129 of its 274 returns name at least one TD or Senator; 49 different members are named in all.
- Mary ButlerFFFianna Fáil TD · Waterford36 returns6 in the last 12 months
- John CumminsFGFine Gael TD · Waterford35 returns7 in the last 12 months
- David CullinaneSFSinn Féin TD · Waterford35 returns2 in the last 12 months
- Paschal DonohoeFGFine Gael TD · Dublin Central · no longer a member29 returns1 in the last 12 months
- Simon HarrisFGFine Gael TD · Wicklow24 returns2 in the last 12 months
- Darragh O'BrienFFFianna Fáil TD · Dublin Fingal East20 returns2 in the last 12 months
- Micheál MartinFFFianna Fáil TD · Cork South-Central14 returns4 in the last 12 months
- Jack ChambersFFFianna Fáil TD · Dublin West8 returns2 in the last 12 months
Counts are returns published on the Register of Lobbying that name the member, up to 28 Sept 2026; the last 12 months run from 29 Sept 2025. A return names a member when the lobbyist reports contacting them. It says who was lobbied, not what was asked or what they did. Only officials described as a TD, Senator or Minister whose name matches exactly one member are counted, so every figure is a minimum. How records are linked