WILLIAMS PARTNERS L P

CUSIP: 96950F104 Class: COM UNIT L P

MOUNT VERNON ASSOCIATES INC /MD/'s Holding History (CIK: 0000799003)

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

Q1 2015
Shares 15,099 Value ($000) $743 Avg Close — Range —
Q4 2014
Shares 11,725 Value ($000) $525 Avg Close — Range —
Q3 2014
Shares 10,525 Value ($000) $558 Avg Close — Range —
Q2 2014
Shares 9,650 Value ($000) $524 Avg Close — Range —
Q1 2014
Shares 10,450 Value ($000) $532 Avg Close — Range —
Q4 2013
Shares 10,100 Value ($000) $514 Avg Close — Range —
Q3 2013
Shares 9,900 Value ($000) $524 Avg Close — Range —
Q2 2013
Shares 9,700 Value ($000) $501 Avg Close — Range —