Data infrastructure / open access
Public data catalog
Download the records behind the research, including market shares, concentration measures, official events, and source references. Coverage and missing values are documented for each dataset.
Source records move through market definitions, concentration calculations, confidence labels, and public data endpoints — 45 source records, 12 market profiles, 235809 record rows plus a 1 row summary endpoint across 62 API endpoints.
Record rows
235,809
Sources
45
Endpoints
62
Aug 15, 2026
Latest source review
62
Dataset families
4
Source types
Market-definition atlas
What market is this metric measuring?
Inspect each product boundary, geography, denominator, proxy choice, and permitted comparison use before treating concentration values as economic evidence.
Selected definition contract
U.S. pharmacy benefit management
Product boundary
Pharmacy benefit management services represented by prescription processing
Geographic boundary
United States
Measurement basis
FTC-reported aggregate shares of prescriptions processed
Denominator
U.S. prescriptions processed by the PBMs covered in the FTC public findings
Included
Top-three and top-six aggregate concentration facts
Excluded
Individual PBM shares sufficient to construct a complete firm distribution
Method and limitations
Publish the FTC aggregate concentration facts and withhold HHI until individual citable PBM shares are available.
Top-three and top-six aggregates do not identify the individual firm shares needed to calculate HHI.
Boundary source
Pharmacy Benefit Managers: The Powerful Middlemen Inflating Drug Costs and Squeezing Main Street Pharmacies
Federal Trade Commission · accessed 2026-05-16
Open data needs public interpretation.
The API is a starting point, not a legal conclusion. Pair downloads with methodology notes, source records, and the data-gaps report when citing market concentration.