| Filed | Form | Description | |
|---|---|---|---|
| 11/12/25 | S-4 | S-4 | → |
Longevity may refer to especially long-lived members of a population, whereas life expectancy is defined statistically as the average number of years remaining at a given age. For example, a population's life expectancy at birth is the same as the average age at death for all people born in the same year.