NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

NORRIS PERNE & FRENCH LLP/MI's Holding History (CIK: 0001092290)

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

Q2 2016
Shares 3,625 Value ($000) $235 Avg Close — Range —
Q1 2016
Shares 3,985 Value ($000) $215 Avg Close — Range —
Q4 2015
Shares 4,195 Value ($000) $212 Avg Close — Range —