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|Traded as||NASDAQ: PACW|
|Founded||Chevy Chase, Maryland (2000)|
|James J. Pieczynski,
CapitalSource is a commercial lender that is a division of Pacific Western Bank and provides senior debt loans of $5 million to $100 million to middle-market companies throughout the United States. The company targets specific industries in its portfolio of holdings, particularly focusing on technology, real estate, healthcare, security, small business, golf finance, and equipment leasing companies. With $16 billion in assets and 80 full-service branches located throughout the state of California. Pacific Western Bank is a wholly owned subsidiary of PacWest Bancorp 
CapitalSource is often referred to as an on-balance sheet lender because its loans are originated, underwritten and managed internally. The majority of its loans are in three categories: first mortgage, cash-flow, and asset-based loans.
CapitalSource was founded in 2000 by now-Congressman John Delaney (D-MD) and Jason Fish with an initial capitalization of more than $500 million, which at the time was the largest private capitalization for a finance company.
In 2003, CapitalSource completed an IPO and began trading on the New York Stock Exchange (NYSE) under the symbol CSE. In 2006, CapitalSource completed its conversion to a Real Estate Investment Trust (REIT), which enabled the company to remain competitive in a highly liquid market due to the tax benefits of REIT status.
In 2009, CapitalSource completed its revocation of REIT status. Today the company operates as a C-Corp, as it did prior to 2006.
CapitalSource was briefly involved in a controversial hotel project which also involved rapper Jay-Z and developer Andre Balazs, but CapitalSource stepped out of the project when they sold the property note to another developer at a loss.
CapitalSource Bank was involved in another newsworthy property issue in 2010 when they foreclosed upon a high-end Manhattan project under development. The ‘’’Manhattan Blue’’’ condominium building had initial interest from Leonardo DiCaprio, but the developers failed to sell enough units to make payments to CapitalSource.
In early 2012, CapitalSource moved its headquarters to Los Angeles.
In 2013, the Washington Post identified CapitalSource as a major lender to Aeon Financial, a secretive company that aggressively purchases tax liens and charges homeowners "excessive," "unreasonable," and "extraordinarily high" in order to avoid foreclosure.
CapitalSource was acquired by PacWest Bancorp in July 2013 for around $2.29 billion. The merger received final regulatory approval on April 1, 2014. In the agreement, CapitalSource, trading as CSE, ceased to trade at market close on April 7, 2014. Existing CapitalSource shareholders received a combination of cash and a fixed exchange ratio of PACW shares.
In April 2014, Pacific Western Bank and CapitalSource merged to form what is now the 6th largest publicly traded commercial bank headquartered in California, with more than $16 billion in assets.
CapitalSource Bank played a central role in the founding of the Elder Financial Protection Network (EFPN), and the California State Legislature presented CapitalSource Bank with a Certificate of Recognition for helping to launch and maintain it. Gary Dunn, Capital Source Bank’s VP CRA, is a member of the Board of Directors for EFPN, serving as Treasurer. CapitalSource Bank was awarded a Bank Enterprise Award from the Community Development Financial Institutions Fund by the U.S. Treasury Department for its investment in low-income and economically distressed communities in California in 2010.
- Dan Freed, "The Street," October 13, 2009,"
- Washington Business Journal (October 31, 2008). "CapitalSource to rid REIT status in 2009". Retrieved October 21, 2010.
- Anton Troianovski (May 10, 2010). "Plans for 14th Street Hotel Go Nowhere". Wall Street Journal. Retrieved October 25, 2010.
- Craig Karmin (August 5, 2010). "Foreclosure Buyer Gets Hudson Blue". Wall Street Journal. Retrieved October 25, 2010.
- Washington Business Journal (July 31, 2012). "CapitalSource has quietly moved its headquarters to Los Angeles". Retrieved January 10, 2013.
- The Washington Post http://www.washingtonpost.com/sf/investigative/2013/12/08/debt-collecting-machine/?hpid=z1#home. Missing or empty
- Reuters (23 July 2013). "Deals of the day -- mergers and acquisitions". Reuters.
- CapitalSource Bank. "CapitalSource Bank Community Reinvestment". Archived from the original on 2011-07-06. Retrieved 2010-10-22.
- Elder Financial Protection Network. "Board of Directors EFPN". Archived from the original on 2010-10-26. Retrieved 2010-10-22.
- U.S. Treasury Department. "CDFI Fund Awards Nearly $25 Million to Institutions for Increasing Lending and Investment in Economically Distressed Communities". Archived from the original on 2010-10-22.
- U.S. Treasury Department. "Community Development Financial Institutions Fund 2010 BEA Award List" (PDF). Archived from the original (PDF) on 2011-10-16.