SENTINEL ENERGY SVCS INC

CUSIP: G8062D128 Class: UNIT

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

Note: Option positions (PUT/CALL) are excluded.

Q1 2018
Shares 303,070 Value ($000) $3,006 Avg Close — Range —
Q4 2017
Shares 1,106,336 Value ($000) $11,030 Avg Close — Range —