NYSE EURONEXT

CUSIP: 629491101 Class: COM

GATEWAY INVESTMENT ADVISERS LLC's Holding History (CIK: 0001114618)

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

Q3 2013
Shares 309,384 Value ($000) $12,988 Avg Close — Range —
Q2 2013
Shares 307,894 Value ($000) $12,747 Avg Close — Range —