YAMANA GOLD INC

CUSIP: 98462Y100 Class: COM

TETRAD CORP's Holding History (CIK: 0000883597)

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

Q3 2011
Shares 44,300 Value ($000) $605 Avg Close — Range —
Q2 2011
Shares 40,000 Value ($000) $465 Avg Close — Range —
Q1 2011
Shares 40,000 Value ($000) $492 Avg Close — Range —
Q4 2010
Shares 40,000 Value ($000) $512 Avg Close — Range —