NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

GRIFFIN ASSET MANAGEMENT, INC.'s Holding History (CIK: 0000883803)

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

Q2 2019
Shares 40,000 Value ($000) $2,780 Avg Close — Range —
Q1 2019
Shares 40,000 Value ($000) $2,625 Avg Close — Range —
Q4 2018
Shares 40,000 Value ($000) $2,418 Avg Close — Range —
Q3 2018
Shares 40,000 Value ($000) $2,676 Avg Close — Range —
Q2 2018
Shares 40,000 Value ($000) $2,552 Avg Close — Range —
Q1 2018
Shares 40,000 Value ($000) $2,306 Avg Close — Range —
Q4 2017
Shares 40,000 Value ($000) $2,386 Avg Close — Range —
Q3 2017
Shares 40,000 Value ($000) $2,576 Avg Close — Range —
Q2 2017
Shares 40,000 Value ($000) $2,394 Avg Close — Range —