SELECT ENERGY SVCS INC

Ticker: WTTR CUSIP: 81617J301 Class: Common Stock

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q1 2021

Shares 99,893 Value ($000) $497 Avg Close — Range —

Q1 2019

Shares 39,178 Value ($000) $471 Avg Close — Range —

Q1 2018

Shares 22,200 Value ($000) $280 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	99,893	$497	—	—
Q1 2019	39,178	$471	—	—
Q1 2018	22,200	$280	—	—