As Russia continues to occupy Crimea, Ukraine's debt to Russia haunts its financial markets and business climate with uncertainty. 

"Business plans have been at a standstill and the volume of sales for many companies has been declining," Morgan Williams, president and CEO of the U.S.-Ukraine Business Council, told the International Business Times. 

Many large U.S. companies, including Deere & Company (NYSE:DE), Mary Kay Inc. and oil giants, do business in Ukraine. Here are 10 of them:

Eli Lilly and Co. (NYSE:LLY): Market Cap: $66.55 billion

Lilly conducts clinical medical research and manufactures pharmaceuticals.

Headquarters: Indianapolis, Indiana

The Boeing Company (NYSE:BA): Market Cap: $93.42 billion

Boeing is the world’s largest aerospace company, a manufacturer of commercial jets and defense, space and security systems and a top U.S. exporter.

Headquarters: Chicago

Intel Corporation (Nasdaq INTC): Market Cap: $123.11 billion

Intel makes semiconductor chips and is on the world’s largest and highest valued in the business based on revenue.

Headquarters: Santa Clara, California

Philip Morris International, Inc. (NYSE:PM): Market Cap: $125 billion

Philip Morris is a global cigarette and tobacco company, with a significant share of the international cigarette market.

Headquarters: New York, New York

Visa Inc. (NYSE:V): Market Cap: $143.26 billion

Visa is a financial services company.

Headquarters: Foster City, California

Citigroup Inc. (NYSE:C): Market Cap: $147.06 billion

Citi is a financial services firm or bank with 200 years of experience.

Headquarters: New York, New York

The Coca-Cola Company (NYSE:KO): Market Cap: $169.6 billion

Coca-Cola makes soft drinks and markets them across the world.

Headquarters: Atlanta

International Business Machines Corp. (NYSE:IBM): Market Cap: $194.48 billion

IBM manufactures and markets computer software and hardware and offers infrastructure, hosting and consulting services for technology.

Headquarters: Armonk, New York

Chevron Corporation (NYSE:CVX): Market Cap: $218.61 billion

Chevron is the largest American oil and gas company behind Exxon, with operations in oil and natural gas exploration, refineries, trading and distribution.

Headquarters: San Ramon, California

ExxonMobil Corporation (NYSE:XOM): Market Cap: $406.24 billion

Exxon is the world’s largest publicly traded oil and gas company with operations from exploring to drilling to refining, and it is one of the highest valued companies in the world.

Headquarters: Irving, Texas