13F

Stock

MediaAlpha, Inc.

MAX · held by 161 managers

Reported value

$431.5M

Holders

161

+29 new · −42 exited

Holders’ est. mark

−$137.4M

Price effect on 126 books still in the name

Largest holder

$166.1M

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$166.1M−$65.2MCut−$65.2M
BlackRock, Inc.3.48M$32.3M−$12.7MCut−$13.7M
Clearline Capital LP2.59M$24.1M−$4.75MAdded$7.24M
JPMORGAN CHASE & CO1.75M$16.5M−$4.8MCut−$1.24M
VANGUARD CAPITAL MANAGEMENT LLC1.39M$12.9MHeld
J. Goldman & Co LP1.18M$11M−$2.87MAdded$815.4K
GEODE CAPITAL MANAGEMENT, LLC1.07M$9.95M−$2.84MCut−$114.5K
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP1.06M$9.88M−$3.12MCut−$1.21M
JACOBS ASSET MANAGEMENT, LLC924.4K$8.6M−$2.57MCut−$536.3K
State Street838.2K$7.79M−$2.67MCut−$1.68M
Shay Capital LLC775K$7.21M−$2.16MCut−$445.9K
JACOBS LEVY EQUITY MANAGEMENT, INC750.1K$6.98M−$2.56MCut−$2.1M
Renaissance Technologies719.3K$6.69M−$2.63MCut−$6.85M
MORGAN STANLEY703K$6.54M−$2.57MCut−$5.9M
Nuveen, LLC701.4K$6.52M−$2.43MCut−$2.11M
GOLDMAN SACHS GROUP INC623.4K$5.8M−$2.28MCut−$3.65M
DIMENSIONAL FUND ADVISORS LP620.7K$5.77M−$1.17MAdded$1.63M
VANGUARD PORTFOLIO MANAGEMENT LLC546.7K$5.08MHeld
Icahn Capital482K$4.48M−$1.76MCut−$5.93M
Philadelphia Financial Management of San Francisco, LLC480K$4.46MNew
Qube Research & Technologies Ltd415.3K$3.86M−$1.04MAdded$184.1K
FRANKLIN RESOURCES INC343.7K$3.2M−$1.2MCut−$1.06M
D. E. Shaw & Co., Inc.342.1K$3.18M−$1.25MCut−$1.96M
Triad Investment Management333.9K$3.1M−$1.01MCut−$462K
ALLIANCEBERNSTEIN L.P.205.4K$2.66M−$1Added$2.22M
JANE STREET GROUP, LLC283K$2.63M−$1.03MCut−$2.03M
BANK OF AMERICA CORP /DE/279.7K$2.6M−$212.3KAdded$1.85M
CHARLES SCHWAB INVESTMENT MANAGEMENT INC274.3K$2.55M−$1MCut−$1.07M
NORTHERN TRUST CORP271.8K$2.53M−$975.6KCut−$933.3K
Citadel229.3K$2.13M−$619.2KCut−$64.2K
VANGUARD FIDUCIARY TRUST CO227.1K$2.11MHeld
Stoic Point Capital Management LLC221K$2.06M−$756.6KCut−$628.8K
Squarepoint Ops LLC215.5K$2M−$453.7KAdded$395K
SUSQUEHANNA INTERNATIONAL GROUP, LLP189.7K$1.76M−$295.6KAdded$715.7K
TEACHER RETIREMENT SYSTEM OF TEXAS185.3K$1.72M−$40.1KAdded$1.58M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC180.5K$1.68M−$237.6KAdded$835.9K
TWO SIGMA INVESTMENTS, LP175.3K$1.63M−$218.5KAdded$855K
Y-Intercept (Hong Kong) Ltd158.2K$1.47M−$577.3KCut−$1.25M
UBS Group AG153.9K$1.43M−$217.9KAdded$658.1K
Caption Management, LLC149K$1.39MNew
XTX Topco Ltd146.8K$1.37M−$331.1KAdded$191K
PRINCIPAL FINANCIAL GROUP INC137.6K$1.28M−$129.2KAdded$821.3K
Man Group plc136.7K$1.27M−$404.7KCut−$164.5K
Balyasny Asset Management L.P.108.8K$1.01M−$397.1KCut−$1.37M
Quantinno Capital Management LP107.3K$997.6K−$156KAdded$444.1K
STATE OF WISCONSIN INVESTMENT BOARD106.2K$987.3K−$171KAdded$380.7K
PDT Partners, LLC90K$837.2K−$328.6KCut−$1.31M
VICTORY CAPITAL MANAGEMENT INC87.3K$811.6K−$318.5KCut−$8.63M
Bank of New York Mellon Corp87K$808.7K−$317.4KCut−$322K
Divisadero Street Capital Management, LP86.9K$808.2K−$317.2KCut−$10.2M
Russell Investments Group, Ltd.84.9K$794K−$307.8KCut−$385K
GLOBEFLEX CAPITAL L P80.2K$746.2K−$292.8KCut−$292.9K
Amundi78.1K$726.4K−$213.9KCut−$32.7K
Allianz Asset Management GmbH70.2K$652.6K−$256.1KCut−$256.1K
Swiss National Bank58.7K$545.9K−$214.3KCut−$214.3K
Mariner, LLC58.5K$544K−$213.7KCut−$361.5K
BNP PARIBAS FINANCIAL MARKETS56.2K$522.7K−$205.2KCut−$3.01M
BLAIR WILLIAM & CO/IL56K$520.6K−$204.3KCut−$258.3K
RHUMBLINE ADVISERS47.9K$445.3K−$174.8KCut−$183K
MILLENNIUM MANAGEMENT LLC47K$437.5K−$171.7KCut−$9.3M
Allspring Global Investments Holdings, LLC47.9K$434.8K−$123.3KCut−$78.5K
BARCLAYS PLC45.4K$421.9K−$165.6KCut−$762.1K
Dynamic Technology Lab Private Ltd43.6K$405.4KNew
State of Wyoming43K$399.9K−$141.7KCut−$103K
Brooklyn Investment Group39.7K$369.4K−$41.9KAdded$215.6K
Vanguard Global Advisers, LLC37.7K$350.5KHeld
FOX RUN MANAGEMENT, L.L.C.37K$348.9K−$91.4KAdded$11.7K
SEI INVESTMENTS CO35.7K$332.4K−$130.4KCut−$727.5K
DEUTSCHE BANK AG\35.1K$326.3K−$115.5KCut−$83.4K
IEQ CAPITAL, LLC32.9K$306.2K−$120.2KCut−$835.2K
Quantbot Technologies LP29.1K$270.8KNew
Legal & General Group Plc27.5K$256.1K−$100.5KCut−$181.9K
Fidelity27.2K$252.7K−$17.6KAdded$190.2K
Bridgefront Capital, LLC26.2K$243.4KNew
Abel Hall, LLC25.4K$236.4KNew
Cannell & Spears LLC25.4K$236.2K−$92.7KCut−$94.7K
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM25.3K$234.8K−$92.2KCut−$95.4K
LOS ANGELES CAPITAL MANAGEMENT LLC23.7K$220.8K−$69.6KCut−$663.3K
Invesco Ltd.23.6K$219.7K−$86.2KCut−$117.3K
ELKHORN PARTNERS LIMITED PARTNERSHIP23K$213.9KNew
CWM, LLC22.4K$208.6K$208.3KAdded$208K
MetLife Investment Management, LLC21.4K$199K−$78.1KCut−$78.1K
JUPITER ASSET MANAGEMENT LTD21.2K$196.9KNew
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC20.9K$195.8K−$52.1KCut−$117.5K
State of Tennessee, Department of Treasury20.7K$192.8K−$12KAdded$60.8K
Creative Planning19.9K$185.5K−$72.8KCut−$141.8K
Cornerstone Investment Partners, LLC19K$176.8K−$53.5KCut−$12.9K
Zurcher Kantonalbank (Zurich Cantonalbank)18.6K$173.4K−$68KCut−$68K
AMERIPRISE FINANCIAL INC17.8K$165.6KNew
EVENTIDE ASSET MANAGEMENT, LLC17.5K$165.3KNew
VANGUARD ASSET MANAGEMENT, Ltd17.4K$162.1KHeld
MERCER GLOBAL ADVISORS INC /ADV16.2K$150.2K−$59KCut−$69.4K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.16.1K$150K−$57.5KCut−$54K
Campbell & CO Investment Adviser LLC16.1K$149.6KNew
nVerses Capital, LLC15.8K$146.8KNew
Corient Private Wealth LLC15.6K$144.7KNew
Cerity Partners LLC15K$139.8K−$54.9KCut−$129.3K
Graham Capital Management, L.P.14.5K$135.3K−$53.1KCut−$168.1K
MACKENZIE FINANCIAL CORP14.3K$132.9K−$52.9KCut−$425.9K
Schonfeld Strategic Advisors LLC13.9K$129.4KNew
JANUS HENDERSON GROUP PLC13.9K$129.1K−$50.5KCut−$3.31M
GLENMEDE TRUST CO NA13.2K$122.3KNew
WELLS FARGO & COMPANY/MN12.3K$114.6K−$45KCut−$365.5K
Mach-1 Financial Group, LLC12K$111.2KNew
Cresset Asset Management, LLC11.4K$106K−$41.6KCut−$52.8K
BANK OF MONTREAL /CAN/10.5K$97.6KNew
Aaron Wealth Advisors LLC10.2K$95.3KNew
Jefferies Financial Group Inc.10K$93KNew
CITIGROUP INC9.98K$92.8K−$30.3KCut−$14.6K
Police & Firemen's Retirement System of New Jersey9.69K$90.1K−$35.4KCut−$35.4K
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO9.1K$84.6KNew
Vanguard Investments Australia, Ltd.7.01K$65.2KHeld
SIMPLEX TRADING, LLC6.85K$63.7K−$14.1KAdded$13.5K
Essential Partners LLC6.46K$60K−$21.7KCut−$16.9K
NEW YORK STATE COMMON RETIREMENT FUND6.26K$58.3K−$22.9KCut−$22.9K
KLP KAPITALFORVALTNING AS5.93K$55.2K−$21.7KCut−$21.7K
ROYAL BANK OF CANADA5.74K$53K−$21.8KCut−$32K
Rockefeller Capital Management L.P.3.13K$29.1K−$10.2KCut−$7.24K
Tower Research Capital LLC (TRC)3.09K$28.7K−$7.95KAdded$517
Ameritas Investment Partners, Inc.3.03K$28.1K−$11KCut−$11K
EverSource Wealth Advisors, LLC1.26K$11.7K−$4.6KCut−$14.8K
Arax Advisory Partners1.17K$10.9K−$4.01KCut−$3.33K
Allworth Financial LP1.1K$10.3K−$4.03KCut−$6.05K
OSAIC HOLDINGS, INC.1.04K$9.64K−$3.79KCut−$4.98K
Private Wealth Asset Management, LLC1K$9.3KNew
Versant Capital Management, Inc999$9.29K−$285Added$8.28K
ACADIAN ASSET MANAGEMENT LLC847.2K$7.87K−$2.21KAdded$26
SUMMIT SECURITIES GROUP LLC557$5.18KNew
Murphy & Mullick Capital Management Corp500$4.65K−$1.82KCut−$1.82K
SPEECE THORSON CAPITAL GROUP INC499K$4.64KNew
FEDERATED HERMES, INC.472$4.39K−$1.72KCut−$12.7K
GAMMA Investing LLC446$4.15K−$683Added$1.73K
HUNTINGTON NATIONAL BANK397$3.69KNew
Parallel Advisors, LLC376$3.5K−$307Added$2.41K
HRT FINANCIAL LP329.3K$3.06K−$397Added$1.65K
Farther Finance Advisors, LLC248$2.25K−$724Cut−$170
ROTHSCHILD INVESTMENT LLC237$2.2K−$865Cut−$2.2K
Optiver Holding B.V.230$2.14K−$839Cut−$1.36K
Sterling Capital Management LLC217$2.02K−$792Cut−$792
Marquette Asset Management, LLC198$1.84K−$722Cut−$1.3K
GROUP ONE TRADING LLC185$1.72K−$676Cut−$28.4K
US BANCORP \DE\182$1.69K−$664Cut−$4.82K
Root Financial Partners, LLC139$1.29KNew
NISA INVESTMENT ADVISORS, LLC135$1.26K−$492Cut−$1.35K
PNC Financial Services Group, Inc.135$1.26K−$273Added$285
IFP Advisors, Inc134$1.25K−$489Cut−$7.92K
GSA CAPITAL PARTNERS LLP109.3K$1.02K−$171Added$410
Caitong International Asset Management Co., Ltd105$976−$172Added$367
ALGERT GLOBAL LLC84.5K$786New
Wealth Preservation Advisors, LLC66$614New
JONES FINANCIAL COMPANIES LLLP57$517−$221Cut−$29.4K
Investors Portfolio Services LLC61$515New
True Wealth Design, LLC51$475−$186Cut−$3.88K
Smartleaf Asset Management LLC44$415−$158Cut−$158
PRICE T ROWE ASSOCIATES INC /MD/37.1K$345−$113Cut−$57
MAI Capital Management25$233−$52Added$51
SG Americas Securities, LLC19.5K$181−$58Cut−$24
SJS Investment Consulting Inc.9$84−$33Cut−$227
Covestor Ltd3.45K$32−$13Cut−$12
State of Alaska, Department of Revenue1.86K$17−$7Cut−$7
NEW YORK STATE TEACHERS RETIREMENT SYSTEM100$1New

Who left

Positions as of Q1 2026. 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.