NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

NEW YORK STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0000314969)

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

Q3 2018
Shares 77,311 Value ($000) $5,172 Avg Close — Range —
Q2 2018
Shares 77,311 Value ($000) $4,932 Avg Close — Range —
Q1 2018
Shares 77,311 Value ($000) $4,457 Avg Close — Range —
Q4 2017
Shares 77,311 Value ($000) $4,612 Avg Close — Range —
Q3 2017
Shares 77,311 Value ($000) $4,979 Avg Close — Range —
Q2 2017
Shares 77,311 Value ($000) $4,627 Avg Close — Range —
Q1 2017
Shares 80,011 Value ($000) $4,729 Avg Close — Range —
Q4 2016
Shares 80,111 Value ($000) $4,791 Avg Close — Range —
Q3 2016
Shares 79,911 Value ($000) $4,803 Avg Close — Range —
Q2 2016
Shares 79,911 Value ($000) $5,180 Avg Close — Range —
Q1 2016
Shares 77,311 Value ($000) $4,163 Avg Close — Range —
Q4 2015
Shares 77,311 Value ($000) $3,913 Avg Close — Range —
Q3 2015
Shares 77,311 Value ($000) $3,544 Avg Close — Range —
Q2 2015
Shares 77,311 Value ($000) $3,261 Avg Close — Range —
Q1 2015
Shares 77,311 Value ($000) $3,707 Avg Close — Range —
Q4 2014
Shares 77,311 Value ($000) $3,858 Avg Close — Range —
Q3 2014
Shares 77,311 Value ($000) $3,266 Avg Close — Range —
Q2 2014
Shares 77,311 Value ($000) $3,645 Avg Close — Range —
Q1 2014
Shares 77,311 Value ($000) $3,402 Avg Close — Range —
Q4 2013
Shares 78,011 Value ($000) $3,340 Avg Close — Range —
Q3 2013
Shares 82,011 Value ($000) $3,443 Avg Close — Range —
Q2 2013
Shares 83,511 Value ($000) $3,548 Avg Close — Range —