NATIONAL GRID PLC

CUSIP: B08SNH908 Class: COMMON

Aperio Group, LLC's Holding History (CIK: 0001364615)

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

Q1 2014
Shares 107,541 Value ($000) $1,473 Avg Close — Range —
Q4 2013
Shares 107,541 Value ($000) $1,402 Avg Close — Range —