COPANO ENERGY L L C

CUSIP: 217202100 Class: COM UNITS

TETRAD CORP's Holding History (CIK: 0000883597)

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

Q2 2008

Shares 49,700 Value ($000) $1,677 Avg Close — Range —

Q1 2008

Shares 49,700 Value ($000) $1,699 Avg Close — Range —

Q4 2007

Shares 49,700 Value ($000) $1,807 Avg Close — Range —

Q3 2007

Shares 49,700 Value ($000) $1,825 Avg Close — Range —

Q2 2007

Shares 22,900 Value ($000) $977 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2008	49,700	$1,677	—	—
Q1 2008	49,700	$1,699	—	—
Q4 2007	49,700	$1,807	—	—
Q3 2007	49,700	$1,825	—	—
Q2 2007	22,900	$977	—	—