Sterling Bancshares 425 Business combination disclosure

Filed by Comerica Incorporated

Pursuant to Rule 425 under the Securities Act of 1933

Subject Company: Sterling Bancshares, Inc.

(Commission File No. 1-34768)

The following document is filed herewith pursuant to Rule 425 under the Securities Act of 1933:

·Press Release of Comerica Incorporated dated July 19, 2011

Any statements in this filing that are not historical facts are forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Words such as “anticipates,” “believes,” “feels,” “expects,” “estimates,” “seeks,” “strives,” “plans,” “intends,” “outlook,” “forecast,” “position,” “target,” “mission,” “assume,” “achievable,” “potential,” “strategy,” “goal,” “aspiration,” “opportunity,” “initiative,” “outcome,” “continue,” “remain,” “maintain,” “trend,” “objective,” “pending,” “looks forward” and variations of such words and similar expressions, or future or conditional verbs such as “will,” “would,” “should,” “could,” “might,” “can,” “may” or similar expressions, as they relate to Comerica or its management, are intended to identify forward-looking statements. These forward-looking statements are predicated on the beliefs and assumptions of Comerica’s management based on information known to Comerica’s management as of the date of this filing and do not purport to speak as of any other date. Forward-looking statements may include descriptions of plans and objectives of Comerica’s management for future or past operations, products or services, and forecasts of Comerica’s revenue, earnings or other measures of economic performance, including statements of profitability, business segments and subsidiaries, estimates of credit trends and global stability. Such statements reflect the view of Comerica’s management as of this date with respect to future events and are subject to risks and uncertainties. Should one or more of these risks materialize or should underlying beliefs or assumptions prove incorrect, Comerica’s actual results could differ materially from those discussed.  Factors that could cause or contribute to such differences are changes in general economic, political or industry conditions and related credit and market conditions; changes in trade, monetary and fiscal policies, including the interest rate policies of the Federal Reserve Board; adverse conditions in the capital markets; the interdependence of financial service companies; changes in regulation or oversight, including the effects of recently enacted legislation, actions taken by or proposed by the U.S. Treasury, the Board of Governors of the Federal Reserve System, the Texas Department of Banking and the Federal Deposit Insurance Corporation, legislation or regulations enacted in the future, and the impact and expiration of such legislation and regulatory actions; unfavorable developments concerning credit quality; the proposed acquisition of Sterling Bancshares, Inc. (“Sterling”), or any future acquisitions; the effects of more stringent capital or liquidity requirements; declines or other changes in the businesses or industries in which Comerica has a concentration of loans, including, but not limited to, the automotive production industry and the real estate business lines; the implementation of Comerica’s strategies and business models, including the anticipated performance of any new banking centers; Comerica’s ability to utilize technology to efficiently and effectively develop, market and deliver new products and services; operational difficulties or information security problems; changes in the financial markets, including fluctuations in interest rates and their impact on deposit pricing; the entry of new competitors in Comerica’s markets; changes in customer borrowing, repayment, investment and deposit practices; management’s ability to maintain and expand customer relationships; management’s ability to retain key officers and employees; the impact of legal and regulatory proceedings; the effectiveness of methods of reducing risk exposures; the effects of war and other armed conflicts or acts of terrorism and the effects of catastrophic events including, but not limited to, hurricanes, tornadoes, earthquakes, fires, droughts and floods. Comerica cautions that the foregoing list of factors is not exclusive. For discussion of factors that may cause actual results to differ from expectations, please refer to our filings with the Securities and Exchange Commission (“SEC”). In particular, please refer to “Item 1A. Risk Factors” beginning on page 16 of Comerica’s Annual Report on Form 10-K for the year ended December 31, 2010. Forward-looking statements speak only as of the date they are made. Comerica does not undertake to update forward-looking statements to reflect facts, circumstances, assumptions or events that occur after the date the forward-looking statements are made. For any forward-looking statements made in this filing or in any documents, Comerica claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995.

In connection with the proposed merger transaction, Comerica has filed with the SEC a Registration Statement on Form S-4 that includes a Proxy Statement of Sterling and a Prospectus of Comerica, and Sterling mailed the definitive Proxy Statement/Prospectus to its shareholders on or about April 6, 2011. Each of Comerica and Sterling may file other relevant documents concerning the proposed transaction. SHAREHOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT AND THE DEFINITIVE PROXY STATEMENT/PROSPECTUS REGARDING THE MERGER AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY CONTAIN IMPORTANT INFORMATION.

A free copy of the definitive Proxy Statement/Prospectus, as well as other filings containing information about Comerica and Sterling, may be obtained at the SEC’s Internet site (http://www.sec.gov). You may be able to obtain these documents, free of charge, from Comerica at www.comerica.com under the tab “Investor Relations” and then under the heading “SEC Filings” or from Sterling by accessing Sterling’s website at www.banksterling.com under the tab “Investor Relations” and then under the heading “SEC Filings.”

COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION

Commercial Loan Growth Driven by Middle Market, Global Corporate Banking

and Specialty Businesses

Pending Acquisition of Sterling Bancshares, Inc. (Sterling) Expected to Close July 28, 2011

DALLAS/July 19, 2011 — Comerica Incorporated (NYSE: CMA) today reported second quarter 2011 net income of $96 million, a decrease of $7 million compared to $103 million for the first quarter 2011, primarily due to the impact of a federal income tax settlement. Second quarter 2011 also included $5 million of costs incurred in connection with the pending acquisition of Sterling.

(dollar amounts in millions, except per share data)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income	$	391		$	395		$	422
Provision for loan losses	47			49			126
Noninterest income	202			207			194
Noninterest expenses	409			415			397
Provision for income taxes	41			35			23
Net income	96			103			70
Net income attributable to common shares	95			102			69
Diluted income per common share	0.53			0.57			0.39
Tier 1 capital ratio	10.53		%(a)	10.35		%	10.64		%
Tangible common equity ratio (b)	10.90			10.43			10.11
Net interest margin	3.14			3.25			3.28

(a) June 30, 2011 ratio is estimated.

(b) See Reconciliation of Non-GAAP Financial Measures.

“Total average loans were down one percent and period-end loans were up modestly from March 31, 2011. We were pleased to see commercial loan growth in the second quarter, driven primarily by increases in Middle Market, Global Corporate Banking and Specialty Businesses, partially offset by a decrease in floor plan loans in National Dealer Services,” said Ralph W. Babb Jr., chairman and chief executive officer.  “Commercial Real Estate declined, offsetting the commercial loan growth.  We expect the pace of decline in Commercial Real Estate to lessen in the second half of 2011 and National Dealer Services to rebound in the fourth quarter. Our core deposits continued to increase in the second quarter, which led to higher excess liquidity and a lower net interest margin.  Credit quality continued to improve and expenses were well controlled.

“We are excited about our pending acquisition of Sterling Bancshares, Inc., a strategically compelling transaction that significantly boosts our presence in the growing state of Texas.  Following the expiration of the required 15-day Department of Justice waiting period associated with the Federal Reserve Board’s approval order, we expect the acquisition will close on July 28, 2011. Sterling’s solid deposit base and well located branch network are expected to triple our Houston market share, provide us entry into the attractive San Antonio and Kerrville regions and complement our existing footprint in the Dallas-Fort Worth area. In short, it is a unique opportunity that provides us enhanced growth opportunities going forward.

“The Sterling integration plans remain on track.  We expect a smooth transition, given the size of the acquisition and our in-depth knowledge of the Texas market.  We look forward to welcoming Sterling customers and employees to Comerica as we begin this new chapter in our Texas banking history.”

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 2

Second Quarter 2011 Highlights Compared to First Quarter 2011

·Average loans increased in the Middle Market ($160 million; one percent), Global Corporate Banking ($136 million; 3 percent), and Specialty Businesses ($62 million; one percent) business lines.  These increases were more than offset by decreases in the Commercial Real Estate ($393 million; 9 percent) and National Dealer Services ($194 million; 5 percent) business lines, resulting in a decrease in average total loans of $377 million, or one percent.  Period-end loans increased $17 million from March 31, 2011 to June 30, 2011.

·Average core deposits increased $881 million in the second quarter 2011, with increases in all major markets, led by the Texas market.

·The net interest margin of 3.14 percent decreased 11 basis points compared to the first quarter 2011, primarily resulting from an increase in excess liquidity (represented by average balances deposited with the Federal Reserve Bank), and a decrease in loan pricing based on a decrease in LIBOR.

·Average earning assets increased $789 million in the second quarter 2011.

·Credit quality improvement continued in the second quarter 2011.  Net credit-related charge-offs decreased $11 million to $90 million.  Internal watch list loans declined $339 million to $4.8 billion and nonperforming assets decreased $60 million.

·Noninterest expenses decreased $6 million to $409 million in the second quarter 2011, compared to the first quarter 2011.  Noninterest expenses included $5 million of costs incurred in connection with the pending Sterling acquisition in the second quarter 2011, which were more than offset by declines in numerous noninterest expense categories.

·The second quarter 2011 provision for income taxes included net after-tax charges of $8 million, which primarily reflected a $19 million charge related to a final settlement agreement with the Internal Revenue Service (IRS) involving repatriation of foreign earnings on a structured investment transaction, partially offset by a release of tax reserves of $9 million resulting from Comerica’s planned participation in a recently enacted State of California voluntary compliance initiative.  Comerica has no other investment structures with uncertain tax positions.

·The estimated Tier 1 capital ratio increased 18 basis points, to 10.53 percent at June 30, 2011, from March 31, 2011.

Net Interest Income and Net Interest Margin

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income	$	391		$	395		$	422
Net interest margin	3.14		%	3.25		%	3.28		%
Selected average balances:
Total earning assets	$	50,136		$	49,347		$	51,835
Total investment securities	7,407			7,311			7,262
Federal Reserve Bank deposits (excess liquidity) (a)	3,382			2,297			3,719
Total loans	39,174			39,551			40,672
Total core deposits (b)	41,067			40,186			38,928
Total noninterest-bearing deposits	15,786			15,459			15,218

(a) See Reconciliation of Non-GAAP Financial Measures.

(b) Core deposits exclude other time deposits and foreign office time deposits.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 3

·The $4 million decrease in net interest income in the second quarter 2011, when compared to the first quarter 2011, resulted primarily from a decline in the net interest margin, the first quarter 2011 maturities of interest rate swaps at positive spreads and a decrease in average loans, partially offset by one more day in the quarter.

·The net interest margin of 3.14 percent declined 11 basis points compared to the first quarter 2011.  The decline in the net interest margin primarily reflected the impact of an increase in excess liquidity (7 basis points), a decrease in loan pricing based on a decrease in LIBOR, and the first quarter 2011 maturities of interest rate swaps at positive spreads.

·Average earning assets increased $789 million, primarily due to increases of $1.1 billion in excess liquidity and $96 million in average investment securities available-for-sale, partially offset by a $377 million decrease in average loans.

·Second quarter 2011 average core deposits increased $881 million compared to first quarter 2011, primarily reflecting increases in money market and NOW deposits ($410 million), noninterest-bearing deposits ($327 million) and customer certificates of deposit ($100 million).

Noninterest Income

Noninterest income was $202 million for the second quarter 2011, compared to $207 million for the first quarter 2011.  The $5 million decrease primarily resulted from a decrease in deferred compensation asset returns ($3 million) (offset by a decrease in deferred compensation plan costs in noninterest expense).

Noninterest Expenses

Noninterest expenses totaled $409 million in the second quarter 2011, a decrease of $6 million from the first quarter 2011. The decrease in noninterest expenses was primarily due to decreases in salaries expense ($3 million), FDIC insurance expense ($3 million), software expense ($3 million) and other real estate expense ($2 million), partially offset by certain pre-integration and transaction costs incurred in connection with the pending Sterling acquisition ($5 million).

Provision for Income Taxes

The second quarter 2011 provision for income taxes included net after-tax charges of $8 million, which primarily reflected a $19 million charge related to a final settlement agreement with the IRS involving repatriation of foreign earnings on a structured investment transaction, partially offset by a release of tax reserves of $9 million resulting from Comerica’s planned participation in a recently enacted State of California voluntary compliance initiative.

Credit Quality

“Broad-based, steady improvement in credit quality continued in the second quarter,” said Babb.  “This was the eighth consecutive quarter of decline in net charge offs, with an $11 million decrease.  We had strong recoveries of $35 million in the second quarter, up from $22 million in the first quarter.   Credit quality migration remains positive, as demonstrated by the $339 million decline in watch list loans, which provide our best early indicator of future credit quality, as well as the $60 million decline in nonperforming assets.  As a result of these overall improvements to our credit metrics, the provision for loan losses decreased to $47 million.  Also, of note, the results of the recently received Shared National Credit Exam are reflected in our second quarter credit metrics.”

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 4

·Net credit-related charge-offs decreased $11 million to $90 million in the second quarter 2011, from $101 million in the first quarter 2011. The decrease in net credit-related charge-offs primarily reflected a decrease of $22 million in the Middle Market business line, partially offset by an increase of $9 million in the Private Banking business line.

·Internal watch list loans declined $339 million to $4.8 billion from March 31, 2011 to June 30, 2011.

·During the second quarter 2011, $163 million of loan relationships greater than $2 million were transferred to nonaccrual status, a decrease of $3 million from the first quarter 2011.  Of the transfers of loan relationships greater than $2 million to nonaccrual in the second quarter 2011, $76 million were from the Middle Market business line, primarily in the Midwest and Western markets, and $29 million were from the Commercial Real Estate business line, distributed across the Florida, Western and Other markets.

·Nonperforming assets decreased $60 million, compared to March 31, 2011, to $1.0 billion, or 2.66 percent of total loans and foreclosed property, at June 30, 2011.

·The allowance for loan losses to total loans ratio was 2.06 percent and 2.17 percent at June 30, 2011 and March 31, 2011, respectively.

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net credit-related charge-offs	$	90		$	101		$	146
Net credit-related charge-offs/Average total loans	0.92		%	1.03		%	1.44		%
Provision for loan losses	$	47		$	49		$	126
Provision for credit losses on lending-related commitments	(2		)	(3		)	—
Total provision for credit losses	45			46			126
Nonperforming loans	974			1,030			1,121
Nonperforming assets (NPAs)	1,044			1,104			1,214
NPAs/Total loans and foreclosed property	2.66		%	2.81		%	2.98		%
Loans past due 90 days or more and still accruing	$	64		$	72		$	115
Allowance for loan losses	806			849			967
Allowance for credit losses on lending-related commitments (a)	30			32			44
Total allowance for credit losses	836			881			1,011
Allowance for loan losses/Total loans	2.06		%	2.17		%	2.38		%
Allowance for loan losses/Nonperforming loans	83			82			86

(a) Included in “Accrued expenses and other liabilities” on the consolidated balance sheets.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 5

Balance Sheet and Capital Management

Total assets and common shareholders’ equity were $54.1 billion and $6.0 billion, respectively, at June 30, 2011, compared to $55.0 billion and $5.9 billion, respectively, at March 31, 2011. There were approximately 177 million common shares outstanding at June 30, 2011.  Comerica did not repurchase any shares of common stock in the open market in the second quarter 2011 under the share repurchase program due to the pending Sterling acquisition.  Management expects to resume repurchases in the third quarter 2011.

Comerica’s tangible common equity ratio was 10.90 percent at June 30, 2011, an increase of 47 basis points from March 31, 2011. The estimated Tier 1 capital ratio increased 18 basis points, to 10.53 percent at June 30, 2011, from March 31, 2011.

Second-Half 2011 Outlook (Combined Comerica and Sterling Results) Compared to First-Half 2011 (Comerica Only Results)

For the second half of 2011, management expects the following combined results, based on the incorporation of the projected results of Sterling operations from the expected acquisition closing date of July 28, 2011 through year-end 2011, compared to Comerica-only results for the first half of 2011, assuming a continuation of modest growth in the economy.  The acquisition is subject to customary closing conditions.  The estimated purchase accounting impacts incorporated in this outlook are preliminary and may not be indicative of actual amounts that will be recorded as additional information becomes available and as additional analyses are performed.

·A mid-single digit increase in average loans due to the acquisition of Sterling loans at fair value.

·Average earning assets of approximately $52.5 billion, reflecting increases, primarily related to Sterling, in average loans and average investment securities available-for-sale, partially offset by a decrease in excess liquidity.

·An average net interest margin of 3.35 percent to 3.40 percent, reflecting the benefit from the accretion of the purchase discount on the acquired Sterling loan portfolio ($35 million to $45 million; 13 basis points to 17 basis points), a reduction in excess liquidity, no increase in the Federal Funds rate, and LIBOR consistent with second quarter 2011 levels.

·Net credit-related charge-offs between $165 million and $185 million for the second half of 2011. The provision for credit losses is expected to be between $65 million and $85 million for the second half of 2011.

·A mid-single digit decline in noninterest income in the second half of 2011 compared to the first half of 2011, primarily due to the impact of regulatory changes, partially offset by the inclusion of Sterling.

·Excluding merger and restructuring charges, a high single-digit increase in noninterest expenses in the second half of 2011 compared to the first half of 2011, primarily due to the addition of Sterling.

·Total merger and restructuring charges of approximately $80 million, after-tax, with about $25 million, after-tax, recognized in each of the third and fourth quarters of 2011, and the remainder recognized in 2012.

·Total acquisition synergies of approximately 35 percent of Sterling expenses, or about $56 million, with the majority realized in 2012.

·For the second half of 2011, income tax expense to approximate 36 percent of income before income taxes less approximately $33 million in tax benefits.

·Continue share repurchase program that, combined with dividend payments, results in a payout up to 50 percent of full-year earnings.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 6

Business Segments

Comerica’s operations are strategically aligned into three major business segments: the Business Bank, the Retail Bank, and Wealth Management.  The Finance Division is also included as a segment. The financial results below are based on the internal business unit structure of the Corporation and methodologies in effect at June 30, 2011 and are presented on a fully taxable equivalent (FTE) basis. The accompanying narrative addresses second quarter 2011 results compared to first quarter 2011.

The following table presents net income (loss) by business segment.

(dollar amounts in millions)	2nd Qtr ‘11					1st Qtr ‘11					2nd Qtr ‘10
Business Bank	$	176		95	%	$	167		93	%	$	135		98	%
Retail Bank	(3		)	(2	)	(2		)	(1	)	(3		)	(2	)
Wealth Management	12			7		14			8		5			4
	185			100	%	179			100	%	137			100	%
Finance	(87		)			(76		)			(57		)
Other (a)	(2		)			—					(10		)
Total	$	96				$	103				$	70

(a) Includes discontinued operations and items not directly associated with the three major business segments or the Finance Division.

Business Bank

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income (FTE)	$	342		$	341		$	351
Provision for loan losses	6			18			83
Noninterest income	79			77			78
Noninterest expenses	158			160			157
Net income	176			167			135
Net credit-related charge-offs	54			73			113
Selected average balances:
Assets	29,893			30,091			30,609
Loans	29,380			29,609			30,353
Deposits	20,396			20,084			19,069
Net interest margin	4.65		%	4.66		%	4.63		%

·Average loans decreased $229 million, reflecting increases in Middle Market, Global Corporate Banking and Specialty Businesses, more than offset by decreases in Commercial Real Estate and National Dealer Services.

·Average deposits increased $312 million, primarily due to increases in Specialty Businesses and Global Corporate Banking, partially offset by a decrease in Middle Market.

·The net interest margin of 4.65 percent decreased one basis point, primarily due to a decrease in deposit spreads.

·The provision for loan losses decreased $12 million, primarily reflecting decreases in Middle Market and Commercial Real Estate, partially offset by increases in Global Corporate Banking and Specialty Businesses.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 7

Retail Bank

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income (FTE)	$	141		$	139		$	134
Provision for loan losses	24			23			20
Noninterest income	46			42			42
Noninterest expenses	162			162			160
Net loss	(3		)	(2		)	(3		)
Net credit-related charge-offs	22			23			22
Selected average balances:
Assets	5,453			5,558			5,937
Loans	4,999			5,106			5,446
Deposits	17,737			17,360			16,930
Net interest margin	3.22		%	3.25		%	3.17		%

·Average loans decreased $107 million, reflecting declines across all markets and business lines.

·Average deposits increased $377 million, primarily due to increases in transaction and money market deposits, partially offset by a decrease in customer certificates of deposit.

·The net interest margin of 3.22 percent decreased three basis points, primarily due to a decrease in deposit spreads.

·Noninterest income increased $4 million, reflecting nominal increases in numerous categories.

Wealth Management

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income (FTE)	$	48		$	44		$	45
Provision for loan losses	14			8			19
Noninterest income	63			64			61
Noninterest expenses	76			78			79
Net income	12			14			5
Net credit-related charge-offs	14			5			11
Selected average balances:
Assets	4,728			4,809			4,903
Loans	4,742			4,807			4,840
Deposits	2,978			2,800			2,924
Net interest margin	4.07		%	3.76		%	3.73		%

·Average loans decreased $65 million.

·Average deposits increased $178 million, primarily reflecting increases in noninterest-bearing transaction accounts.

·The net interest margin of 4.07 percent increased 31 basis points, primarily due to increases in loan spreads and deposit balances.

·The provision for loan losses increased $6 million, due to an increase in Private Banking in the Western Market.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 8

Geographic Market Segments

Comerica also provides market segment results for four primary geographic markets: Midwest, Western, Texas and Florida.  In addition to the four primary geographic markets, Other Markets and International are also reported as market segments.  The financial results below are based on methodologies in effect at June 30, 2011 and are presented on a fully taxable equivalent (FTE) basis. The accompanying narrative addresses second quarter 2011 results compared to first quarter 2011.

The following table presents net income (loss) by market segment.

(dollar amounts in millions)	2nd Qtr ‘11					1st Qtr ‘11					2nd Qtr ‘10
Midwest	$	62		34	%	$	53		30	%	$	61		44	%
Western	50			27		51			28		38			28
Texas	33			18		29			16		26			19
Florida	(5		)	(3	)	(4		)	(2	)	(8		)	(6	)
Other Markets	30			16		38			21		4			3
International	15			8		12			7		16			12
	185			100	%	179			100	%	137			100	%
Finance & Other Businesses (a)	(89		)			(76		)			(67		)
Total	$	96				$	103				$	70

(a) Includes discontinued operations and items not directly associated with the geographic markets.

Midwest Market

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income (FTE)	$	204		$	203		$	211
Provision for loan losses	15			34			34
Noninterest income	100			100			97
Noninterest expenses	183			188			180
Net income	62			53			61
Net credit-related charge-offs	37			46			44
Selected average balances:
Assets	14,267			14,307			14,626
Loans	14,051			14,104			14,592
Deposits	18,319			18,230			17,988
Net interest margin	4.46		%	4.49		%	4.66		%

·Average loans decreased $53 million, with increases in Middle Market and Global Corporate Banking more than offset by declines in most other business lines.

·Average deposits increased $89 million, primarily due to increases in Personal Banking, Small Business Banking, Commercial Real Estate and Middle Market, partially offset by decreases in Global Corporate Banking and Specialty Businesses.

·The net interest margin of 4.46 percent decreased three basis points, primarily due to decreases in deposit spreads and loan balances, partially offset by an increase in loan spreads.

·The provision for loan losses decreased $19 million, primarily reflecting decreases in Middle Market and Commercial Real Estate, partially offset by an increase in Global Corporate Banking.

·Noninterest expenses decreased $5 million, primarily due to decreases in other real estate expenses, net allocated corporate overhead expenses and FDIC insurance expense, partially offset by an increase in the provision for credit losses on lending-related commitments.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 9

Western Market

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income (FTE)	$	166		$	164		$	163
Provision for loan losses	20			11			27
Noninterest income	37			37			33
Noninterest expenses	108			109			110
Net income	50			51			38
Net credit-related charge-offs	26			26			47
Selected average balances:
Assets	12,329			12,590			13,006
Loans	12,121			12,383			12,792
Deposits	12,458			12,235			11,951
Net interest margin	5.35		%	5.37		%	5.13		%

·Average loans decreased $262 million, primarily due to decreases in National Dealer Services, Commercial Real Estate and Private Banking, partially offset by increases in Middle Market and Global Corporate Banking.

·Average deposits increased $223 million, primarily due to increases in Specialty Businesses and Private Banking, partially offset by a decrease in Middle Market.

·The net interest margin of 5.35 percent decreased two basis points, primarily due to a decrease in loan balances.

·The provision for loan losses increased $9 million, primarily due to increases in Private Banking and Specialty Businesses.

Texas Market

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income (FTE)	$	89		$	87		$	81
Provision for loan losses	(2		)	4			(1		)
Noninterest income	25			23			23
Noninterest expenses	63			61			65
Net income	33			29			26
Total net credit-related charge-offs	3			8			8
Selected average balances:
Assets	7,081			7,031			6,652
Loans	6,871			6,824			6,428
Deposits	6,175			5,786			5,316
Net interest margin	5.19		%	5.17		%	5.05		%

·Average loans increased $47 million, primarily due to increases in Middle Market and Global Corporate Banking, partially offset by a decrease in Commercial Real Estate.

·Average deposits increased $389 million, reflecting increases across most business lines.

·The net interest margin of 5.19 percent increased two basis points, primarily due to increases in loan spreads and deposit balances, partially offset by a decrease in deposit spreads.

·The provision for loan losses decreased $6 million, with decreases across most business lines.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 10

Florida Market

(dollar amounts in millions)	2nd Qtr ‘11			1st Qtr ‘11			2nd Qtr ‘10
Net interest income (FTE)	$	12		$	11		$	12
Provision for loan losses	11			8			17
Noninterest income	4			4			4
Noninterest expenses	12			12			12
Net loss	(5		)	(4		)	(8		)
Net credit-related charge-offs	15			8			7
Selected average balances:
Assets	1,534			1,553			1,576
Loans	1,565			1,580			1,575
Deposits	396			367			404
Net interest margin	3.14		%	2.82		%	2.94		%

·Average loans decreased $15 million, primarily due to decreases in Commercial Real Estate and National Dealer Services, partially offset by increases in Global Corporate Banking and Private Banking.

·Average deposits increased $29 million, primarily due to an increase in Private Banking.

·The net interest margin of 3.14 percent increased 32 basis points, primarily due to increases in loan spreads and deposit balances.

·The provision for loan losses increased $3 million, primarily due to increases in Middle Market, Commercial Real Estate and Private Banking.

Conference Call and Webcast

Comerica will host a conference call to review second quarter 2011 financial results at 7 a.m. CT Tuesday, July 19, 2011. Interested parties may access the conference call by calling (800) 309-2262 or (706) 679-5261 (event ID No. 77355589). The call and supplemental financial information can also be accessed on the Internet at www.comerica.com.  A telephone replay will be available approximately two hours following the conference call through July 31, 2011. The conference call replay can be accessed by calling (800) 642-1687 or (706) 645-9291 (event ID No. 77355589). A replay of the Webcast can also be accessed via Comerica’s “Investor Relations” page at www.comerica.com.

Comerica Incorporated is a financial services company headquartered in Dallas, Texas, and strategically aligned by three major business segments: the Business Bank, the Retail Bank, and Wealth Management. Comerica focuses on relationships and helping people and businesses be successful. In addition to Texas, Comerica Bank locations can be found in Arizona, California, Florida and Michigan, with select businesses operating in several other states, as well as in Canada and Mexico.

This press release contains both financial measures based on accounting principles generally accepted in the United States (GAAP) and non-GAAP based financial measures, which are used where management believes it to be helpful in understanding Comerica’s results of operations or financial position.  Where non-GAAP financial measures are used, the comparable GAAP financial measure, as well as the reconcilement to the comparable GAAP financial measure, can be found in this press release.  These disclosures should not be viewed as a substitute for operating results determined in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 11

Forward-looking Statements

Any statements in this news release that are not historical facts are forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Words such as “anticipates,” “believes,” “feels,” “expects,” “estimates,” “seeks,” “strives,” “plans,” “intends,” “outlook,” “forecast,” “position,” “target,” “mission,” “assume,” “achievable,” “potential,” “strategy,” “goal,” “aspiration,” “opportunity,” “initiative,” “outcome,” “continue,” “remain,” “maintain,” “trend,” “objective,” “pending,” “looks forward” and variations of such words and similar expressions, or future or conditional verbs such as “will,” “would,” “should,” “could,” “might,” “can,” “may” or similar expressions, as they relate to Comerica or its management, are intended to identify forward-looking statements. These forward-looking statements are predicated on the beliefs and assumptions of Comerica’s management based on information known to Comerica’s management as of the date of this news release and do not purport to speak as of any other date. Forward-looking statements may include descriptions of plans and objectives of Comerica’s management for future or past operations, products or services, and forecasts of Comerica’s revenue, earnings or other measures of economic performance, including statements of profitability, business segments and subsidiaries, estimates of credit trends and global stability. Such statements reflect the view of Comerica’s management as of this date with respect to future events and are subject to risks and uncertainties. Should one or more of these risks materialize or should underlying beliefs or assumptions prove incorrect, Comerica’s actual results could differ materially from those discussed.  Factors that could cause or contribute to such differences are changes in general economic, political or industry conditions and related credit and market conditions; changes in trade, monetary and fiscal policies, including the interest rate policies of the Federal Reserve Board; adverse conditions in the capital markets; the interdependence of financial service companies; changes in regulation or oversight, including the effects of recently enacted legislation, actions taken by or proposed by the U.S. Treasury, the Board of Governors of the Federal Reserve System, the Texas Department of Banking and the Federal Deposit Insurance Corporation, legislation or regulations enacted in the future, and the impact and expiration of such legislation and regulatory actions; unfavorable developments concerning credit quality; the proposed acquisition of Sterling Bancshares, Inc. (“Sterling”), or any future acquisitions; the effects of more stringent capital or liquidity requirements; declines or other changes in the businesses or industries in which Comerica has a concentration of loans, including, but not limited to, the automotive production industry and the real estate business lines; the implementation of Comerica’s strategies and business models, including the anticipated performance of any new banking centers; Comerica’s ability to utilize technology to efficiently and effectively develop, market and deliver new products and services; operational difficulties or information security problems; changes in the financial markets, including fluctuations in interest rates and their impact on deposit pricing; the entry of new competitors in Comerica’s markets; changes in customer borrowing, repayment, investment and deposit practices; management’s ability to maintain and expand customer relationships; management’s ability to retain key officers and employees; the impact of legal and regulatory proceedings; the effectiveness of methods of reducing risk exposures; the effects of war and other armed conflicts or acts of terrorism and the effects of catastrophic events including, but not limited to, hurricanes, tornadoes, earthquakes, fires, droughts and floods. Comerica cautions that the foregoing list of factors is not exclusive. For discussion of factors that may cause actual results to differ from expectations, please refer to our filings with the Securities and Exchange Commission (“SEC”). In particular, please refer to “Item 1A. Risk Factors” beginning on page 16 of Comerica’s Annual Report on Form 10-K for the year ended December 31, 2010. Forward-looking statements speak only as of the date they are made. Comerica does not undertake to update forward-looking statements to reflect facts, circumstances, assumptions or events that occur after the date the forward-looking statements are made. For any forward-looking statements made in this news release or in any documents, Comerica claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995.

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COMERICA REPORTS SECOND QUARTER 2011 NET INCOME OF $96 MILLION — 12

Additional Information for Shareholders

In connection with the proposed merger transaction, Comerica has filed with the SEC a Registration Statement on Form S-4 that includes a Proxy Statement of Sterling and a Prospectus of Comerica, and Sterling mailed the definitive Proxy Statement/Prospectus to its shareholders on or about April 6, 2011. Each of Comerica and Sterling may file other relevant documents concerning the proposed transaction. SHAREHOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT AND THE DEFINITIVE PROXY STATEMENT/PROSPECTUS REGARDING THE MERGER AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY CONTAIN IMPORTANT INFORMATION.

A free copy of the definitive Proxy Statement/Prospectus, as well as other filings containing information about Comerica and Sterling, may be obtained at the SEC’s Internet site (http://www.sec.gov). You may be able to obtain these documents, free of charge, from Comerica at www.comerica.com under the tab “Investor Relations” and then under the heading “SEC Filings” or from Sterling by accessing Sterling’s website at www.banksterling.com under the tab “Investor Relations” and then under the heading “SEC Filings.”

Media Contact:	Investor Contacts:
Wayne J. Mielke	Darlene P. Persons
(214) 462-4463	(214) 462-6831
	Tracy Fralick
	(214) 462-6834

CONSOLIDATED FINANCIAL HIGHLIGHTS (unaudited)

Comerica Incorporated and Subsidiaries

	Three Months Ended									Six Months Ended
	June 30,			March 31,			June 30,			June 30,
(in millions, except per share data)	2011			2011			2010			2011			2010
PER COMMON SHARE AND COMMON STOCK DATA
Diluted net income (loss)	$	0.53		$	0.57		$	0.39		$	1.10		$	(0.01	)
Cash dividends declared	0.10			0.10			0.05			0.20			0.10
Common shareholders’ equity (at period end)	34.15			33.25			32.85
Average diluted shares (in thousands)	177,602			178,425			178,432			178,011			165,100
KEY RATIOS
Return on average common shareholders’ equity	6.41		%	7.08		%	4.89		%	6.74		%	(0.05		)%
Return on average assets	0.70			0.77			0.50			0.73			0.43
Tier 1 common capital ratio (a) (b)	10.53			10.35			9.81
Tier 1 risk-based capital ratio (b)	10.53			10.35			10.64
Total risk-based capital ratio (b)	14.81			14.80			15.03
Leverage ratio (b)	11.39			11.37			11.36
Tangible common equity ratio (a)	10.90			10.43			10.11
AVERAGE BALANCES
Commercial loans	$	21,677		$	21,496		$	20,910		$	21,586		$	20,961
Real estate construction loans:
Commercial Real Estate business line (c)	1,486			1,754			2,537			1,619			2,726
Other business lines (d)	395			425			450			410			459
Commercial mortgage loans:
Commercial Real Estate business line (c)	1,912			1,978			1,947			1,945			1,896
Other business lines (d)	7,724			7,812			8,425			7,768			8,484
Residential mortgage loans	1,525			1,599			1,607			1,562			1,620
Consumer loans	2,243			2,281			2,448			2,262			2,464
Lease financing	958			987			1,108			972			1,119
International loans	1,254			1,219			1,240			1,237			1,261
Total loans	39,174			39,551			40,672			39,361			40,990
Earning assets	50,136			49,347			51,835			49,743			52,385
Total assets	54,517			53,775			56,258			54,148			56,885
Noninterest-bearing deposits	15,786			15,459			15,218			15,623			14,923
Interest-bearing core deposits	25,281			24,727			23,710			25,005			23,165
Total core deposits	41,067			40,186			38,928			40,628			38,088
Common shareholders’ equity	5,972			5,835			5,708			5,904			5,391
Total shareholders’ equity	5,972			5,835			5,708			5,904			6,283
NET INTEREST INCOME
Net interest income (fully taxable equivalent basis)	$	392		$	396		$	424		$	788		$	840
Fully taxable equivalent adjustment	1			1			2			2			3
Net interest margin (fully taxable equivalent basis)	3.14		%	3.25		%	3.28		%	3.19		%	3.23		%
CREDIT QUALITY
Nonaccrual loans	$	941		$	996		$	1,098
Reduced-rate loans	33			34			23
Total nonperforming loans	974			1,030			1,121
Foreclosed property	70			74			93
Total nonperforming assets	1,044			1,104			1,214
Loans past due 90 days or more and still accruing	64			72			115
Gross loan charge-offs	125			123			158			$	248		$	342
Loan recoveries	35			22			12			57			23
Net loan charge-offs	90			101			146			191			319
Lending-related commitment charge-offs	—			—			—			—			—
Total net credit-related charge-offs	90			101			146			191			319
Allowance for loan losses	806			849			967
Allowance for credit losses on lending-related commitments	30			32			44
Total allowance for credit losses	836			881			1,011
Allowance for loan losses as a percentage of total loans	2.06		%	2.17		%	2.38		%
Net loan charge-offs as a percentage of average total loans	0.92			1.03			1.44			0.97		%	1.56		%
Net credit-related charge-offs as a percentage of average total loans	0.92			1.03			1.44			0.97			1.56
Nonperforming assets as a percentage of total loans and foreclosed property	2.66			2.81			2.98
Allowance for loan losses as a percentage of total nonperforming loans	83			82			86

(a) See Reconciliation of Non-GAAP Financial Measures.

(b) June 30, 2011 ratios are estimated.

(c) Primarily loans to real estate investors and developers.

(d) Primarily loans secured by owner-occupied real estate.

13

CONSOLIDATED BALANCE SHEETS

Comerica Incorporated and Subsidiaries

	June 30,			March 31,			December 31,			June 30,
(in millions, except share data)	2011			2011			2010			2010
	(unaudited)			(unaudited)						(unaudited)
ASSETS
Cash and due from banks	$	987		$	875		$	668		$	816
Interest-bearing deposits with banks	2,479			3,570			1,415			3,409
Other short-term investments	124			154			141			134
Investment securities available-for-sale	7,537			7,406			7,560			7,188
Commercial loans	22,052			21,360			22,145			21,151
Real estate construction loans	1,728			2,023			2,253			2,774
Commercial mortgage loans	9,579			9,697			9,767			10,318
Residential mortgage loans	1,491			1,550			1,619			1,606
Consumer loans	2,232			2,262			2,311			2,443
Lease financing	949			958			1,009			1,084
International loans	1,162			1,326			1,132			1,226
Total loans	39,193			39,176			40,236			40,602
Less allowance for loan losses	(806		)	(849		)	(901		)	(967		)
Net loans	38,387			38,327			39,335			39,635
Premises and equipment	641			637			630			634
Customers’ liability on acceptances outstanding	10			14			9			24
Accrued income and other assets	3,976			4,034			3,909			4,045
Total assets	$	54,141		$	55,017		$	53,667		$	55,885
LIABILITIES AND SHAREHOLDERS’ EQUITY
Noninterest-bearing deposits	$	16,344		$	16,357		$	15,538		$	15,769
Money market and NOW deposits	18,033			17,888			17,622			16,062
Savings deposits	1,462			1,457			1,397			1,407
Customer certificates of deposit	5,551			5,672			5,482			5,893
Other time deposits	—			—			—			165
Foreign office time deposits	368			499			432			484
Total interest-bearing deposits	25,414			25,516			24,933			24,011
Total deposits	41,758			41,873			40,471			39,780
Short-term borrowings	67			61			130			200
Acceptances outstanding	10			14			9			24
Accrued expenses and other liabilities	1,062			1,076			1,126			1,048
Medium- and long-term debt	5,206			6,116			6,138			9,041
Total liabilities	48,103			49,140			47,874			50,093
Common stock - $5 par value:
Authorized - 325,000,000 shares
Issued - 203,878,110 shares	1,019			1,019			1,019			1,019
Capital surplus	1,472			1,464			1,481			1,467
Accumulated other comprehensive loss	(308		)	(382		)	(389		)	(240		)
Retained earnings	5,395			5,317			5,247			5,124
Less cost of common stock in treasury - 27,092,427 shares at 6/30/11, 27,103,941 shares at 3/31/11, 27,342,518 shares at 12/31/10, and 27,561,412 shares at 6/30/10	(1,540		)	(1,541		)	(1,565		)	(1,578		)
Total shareholders’ equity	6,038			5,877			5,793			5,792
Total liabilities and shareholders’ equity	$	54,141		$	55,017		$	53,667		$	55,885

14

CONSOLIDATED STATEMENTS OF INCOME (unaudited)

Comerica Incorporated and Subsidiaries

	Three Months Ended					Six Months Ended
	June 30,					June 30,
(in millions, except per share data)	2011			2010		2011			2010
INTEREST INCOME
Interest and fees on loans	$	369		$	412	$	744		$	824
Interest on investment securities	59			61		116			122
Interest on short-term investments	3			3		5			6
Total interest income	431			476		865			952
INTEREST EXPENSE
Interest on deposits	23			29		45			64
Interest on medium- and long-term debt	17			25		34			51
Total interest expense	40			54		79			115
Net interest income	391			422		786			837
Provision for loan losses	47			126		96			301
Net interest income after provision for loan losses	344			296		690			536
NONINTEREST INCOME
Service charges on deposit accounts	51			52		103			108
Fiduciary income	39			38		78			77
Commercial lending fees	21			22		42			44
Letter of credit fees	18			19		36			37
Card fees	15			15		30			28
Foreign exchange income	10			10		19			20
Bank-owned life insurance	9			9		17			17
Brokerage fees	6			6		12			12
Net securities gains	4			1		6			3
Other noninterest income	29			22		66			42
Total noninterest income	202			194		409			388
NONINTEREST EXPENSES
Salaries	185			179		373			348
Employee benefits	50			45		100			89
Total salaries and employee benefits	235			224		473			437
Net occupancy expense	38			39		78			80
Equipment expense	17			15		32			32
Outside processing fee expense	25			23		49			46
Software expense	20			22		43			44
FDIC insurance expense	12			16		27			33
Legal fees	8			9		17			17
Advertising expense	7			7		14			15
Other real estate expense	6			5		14			17
Litigation and operational losses	5			2		8			3
Merger and restructuring charges	5			—		5			—
Provision for credit losses on lending-related commitments	(2		)	—		(5		)	7
Other noninterest expenses	33			35		69			70
Total noninterest expenses	409			397		824			801
Income from continuing operations before income taxes	137			93		275			123
Provision for income taxes	41			23		76			18
Income from continuing operations	96			70		199			105
Income from discontinued operations, net of tax	—			—		—			17
NET INCOME	96			70		199			122
Less:
Preferred stock dividends	—			—		—			123
Income allocated to participating securities	1			1		2			—
Net income (loss) attributable to common shares	$	95		$	69	$	197		$	(1	)
Basic earnings per common share:
Income (loss) from continuing operations	$	0.54		$	0.40	$	1.12		$	(0.11	)
Net income (loss)	0.54			0.40		1.12			(0.01		)
Diluted earnings per common share:
Income (loss) from continuing operations	0.53			0.39		1.10			(0.11		)
Net income (loss)	0.53			0.39		1.10			(0.01		)
Cash dividends declared on common stock	18			8		35			18
Cash dividends declared per common share	0.10			0.05		0.20			0.10

15

CONSOLIDATED QUARTERLY STATEMENTS OF INCOME (unaudited)

Comerica Incorporated and Subsidiaries

	Second			First			Fourth			Third			Second		Second Quarter 2011 Compared To:
	Quarter			Quarter			Quarter			Quarter			Quarter		First Quarter 2011					Second Quarter 2010
(in millions, except per share data)	2011			2011			2010			2010			2010		Amount			Percent		Amount			Percent
INTEREST INCOME
Interest and fees on loans	$	369		$	375		$	394		$	399		$	412	$	(6	)	(1	)%	$	(43	)	(10	)%
Interest on investment securities	59			57			49			55			61		2			2		(2		)	(4	)
Interest on short-term investments	3			2			2			2			3		1			9		—			(12	)
Total interest income	431			434			445			456			476		(3		)	(1	)	(45		)	(9	)
INTEREST EXPENSE
Interest on deposits	23			22			24			27			29		1			(1	)	(6		)	(21	)
Interest on short-term borrowings	—			—			1			—			—		—			(46	)	—			(77	)
Interest on medium- and long-term debt	17			17			15			25			25		—			4		(8		)	(30	)
Total interest expense	40			39			40			52			54		1			1		(14		)	(25	)
Net interest income	391			395			405			404			422		(4		)	(1	)	(31		)	(7	)
Provision for loan losses	47			49			57			122			126		(2		)	(4	)	(79		)	(63	)
Net interest income after provision for loan losses	344			346			348			282			296		(2		)	(1	)	48			16
NONINTEREST INCOME
Service charges on deposit accounts	51			52			49			51			52		(1		)	(4	)	(1		)	(5	)
Fiduciary income	39			39			39			38			38		—			2		1			3
Commercial lending fees	21			21			29			22			22		—			4		(1		)	(1	)
Letter of credit fees	18			18			20			19			19		—			(1	)	(1		)	(1	)
Card fees	15			15			15			15			15		—			7		—			6
Foreign exchange income	10			9			11			8			10		1			7		—			(4	)
Bank-owned life insurance	9			8			14			9			9		1			1		—			1
Brokerage fees	6			6			7			6			6		—			(8	)	—			(8	)
Net securities gains	4			2			—			—			1		2			82		3			N/M
Other noninterest income	29			37			31			18			22		(8		)	(20	)	7			32
Total noninterest income	202			207			215			186			194		(5		)	(2	)	8			4
NONINTEREST EXPENSES
Salaries	185			188			205			187			179		(3		)	(1	)	6			3
Employee benefits	50			50			43			47			45		—			(1	)	5			11
Total salaries and employee benefits	235			238			248			234			224		(3		)	(1	)	11			5
Net occupancy expense	38			40			42			40			39		(2		)	(3	)	(1		)	—
Equipment expense	17			15			16			15			15		2			5		2			5
Outside processing fee expense	25			24			27			23			23		1			5		2			8
Software expense	20			23			23			22			22		(3		)	(8	)	(2		)	(4	)
FDIC insurance expense	12			15			15			14			16		(3		)	(16	)	(4		)	(24	)
Legal fees	8			9			9			9			9		(1		)	—		(1		)	—
Advertising expense	7			7			8			7			7		—			—		—			(5	)
Other real estate expense	6			8			5			7			5		(2		)	(35	)	1			9
Litigation and operational losses	5			3			6			2			2		2			60		3			N/M
Merger and restructuring charges	5			—			—			—			—		5			N/M		5			N/M
Provision for credit losses on lending-related commitments	(2		)	(3		)	(3		)	(6		)	—		1			21		(2		)	N/M
Other noninterest expenses	33			36			41			35			35		(3		)	(11	)	(2		)	(8	)
Total noninterest expenses	409			415			437			402			397		(6		)	(1	)	12			3
Income before income taxes	137			138			126			66			93		(1		)	(1	)	44			48
Provision for income taxes	41			35			30			7			23		6			19		18			81
NET INCOME	96			103			96			59			70		(7		)	(7	)	26			37
Less:
Income allocated to participating securities	1			1			1			—			1		—			(6	)	—			N/M
Net income (loss) attributable to common shares	$	95		$	102		$	95		$	59		$	69	$	(7	)	(7	)%	$	26		36	%
Earnings per common share:
Basic	$	0.54		$	0.58		$	0.54		$	0.34		$	0.40	$	(0.04	)	(7	)%	$	0.14		35	%
Diluted	0.53			0.57			0.53			0.33			0.39		(0.04		)	(7	)	0.14			36
Cash dividends declared on common stock	18			17			18			9			8		1			—		10			N/M
Cash dividends declared per common share	0.10			0.10			0.10			0.05			0.05		—			—		0.05			N/M

N/M - Not meaningful

16

ANALYSIS OF THE ALLOWANCE FOR LOAN LOSSES (unaudited)

Comerica Incorporated and Subsidiaries

	2011						2010
(in millions)	2nd Qtr			1st Qtr			4th Qtr			3rd Qtr			2nd Qtr
Balance at beginning of period	$	849		$	901		$	957		$	967		$	987
Loan charge-offs:
Commercial	66			65			43			38			65
Real estate construction:
Commercial Real Estate business line (a)	12			8			34			40			30
Other business lines (b)	—			1			—			1			—
Total real estate construction	12			9			34			41			30
Commercial mortgage:
Commercial Real Estate business line (a)	8			9			9			16			12
Other business lines (b)	23			25			34			40			36
Total commercial mortgage	31			34			43			56			48
Residential mortgage	7			2			5			2			5
Consumer	9			8			15			7			9
Lease financing	—			—			—			—			1
International	—			5			—			1			—
Total loan charge-offs	125			123			140			145			158
Recoveries on loans previously charged-off:
Commercial	13			4			7			7			4
Real estate construction	5			2			3			1			6
Commercial mortgage	5			9			10			2			1
Residential mortgage	1			—			1			—			—
Consumer	1			1			2			1			1
Lease financing	6			5			4			1			—
International	4			1			—			1			—
Total recoveries	35			22			27			13			12
Net loan charge-offs	90			101			113			132			146
Provision for loan losses	47			49			57			122			126
Balance at end of period	$	806		$	849		$	901		$	957		$	967
Allowance for loan losses as a percentage of total loans	2.06		%	2.17		%	2.24		%	2.38		%	2.38		%
Net loan charge-offs as a percentage of average total loans	0.92			1.03			1.13			1.32			1.44
Net credit-related charge-offs as a percentage of average total loans	0.92			1.03			1.13			1.32			1.44

(a) Primarily charge-offs of loans to real estate investors and developers.

(b) Primarily charge-offs of loans secured by owner-occupied real estate.

ANALYSIS OF THE ALLOWANCE FOR CREDIT LOSSES ON LENDING-RELATED COMMITMENTS (unaudited)

Comerica Incorporated and Subsidiaries

	2011						2010
(in millions)	2nd Qtr			1st Qtr			4th Qtr			3rd Qtr			2nd Qtr
Balance at beginning of period	$	32		$	35		$	38		$	44		$	44
Add: Provision for credit losses on lending-related commitments	(2		)	(3		)	(3		)	(6		)	—
Balance at end of period	$	30		$	32		$	35		$	38		$	44
Unfunded lending-related commitments sold	$	3		$	2		$	—		$	—		$	2

17

NONPERFORMING ASSETS (unaudited)

Comerica Incorporated and Subsidiaries

	2011						2010
(in millions)	2nd Qtr			1st Qtr			4th Qtr			3rd Qtr			2nd Qtr
SUMMARY OF NONPERFORMING ASSETS AND PAST DUE LOANS
Nonaccrual loans:
Business loans:
Commercial	$	261		$	226		$	252		$	258		$	239
Real estate construction:
Commercial Real Estate business line (a)	137			195			259			362			385
Other business lines (b)	2			3			4			4			4
Total real estate construction	139			198			263			366			389
Commercial mortgage:
Commercial Real Estate business line (a)	186			197			181			153			135
Other business lines (b)	269			293			302			304			257
Total commercial mortgage	455			490			483			457			392
Lease financing	6			7			7			10			11
International	7			4			2			2			3
Total nonaccrual business loans	868			925			1,007			1,093			1,034
Retail loans:
Residential mortgage	60			58			55			59			53
Consumer:
Home equity	4			6			5			5			7
Other consumer	9			7			13			6			4
Total consumer	13			13			18			11			11
Total nonaccrual retail loans	73			71			73			70			64
Total nonaccrual loans	941			996			1,080			1,163			1,098
Reduced-rate loans	33			34			43			28			23
Total nonperforming loans	974			1,030			1,123			1,191			1,121
Foreclosed property	70			74			112			120			93
Total nonperforming assets	$	1,044		$	1,104		$	1,235		$	1,311		$	1,214
Nonperforming loans as a percentage of total loans	2.49		%	2.63		%	2.79		%	2.96		%	2.76		%
Nonperforming assets as a percentage of total loans and foreclosed property	2.66			2.81			3.06			3.24			2.98
Allowance for loan losses as a percentage of total nonperforming loans	83			82			80			80			86
Loans past due 90 days or more and still accruing	$	64		$	72		$	62		$	104		$	115
ANALYSIS OF NONACCRUAL LOANS
Nonaccrual loans at beginning of period	$	996		$	1,080		$	1,163		$	1,098		$	1,145
Loans transferred to nonaccrual (c)	163			166			180			294			199
Nonaccrual business loan gross charge-offs (d)	(109		)	(111		)	(120		)	(136		)	(143		)
Loans transferred to accrual status (c)	—			(4		)	(4		)	(10		)	—
Nonaccrual business loans sold (e)	(9		)	(60		)	(41		)	(12		)	(47		)
Payments/Other (f)	(100		)	(75		)	(98		)	(71		)	(56		)
Nonaccrual loans at end of period	$	941		$	996		$	1,080		$	1,163		$	1,098

(a) Primarily loans to real estate investors and developers.

(b) Primarily loans secured by owner-occupied real estate.

(c) Based on an analysis of nonaccrual loans with book balances greater than $2 million.

(d) Analysis of gross loan charge-offs:

Nonaccrual business loans	$	109	$	111	$	120	$	136	$	143
Performing watch list loans	—		2		—		—		1
Consumer and residential mortgage loans	16		10		20		9		14
Total gross loan charge-offs	$	125	$	123	$	140	$	145	$	158

(e) Analysis of loans sold:

Nonaccrual business loans	$	9	$	60	$	41	$	12	$	47
Performing watch list loans	6		35		29		7		15
Total loans sold	$	15	$	95	$	70	$	19	$	62

(f) Includes net changes related to nonaccrual loans with balances less than $2 million, payments on nonaccrual loans with book balances greater than $2 million and transfers of nonaccrual loans to foreclosed property. Excludes business loan gross charge-offs and business nonaccrual loans sold.

18

ANALYSIS OF NET INTEREST INCOME (FTE) (unaudited)

Comerica Incorporated and Subsidiaries

	Six Months Ended
	June 30, 2011							June 30, 2010
	Average					Average		Average					Average
(dollar amounts in millions)	Balance			Interest		Rate		Balance			Interest		Rate
Commercial loans	$	21,586		$	396	3.70	%	$	20,961		$	411	3.95	%
Real estate construction loans	2,029			36		3.62		3,185			48		3.03
Commercial mortgage loans	9,713			191		3.96		10,380			216		4.19
Residential mortgage loans	1,562			42		5.37		1,620			44		5.43
Consumer loans	2,262			39		3.42		2,464			44		3.57
Lease financing	972			17		3.56		1,119			21		3.73
International loans	1,237			24		3.83		1,261			25		4.00
Business loan swap income	—			1		—		—			17		—
Total loans	39,361			746		3.82		40,990			826		4.06
Auction-rate securities available-for-sale	527			2		0.80		847			5		1.06
Other investment securities available-for-sale	6,832			114		3.39		6,475			118		3.72
Total investment securities available-for-sale	7,359			116		3.19		7,322			123		3.40
Federal funds sold and securities purchased under agreements to resell	2			—		0.32		1			—		1.17
Interest-bearing deposits with banks (a)	2,897			4		0.25		3,944			5		0.25
Other short-term investments	124			1		2.05		128			1		1.70
Total earning assets	49,743			867		3.51		52,385			955		3.67
Cash and due from banks	878							792
Allowance for loan losses	(883		)					(1,048		)
Accrued income and other assets	4,410							4,756
Total assets	$	54,148						$	56,885
Money market and NOW deposits	$	18,003		23		0.26		$	15,709		25		0.32
Savings deposits	1,443			1		0.09		1,407			—		0.07
Customer certificates of deposit	5,559			20		0.73		6,049			30		0.97
Total interest-bearing core deposits	25,005			44		0.36		23,165			55		0.48
Other time deposits	—			—		—		584			9		3.18
Foreign office time deposits	413			1		0.50		453			—		0.22
Total interest-bearing deposits	25,418			45		0.36		24,202			64		0.54
Short-term borrowings	103			—		0.21		241			—		0.19
Medium- and long-term debt	5,974			34		1.15		10,169			51		0.99
Total interest-bearing sources	31,495			79		0.51		34,612			115		0.67
Noninterest-bearing deposits	15,623							14,923
Accrued expenses and other liabilities	1,126							1,067
Total shareholders’ equity	5,904							6,283
Total liabilities and shareholders’ equity	$	54,148						$	56,885
Net interest income/rate spread (FTE)				$	788	3.00					$	840	3.00
FTE adjustment				$	2						$	3
Impact of net noninterest-bearing sources of funds						0.19							0.23
Net interest margin (as a percentage of average earning assets) (FTE) (a)						3.19	%						3.23	%

(a) Excess liquidity, represented by average balances deposited with the Federal Reserve Bank, reduced the net interest margin by 18 basis points and 24 basis points year-to-date in 2011 and 2010, respectively. Excluding excess liquidity, the net interest margin would have been 3.37% in 2011 and 3.47% in 2010. See Reconciliation of Non-GAAP Financial Measures.

19

ANALYSIS OF NET INTEREST INCOME (FTE) (unaudited)

Comerica Incorporated and Subsidiaries

	Three Months Ended
	June 30, 2011							March 31, 2011							June 30, 2010
	Average					Average		Average					Average		Average					Average
(dollar amounts in millions)	Balance			Interest		Rate		Balance			Interest		Rate		Balance			Interest		Rate
Commercial loans	$	21,677		$	196	3.65	%	$	21,496		$	200	3.76	%	$	20,910		$	206	3.95	%
Real estate construction loans	1,881			17		3.75		2,179			19		3.51		2,987			23		3.13
Commercial mortgage loans	9,636			96		3.98		9,790			95		3.95		10,372			109		4.20
Residential mortgage loans	1,525			21		5.50		1,599			21		5.24		1,607			22		5.44
Consumer loans	2,243			20		3.42		2,281			19		3.42		2,448			22		3.56
Lease financing	958			8		3.50		987			9		3.62		1,108			10		3.72
International loans	1,254			12		3.80		1,219			12		3.87		1,240			13		4.07
Business loan swap income	—			—		—		—			1		—		—			9		—
Total loans	39,174			370		3.79		39,551			376		3.85		40,672			414		4.07
Auction-rate securities available-for-sale	500			1		0.71		554			1		0.88		816			3		1.19
Other investment securities available-for-sale	6,907			58		3.40		6,757			56		3.37		6,446			58		3.71
Total investment securities available-for-sale	7,407			59		3.20		7,311			57		3.17		7,262			61		3.41
Federal funds sold and securities purchased under agreements to resell	2			—		0.33		3			—		0.32		1			—		1.35
Interest-bearing deposits with banks (a)	3,433			3		0.25		2,354			1		0.26		3,768			3		0.25
Other short-term investments	120			—		1.39		128			1		2.68		132			—		1.65
Total earning assets	50,136			432		3.46		49,347			435		3.57		51,835			478		3.70
Cash and due from banks	872							884							795
Allowance for loan losses	(859		)					(908		)					(1,037		)
Accrued income and other assets	4,368							4,452							4,665
Total assets	$	54,517						$	53,775						$	56,258
Money market and NOW deposits	$	18,207		11		0.26		$	17,797		12		0.26		$	16,354		13		0.32
Savings deposits	1,465			1		0.09		1,421			—		0.09		1,429			—		0.07
Customer certificates of deposit	5,609			10		0.70		5,509			10		0.76		5,927			15		0.92
Total interest-bearing core deposits	25,281			22		0.35		24,727			22		0.36		23,710			28		0.45
Other time deposits	—			—		—		—			—		—		295			1		2.14
Foreign office time deposits	413			1		0.52		412			—		0.49		448			—		0.23
Total interest-bearing deposits	25,694			23		0.35		25,139			22		0.37		24,453			29		0.47
Short-term borrowings	112			—		0.14		94			—		0.31		248			—		0.27
Medium- and long-term debt	5,821			17		1.20		6,128			17		1.10		9,571			25		1.04
Total interest-bearing sources	31,627			40		0.51		31,361			39		0.51		34,272			54		0.63
Noninterest-bearing deposits	15,786							15,459							15,218
Accrued expenses and other liabilities	1,132							1,120							1,060
Total shareholders’ equity	5,972							5,835							5,708
Total liabilities and shareholders’ equity	$	54,517						$	53,775						$	56,258
Net interest income/rate spread (FTE)				$	392	2.95					$	396	3.06					$	424	3.07
FTE adjustment				$	1						$	1						$	2
Impact of net noninterest-bearing sources of funds						0.19							0.19							0.21
Net interest margin (as a percentage of average earning assets) (FTE) (a)						3.14	%						3.25	%						3.28	%

(a) Excess liquidity, represented by average balances deposited with the Federal Reserve Bank, reduced the net interest margin by 21 basis points and by 14 points in the second and first quarters of 2011, respectively and by 23 basis points in the second quarter of 2010. Excluding excess liquidity, the net interest margin would have been 3.35%, 3.39% and 3.51% in each respective period. See Reconciliation of Non-GAAP Financial Measures.

20

CONSOLIDATED STATISTICAL DATA (unaudited)

Comerica Incorporated and Subsidiaries

	June 30,			March 31,			December 31,			September 30,			June 30,
(in millions, except per share data)	2011			2011			2010			2010			2010
Commercial loans:
Floor plan	$	1,478		$	1,893		$	2,017		$	1,693		$	1,586
Other	20,574			19,467			20,128			19,739			19,565
Total commercial loans	22,052			21,360			22,145			21,432			21,151
Real estate construction loans:
Commercial Real Estate business line (a)	1,343			1,606			1,826			2,023			2,345
Other business lines (b)	385			417			427			421			429
Total real estate construction loans	1,728			2,023			2,253			2,444			2,774
Commercial mortgage loans:
Commercial Real Estate business line (a)	1,930			1,918			1,937			2,091			2,035
Other business lines (b)	7,649			7,779			7,830			8,089			8,283
Total commercial mortgage loans	9,579			9,697			9,767			10,180			10,318
Residential mortgage loans	1,491			1,550			1,619			1,586			1,606
Consumer loans:
Home equity	1,622			1,661			1,704			1,736			1,761
Other consumer	610			601			607			667			682
Total consumer loans	2,232			2,262			2,311			2,403			2,443
Lease financing	949			958			1,009			1,053			1,084
International loans	1,162			1,326			1,132			1,182			1,226
Total loans	$	39,193		$	39,176		$	40,236		$	40,280		$	40,602
Goodwill	$	150		$	150		$	150		$	150		$	150
Loan servicing rights	4			4			5			5			6
Tier 1 common capital ratio (c) (d)	10.53		%	10.35		%	10.13		%	9.96		%	9.81		%
Tier 1 risk-based capital ratio (d)	10.53			10.35			10.13			9.96			10.64
Total risk-based capital ratio (d)	14.81			14.80			14.54			14.37			15.03
Leverage ratio (d)	11.39			11.37			11.26			10.91			11.36
Tangible common equity ratio (c)	10.90			10.43			10.54			10.39			10.11
Book value per common share	$	34.15		$	33.25		$	32.82		$	33.19		$	32.85
Market value per share for the quarter:
High	39.00			43.53			43.44			40.21			45.85
Low	33.08			36.20			34.43			33.11			35.44
Close	34.57			36.72			42.24			37.15			36.83
Quarterly ratios:
Return on average common shareholders’ equity	6.41		%	7.08		%	6.53		%	4.07		%	4.89		%
Return on average assets	0.70			0.77			0.71			0.43			0.50
Efficiency ratio	69.33			69.05			70.38			67.88			64.47
Number of banking centers	446			445			444			441			437
Number of employees - full time equivalent	8,915			8,955			9,001			9,075			9,107

(a) Primarily loans to real estate investors and developers.

(b) Primarily loans secured by owner-occupied real estate.

(c) See Reconciliation of Non-GAAP Financial Measures.

(d) June 30, 2011 ratios are estimated.

21

PARENT COMPANY ONLY BALANCE SHEETS (unaudited)

Comerica Incorporated

	June 30,			December 31,			June 30,
(in millions, except share data)	2011			2010			2010
ASSETS
Cash and due from subsidiary bank	$	14		$	—		$	15
Short-term investments with subsidiary bank	413			327			659
Other short-term investments	90			86			83
Investment in subsidiaries, principally banks	6,122			5,957			5,961
Premises and equipment	3			4			4
Other assets	162			181			190
Total assets	$	6,804		$	6,555		$	6,912
LIABILITIES AND SHAREHOLDERS’ EQUITY
Medium- and long-term debt	$	635		$	635		$	999
Other liabilities	131			127			121
Total liabilities	766			762			1,120
Common stock - $5 par value:
Authorized - 325,000,000 shares
Issued - 203,878,110 shares	1,019			1,019			1,019
Capital surplus	1,472			1,481			1,467
Accumulated other comprehensive loss	(308		)	(389		)	(240		)
Retained earnings	5,395			5,247			5,124
Less cost of common stock in treasury - 27,092,427 shares at 6/30/11, 27,342,518 shares at 12/31/10, and 27,561,412 shares at 6/30/10	(1,540		)	(1,565		)	(1,578		)
Total shareholders’ equity	6,038			5,793			5,792
Total liabilities and shareholders’ equity	$	6,804		$	6,555		$	6,912

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (unaudited)

Comerica Incorporated and Subsidiaries

											Accumulated
				Common Stock							Other									Total
	Preferred			Shares				Capital			Comprehensive			Retained			Treasury			Shareholders’
(in millions, except per share data)	Stock			Outstanding		Amount		Surplus			Loss			Earnings			Stock			Equity
BALANCE AT DECEMBER 31, 2009	$	2,151		151.2		$	894	$	740		$	(336	)	$	5,161		$	(1,581	)	$	7,029
Net income	—			—		—		—			—			122			—			122
Other comprehensive income, net of tax	—			—		—		—			96			—			—			96
Total comprehensive income																				218
Cash dividends declared on preferred stock	—			—		—		—			—			(38		)	—			(38		)
Cash dividends declared on common stock ($0.10 per share)	—			—		—		—			—			(18		)	—			(18		)
Purchase of common stock	—			—		—		—			—			—			(4		)	(4		)
Issuance of common stock	—			25.1		125		724			—			—			—			849
Redemption of preferred stock	(2,250		)	—		—		—			—			—			—			(2,250		)
Redemption discount accretion on preferred stock	94			—		—		—			—			(94		)	—			—
Accretion of discount on preferred stock	5			—		—		—			—			(5		)	—			—
Net issuance of common stock under employee stock plans	—			—		—		(5		)	—			(4		)	6			(3		)
Share-based compensation	—			—		—		11			—			—			—			11
Other	—			—		—		(3		)	—			—			1			(2		)
BALANCE AT JUNE 30, 2010	$	—		176.3		$	1,019	$	1,467		$	(240	)	$	5,124		$	(1,578	)	$	5,792
BALANCE AT DECEMBER 31, 2010	$	—		176.5		$	1,019	$	1,481		$	(389	)	$	5,247		$	(1,565	)	$	5,793
Net income	—			—		—		—			—			199			—			199
Other comprehensive income, net of tax	—			—		—		—			81			—			—			81
Total comprehensive income																				280
Cash dividends declared on common stock ($0.20 per share)	—			—		—		—			—			(35		)	—			(35		)
Purchase of common stock	—			(0.5	)	—		—			—			—			(21		)	(21		)
Net issuance of common stock under employee stock plans	—			0.8		—		(30		)	—			(16		)	46			—
Share-based compensation	—			—		—		21			—			—			—			21
BALANCE AT JUNE 30, 2011	$	—		176.8		$	1,019	$	1,472		$	(308	)	$	5,395		$	(1,540	)	$	6,038

22

BUSINESS SEGMENT FINANCIAL RESULTS (unaudited)

Comerica Incorporated and Subsidiaries

(dollar amounts in millions)	Business			Retail			Wealth
Three Months Ended June 30, 2011	Bank			Bank			Management			Finance			Other			Total
Earnings summary:
Net interest income (expense) (FTE)	$	342		$	141		$	48		$	(147	)	$	8		$	392
Provision for loan losses	6			24			14			—			3			47
Noninterest income	79			46			63			11			3			202
Noninterest expenses	158			162			76			3			10			409
Provision (benefit) for income taxes (FTE)	81			4			9			(52		)	—			42
Net income (loss)	$	176		$	(3	)	$	12		$	(87	)	$	(2	)	$	96
Net credit-related charge-offs	$	54		$	22		$	14		$	—		$	—		$	90
Selected average balances:
Assets	$	29,893		$	5,453		$	4,728		$	9,406		$	5,037		$	54,517
Loans	29,380			4,999			4,742			48			5			39,174
Deposits	20,396			17,737			2,978			239			130			41,480
Statistical data:
Return on average assets (a)	2.35		%	(0.06		)%	1.03		%	N/M			N/M			0.70		%
Net interest margin (b)	4.65			3.22			4.07			N/M			N/M			3.14
Efficiency ratio	37.41			86.48			71.40			N/M			N/M			69.33

	Business			Retail			Wealth
Three Months Ended March 31, 2011	Bank			Bank			Management			Finance			Other		Total
Earnings summary:
Net interest income (expense) (FTE)	$	341		$	139		$	44		$	(135	)	$	7	$	396
Provision for loan losses	18			23			8			—			—		49
Noninterest income	77			42			64			16			8		207
Noninterest expenses	160			162			78			3			12		415
Provision (benefit) for income taxes (FTE)	73			(2		)	8			(46		)	3		36
Net income (loss)	$	167		$	(2	)	$	14		$	(76	)	$	—	$	103
Net credit-related charge-offs	$	73		$	23		$	5		$	—		$	—	$	101
Selected average balances:
Assets	$	30,091		$	5,558		$	4,809		$	9,314		$	4,003	$	53,775
Loans	29,609			5,106			4,807			22			7		39,551
Deposits	20,084			17,360			2,800			249			105		40,598
Statistical data:
Return on average assets (a)	2.22		%	(0.05		)%	1.14		%	N/M			N/M		0.77		%
Net interest margin (b)	4.66			3.25			3.76			N/M			N/M		3.25
Efficiency ratio	38.14			89.19			74.38			N/M			N/M		69.05

	Business			Retail			Wealth
Three Months Ended June 30, 2010	Bank			Bank			Management			Finance			Other			Total
Earnings summary:
Net interest income (expense) (FTE)	$	351		$	134		$	45		$	(103	)	$	(3	)	$	424
Provision for loan losses	83			20			19			—			4			126
Noninterest income	78			42			61			13			—			194
Noninterest expenses	157			160			79			2			(1		)	397
Provision (benefit) for income taxes (FTE)	54			(1		)	3			(35		)	4			25
Net income (loss)	$	135		$	(3	)	$	5		$	(57	)	$	(10	)	$	70
Net credit-related charge-offs	$	113		$	22		$	11		$	—		$	—		$	146
Selected average balances:
Assets	$	30,609		$	5,937		$	4,903		$	9,343		$	5,466		$	56,258
Loans	30,353			5,446			4,840			36			(3		)	40,672
Deposits	19,069			16,930			2,924			653			95			39,671
Statistical data:
Return on average assets (a)	1.75		%	(0.06		)%	0.43		%	N/M			N/M			0.50		%
Net interest margin (b)	4.63			3.17			3.73			N/M			N/M			3.28
Efficiency ratio	36.92			89.14			77.57			N/M			N/M			64.47

(a) Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

(b) Net interest margin is calculated based on the greater of average earning assets or average deposits and purchased funds.

FTE - Fully Taxable Equivalent

N/M - Not Meaningful

23

MARKET SEGMENT FINANCIAL RESULTS (unaudited)

Comerica Incorporated and Subsidiaries

																			Finance
(dollar amounts in millions)													Other						& Other
Three Months Ended June 30, 2011	Midwest			Western			Texas			Florida			Markets			International			Businesses			Total
Earnings summary:
Net interest income (expense) (FTE)	$	204		$	166		$	89		$	12		$	41		$	19		$	(139	)	$	392
Provision for loan losses	15			20			(2		)	11			5			(5		)	3			47
Noninterest income	100			37			25			4			13			9			14			202
Noninterest expenses	183			108			63			12			21			9			13			409
Provision (benefit) for income taxes (FTE)	44			25			20			(2		)	(2		)	9			(52		)	42
Net income (loss)	$	62		$	50		$	33		$	(5	)	$	30		$	15		$	(89	)	$	96
Net credit-related charge-offs (recoveries)	$	37		$	26		$	3		$	15		$	11		$	(2	)	$	—		$	90
Selected average balances:
Assets	$	14,267		$	12,329		$	7,081		$	1,534		$	3,101		$	1,762		$	14,443		$	54,517
Loans	14,051			12,121			6,871			1,565			2,823			1,690			53			39,174
Deposits	18,319			12,458			6,175			396			2,451			1,312			369			41,480
Statistical data:
Return on average assets (a)	1.28		%	1.48		%	1.84		%	(1.29		)%	3.89		%	3.33		%	N/M			0.70		%
Net interest margin (b)	4.46			5.35			5.19			3.14			5.88			4.40			N/M			3.14
Efficiency ratio	60.30			53.19			55.16			77.62			40.47			33.16			N/M			69.33

																			Finance
													Other						& Other
Three Months Ended March 31, 2011	Midwest			Western			Texas			Florida			Markets			International			Businesses			Total
Earnings summary:
Net interest income (expense) (FTE)	$	203		$	164		$	87		$	11		$	41		$	18		$	(128	)	$	396
Provision for loan losses	34			11			4			8			(7		)	(1		)	—			49
Noninterest income	100			37			23			4			11			8			24			207
Noninterest expenses	188			109			61			12			21			9			15			415
Provision (benefit) for income taxes (FTE)	28			30			16			(1		)	—			6			(43		)	36
Net income (loss)	$	53		$	51		$	29		$	(4	)	$	38		$	12		$	(76	)	$	103
Net credit-related charge-offs	$	46		$	26		$	8		$	8		$	9		$	4		$	—		$	101
Selected average balances:
Assets	$	14,307		$	12,590		$	7,031		$	1,553		$	3,242		$	1,735		$	13,317		$	53,775
Loans	14,104			12,383			6,824			1,580			2,960			1,671			29			39,551
Deposits	18,230			12,235			5,786			367			2,298			1,328			354			40,598
Statistical data:
Return on average assets (a)	1.08		%	1.54		%	1.65		%	(0.93		)%	4.70		%	2.79		%	N/M			0.77		%
Net interest margin (b)	4.49			5.37			5.17			2.82			5.73			4.34			N/M			3.25
Efficiency ratio	61.99			54.36			55.39			80.08			42.38			34.62			N/M			69.05

																			Finance
													Other						& Other
Three Months Ended June 30, 2010	Midwest			Western			Texas			Florida			Markets			International			Businesses			Total
Earnings summary:
Net interest income (expense) (FTE)	$	211		$	163		$	81		$	12		$	44		$	19		$	(106	)	$	424
Provision for loan losses	34			27			(1		)	17			50			(5		)	4			126
Noninterest income	97			33			23			4			15			9			13			194
Noninterest expenses	180			110			65			12			21			8			1			397
Provision (benefit) for income taxes (FTE)	33			21			14			(5		)	(16		)	9			(31		)	25
Net income (loss)	$	61		$	38		$	26		$	(8	)	$	4		$	16		$	(67	)	$	70
Net credit-related charge-offs	$	44		$	47		$	8		$	7		$	40		$	—		$	—		$	146
Selected average balances:
Assets	$	14,626		$	13,006		$	6,652		$	1,576		$	3,934		$	1,655		$	14,809		$	56,258
Loans	14,592			12,792			6,428			1,575			3,661			1,591			33			40,672
Deposits	17,988			11,951			5,316			404			2,212			1,052			748			39,671
Statistical data:
Return on average assets (a)	1.25		%	1.15		%	1.54		%	(2.18		)%	0.46		%	3.90		%	N/M			0.50		%
Net interest margin (b)	4.66			5.13			5.05			2.94			4.91			4.62			N/M			3.28
Efficiency ratio	58.16			56.15			62.38			76.90			38.26			30.48			N/M			64.47

(a) Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

(b) Net interest margin is calculated based on the greater of average earning assets or average deposits and purchased funds.

FTE - Fully Taxable Equivalent

N/M - Not Meaningful

24

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES (unaudited) (page 1 of 2)

Comerica Incorporated and Subsidiaries

	Six Months Ended June 30,
(dollar amounts in millions)	2011			2010
Impact of Excess Liquidity on Net Interest Margin (FTE):
Net interest income (FTE)	$	788		$	840
Less:
Interest earned on excess liquidity (a)	3			5
Net interest income (FTE), excluding excess liquidity	$	785		$	835
Average earning assets	$	49,743		$	52,385
Less:
Average net unrealized gains on investment securities available-for-sale	48			71
Average earning assets for net interest margin (FTE)	49,695			52,314
Less:
Excess liquidity (a)	2,843			3,905
Average earning assets for net interest margin (FTE), excluding excess liquidity	$	46,852		$	48,409
Net interest margin (FTE)	3.19		%	3.23		%
Net interest margin (FTE), excluding excess liquidity	3.37			3.47
Impact of excess liquidity on net interest margin (FTE)	(0.18		)	(0.24		)

	2011						2010
	2nd Qtr			1st Qtr			4th Qtr			3rd Qtr			2nd Qtr
Impact of Excess Liquidity on Net Interest Margin (FTE):
Net interest income (FTE)	$	392		$	396		$	406		$	405		$	424
Less:
Interest earned on excess liquidity (a)	2			1			1			2			2
Net interest income (FTE), excluding excess liquidity	$	390		$	395		$	405		$	403		$	422
Average earning assets	$	50,136		$	49,347		$	49,102		$	50,189		$	51,835
Less:
Average net unrealized gains on investment securities available-for-sale	74			22			139			180			80
Average earning assets for net interest margin (FTE)	50,062			49,325			48,963			50,009			51,755
Less:
Excess liquidity (a)	3,382			2,297			1,793			2,983			3,719
Average earning assets for net interest margin (FTE), excluding excess liquidity	$	46,680		$	47,028		$	47,170		$	47,026		$	48,036
Net interest margin (FTE)	3.14		%	3.25		%	3.29		%	3.23		%	3.28		%
Net interest margin (FTE), excluding excess liquidity	3.35			3.39			3.41			3.42			3.51
Impact of excess liquidity on net interest margin (FTE)	(0.21		)	(0.14		)	(0.12		)	(0.19		)	(0.23		)

(a) Excess liquidity represented by interest earned on and average balances deposited with the FRB.

The net interest margin (FTE), excluding excess liquidity, removes interest earned on balances deposited with the FRB from net interest income (FTE) and average balances deposited with the FRB from average earning assets from the numerator and denominator of the net interest margin (FTE) ratio, respectively. Comerica believes this measurement provides meaningful information to investors, regulators, management and others of the impact on net interest income and net interest margin resulting from Comerica’s short-term investment in low yielding instruments.

25

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES (unaudited) (page 2 of 2)

Comerica Incorporated and Subsidiaries

	June 30,			March 31,			December 31,			September 30,			June 30,
	2011			2011			2010			2010			2010
Tier 1 Common Capital Ratio:
Tier 1 capital (a) (b)	$	6,193		$	6,107		$	6,027		$	5,940		$	6,371
Less:
Trust preferred securities	—			—			—			—			495
Tier 1 common capital (b)	$	6,193		$	6,107		$	6,027		$	5,940		$	5,876
Risk-weighted assets (a) (b)	$	58,790		$	58,998		$	59,506		$	59,608		$	59,877
Tier 1 capital ratio (b)	10.53		%	10.35		%	10.13		%	9.96		%	10.64		%
Tier 1 common capital ratio (b)	10.53			10.35			10.13			9.96			9.81
Tangible Common Equity Ratio:
Total common shareholders’ equity	$	6,038		$	5,877		$	5,793		$	5,857		$	5,792
Less:
Goodwill	150			150			150			150			150
Other intangible assets	4			5			6			6			6
Tangible common equity	$	5,884		$	5,722		$	5,637		$	5,701		$	5,636
Total assets	$	54,141		$	55,017		$	53,667		$	55,004		$	55,885
Less:
Goodwill	150			150			150			150			150
Other intangible assets	4			5			6			6			6
Tangible assets	$	53,987		$	54,862		$	53,511		$	54,848		$	55,729
Common equity ratio	11.15		%	10.68		%	10.80		%	10.65		%	10.36		%
Tangible common equity ratio	10.90			10.43			10.54			10.39			10.11

(a) Tier 1 capital and risk-weighted assets as defined by regulation.

(b) June 30, 2011 Tier 1 capital and risk-weighted assets are estimated.

The Tier 1 common capital ratio removes preferred stock and qualifying trust preferred securities from Tier 1 capital as defined by and calculated in conformity with bank regulations.  The tangible common equity removes preferred stock and the effect of intangible assets from capital and the effect of intangible assets from total assets.  Comerica believes these measurements are meaningful measures of capital adequacy used by investors, regulators, management and others to evaluate the adequacy of common equity and to compare against other companies in the industry.

26