NATIONAL GRID PLC

CUSIP: 636274300 Class: SPONSORED ADR NE

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

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

Q4 2013
Shares 55,181 Value ($000) $3,605 Avg Close — Range —
Q3 2013
Shares 55,181 Value ($000) $3,259 Avg Close — Range —
Q2 2013
Shares 53,324 Value ($000) $3,022 Avg Close — Range —