AP
This news follows an August report from CNBC that Square was trying to raise $200 million total, at least partially from the Government of Singapore Investment Corporation. Square didn't list any stock buyers on the filing seen by Fortune, and it's unclear whether Square plans to raise another $100 million.
Generally, it's been a tough year for Square, between a mix of bad press and increasing competition. Amazon recently launched a new card reader device that undercuts Square on transaction fees, and Apple just entered the mobile payments arena generally with Apple Pay.
Business Insider reached out to Square for comment.