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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
28412	Comerica Inc W	CMA	National Commercial Banks (6021)	000006021

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1501814	R Paul Obermeyer	Comerica Incorporated 1717 Main Street, Mc 6402 Dallas TX 75201	Executive Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2017-08-23	7,471	$70.24	12,670	No	4	S	Direct
Common Stock	Acquisiton	2017-08-23	3,000	$39.10	15,670	No	4	M	Direct
Common Stock	Disposition	2017-08-23	3,000	$70.25	12,670	No	4	S	Direct
Common Stock	Acquisiton	2017-08-23	6,350	$29.60	19,020	No	4	M	Direct
Common Stock	Disposition	2017-08-23	6,350	$70.25	12,670	No	4	S	Direct
Common Stock	Acquisiton	2017-08-23	3,500	$33.79	16,170	No	4	M	Direct
Common Stock	Disposition	2017-08-23	3,500	$70.25	12,670	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2017-08-23	3,000	$0.00	3,000	$39.10
Common Stock	Employee Stock Option (right to buy)	Disposition	2017-08-23	6,350	$0.00	6,350	$29.60
Common Stock	Employee Stock Option (right to buy)	Disposition	2017-08-23	3,500	$0.00	3,500	$33.79

Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
2012-01-25	2021-01-25	No	4	M	Direct
2013-01-24	2022-01-24	No	4	M	Direct
2014-01-22	2023-01-22	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	119	Indirect	By Paul R. and Cindy S. Obermeyer Revocable Trust

Reported Derivative Holdings

Sec. Name	Sec. Type	Price	Date	Expiration Date	Amount	Remaning Holdings	Nature of Ownership
Common Stock	Employee Stock Option (right to buy)	$49.51	2015-01-21	2024-01-21	2,979	2,979	Direct
Common Stock	Employee Stock Option (right to buy)	$42.32	2016-01-27	2025-01-27	3,455	3,255	Direct
Common Stock	Employee Stock Option (right to buy)	$32.97	2017-01-26	2026-01-26	4,025	4,025	Direct
Common Stock	Employee Stock Option (right to buy)	$67.66	2018-01-24	2027-01-24	2,085	2,085	Direct

Expiration Date	Amount	Remaning Holdings	Nature of Ownership
2024-01-21	2,979	2,979	Direct
2025-01-27	3,455	3,255	Direct
2026-01-26	4,025	4,025	Direct
2027-01-24	2,085	2,085	Direct

Footnotes

Includes shares acquired through employee stock plans, shares purchased with reinvested dividends and stock held pursuant to a deferred compensation plan as of August 23, 2017.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.02 to $70.46, inclusive. Thereporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request,full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (3), (4) and (5) to this Form 4.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.11 to $70.49, inclusive.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.09 to $70.60, inclusive.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.09 to $70.51, inclusive.
The options vest in four equal annual installments (based on the original grant amount) beginning on the date indicated in this column.