0000902219-18-000212 SC 13G 1 20180208 20180208 2U, Inc. 0001459417 7372 262335939 DE 1231 SC 13G 34 005-88512 18583943 7900 HARKINS ROAD LANHAM MD 20706 (301) 892-4350 7900 HARKINS ROAD LANHAM MD 20706 2tor, Inc. 20090324 WELLINGTON MANAGEMENT GROUP LLP 0000902219 0000 042683227 MA 1231 SC 13G C/O WELLINGTON MANAGEMENT COMPANY LLP 280 CONGRESS STREET BOSTON MA 02210 6179515000 C/O WELLINGTON MANAGEMENT COMPANY LLP 280 CONGRESS STREET BOSTON MA 02210 WELLINGTON MANAGEMENT CO LLP 19960930 WELLINGTON MANAGEMENT CO 19930426 SC 13G 1 SEC13G_Filing.htm SEC SCHEDULE 13G