NEW YORK ( TheStreet) -- There are now 156 undercapitalized institutions on the TheStreet's Bank Watch List, with preliminary first-quarter data now available for roughly 96% of the nation's banks and thrifts. Based on first-quarter regulatory data supplied by SNL Financial for the nation's banks and savings and loan associations -- and factoring-in 18 bank and thrift failures since TheStreet's previous Watch List was published on February 23 -- 156 institutions were undercapitalized according to the regulatory guidelines that apply to most institutions. Click the link below to see the full list: >>>Bank Watch List It is important to note that any capital raised by institutions during the second quarter of 2011 will not be reflected on the Watch List. Most banks and thrifts need to maintain Tier 1 leverage, Tier 1 risk-based and total risk-based capital ratios of at least 5%, 6% and 10% to be considered well-capitalized under regulatory guidelines. Some trust banks carry lower capital requirements. The ratios need to be at least 4%, 4% and 8% for most to be considered adequately capitalized. Thrift institutions added to the Watch List this week include SCB Bank of Shelbyville, Ind., which is a subsidiary of Blue River Bancshares ( BRBI). SCB slipped to undercapitalized following a fourth-quarter net loss of $10.7 million, losing another $1 million during the first quarter. Atlantic Bank and Trust of Charleston, S.C., and American Eagle Savings Bank of Upper Chichester, Pa., also joined the Watch List, with first-quarter data now available. Coastal Bank of Cocoa Beach, Fla., which failed last Friday, was not on the preliminary first-quarter Watch List, since first-quarter regulatory data for the institution was not made available. The largest bank on the preliminary first-quarter Watch List is Integra Bank, NA of Evansville, Ind., which had $2.2 billion in total assets as of March 31, and has been operating under an Office of the Comptroller of the Currency consent order since July 2010, under which it agreed to achieve and maintain a Tier 1 leverage ratio of at least 9% and a total risk-based capital ratio of at least 12%. SNL Financial reported that the OCC didn't accept a capital restoration plan submitted by the institution in March, and was therefore considered "significantly undercapitalized" by the regulator.