NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q2 2018
Shares 74,193 Value ($000) $4,734 Avg Close — Range —
Q1 2018
Shares 72,610 Value ($000) $4,186 Avg Close — Range —
Q4 2017
Shares 71,425 Value ($000) $4,261 Avg Close — Range —
Q3 2017
Shares 62,210 Value ($000) $4,006 Avg Close — Range —
Q2 2017
Shares 61,050 Value ($000) $3,654 Avg Close — Range —
Q1 2017
Shares 61,153 Value ($000) $3,614 Avg Close — Range —
Q4 2016
Shares 44,849 Value ($000) $2,682 Avg Close — Range —
Q3 2016
Shares 46,248 Value ($000) $2,780 Avg Close — Range —
Q2 2016
Shares 45,463 Value ($000) $2,947 Avg Close — Range —
Q1 2016
Shares 53,966 Value ($000) $2,906 Avg Close — Range —
Q4 2015
Shares 49,151 Value ($000) $2,488 Avg Close — Range —
Q3 2015
Shares 48,166 Value ($000) $2,208 Avg Close — Range —
Q2 2015
Shares 47,041 Value ($000) $1,984 Avg Close — Range —
Q1 2015
Shares 47,991 Value ($000) $2,301 Avg Close — Range —
Q4 2014
Shares 46,491 Value ($000) $2,320 Avg Close — Range —
Q3 2014
Shares 45,807 Value ($000) $1,935 Avg Close — Range —
Q2 2014
Shares 45,607 Value ($000) $2,150 Avg Close — Range —
Q1 2014
Shares 45,369 Value ($000) $1,997 Avg Close — Range —
Q4 2013
Shares 47,029 Value ($000) $2,014 Avg Close — Range —
Q3 2013
Shares 49,859 Value ($000) $2,093 Avg Close — Range —
Q2 2013
Shares 50,335 Value ($000) $2,138 Avg Close — Range —