| Publisher | Established on | Week of establishment | Week of establishment, Monday as starting day of week | Week of establishment, Tuesday as starting day of week |
|---|---|---|---|---|
| Jex Max Publication | 1969-12-25 | 51 | 52 | 51 |
| BPP Publication | 1985-10-01 | 39 | 40 | 39 |
| New Harrold Publication | 1975-09-05 | 35 | 36 | 35 |
| Ultra Press Inc. | 1948-07-10 | 27 | 28 | 27 |
| Mountain Publication | 1975-01-01 | 0 | 1 | 52 |
| Summer Night Publication | 1990-12-10 | 49 | 50 | 49 |
| Pieterson Grp. of Publishers | 1950-07-15 | 28 | 28 | 28 |
| Novel Publisher Ltd. | 2000-01-01 | 0 | 0 | 52 |