Ownership

The ownership commands work on the monthly KSEI register of holders above 1% (“Pemegang Saham di Atas 1%”) that IDX publishes for every listed company. idx keeps it in a local SQLite database, so queries are instant and work offline.

Get the data

idx ownership sync

This downloads a maintained snapshot (a few MB, currently the latest three months) and installs it. Run it again any time: it does nothing when you are already current, and it never replaces a database holding more history than the snapshot. idx ownership releases lists the months you have.

Queries

idx ownership ticker BBCA               # holders of one stock, with concentration
idx ownership entity "ANTHONI SALIM"    # every holding of one investor
idx ownership search salim              # find investor names
idx ownership changes --from 2026-08-31 --to 2026-09-30
idx ownership concentration --top 20    # most concentrated stocks (by HHI)
idx ownership cross-holders --min-tickers 3
idx ownership graph BBCA --depth 2      # ownership network; --format dot for Graphviz

changes lists holders that are new, exited, increased or decreased between two releases. ticker also reports concentration: the top holder’s share, the top three, the Herfindahl index (HHI) and the free float (shares held by holders below 1%).

Import reports yourself

The snapshot covers most needs. To load a month it lacks, or older history, import IDX’s reports directly:

idx ownership discover                     # find the latest report URLs on IDX
idx ownership import --url <xlsx-or-pdf>   # needs curl-impersonate
idx ownership import --file report.xlsx    # or a local XLSX, PDF, ZIP or TXT

Since June 2026 IDX publishes the register as XLSX; earlier months were PDF announcements, which need mutool. See helper tools.

Entity names

The register spells some investors differently from month to month. idx ownership resolve lists unresolved names and lets you map an alias to an entity or merge two entities.