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

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.