NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

Empirical Financial Services, LLC d.b.a. Empirical Wealth Management's Holding History (CIK: 0001510434)

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

Q3 2018
Shares 4,030 Value ($000) $270 Avg Close — Range —
Q2 2018
Shares 4,030 Value ($000) $257 Avg Close — Range —
Q1 2018
Shares 4,030 Value ($000) $232 Avg Close — Range —