The federal government has awarded more than $107 billion in contract payments, grants and other benefits over the past decade to foreign and multinational American companies while they were doing business in Iran, despite Washington’s efforts to discourage investment there, records show. 

That includes nearly $15 billion paid to companies that defied American sanctions law by making large investments that helped Iran develop its vast oil and gas reserves.

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Beyond $102 billion in United States government contract payments since 2000 — to do everything from building military housing to providing platinum to the United States Mint — the companies and their subsidiaries have reaped a variety of benefits. They include nearly $4.5 billion in loans and loan guarantees from the Export-Import Bank, a federal agency that underwrites the export of American goods and services, and more than $500 million in grants for work that includes cancer research and the turning of agricultural byproducts into fuel.