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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
1188084	L William Morrison	50 South Lasalle Street Chicago IL 60603	Vice Chairman	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	Disposition	2017-10-20	7,251	$95.62	104,895	No	4	F	Direct
Common Stock	Disposition	2017-10-25	11,058	$94.34	93,837	No	4	S	Direct

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	1,200	Indirect	By Spouse
Common Stock	350	Indirect	By Children
Common Stock	2,547	Indirect	401(k) as of 9-30-17

Footnotes

On October 20, 2017, 18,309 already reported stock units vested. Of this amount, 7,251 were withheld in payment of Federal, State and Medicare taxes and the remaining 11,058 were distributed to the reporting person as shares of common stock.
Includes 57,826 stock units payable automatically on a 1-for-1 basis in shares of the Corporation's common stock.
Price reflects the weighted average sales price from $94.32 to $94.39. Information regarding the number of shares sold at each separate price will be provided by the reporting person upon request.