NISKA GAS STORAGE US/CAN

CUSIP: 654679AB5 Class: CORP

ADVENT CAPITAL MANAGEMENT /DE/'s Holding History (CIK: 0001097278)

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

Q3 2013
Shares 7,953,000 Value ($000) $8,231 Avg Close — Range —
Q2 2013
Shares 10,974,000 Value ($000) $11,386 Avg Close — Range —