PATTERSON UTI ENERGY INC

Ticker: PTEN CUSIP: 703481101 Class: Common Stock

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q1 2019
Shares 51,241 Value ($000) $718 Avg Close $13.11 Range $9.85 - $14.79
Q4 2018
Shares 56,851 Value ($000) $588 Avg Close $14.74 Range $9.49 - $18.24
Q3 2018
Shares 48,536 Value ($000) $830 Avg Close $17.18 Range $14.60 - $19.29
Q2 2018
Shares 45,466 Value ($000) $818 Avg Close $20.05 Range $16.61 - $23.99
Q1 2018
Shares 50,324 Value ($000) $881 Avg Close $20.88 Range $16.82 - $25.03
Q4 2017
Shares 35,379 Value ($000) $814 Avg Close $20.72 Range $17.24 - $23.26
Q3 2017
Shares 31,444 Value ($000) $658 Avg Close $18.42 Range $14.83 - $21.74
Q2 2017
Shares 20,875 Value ($000) $421 Avg Close $21.79 Range $19.06 - $25.75
Q1 2017
Shares 22,149 Value ($000) $538 Avg Close $26.97 Range $22.83 - $29.76
Q4 2016
Shares 16,201 Value ($000) $436 Avg Close $24.70 Range $20.79 - $29.56
Q3 2016
Shares 19,545 Value ($000) $437 Avg Close $20.07 Range $17.61 - $22.66
Q2 2016
Shares 19,183 Value ($000) $409 Avg Close $18.84 Range $16.06 - $22.12
Q1 2016
Shares 23,632 Value ($000) $416 Avg Close $14.91 Range $10.94 - $18.75
Q4 2015
Shares 27,102 Value ($000) $409 Avg Close $15.38 Range $12.82 - $17.45
Q3 2015
Shares 43,159 Value ($000) $567 Avg Close $15.85 Range $12.97 - $18.80