| Rank | Name | Market Cap | Price | Today | Price (30 days) | Country | |
|---|---|---|---|---|---|---|---|
 | 1 |  | £1.95 B | £6.32 | 2.41% | 🇮🇸 Iceland | |
| 2 |  | £1.66 B | £3.78 | 0.00% | 🇮🇸 Iceland | |
| 3 |  | £1.45 B | £1.04 | 0.87% | 🇮🇸 Iceland | |
| 4 |  | £1.36 B | £0.73 | 0.00% | 🇮🇸 Iceland | |
| 5 |  | £0.79 B | £0.43 | 1.40% | 🇮🇸 Iceland | |
| 6 |  | £0.74 B | £0.66 | 0.00% | 🇮🇸 Iceland | |
| 7 |  | £0.67 B | £0.35 | 0.87% | 🇮🇸 Iceland | |
| 8 |  | £0.56 B | £1.80 | 1.37% | 🇮🇸 Iceland | |
| 9 |  | £0.52 B | £0.11 | 0.83% | 🇮🇸 Iceland | |
| 10 |  | £0.49 B | £0.70 | 0.43% | 🇮🇸 Iceland | |
| 11 |  | £0.44 B | £0.71 | 0.00% | 🇮🇸 Iceland | |
| 12 |  | £0.44 B | £0.28 | 0.87% | 🇮🇸 Iceland | |
| 13 |  | £0.40 B | £0.23 | 0.40% | 🇮🇸 Iceland | |
| 14 |  | £0.37 B | £2.28 | 0.00% | 🇮🇸 Iceland | |
| 15 |  | £0.32 B | £0.007787 | 0.79% | 🇮🇸 Iceland | |
| 16 |  | £0.31 B | £0.11 | 0.00% | 🇮🇸 Iceland | |
| 17 |  | £0.28 B | £0.08334 | 0.00% | 🇮🇸 Iceland | |
|
|
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| 18 |  | £0.25 B | £2.12 | 0.00% | 🇮🇸 Iceland | |
| 19 |  | £0.22 B | £7.29 | 2.83% | 🇮🇸 Iceland | |
| 20 |  | £0.19 B | £0.10 | 0.00% | 🇮🇸 Iceland | |
| 21 |  | £0.19 B | £0.07756 | 0.00% | 🇮🇸 Iceland | |
| 22 |  | £0.17 B | £0.08917 | 0.00% | 🇮🇸 Iceland | |
| 23 |  | £0.16 B | £0.15 | 2.48% | 🇮🇸 Iceland | |
| 24 |  | £0.11 B | £3.56 | 0.00% | 🇮🇸 Iceland | |
| 25 |  | £0.10 B | £0.02969 | 0.41% | 🇮🇸 Iceland | |
| 26 |  | £95.07 M | £0.03103 | 2.00% | 🇮🇸 Iceland | |
| 27 |  | £45.79 M | £0.18 | 1.30% | 🇮🇸 Iceland | |
| 28 |  | £10.1 M | £0.004380 | 4.00% | 🇮🇸 Iceland | |
| 29 |  | £9.73 M | £0.01825 | 0.00% | 🇮🇸 Iceland | |
| 30 |  | £6.54 M | £0.009125 | 0.00% | 🇮🇸 Iceland | |
This is the list of the largest companies in Iceland by market capitalization. Only the top companies with headquarters in Iceland are shown in this list.