15. 花旗集團（Citigroup）

財富美國五百強排名：20

2011年盈利：111億美元

????花旗集團的盈利比上年增長4%，達到110億美元。你完全有理由認為他們今年成績不錯，但如果回顧2006年時的花旗集團，當(dāng)時的盈利是在210億美元左右，你就知道與當(dāng)時相比還是有一些差距的。

16. 伯克希爾哈撒韋公司（Berkshire Hathaway）

Citigroup

Fortune 500 rank: 20

2011 profit: $11.1 billion

????Citigroup's profits were up by 4%, to $11 billion, from the year before. It's safe to say they had a good year, but when you look back at 2006, when Citi pulled in roughly $21 billion, you realize they have some ground to cover.

Berkshire Hathaway

財富美國五百強排名：7

2011年盈利：103億美元

????盡管伯克希爾?哈撒韋公司從去年的第10名降至今年的第16名，但2011年對他們來說依然是值得慶賀的一年。公司的所有主要業(yè)務(wù)都成績不俗，旗下的五家最大的非保險類公司伊斯卡金屬制品公司（Iscar）、路博潤公司（Lubrizol）、馬蒙集團（Marmon）和中美能源公司（MidAmerican Energy）都收獲了破紀(jì)錄的營業(yè)收益。

????然而伯克希爾?哈撒韋也并非一帆風(fēng)順。公司曾花費20億美元投資未來能源控股公司（Energy Future Holdings）債券，最終遭受巨額損失。

????公司還有若干項曾經(jīng)如日中天的業(yè)務(wù)因房地產(chǎn)市場波動而遭到嚴(yán)重影響。克萊頓房屋公司（Clayton Homes）是美國最大的房屋制造商，在去年美國房屋建設(shè)總量中只占到約7%。

17. 輝瑞制藥公司（Pfizer）

財富美國五百強排名：40

2011年盈利：100億美元

????在輝瑞公司的拳頭產(chǎn)品降膽固醇藥立普妥（Lipitor）專利到期之后，很多人都對輝瑞能否保持其全球最大制藥公司的地位持懷疑態(tài)度。2011年，由于專利到期，公司承受了50億美元的損失，但仍然排在盈利能力最強公司排名榜的第17位。

????在今年上榜的所有公司里，輝瑞公司是與2010年相比收入變化最小的，只有0.02%。然而，公司將總收益的28.7%回饋給股東，是上榜公司中股東回報率最高的公司之一。

Fortune 500 rank: 7

2011 profit: $10.3 billion

????Even though Berkshire Hathaway slipped from No. 10 in last year's most profitable list to No. 16 this year, they still had plenty to celebrate in 2011. All of the company's major businesses performed well, with each of their five largest non-insurance companies -- Iscar, Lubrizol, Marmon Group, and MidAmerican Energy -- delivering record operating earnings.

????It wasn't all smooth sailing for Berkshire Hathway, though. The company spent about $2 billion in bonds of Energy Future Holdings, which ended up as a big loss.

????It also hasn't helped that several of Berkshire's businesses are significantly influenced by fluctuations in the housing market, which has certainly seen better days. Clayton Homes, the largest producer of homes in the country, accounted for about 7% of all homes constructed in the U.S. last year.

Pfizer

Fortune 500 rank: 40

2011 profit: $10.0 billion

????After the expiration of its patent for rockstar cholesterol drug Lipitor, many wonder whether Pfizer can hold onto its status as the world's largest drug maker. The company sustained $5 billion in losses related to the patent expiration in 2011, but they still managed to land at No. 17 on our list of most profitable companies.

????Among all companies on this year's most profitable list, Pfizer experienced the smallest change in revenue from 2010, at .02%. And the company delivered a 28.7% total return to shareholders, one of the largest returns in this year's cohort.