NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q3 2018
Shares 43,810 Value ($000) $2,931 Avg Close — Range —
Q2 2018
Shares 43,812 Value ($000) $2,795 Avg Close — Range —
Q1 2018
Shares 43,304 Value ($000) $2,496 Avg Close — Range —
Q4 2017
Shares 44,822 Value ($000) $2,674 Avg Close — Range —
Q3 2017
Shares 45,438 Value ($000) $2,926 Avg Close — Range —
Q2 2017
Shares 50,348 Value ($000) $3,013 Avg Close — Range —
Q1 2017
Shares 53,478 Value ($000) $3,161 Avg Close — Range —
Q4 2016
Shares 56,078 Value ($000) $3,353 Avg Close — Range —
Q3 2016
Shares 57,578 Value ($000) $3,461 Avg Close — Range —
Q2 2016
Shares 57,078 Value ($000) $3,700 Avg Close — Range —
Q1 2016
Shares 58,049 Value ($000) $3,126 Avg Close — Range —
Q4 2015
Shares 50,700 Value ($000) $2,566 Avg Close — Range —
Q3 2015
Shares 49,820 Value ($000) $2,284 Avg Close — Range —
Q2 2015
Shares 49,920 Value ($000) $2,106 Avg Close — Range —
Q1 2015
Shares 49,666 Value ($000) $2,381 Avg Close — Range —
Q4 2014
Shares 50,566 Value ($000) $2,523 Avg Close — Range —
Q3 2014
Shares 50,052 Value ($000) $2,115 Avg Close — Range —
Q2 2014
Shares 49,568 Value ($000) $2,337 Avg Close — Range —
Q1 2014
Shares 48,968 Value ($000) $2,155 Avg Close — Range —
Q4 2013
Shares 48,768 Value ($000) $2,088 Avg Close — Range —
Q3 2013
Shares 48,468 Value ($000) $2,035 Avg Close — Range —
Q2 2013
Shares 46,961 Value ($000) $1,995 Avg Close — Range —
Q1 2013
Shares 46,639 Value ($000) $2,044 Avg Close — Range —