| Rank | Name | Age | Source | Net Worth |
|---|---|---|---|---|
| 7777 | Pallonji Mistry | 8787 | Construction | $14.3bn14.3 |
| 215215 | John Grayken | 6060 | Private Equity | $6.60bn6.6 |
| 348348 | Denis O'Brien | 5858 | Telecom | $4.7bn4.7 |
| 745745 | John Dorrance III, | 7373 | Campbell Soup | $2.7bn2.7 |
| 1,0301030 | Dermot Desmond | 6666 | Finance | $2bn2 |
| 1,2341234 | Martin Naughton | 7777 | Heating equipment | $1.70bn1.7 |
| 1,7951795 | John Collison | 2626 | Stripe | $1.1bn1.1 |
| 1,7951795 | Patrick Collison | 2828 | Stripe | $1.1bn1.1 |
