NATIONAL GRID PLC

CUSIP: 636274300 Class: SPONSORED ADR NE

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q1 2017
Shares 165,369 Value ($000) $10,498 Avg Close — Range —
Q4 2016
Shares 162,698 Value ($000) $9,490 Avg Close — Range —
Q3 2016
Shares 162,699 Value ($000) $11,569 Avg Close — Range —
Q2 2016
Shares 158,131 Value ($000) $11,754 Avg Close — Range —
Q1 2016
Shares 158,131 Value ($000) $11,294 Avg Close — Range —
Q4 2015
Shares 158,131 Value ($000) $10,996 Avg Close — Range —
Q3 2015
Shares 158,131 Value ($000) $11,011 Avg Close — Range —
Q2 2015
Shares 153,048 Value ($000) $9,882 Avg Close — Range —
Q1 2015
Shares 153,048 Value ($000) $9,888 Avg Close — Range —
Q4 2014
Shares 156,048 Value ($000) $11,026 Avg Close — Range —
Q3 2014
Shares 213,048 Value ($000) $15,314 Avg Close — Range —
Q2 2014
Shares 213,031 Value ($000) $15,845 Avg Close — Range —
Q1 2014
Shares 213,031 Value ($000) $14,644 Avg Close — Range —
Q4 2013
Shares 213,031 Value ($000) $13,915 Avg Close — Range —
Q3 2013
Shares 213,031 Value ($000) $12,579 Avg Close — Range —
Q2 2013
Shares 205,854 Value ($000) $11,666 Avg Close — Range —