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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
73124	Northern Trust Corp	NTRS	State Commercial Banks (6022)	362723087

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1378549	N Stephen Potter	50 South Lasalle Street Chicago IL 60603	President / Asset Management	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	Explanation
Common Stock	Acquisiton	2017-06-19	48,110	$43.65	91,023	No	4	M	Direct
Common Stock	Disposition	2017-06-19	48,110	$95.20	42,913	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
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	2017-06-19	48,110	$0.00	48,110	$43.65

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2022-02-13	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	50,671	Indirect	By Trust
Common Stock	15,845	Indirect	GRAT
Common Stock	1,270	Indirect	Spouse as Trustee for Daughter
Common Stock	1,270	Indirect	Spouse as Trustee for Son
Common Stock	8,327	Indirect	401(k) as of 3-31-2017

Footnotes

Includes 42,913 shares representing stock units payable automatically on a 1-for-1 basis in shares of the Corporation's common stock.
This transaction was effected pursuant to a trading plan adopted in accordance with SEC Rule 10b5-1.
Price reflects the weighted average sales price from $95.00 to $95.62. Information regarding the number of shares sold at each separate price will be provided by the reporting person upon request.
This option became exercisable in four equal annual installments beginning 2/13/2013.