A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 1
| Hanakat (5) | Hankkija-Maatalous Oy (10) |
| Helen Sahkoverkko Oy (5) | Helsingin Energia (35) |
| Hewlett-Packard Company (9) | Hoivanet Oy (13) |
| HOK-Elanto (44) | Holiday Club Resorts Oy (5) |
| HP (5) | HR Yhtiot (37) |