Source: Australian Government Register of Lobbyists (a 10-firm curated seed — see methodology). 25 firms match current filters.
About coverage: the federal lobbyist register (lobbyists.ag.gov.au) is a JavaScript-rendered application that can't be scraped server-side in its current form, so this directory is a 10-firm curated seed of well-known Canberra lobbying firms, not the full federal register. Registration and deregistration dates aren't available from this seed and are shown as not on record.
About politician contacts and donation links: these are drawn from declared contact records and AEC donation disclosures matched to lobbying clients by company name. Most donation links resolve through a donation made to a politician's party, then attributed to every politician in that party — not a donation to that specific politician. See each firm's profile for the direct-vs-party breakdown.