13F

Stock

MediaAlpha, Inc.

MAX · held by 172 managers

Reported value

$607M

Holders

172

+2 new · −0 exited

Holders’ est. mark

$1.64M

Price effect on 8 books still in the name

Largest holder

$231.2M

WHITE MOUNTAINS INSURANCE GROUP LTD

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
WHITE MOUNTAINS INSURANCE GROUP LTD17.9M$231.2MHeld
BlackRock, Inc.3.55M$46MHeld
Vanguard2.57M$33.3MHeld
JPMORGAN CHASE & CO1.37M$17.7MHeld
Clearline Capital LP1.3M$16.9MHeld
Renaissance Technologies1.05M$13.5MHeld
MORGAN STANLEY960.2K$12.4M$1.37MAdded$2.51M
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP855.9K$11.1MHeld
Divisadero Street Capital Management, LP849K$11MHeld
Icahn Capital804.1K$10.4MHeld
J. Goldman & Co LP786.4K$10.2MHeld
GEODE CAPITAL MANAGEMENT, LLC777.3K$10.1MHeld
MILLENNIUM MANAGEMENT LLC751.7K$9.74MHeld
State Street731.4K$9.47MHeld
VICTORY CAPITAL MANAGEMENT INC729.5K$9.45MHeld
GOLDMAN SACHS GROUP INC729.4K$9.45MHeld
JACOBS ASSET MANAGEMENT, LLC705.3K$9.13MHeld
JACOBS LEVY EQUITY MANAGEMENT, INC700.5K$9.07MHeld
Nuveen, LLC666.5K$8.63MHeld
Shay Capital LLC591K$7.65MHeld
G2 Investment Partners Management LLC496.9K$6.44MHeld
D. E. Shaw & Co., Inc.397.4K$5.15MHeld
JANE STREET GROUP, LLC360.1K$4.66MHeld
FRANKLIN RESOURCES INC328.7K$4.26MHeld
MARSHALL WACE, LLP328.4K$4.25MHeld
DIMENSIONAL FUND ADVISORS LP319.8K$4.14MHeld
Qube Research & Technologies Ltd284K$3.68MHeld
CHARLES SCHWAB INVESTMENT MANAGEMENT INC279.8K$3.62MHeld
Triad Investment Management275.4K$3.57MHeld
BNP PARIBAS FINANCIAL MARKETS273.2K$3.54MHeld
NORTHERN TRUST CORP267.3K$3.46MHeld
JANUS HENDERSON GROUP PLC265.9K$3.44MHeld
Pacer Advisors, Inc.263K$3.41MHeld
Y-Intercept (Hong Kong) Ltd210.4K$2.72MHeld
Stoic Point Capital Management LLC207.3K$2.68MHeld
Balyasny Asset Management L.P.184.2K$2.38MHeld
Citadel169.6K$2.2MHeld
PDT Partners, LLC165.5K$2.14MHeld
CANADA PENSION PLAN INVESTMENT BOARD136.5K$1.77MHeld
Squarepoint Ops LLC124.3K$1.61MHeld
Man Group plc110.9K$1.44MHeld
BOOTHBAY FUND MANAGEMENT, LLC108.1K$1.4MHeld
BARCLAYS PLC91.4K$1.18M$134.8KAdded$207.1K
Russell Investments Group, Ltd.90.8K$1.18MHeld
XTX Topco Ltd90.7K$1.17MHeld
IEQ CAPITAL, LLC88.1K$1.14MHeld
Bank of New York Mellon Corp87.3K$1.13MHeld
TUDOR INVESTMENT CORP ET AL83.3K$1.08MNew
NOMURA HOLDINGS INC82.3K$1.07MHeld
Lighthouse Investment Partners, LLC82K$1.06MHeld
SEI INVESTMENTS CO81.8K$1.06MHeld
ExodusPoint Capital Management, LP81.8K$1.06MHeld
SUSQUEHANNA INTERNATIONAL GROUP, LLP81K$1.05MHeld
GLOBEFLEX CAPITAL L P80.2K$1.04MHeld
Allianz Asset Management GmbH70.2K$908.8KHeld
Mariner, LLC69.9K$905.4KHeld
LOS ANGELES CAPITAL MANAGEMENT LLC72.3K$884KHeld
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC65.1K$842.9KHeld
BLAIR WILLIAM & CO/IL60.1K$778.9KHeld
TWO SIGMA INVESTMENTS, LP59.9K$775.2KHeld
UBS Group AG59.7K$773KHeld
Swiss National Bank58.7K$760.2KHeld
Amundi58.6K$759.1KHeld
BANK OF AMERICA CORP /DE/58.2K$753.2K$91.3KCut−$180.8K
RAYMOND JAMES FINANCIAL INC52.7K$682.6KHeld
RHUMBLINE ADVISERS48.5K$628.4KHeld
STATE OF WISCONSIN INVESTMENT BOARD46.8K$606.6KHeld
MACKENZIE FINANCIAL CORP43K$558.9KHeld
Quantinno Capital Management LP42.7K$553.6KHeld
Allspring Global Investments Holdings, LLC43K$513.3KHeld
Verition Fund Management LLC39.3K$509KHeld
Gotham Asset Management, LLC39.1K$506.6KHeld
State of Wyoming38.8K$502.9KHeld
AlphaQuest LLC37.5K$485.1KHeld
WELLS FARGO & COMPANY/MN37.1K$480.1KHeld
PRINCIPAL FINANCIAL GROUP INC35.4K$458.5KHeld
PharVision Advisers, LLC34K$440.7KHeld
ALLIANCEBERNSTEIN L.P.33.9K$439.4KHeld
Legal & General Group Plc33.8K$437.9KHeld
DEUTSCHE BANK AG\31.6K$409.7KHeld
Versor Investments LP29.3K$379.7KHeld
TWO SIGMA ADVISERS, LP26.9K$348.3KHeld
FOX RUN MANAGEMENT, L.L.C.26K$337.2KHeld
Invesco Ltd.26K$337KHeld
Cannell & Spears LLC25.6K$330.9KHeld
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM25.5K$330.3KHeld
Creative Planning25.3K$327.3KHeld
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC26.4K$313.3KHeld
Graham Capital Management, L.P.23.4K$303.4KHeld
Brookwood Investment Group LLC22.8K$295.8KHeld
MANGROVE PARTNERS IM, LLC22.7K$294KHeld
MetLife Investment Management, LLC21.4K$277.2KHeld
Cerity Partners LLC20.8K$269.1KHeld
Point72 Asset Management, L.P.18.8K$242.8KHeld
Zurcher Kantonalbank (Zurich Cantonalbank)18.6K$241.4KHeld
Jump Financial, LLC18.5K$240.1KHeld
VIRGINIA RETIREMENT SYSTEMS ET Al17.7K$229.2KHeld
MERCER GLOBAL ADVISORS INC /ADV17K$219.6KHeld
VARCOV Co.16.5K$214.2KHeld
Engineers Gate Manager LP16.1K$208.8KHeld
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.15.8K$204.1KHeld
Cornerstone Investment Partners, LLC14.7K$189.7KHeld
CAXTON ASSOCIATES LLP13.9K$180.3KHeld
Pallas Capital Advisors LLC13.2K$170.6KHeld
Moran Wealth Management, LLC12.7K$164.7KHeld
Voleon Capital Management LP12.3K$159.6KHeld
Polymer Capital Management (US) LLC12.3K$159.4KHeld
Cresset Asset Management, LLC12.3K$158.8K$19.3KAdded$17.1K
Brooklyn Investment Group12K$153.9KHeld
TEACHER RETIREMENT SYSTEM OF TEXAS11K$142.2KHeld
INTECH INVESTMENT MANAGEMENT LLC10.8K$139.8KHeld
MANUFACTURERS LIFE INSURANCE COMPANY, THE10.8K$139.6KHeld
VIRTUS ADVISERS, LLC10.6K$137.6K$16.7KCut−$75.4K
State of Tennessee, Department of Treasury12.9K$132KHeld
Police & Firemen's Retirement System of New Jersey9.69K$125.5KHeld
CITIGROUP INC8.29K$107.4KHeld
ROYAL BANK OF CANADA6.52K$85KHeld
NEW YORK STATE COMMON RETIREMENT FUND6.26K$81.1KHeld
Essential Partners LLC5.94K$76.9K$8.96KAdded$12K
KLP KAPITALFORVALTNING AS5.93K$76.8KHeld
Fidelity4.83K$62.5KHeld
SIMPLEX TRADING, LLC3.88K$50.2KHeld
STRS OHIO3.8K$49.2KHeld
Ameritas Investment Partners, Inc.3.03K$39.2KHeld
Rockefeller Capital Management L.P.2.81K$36.3KHeld
GROUP ONE TRADING LLC2.33K$30.2KHeld
JONES FINANCIAL COMPANIES LLLP2.31K$30KHeld
Quarry LP2.3K$29.7KHeld
Tower Research Capital LLC (TRC)2.18K$28.2KHeld
EverSource Wealth Advisors, LLC2.04K$26.5KHeld
FEDERATED HERMES, INC.1.32K$17.1KHeld
Allworth Financial LP1.26K$16.3K$1.53KAdded$5.26K
OSAIC HOLDINGS, INC.1.13K$14.6KHeld
Arax Advisory Partners1.1K$14.2KHeld
Aster Capital Management (DIFC) Ltd987$12.8KHeld
MEEDER ASSET MANAGEMENT INC714$9.25KHeld
IFP Advisors, Inc708$9.17K$512Added$5.46K
ACADIAN ASSET MANAGEMENT LLC606.2K$7.84KHeld
US BANCORP \DE\503$6.51KHeld
Murphy & Mullick Capital Management Corp500$6.47KHeld
ROTHSCHILD INVESTMENT LLC340$4.4KHeld
True Wealth Design, LLC336$4.35KHeld
Optiver Holding B.V.270$3.5KHeld
Marquette Asset Management, LLC243$3.15KHeld
Sterling Capital Management LLC217$2.81KHeld
NISA INVESTMENT ADVISORS, LLC201$2.6KHeld
Farther Finance Advisors, LLC187$2.42KHeld
GAMMA Investing LLC187$2.42KHeld
HRT FINANCIAL LP109K$1.41KHeld
SageView Advisory Group, LLC90$1.17KHeld
Parallel Advisors, LLC84$1.09KHeld
TUCKER ASSET MANAGEMENT LLC83$1.07KNew
Versant Capital Management, Inc78$1.01KHeld
PNC Financial Services Group, Inc.75$971Held
Caitong International Asset Management Co., Ltd47$609Held
GSA CAPITAL PARTNERS LLP46.8K$606Held
Smartleaf Asset Management LLC44$573Held
CWM, LLC42.3K$548Held
SIGNATUREFD, LLC39$505Held
Thrivent Financial for Lutherans36.4K$471Held
PRICE T ROWE ASSOCIATES INC /MD/31K$402Held
SJS Investment Consulting Inc.24$311Held
SG Americas Securities, LLC15.8K$205Held
Clearstead Advisors, LLC15$195Held
MAI Capital Management14$182Held
Sunbelt Securities, Inc.14$181Held
American Capital Advisory, LLC4$52Held
Covestor Ltd3.39K$44Held
State of Alaska, Department of Revenue1.86K$24Held
AMALGAMATED BANK1.06K$14Held
BNP PARIBAS ASSET MANAGEMENT Holding S.A.594$8Held
Capital Advisors, Ltd. LLC12$0Held

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.