ABRAXAS PETE CORP

CUSIP: 003830106 Class: COM

TETRAD CORP's Holding History (CIK: 0000883597)

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

Q1 2013
Shares 141,600 Value ($000) $327 Avg Close — Range —
Q4 2012
Shares 141,600 Value ($000) $310 Avg Close — Range —
Q3 2012
Shares 141,600 Value ($000) $326 Avg Close — Range —
Q2 2012
Shares 141,600 Value ($000) $452 Avg Close — Range —
Q1 2012
Shares 124,600 Value ($000) $389 Avg Close — Range —
Q4 2011
Shares 117,000 Value ($000) $386 Avg Close — Range —
Q3 2011
Shares 117,000 Value ($000) $309 Avg Close — Range —
Q2 2011
Shares 100,000 Value ($000) $383 Avg Close — Range —
Q1 2011
Shares 100,000 Value ($000) $584 Avg Close — Range —
Q4 2010
Shares 100,000 Value ($000) $457 Avg Close — Range —