SCHLUMBERGER LTD

Ticker: SLB CUSIP: 806857108 Class: COM STK

DUDLEY & SHANLEY, INC.'s Holding History (CIK: 0000883511)

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

Q1 2014

Shares 187,850 Value ($000) $18,315 Avg Close $65.48 Range $61.94 - $71.41

Q4 2013

Shares 187,050 Value ($000) $16,855 Avg Close $65.05 Range $61.32 - $68.30

Q3 2013

Shares 187,450 Value ($000) $16,563 Avg Close $58.98 Range $51.50 - $64.56

Q2 2013

Shares 180,850 Value ($000) $12,960 Avg Close $52.90 Range $49.31 - $55.56

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	187,850	$18,315	$65.48	$61.94 - $71.41
Q4 2013	187,050	$16,855	$65.05	$61.32 - $68.30
Q3 2013	187,450	$16,563	$58.98	$51.50 - $64.56
Q2 2013	180,850	$12,960	$52.90	$49.31 - $55.56