NATIONAL GRID PLC

CUSIP: 636274300 Class: SPONSORED ADR NE

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q1 2015
Shares 7,377 Value ($000) $477 Avg Close — Range —
Q4 2014
Shares 6,647 Value ($000) $470 Avg Close — Range —
Q2 2013
Shares 8,001 Value ($000) $453 Avg Close — Range —