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Disclosery

MAX MEDIAALPHA INC

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CL A (common), issuer CIK 1818383

148 managers (154 13F filers) reported a position in MAX shares at 2026-06-30, 48,666,579 shares in all. 21 filers opened a position and 28 filers sold out during the quarter.

Managers
148
13F filers
154
New
21
Added
47
Reduced
66
Sold out
28
Shares held by filers
48,666,579

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 2026

Filers in the available 13F reports with a share position at 2026-06-30, 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
WHITE MOUNTAINS INSURANCE GROUP LTD17,856,614$224M57.03%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.3,392,357$42.6M<0.01%-84,33013F-HRTimelineGroup
Clearline Capital LP2,713,890$34.1M2.2%+123,22013F-HRTimeline
VANGUARD GROUP INCgroup of 6 filers holding1,970,024$24.8M-251,688Timeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,880,062$23.3M<0.01%+134,38313F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,068,308$13.4M<0.01%-1,77613F-HRTimelineGroup
Divisadero Street Capital Management, LPin group Divisadero Street Capital Man…1,019,988$12.8M0.3%+933,08113F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC971,232$12.2M0.04%+221,17813F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC957,095$12M0.01%+109,89613F-HRTimelineGroup
JACOBS ASSET MANAGEMENT, LLC919,761$11.6M8.71%-4,68213F-HRTimeline
STATE STREET CORPin group STATE STREET CORP862,235$10.8M<0.01%+24,07413F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …829,958$10.4M<0.01%-232,02313F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY821,170$10.3M<0.01%+118,15213F-HRTimelineGroup
Nuveen, LLCin group TIAA752,447$9.46M<0.01%+51,04813F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP701,914$8.82M<0.01%+81,24513F-HRTimelineGroup
J. Goldman & Co LP598,070$7.52M0.26%-584,60313F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC589,696$7.41M<0.01%+360,37313F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC574,407$7.22M0.01%-144,89313F-HRTimeline
Shay Capital LLC570,000$7.16M0.79%-205,00013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC551,625$6.93M<0.01%+268,61713F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.535,926$6.74M<0.01%+193,86813F-HRTimelineGroup
SPEECE THORSON CAPITAL GROUP INC489,098$6.15M1.31%-9,91313F-HRTimeline
EVR Research LP440,000$5.53M2.73%new13F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC428,866$5.39M<0.01%-194,55513F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP409,480$5.15M<0.01%+234,19113F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC391,641$4.92M<0.01%-90,31013F-HRTimelineGroup
HRT FINANCIAL LP372,929$4.69M0.01%+43,59713F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/371,840$4.67M<0.01%+92,13613F-HRTimelineGroup
Triad Investment Management368,731$4.63M5.11%+34,86713F-HRTimeline
Stoic Point Capital Management LLC297,150$3.74M3.14%+76,10913F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP267,107$3.36M<0.01%-4,71713F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co259,224$3.26M<0.01%-15,11513F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC234,255$2.94M0.01%+18,71413F-HRTimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS216,405$2.72M0.01%+31,08013F-HRTimeline
UBS Group AGgroup of 2 filers holding213,773$2.69M-120,621Timeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS209,204$2.63M<0.01%+152,99813F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd172,269$2.17M0.03%+25,43113F-HRTimelineGroup
ALGERT GLOBAL LLC170,870$2.15M0.03%+86,36013F-HRTimeline
Man Group plcin group Man Group plc156,754$1.97M<0.01%+20,04713F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.211,450$1.97M<0.01%+6,01013F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC148,845$1.87M<0.01%+11,23213F-HRTimelineGroup
Quantinno Capital Management LP136,034$1.71M<0.01%+28,76013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…130,360$1.63M<0.01%+45,46613F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP126,175$1.59M<0.01%new13F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC101,365$1.27M<0.01%+14,09613F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management101,046$1.27M<0.01%-7,76213F-HRTimelineGroup
Qube Research & Technologies Ltd92,453$1.16M<0.01%-322,82713F-HRTimeline
PDT Partners, LLC84,022$1.06M0.06%-6,00013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp81,504$1.02M<0.01%-5,45113F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC80,306$1.01M<0.01%new13F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources74,587$938K<0.01%-269,12213F-HRTimelineGroup
Amundiin group Amundi70,311$884K<0.01%-7,79313F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD70,309$884K<0.01%-35,85113F-HRTimeline
WINMILL & CO. INCin group WINMILL & CO. INC65,102$818K0.18%new13F-HRTimelineGroup
Swiss National Bank60,800$764K<0.01%+2,10013F-HRTimeline
BLAIR WILLIAM & CO/IL56,046$704K<0.01%+7113F-HRTimeline
GLOBEFLEX CAPITAL L P55,850$702K0.09%-24,38313F-HRTimeline
Allianz Asset Management GmbHin group Allianz SE70,176$653K<0.01%013F-HRTimelineGroup
Campbell & CO Investment Adviser LLC46,617$586K0.03%+30,53213F-HRTimeline
RHUMBLINE ADVISERS45,932$577K<0.01%-1,95213F-HRTimeline
Hillsdale Investment Management Inc.45,900$577K0.01%new13F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …44,831$564K<0.01%-3,05413F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO44,637$561K<0.01%+8,89913F-HRTimelineGroup
Mariner, LLCin group Mariner, LLC41,127$517K<0.01%-17,36213F-HRTimelineGroup
Caption Management, LLC37,515$472K0.02%-111,53313F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/37,076$467K<0.01%013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC37,065$466K<0.01%-9,97613F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\34,254$431K<0.01%-83413F-HRTimelineGroup
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…34,001$427K0.01%new13F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC30,349$381K<0.01%-15,01513F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN28,163$354K<0.01%+15,83813F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc27,533$346K<0.01%013F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…27,117$341K<0.01%new13F-HRTimelineGroup
Dynamic Technology Lab Private Ltd26,868$338K0.08%-16,72713F-HRTimeline
FMR LLCin group FMR LLC26,386$332K<0.01%-78813F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.26,039$327K<0.01%+2,41213F-HRTimelineGroup
State of Alaska, Department of Revenue25,862$324K<0.01%+24,00013F-HRTimeline
TUDOR INVESTMENT CORP ET AL25,748$324K<0.01%new13F-HRTimeline
ALLSTATE CORPin group ALLSTATE CORP25,287$318K<0.01%new13F-HRTimelineGroup
AXQ CAPITAL, LP25,117$316K0.03%new13F-HRTimeline
Abel Hall, LLC24,473$308K0.05%-95113F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…24,141$303K<0.01%-1,11113F-HR/ATimeline
CITIGROUP INCin group CITIGROUP INC24,003$302K<0.01%+14,02513F-HRTimelineGroup
Corient Private Wealth LPin group Corient Private Wealth LP23,451$295K<0.01%+7,89213F-HR/ATimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…23,247$292K<0.01%-166,48913F-HRTimelineGroup
Quantbot Technologies LP21,568$271K0.01%-7,55113F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…21,402$269K<0.01%013F-HRTimelineGroup
JUPITER ASSET MANAGEMENT LTDin group JUPITER ASSET MANAGEMENT LTD21,172$266K<0.01%013F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…18,642$234K<0.01%013F-HRTimeline
Graham Capital Management, L.P.17,179$216K0.01%+2,63613F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV16,595$209K<0.01%+44013F-HR/ATimeline
Creative Planningin group Creative Planning16,220$204K<0.01%-3,72613F-HRTimelineGroup
NOMURA HOLDINGS INCin group NOMURA ASSET MANAGEMENT CO LTD16,058$202K<0.01%new13F-HRTimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…14,811$198K<0.01%-6,10513F-HRTimeline
IEQ CAPITAL, LLC15,367$193K<0.01%-17,55413F-HRTimeline
EP Wealth Advisors, LLC15,273$192K<0.01%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…14,208$179K<0.01%-1,92413F-HRTimelineGroup
Jupiter Topco LLCin group Janus Henderson13,862$174K<0.01%13F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC13,617$171K<0.01%-1,41613F-HRTimelineGroup
LPL Financial LLC13,300$167K<0.01%new13F-HRTimeline
GLENMEDE TRUST CO NAin group GLENMEDE TRUST CO NA12,218$154K<0.01%-93213F-HRTimelineGroup
MACKENZIE FINANCIAL CORP12,137$153K<0.01%-2,15613F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.11,327$142K0.02%-25,62813F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC11,145$140K<0.01%new13F-HRTimelineGroup
Cresset Asset Management, LLC11,123$140K<0.01%-27213F-HRTimeline
Arax Advisory Partners10,534$132K<0.01%+9,36213F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/10,494$132K<0.01%013F-HRTimelineGroup
Police & Firemen's Retirement System of…9,690$122K<0.01%013F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND6,264$78.7K<0.01%013F-HRTimeline
KLP KAPITALFORVALTNING AS5,933$74.6K<0.01%013F-HRTimeline
Covestor Ltd4,777$60K0.03%+1,32413F-HRTimeline
ELKHORN PARTNERS LIMITED PARTNERSHIPin group ELKHORN PARTNERS LIMITED PART…4,500$56.6K0.05%-18,50013F-HRTimelineGroup
NEW YORK STATE TEACHERS RETIREMENT SYST…3,128$39K<0.01%+3,02813F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,026$38K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,886$36.3K<0.01%-20113F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,728$22K<0.01%-4,00913F-HRTimelineGroup
Caitong International Asset Management …1,219$15.3K<0.01%+1,11413F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,037$13K<0.01%013F-HRTimelineGroup
Versant Capital Management, Inc829$10.4K<0.01%-17013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…810$10.2K<0.01%-45113F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…684$8.6K<0.01%-2,44313F-HRTimelineGroup
Integrated Wealth Concepts LLC659$8.28K<0.01%new13F-HRTimeline
Allworth Financial LP605$7.61K<0.01%-50013F-HRTimeline
Farther Finance Advisors, LLC504$6.33K<0.01%+25613F-HRTimeline
Murphy & Mullick Capital Management Corp500$6.29K<0.01%013F-HRTimeline
GAMMA Investing LLC496$6.24K<0.01%+5013F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.464$5.83K<0.01%-813F-HRTimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK390$4.9K<0.01%-713F-HRTimelineGroup
RAFFA WEALTH MANAGEMENT, LLC290$3.65K<0.01%new13F-HRTimeline
Essential Partners LLC275$3.46K<0.01%-6,18213F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT192$2.41K<0.01%new13F-HRTimeline
GROUP ONE TRADING LLC185$2.33K<0.01%013F-HRTimeline
Quarry LP165$2.07K<0.01%new13F-HRTimeline
Buck Wealth Strategies, LLC153$1.92K<0.01%new13F-HRTimeline
ROTHSCHILD INVESTMENT LLC142$1.78K<0.01%-9513F-HRTimeline
Marquette Asset Management, LLC139$1.75K<0.01%-5913F-HRTimeline
NISA INVESTMENT ADVISORS, LLC135$1.7K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.126$1.58K<0.01%-10413F-HRTimelineGroup
Sterling Capital Management LLC105$1.32K<0.01%-11213F-HRTimeline
Fortitude Family Office, LLC101$1.27K<0.01%new13F-HRTimeline
True Wealth Design, LLC80$1.01K<0.01%+2913F-HRTimeline
Parallel Advisors, LLC68$855<0.01%-30813F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…64$804<0.01%-7113F-HRTimelineGroup
Smartleaf Asset Management LLC44$545<0.01%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\39$490<0.01%-14313F-HRTimelineGroup
MassMutual Private Wealth & Trust, FSB25$314<0.01%new13F-HRTimeline
SJS Investment Consulting Inc.13$164<0.01%+413F-HRTimeline
IFP Advisors, Inc2$25<0.01%-13213F-HRTimeline