NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

Advisors Asset Management, Inc.'s Holding History (CIK: 0001297376)

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

Q2 2016
Shares 2,586 Value ($000) $168 Avg Close — Range —
Q1 2016
Shares 3,018 Value ($000) $163 Avg Close — Range —
Q4 2015
Shares 3,299 Value ($000) $167 Avg Close — Range —
Q3 2015
Shares 3,607 Value ($000) $165 Avg Close — Range —
Q2 2015
Shares 3,892 Value ($000) $164 Avg Close — Range —
Q1 2015
Shares 4,204 Value ($000) $202 Avg Close — Range —
Q4 2014
Shares 2,949 Value ($000) $147 Avg Close — Range —
Q3 2014
Shares 222 Value ($000) $9 Avg Close — Range —