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Disclosery

MAX MEDIAALPHA INC

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CL A (common), issuer CIK 1818383

170 managers (172 13F filers) reported a position in MAX shares at 2025-12-31, 47,777,669 shares in all. 32 filers opened a position and 19 filers sold out during the quarter.

Managers
170
13F filers
172
New
32
Added
76
Reduced
48
Sold out
19
Shares held by filers
47,777,669

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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$231M88.28%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.3,551,465$46M<0.01%-21,72513F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC2,570,992$33.3M<0.01%-29,62913F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,367,896$17.7M<0.01%+309,45513F-HRTimelineGroup
Clearline Capital LP1,301,453$16.9M1.27%+10,60413F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC1,045,400$13.5M0.02%+100,30013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY960,154$12.4M<0.01%+88,12313F-HR/ATimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …855,904$11.1M0.01%+335,45213F-HRTimelineGroup
Divisadero Street Capital Management, LPin group Divisadero Street Capital Man…849,011$11M0.63%+762,10413F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC804,095$10.4M0.01%+33,41613F-HRTimelineGroup
J. Goldman & Co LP786,369$10.2M0.4%+255,34213F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC777,304$10.1M<0.01%+7,53013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC751,745$9.74M0.01%-677,81113F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP731,407$9.47M<0.01%+59,28113F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC729,457$9.45M0.01%+18,63813F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC729,367$9.45M<0.01%-550,59313F-HR/ATimelineGroup
JACOBS ASSET MANAGEMENT, LLC705,299$9.13M5.09%-113,72713F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC700,497$9.07M0.04%+139,73213F-HRTimeline
Nuveen, LLCin group TIAA666,539$8.63M<0.01%-23,92613F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC606,171$7.84M0.01%+186,33213F-HRTimelineGroup
Shay Capital LLC591,000$7.65M1.23%-199,10013F-HRTimeline
G2 Investment Partners Management LLC496,916$6.44M1.53%+121,44313F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.397,380$5.15M<0.01%-57,50313F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC360,129$4.66M0.01%+183,82413F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources328,712$4.26M<0.01%+10,74013F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP328,388$4.25M<0.01%+145,64513F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP319,798$4.14M<0.01%+201,10613F-HRTimelineGroup
Qube Research & Technologies Ltd284,012$3.68M0.01%-220,33013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co279,817$3.62M<0.01%+8313F-HRTimelineGroup
Triad Investment Management275,437$3.57M3.61%13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS273,151$3.54M<0.01%+79,56413F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP267,278$3.46M<0.01%-20,48413F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson265,906$3.44M<0.01%-120,24913F-HRTimelineGroup
Pacer Advisors, Inc.263,024$3.41M0.01%+16,59713F-HR/ATimeline
Y-Intercept (Hong Kong) Ltd210,352$2.72M0.06%+2,73613F-HRTimeline
Stoic Point Capital Management LLC207,298$2.68M2.28%13F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management184,159$2.38M<0.01%new13F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC169,647$2.2M<0.01%new13F-HRTimelineGroup
PDT Partners, LLC165,540$2.14M0.14%013F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD136,500$1.77M<0.01%+5,90013F-HRTimeline
UBS Group AGgroup of 2 filers holding124,774$1.62M-84,870Timeline
Squarepoint Ops LLCin group Squarepoint Ops LLC124,288$1.61M<0.01%+93,63013F-HRTimelineGroup
Man Group plcin group Man Group plc110,876$1.44M<0.01%new13F-HRTimelineGroup
HRT FINANCIAL LP109,023$1.41M<0.01%new13F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC108,143$1.4M0.04%+37,47713F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC91,424$1.18M<0.01%+5,58413F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…90,843$1.18M<0.01%+39,20913F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd90,702$1.17M0.03%+61,62813F-HRTimelineGroup
IEQ CAPITAL, LLC88,136$1.14M<0.01%+8,57913F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp87,312$1.13M<0.01%-11,83213F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding86,756$1.12M+43,832Timeline
TUDOR INVESTMENT CORP ET AL83,330$1.08M0.01%new13F-HRTimeline
NOMURA HOLDINGS INCin group NOMURA ASSET MANAGEMENT CO LTD82,313$1.07M<0.01%+29,34813F-HRTimelineGroup
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…82,050$1.06M0.04%-271,88013F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO81,844$1.06M<0.01%+19,12313F-HRTimelineGroup
ExodusPoint Capital Management, LP81,791$1.06M0.01%new13F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…80,990$1.05M<0.01%+16,81013F-HRTimelineGroup
GLOBEFLEX CAPITAL L P80,233$1.04M0.16%new13F-HRTimeline
Allianz Asset Management GmbHin group Allianz SE70,176$909K<0.01%013F-HRTimelineGroup
Mariner, LLCin group Mariner, LLC69,891$905K<0.01%+7,98213F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC72,285$884K<0.01%-32,29513F-HRTimeline
BLAIR WILLIAM & CO/IL60,146$779K<0.01%-6,05113F-HRTimeline
Swiss National Bank58,700$760K<0.01%013F-HRTimeline
Amundiin group Amundi58,616$759K<0.01%new13F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/58,164$753K<0.01%-23,91513F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC52,708$683K<0.01%+11,30013F-HRTimelineGroup
RHUMBLINE ADVISERS48,522$628K<0.01%-5,06813F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD46,842$607K<0.01%+15,65113F-HRTimeline
GSA CAPITAL PARTNERS LLP46,784$606K0.05%new13F-HRTimeline
MACKENZIE FINANCIAL CORP42,975$559K<0.01%+27,85813F-HRTimeline
Quantinno Capital Management LP42,748$554K<0.01%+25,49513F-HRTimeline
CWM, LLCin group CWM, LLC42,278$548K<0.01%+3,89513F-HRTimelineGroup
Allspring Global Investments Holdings, …in group Allspring Global Investments …42,950$513K<0.01%+3,75513F-HRTimelineGroup
Verition Fund Management LLC39,303$509K<0.01%-1,95013F-HRTimeline
Gotham Asset Management, LLC39,123$507K<0.01%-3,32113F-HRTimeline
State of Wyoming38,832$503K0.06%-7,39313F-HRTimeline
AlphaQuest LLC37,463$485K0.03%+27,60413F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN37,072$480K<0.01%+16,61013F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…36,379$471K<0.01%new13F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC35,403$458K<0.01%+10,68713F-HRTimelineGroup
PharVision Advisers, LLC34,034$441K0.22%+9,55413F-HRTimeline
ALLIANCEBERNSTEIN L.P.33,930$439K<0.01%-4,70013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc33,817$438K<0.01%-11713F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\31,640$410K<0.01%+1,23113F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/31,014$402K<0.01%+2,23813F-HRTimeline
Versor Investments LP29,318$380K0.06%new13F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.26,035$337K0.05%new13F-HRTimeline
Invesco Ltd.in group Invesco Ltd.26,024$337K<0.01%+6,31913F-HRTimelineGroup
Cannell & Spears LLC25,550$331K0.01%-15013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…25,504$330K<0.01%-4,84313F-HRTimeline
Creative Planningin group Creative Planning25,272$327K<0.01%+5,74313F-HRTimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…26,437$313K<0.01%+6,22513F-HRTimeline
Graham Capital Management, L.P.23,427$303K0.01%new13F-HRTimeline
Brookwood Investment Group LLC22,841$296K0.04%new13F-HRTimeline
MANGROVE PARTNERS IM, LLC22,700$294K0.02%new13F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…21,402$277K<0.01%013F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC20,777$269K<0.01%-6,86713F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.18,751$243K<0.01%new13F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…18,642$241K<0.01%013F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC18,539$240K<0.01%new13F-HRTimelineGroup
VIRGINIA RETIREMENT SYSTEMS ET Al17,700$229K<0.01%-6,80013F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV16,960$220K<0.01%+4,12013F-HRTimeline
VARCOV Co.16,543$214K0.08%13F-HRTimeline
Engineers Gate Manager LP16,125$209K<0.01%-13,93313F-HRTimeline
SG Americas Securities, LLC15,805$205K<0.01%-8,23313F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…15,758$204K<0.01%+10113F-HRTimelineGroup
Cornerstone Investment Partners, LLC14,650$190K0.01%new13F-HRTimeline
CAXTON ASSOCIATES LLP13,922$180K<0.01%new13F-HRTimeline
Pallas Capital Advisors LLC13,176$171K0.01%+2,82413F-HRTimeline
Moran Wealth Management, LLC12,716$165K0.01%new13F-HRTimeline
Voleon Capital Management LP12,324$160K<0.01%-19,76613F-HRTimeline
Polymer Capital Management (US) LLC12,306$159K0.02%-10313F-HRTimeline
Cresset Asset Management, LLC12,262$159K<0.01%-18613F-HRTimeline
Brooklyn Investment Group12,041$154K0.01%new13F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS10,978$142K<0.01%-69,55213F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC10,796$140K<0.01%-1,61113F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …10,782$140K<0.01%-1,00313F-HRTimelineGroup
VIRTUS ADVISERS, LLCin group Virtus Investment Advisers, L…10,623$138K0.07%-8,08813F-HRTimelineGroup
State of Tennessee, Department of Treas…12,903$132K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…9,690$125K<0.01%-35013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC8,293$107K<0.01%+4,94413F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA6,519$85K<0.01%-12,70413F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND6,264$81.1K<0.01%013F-HRTimeline
Essential Partners LLC5,939$76.9K0.02%+23213F-HRTimeline
KLP KAPITALFORVALTNING AS5,933$76.8K<0.01%013F-HRTimeline
FMR LLCin group FMR LLC4,827$62.5K<0.01%+72013F-HRTimelineGroup
SIMPLEX TRADING, LLC3,875$50.2K<0.01%+1,10813F-HRTimeline
STRS OHIO3,800$49.2K<0.01%new13F-HRTimeline
Covestor Ltd3,393$44K0.02%+70413F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,026$39.2K<0.01%013F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…2,805$36.3K<0.01%+2,77713F-HR/ATimelineGroup
GROUP ONE TRADING LLC2,329$30.2K<0.01%-32813F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP2,313$30K<0.01%new13F-HRTimelineGroup
Quarry LP2,297$29.7K<0.01%-1,79013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,177$28.2K<0.01%-2,22113F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…2,045$26.5K<0.01%+15113F-HRTimelineGroup
State of Alaska, Department of Revenue1,862$24K<0.01%013F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.1,323$17.1K<0.01%+1,29413F-HRTimelineGroup
Allworth Financial LP1,261$16.3K<0.01%+28813F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,129$14.6K<0.01%+6713F-HRTimelineGroup
Arax Advisory Partners1,099$14.2K<0.01%-18,55713F-HRTimeline
AMALGAMATED BANK1,065$14K<0.01%+3413F-HRTimeline
Aster Capital Management (DIFC) Ltd987$12.8K0.01%+85913F-HRTimeline
MEEDER ASSET MANAGEMENT INCin group Meeder Advisory Services, Inc.714$9.25K<0.01%new13F-HRTimelineGroup
IFP Advisors, Inc708$9.17K<0.01%+38213F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …594$8K<0.01%new13F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\503$6.51K<0.01%+113F-HRTimelineGroup
Murphy & Mullick Capital Management Corp500$6.47K<0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC340$4.4K<0.01%+16013F-HRTimeline
True Wealth Design, LLC336$4.35K<0.01%+9613F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.270$3.5K<0.01%-10213F-HRTimelineGroup
Marquette Asset Management, LLC243$3.15K<0.01%+12413F-HRTimeline
Sterling Capital Management LLC217$2.81K<0.01%+13613F-HRTimeline
NISA INVESTMENT ADVISORS, LLC201$2.6K<0.01%+813F-HRTimeline
Farther Finance Advisors, LLC187$2.42K<0.01%-4613F-HRTimeline
GAMMA Investing LLC187$2.42K<0.01%+5313F-HRTimeline
SageView Advisory Group, LLC90$1.17K<0.01%new13F-HRTimeline
Parallel Advisors, LLC84$1.09K<0.01%+1313F-HRTimeline
TUCKER ASSET MANAGEMENT LLC83$1.07K<0.01%new13F-HRTimeline
Versant Capital Management, Inc78$1.01K<0.01%+4613F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…75$971<0.01%-9113F-HRTimelineGroup
Caitong International Asset Management …47$609<0.01%+1113F-HR/ATimeline
Smartleaf Asset Management LLC44$573<0.01%new13F-HRTimeline
SIGNATUREFD, LLC39$505<0.01%013F-HRTimeline
SJS Investment Consulting Inc.24$311<0.01%new13F-HRTimeline
Clearstead Advisors, LLC15$195<0.01%-27813F-HRTimeline
MAI Capital Management14$182<0.01%new13F-HRTimeline
Sunbelt Securities, Inc.14$181<0.01%-1513F-HRTimeline
American Capital Advisory, LLC4$52<0.01%new13F-HRTimeline
Capital Advisors, Ltd. LLC12$00%013F-HRTimelineValue 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