First Quarter 2017 Financial Review

Credit Quality Strong Energy business line reserve allocation¹ ~7% of Energy loans Allowance for Credit Losses ($ in millions) Allowance for Loan Losses as a % of Total Loans Energy Credit Metrics $ in millions Loans Criticized NAL NCO³ 770 772 772 771 754 E&P $1,360 $649 $234 $9 Midstream 327 38 7 1.47 1.45 1.48 1.49 1.47 Services 268 184 25 4 Total Energy $1,955 Q/Q change $871 $266 $13 (295) (283) (62) (2) 1Q16 2Q16 3Q16 Criticized Loans² ($ in millions) NALS Criticized as a % of Total Loans 4Q16 1Q17 Portfolio Credit Metrics $ in millions Ex-Energy Total Total loans $46,348 $48,303 % of total 96% 100% Criticized² 1,765 2,636 3,928 3,551 Ratio 3.8% 5.5% 3,261 8.0 7.0 6.6 681 605 631 582 521 1Q16 2Q16 3Q16 4Q16 1Q17 00000 2,856 Q/Q change 63 2,636 (220) Nonaccrual 255 521 5.8 5.5 Ratio 0.6% 1.1% Q/Q change 1 (61) Net charge-offs³ 20 33 Ratio 0.18% 0.28% 3/31/17 'Bank's entire allowance is available to cover any & all losses. Allocation of allowance for energy loans reflects our robust allowance methodology which contains quantitative and qualitative components 2Criticized loans are consistent with regulatory defined Special Mention, Substandard, & Doubtful categories ³Net credit-related charge-offs Comerica Bank 9 Noninterest Income Increased $4MM, or 2% Increased $27MM, or 11%, from 1Q16 Noninterest Income ($ in millions) 272 268 271 267 24 244 1Q16 1Q17 compared to 4Q16 2Q16 3Q16 4Q16 1Q17 + $4MM Deposit service charges + $2MM Investment banking +$1MM Fiduciary - $2MM Card fees +$2MM 4Q16 Net securities loss (related to Visa derivative) +$2MM Deferred comp (offset in noninterest expense) - $2MM Bank-owned life insurance - $2MM Principal investing & warrants Comerica Bank 10

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