NATIONAL GRID PLC

Ticker: NGG CUSIP: 636274409 Class: SPONSORED ADR NE

TRILLIUM ASSET MANAGEMENT, LLC's Holding History (CIK: 0000884541)

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

Q4 2017

Shares 39,577 Value ($000) $2,328 Avg Close — Range —

Q3 2017

Shares 47,483 Value ($000) $2,978 Avg Close — Range —

Q2 2017

Shares 49,460 Value ($000) $3,107 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	39,577	$2,328	—	—
Q3 2017	47,483	$2,978	—	—
Q2 2017	49,460	$3,107	—	—