# 100 Jane Street L.P.

Business profile: public business information with links to supporting state records. Data as of October 16, 2026.

- Legal business name: 100 Jane Street L.P.
- Alternative and DBA names: William Street Partners L.P.
- Entity type: LP
- Original incorporation date: January 2, 1990
- Time in business: 36 years and 9 months
- Jurisdiction count: 2

## All known addresses

- 309 E 45th St, New York, NY 10017 (listed in New York)

## Registered states

- [Delaware](https://index.baselayer.com/de/b23a71f0ba7a62f7)
- [New York](https://index.baselayer.com/ny/635b3f6362b0c363): Foreign registration

Source: public state registration records. Missing values are not a negative finding.

Cite as: Baselayer Business Index (https://index.baselayer.com/business/b23a71f0ba7a62f7)