Rule
13p-1 requires disclosure of certain information when a company manufactures or contracts to manufacture products for which the minerals specified in the Rule are necessary to the functionality or production of those products. The specified
minerals are gold, columbite-tantalite (coltan), cassiterite and wolframite, including their derivatives, which are limited to tantalum, tin and tungsten (the “Conflict Minerals”). The “Covered Countries” for the purposes of the
Rule 13p-1 are the Democratic Republic of the Congo, the Republic of the Congo, the Central African Republic, south Sudan, Uganda, Rwanda, Burundi, Tanzania, Zambia and Angola. The Company’s Purification Solutions segment manufactures and sells
equipment systems that include ready-made electronic component parts purchased from third party vendors. Certain of these component parts contain Conflict Minerals which are necessary to the functionality of the parts and, in turn, the equipment
systems. Sales from these equipment systems represents substantially less than 1% of the Company’s net sales and operating revenues, and the cost of the electronic components used in the systems represents substantially less than 0.1% of
Cabot’s total cost of sales.