USEC INC

CUSIP: 90333EAC2 Class: NOTE

TETRAD CORP's Holding History (CIK: 0000883597)

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

Q3 2011
Shares 500,000 Value ($000) $264 Avg Close — Range —
Q2 2011
Shares 500,000 Value ($000) $359 Avg Close — Range —