Insider Stock Trading History of Potter Stephen N

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Potter Stephen N since year 2005. The trader's CIK number is 1378549. At the time of this reporting, Potter Stephen N is the Vice Chairman of Northern Trust Corp . (stock ticker symbol NTRS). See this page for all insider trading activities at Northern Trust Corp .

Stock purchases, sales, and option exercises reported by insider *Potter Stephen N* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2018-01-31	NTRS	Northern Trust Corp	Sale	7,103	105.55	749,721
2018-01-26	NTRS	Northern Trust Corp	Sale	10,000	106.14	1,061,400
2017-07-05	NTRS	Northern Trust Corp	Option Ex	11,574	52.69	609,834
2017-07-03	NTRS	Northern Trust Corp	Sale	16,895	99.09	1,674,125
2017-07-03	NTRS	Northern Trust Corp	Option Ex	16,895	52.69	890,197
2017-07-05	NTRS	Northern Trust Corp	Sale	11,574	99.07	1,146,636
2017-06-19	NTRS	Northern Trust Corp	Sale	48,110	95.20	4,580,072
2017-06-19	NTRS	Northern Trust Corp	Option Ex	48,110	43.65	2,100,001
2016-11-14	NTRS	Northern Trust Corp	Sale	65,079	81.09	5,277,256
2016-11-14	NTRS	Northern Trust Corp	Option Ex	65,079	52.64	3,425,758
2016-11-11	NTRS	Northern Trust Corp	Sale	6,160	80.00	492,800
2016-11-11	NTRS	Northern Trust Corp	Option Ex	6,160	52.64	324,262
2016-11-09	NTRS	Northern Trust Corp	Option Ex	126,070	64.39	8,117,016
2016-11-09	NTRS	Northern Trust Corp	Sale	126,070	75.78	9,553,584
2015-06-22	NTRS	Northern Trust Corp	Sale	26,042	78.00	2,031,276
2015-06-22	NTRS	Northern Trust Corp	Option Ex	26,042	63.36	1,650,021
2014-07-31	NTRS	Northern Trust Corp	Option Ex	58,836	50.99	3,000,047
2014-07-30	NTRS	Northern Trust Corp	Sale	8,000	68.00	544,000
2014-07-31	NTRS	Northern Trust Corp	Sale	58,836	67.17	3,951,719
2014-07-22	NTRS	Northern Trust Corp	Sale	6,000	66.00	396,000
2014-06-17	NTRS	Northern Trust Corp	Sale	6,000	63.75	382,500
2014-01-08	NTRS	Northern Trust Corp	Option Ex	23,030	52.09	1,199,747
2014-01-08	NTRS	Northern Trust Corp	Sale	23,030	62.00	1,427,860
2013-07-22	NTRS	Northern Trust Corp	Option Ex	1,769	49.12	86,893
2013-07-22	NTRS	Northern Trust Corp	Sale	1,769	59.48	105,225
2013-07-16	NTRS	Northern Trust Corp	Sale	1,150	62.00	71,300
2013-07-16	NTRS	Northern Trust Corp	Option Ex	1,150	52.09	59,909
2013-05-15	NTRS	Northern Trust Corp	Option Ex	30,000	44.47	1,333,950
2013-05-15	NTRS	Northern Trust Corp	Sale	30,000	57.02	1,710,600
2013-04-18	NTRS	Northern Trust Corp	Sale	6,634	52.54	348,556
2013-04-11	NTRS	Northern Trust Corp	Sale	23,231	56.00	1,300,936
2013-04-11	NTRS	Northern Trust Corp	Option Ex	23,231	49.12	1,141,106
2012-04-19	NTRS	Northern Trust Corp	Option Ex	25,614	32.62	835,400
2010-04-22	NTRS	Northern Trust Corp	Option Ex	3,066	32.62	99,997
2009-07-29	NTRS	Northern Trust Corp	Sale	9,000	57.97	521,685
2008-07-18	NTRS	Northern Trust Corp	Sale	19,572	77.28	1,512,485
2008-07-18	NTRS	Northern Trust Corp	Option Ex	19,572	45.16	883,793
2008-04-17	NTRS	Northern Trust Corp	Option Ex	4,428	45.16	199,950
2008-01-18	NTRS	Northern Trust Corp	Option Ex	2,890	34.59	99,973
2007-10-22	NTRS	Northern Trust Corp	Sale	10,000	68.52	685,230
2007-04-23	NTRS	Northern Trust Corp	Option Ex	13,110	34.59	453,514

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Potter Stephen N (Vice Chairman of Northern Trust Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.