0001132716-21-000001.txt : 20210212 0001132716-21-000001.hdr.sgml : 20210212 20210212160654 ACCESSION NUMBER: 0001132716-21-000001 CONFORMED SUBMISSION TYPE: 13F-HR/A PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20191231 FILED AS OF DATE: 20210212 DATE AS OF CHANGE: 20210212 EFFECTIVENESS DATE: 20210212 FILER: COMPANY DATA: COMPANY CONFORMED NAME: UBS OCONNOR LLC CENTRAL INDEX KEY: 0001132716 IRS NUMBER: 061569842 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR/A SEC ACT: 1934 Act SEC FILE NUMBER: 028-06327 FILM NUMBER: 21627248 BUSINESS ADDRESS: STREET 1: ONE NORTH WACKER DRIVE 31ST FLOOR CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3125256000 MAIL ADDRESS: STREET 1: ONE NORTH WACKER DRIVE 31ST FLOOR CITY: CHICAGO STATE: IL ZIP: 60606 13F-HR/A 1 primary_doc.xml 13F-HR/A LIVE false false true 0001132716 XXXXXXXX 12-31-2019 12-31-2019 true 3 NEW HOLDINGS true 12-31-2020 12-31-2019 Confidential Treatment Expired UBS OCONNOR LLC

ONE NORTH WACKER DRIVE 31ST FLOOR CHICAGO IL 60606

13F HOLDINGS REPORT 028-06327 N Charles Mathys (312) 525-4114 Charles Mathys Chicago IL 02-12-2021 0 1 160119 INFORMATION TABLE 2 ubsocQ419_A3infotable.xml TD AMERI COM 87236Y108 160119000 3221718 SH DFND 3221718 0 0