NICOR INC

CUSIP: 654086107 Class: COM

RATIONAL ADVISORS LLC's Holding History (CIK: 0001143565)

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

Q4 2010
Shares 56,000 Value ($000) $2,796 Avg Close — Range —
Q1 2010
Shares 24,000 Value ($000) $1,006 Avg Close — Range —
Q3 2009
Shares 16,500 Value ($000) $604 Avg Close — Range —