth Design, LLC22$204<0.01%-5413F-HRTimeline
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.

Events

  • Yi Steven sold 26,033 MAX shares between 2026-10-08 and 2026-10-09, Form 4 filed 2026-10-09. 0001818383-26-000249

    Accepted , ingested