* Comments: 

CGIFF: operates in three business segments: Sulphur Products and Performance Chemicals (SPPC), Pulp Chemicals and International operations. The SPPC segment manufactures and distributes sulphuric acid and other sulphur based products to customer base in Canada and the United States and provides acid regeneration services to the petroleum industry, primarily in the United States Gulf Coast area. SPPC also supplies liquid and powder sodium hydrosulphite, which is sold to the pulp and paper industry. Pulp Chemicals produces sodium chlorate and crude tall oil (CTO). International operations provide removal and marketing services for elemental sulphur and sulphuric acid.

CXUSF: an unincorporated open-ended trust. The Fund owns 100% of Canexus Limited. As of December 31, 2009, the Fund held a 34.2% indirect interest, through its wholly owned subsidiary Canexus Commercial Trust, in Canexus LP and Nexen Inc. (Nexen) held a 65.8% controlling interest in Canexus LP. Canexus LP, through its various direct and indirect subsidiaries, produces sodium chlorate and chlor-alkali products in several plants located in Canada and one in South America, for the pulp and paper and water treatment industries. Canexus LP's Canadian sodium chlorate production facilities located in Beauharnois, Quebec; Brandon, Manitoba and Nanaimo, British Columbia, and a chlor-alkali production facility located in North Vancouver, British Columbia. Canexus LP's South American sodium chlorate and chloralkali production facility is located in Espirito Santo, Brazil. The Fund is administered by Canexus Limited, a wholly owned subsidiary of the Fund.

WPZ: a limited partnership formed by The Williams Companies, Inc. (Williams). The Company was formed to own, operate and acquire a portfolio of energy assets. The Gas Pipeline segment includes the interstate natural gas pipelines and pipeline joint venture investments. The Midstream Gas and Liquids segment includes the natural gas gathering, treating and processing business. On February 17, 2010, the Company closed a transaction with its general partners, its operating company, Williams and certain subsidiaries of Williams, pursuant to which Williams contributed to the ownership interests in the entities that make up Williams' Gas Pipeline and Midstream Gas & Liquids business segments, to the extent not already owned by the Company, including Williams' limited and general partner interests in WMZ, but excluding Williams' Canadian, Venezuelan and olefin operations and 25.5% of Gulfstream Natural Gas System, L.L.C. (Gulfstream).