Antitrust Radar

Participant observatory

Market participant atlas

Explore the firms, products, services, and aggregate categories named in published market data. Shares and comparisons apply only within their stated market and observation period.

Latest source-labeled share

Participant positions inside bounded markets

x = latest share
circle = observations

Latest participant share by measured market

Fifty-five source-labeled participants plotted within eight separate market lanes. Horizontal position is latest reported share, circle size represents the number of observed years, color indicates whether the label is a firm, product or service, or aggregate, and every point opens a participant dossier.

Search enginesHHI 7,359 / lead 85.2%
Mobile operating systemsHHI 5,337 / lead 63.1%
Social referralsHHI 4,995 / lead 68.9%
AI assistantsHHI 4,804 / lead 67.1%
BrowsersHHI 3,612 / lead 50.0%
Beef meatpackingHHI unavailable / lead 85.0%
Domestic airlinesHHI unavailable / lead 17.8%
Rental housingHHI unavailable / lead 22.0%
FirmProduct or serviceAggregate or residual
Participant profiles
5510 firms / 36 products / 9 aggregate
Share observations
1621980-2026
Measured markets
836 longitudinal labels
Operator labels
2028 official attributions
Source-labeled entityEach profile preserves the exact firm, product, service, or residual label used by its underlying evidence.
Within-market onlyCompare points inside one lane. Definitions, geographies, denominators, and source years can differ across lanes.

Participant lens

Reported share across measured markets

Every point is a sourced share in its own market. Compare positions within a row; market definitions and denominators can differ across rows.

1Visible0Firms0Products1Markets
Participant kind
FirmProduct or serviceAggregate or residual

Horizontal position = latest reported share

Beef meatpacking

HHI unavailable
Four largest beef packers85.0%

Four largest beef packers

Aggregate or residual

Beef meatpacking / 2019 / U.S. Department of Agriculture Economic Research Service

Share85.0%Rank#1Latest change+4.00 ppOpen profile

These profiles describe source-labeled market participants, not legal entities or findings of market power. Shares only apply to the stated market definition, geography, denominator, and year.