NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

HUNTINGTON NATIONAL BANK's Holding History (CIK: 0000049205)

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

Q2 2012
Shares 8 Value ($000) $0 Avg Close — Range —
Q1 2012
Shares 177 Value ($000) $2 Avg Close — Range —
Q4 2011
Shares 495 Value ($000) $7 Avg Close — Range —
Q3 2011
Shares 495 Value ($000) $6 Avg Close — Range —
Q2 2011
Shares 495 Value ($000) $8 Avg Close — Range —
Q1 2011
Shares 1,392 Value ($000) $25 Avg Close — Range —
Q4 2010
Shares 1,392 Value ($000) $26 Avg Close — Range —
Q3 2010
Shares 1,392 Value ($000) $21 Avg Close — Range —
Q2 2010
Shares 1,821 Value ($000) $28 Avg Close — Range —
Q1 2010
Shares 1,821 Value ($000) $29 Avg Close — Range —
Q4 2009
Shares 1,821 Value ($000) $34 Avg Close — Range —
Q3 2009
Shares 3,094 Value ($000) $54 Avg Close — Range —
Q2 2009
Shares 3,877 Value ($000) $51 Avg Close — Range —
Q1 2009
Shares 6,132 Value ($000) $56 Avg Close — Range —