Introduction

This page provides a comprehensive analysis of the known insider trading history of Thomas E Richards. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

See Highest Ranking Insiders
Companies with Reported Insider Positions

The SEC filings indicate Thomas E Richards has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:NTRS / Northern Trust Corporation Director 14,435
US:CDW / CDW Corporation See Remarks, Director 127,577
See Remarks, Director 1,083,619
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Thomas E Richards. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Trading History

This table shows the complete list of insider trades made by Thomas E Richards as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change		 Share
Price		 Tran
Value		 Remaining
Value
2021-10-04 2021-10-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 58 14,435 0.40 109.23 6,347 1,576,697
2021-10-04 2021-09-30 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 255 14,377 1.81 107.81 27,500 1,549,935
2021-07-02 2021-07-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 53 14,121 0.37 116.32 6,131 1,642,608
2021-07-02 2021-06-30 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 251 14,069 1.82 115.62 29,066 1,626,629
2021-04-22 2021-04-20 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 1,164 13,817 9.20
2021-04-22 2021-04-20 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 44 12,653 0.35 107.37 4,702 1,358,591
2021-04-02 2021-04-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 44 12,610 0.35 105.63 4,661 1,331,949
2021-04-02 2021-03-31 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 333 12,565 2.72 105.11 35,000 1,320,753
2021-01-05 2021-01-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 47 12,232 0.38 93.14 4,365 1,139,331
2021-01-05 2020-12-31 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 376 12,186 3.18 93.14 35,000 1,134,966
2020-10-02 2020-10-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 52 11,810 0.44 77.05 4,014 909,946
2020-10-02 2020-09-30 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 449 11,758 3.97 77.97 35,000 916,749
2020-07-02 2020-07-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 48 11,309 0.43 76.94 3,682 870,101
2020-07-02 2020-06-30 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 427 11,261 3.94 79.34 33,901 893,445
2020-04-23 2020-04-21 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 1,679 10,834 18.34
2020-04-23 2020-04-21 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 42 9,155 0.46 74.43 3,094 681,382
2020-04-02 2020-04-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 35 9,113 0.38 73.00 2,548 665,256
2020-04-02 2020-03-31 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 398 9,078 4.58 75.46 30,000 685,040
2020-01-03 2020-01-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 22 8,681 0.25 106.24 2,335 922,230
2020-01-03 2019-12-31 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 282 8,659 3.37 106.24 30,000 919,895
2019-12-18 2019-12-17 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -50,000 127,577 -28.16
2019-12-18 2019-12-17 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -900 547,733 -0.16 140.73 -126,657 77,082,402
2019-12-18 2019-12-17 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -13,820 548,633 -2.46 139.66 -1,930,101 76,622,022
2019-12-18 2019-12-17 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -35,280 562,453 -5.90 139.31 -4,914,857 78,355,265
2019-12-18 2019-12-17 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 50,000 597,733 9.13 24.29 1,214,500 14,518,924
2019-12-12 2019-12-12 4 CDW CDW Corp
Common Stock, par value $0.01 		G - Gift -30,043 547,733 -5.20
2019-11-14 2019-11-12 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -23,123 177,577 -11.52
2019-11-14 2019-11-12 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -28,729 0 -100.00
2019-11-14 2019-11-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -437 577,776 -0.08 134.33 -58,702 77,612,590
2019-11-14 2019-11-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -29,085 578,213 -4.79 133.62 -3,886,338 77,260,761
2019-11-14 2019-11-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -22,330 607,298 -3.55 132.72 -2,963,638 80,600,531
2019-11-14 2019-11-12 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 23,123 629,628 3.81 24.29 561,658 15,293,653
2019-11-14 2019-11-12 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 28,729 606,505 4.97 17.00 488,393 10,310,577
2019-10-16 2019-10-15 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -56,000 28,729 -66.09
2019-10-16 2019-10-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -2,585 577,776 -0.45 124.20 -321,057 71,759,723
2019-10-16 2019-10-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -53,415 580,361 -8.43 123.65 -6,604,765 71,761,582
2019-10-16 2019-10-15 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 56,000 633,776 9.69 17.00 952,000 10,774,184
2019-10-02 2019-10-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 23 8,376 0.28 89.88 2,094 752,859
2019-10-02 2019-09-30 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 321 8,353 4.00 93.32 30,000 779,499
2019-09-11 2019-09-10 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -58,333 84,729 -40.77
2019-09-11 2019-09-10 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -200 577,776 -0.03 116.25 -23,250 67,166,408
2019-09-11 2019-09-10 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -1,018 577,976 -0.18 115.38 -117,457 66,686,819
2019-09-11 2019-09-10 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -2,366 578,994 -0.41 114.42 -270,718 66,248,442
2019-09-11 2019-09-10 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -7,070 581,360 -1.20 113.23 -800,536 65,827,342
2019-09-11 2019-09-10 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -29,088 588,430 -4.71 112.25 -3,265,128 66,051,217
2019-09-11 2019-09-10 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -18,591 617,518 -2.92 111.14 -2,066,204 68,630,901
2019-09-11 2019-09-10 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 58,333 636,109 10.10 17.00 991,661 10,813,845
2019-08-15 2019-08-13 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -62,222 143,062 -30.31
2019-08-15 2019-08-13 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -2,000 577,776 -0.34 114.33 -228,660 66,057,079
2019-08-15 2019-08-13 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -55,656 579,776 -8.76 113.77 -6,331,983 65,961,064
2019-08-15 2019-08-13 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -1,400 635,432 -0.22 112.79 -157,906 71,670,325
2019-08-15 2019-08-13 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -3,166 636,832 -0.49 111.65 -353,484 71,102,243
2019-08-15 2019-08-13 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 62,222 639,998 10.77 17.00 1,057,774 10,879,958
2019-07-17 2019-07-15 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -59,574 205,284 -22.49
2019-07-17 2019-07-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -800 577,776 -0.14 116.16 -92,928 67,114,408
2019-07-17 2019-07-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -58,774 578,576 -9.22 115.42 -6,783,695 66,779,190
2019-07-17 2019-07-15 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 59,574 637,350 10.31 17.00 1,012,758 10,834,942
2019-07-02 2019-07-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 17 8,032 0.22 91.65 1,585 736,087
2019-07-02 2019-06-30 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 333 8,014 4.34 90.00 30,000 721,279
2019-06-19 2019-06-18 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -66,667 264,858 -20.11
2019-06-19 2019-06-18 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -43,184 577,776 -6.95 105.68 -4,563,685 61,059,320
2019-06-19 2019-06-18 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -23,483 620,960 -3.64 104.64 -2,457,261 64,977,207
2019-06-19 2019-06-18 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 66,667 644,443 11.54 17.00 1,133,339 10,955,523
2019-06-04 2019-05-31 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -17,180 331,525 -4.93
2019-06-04 2019-05-31 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -200 577,776 -0.03 101.04 -20,208 58,378,442
2019-06-04 2019-05-31 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -28,621 577,976 -4.72 100.51 -2,876,697 58,092,323
2019-06-04 2019-05-31 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -21,707 606,597 -3.45 99.46 -2,158,978 60,332,093
2019-06-04 2019-05-31 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -16,139 628,304 -2.50 98.43 -1,588,562 61,843,918
2019-06-04 2019-05-31 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 17,180 644,443 2.74 17.00 292,060 10,955,523
2019-04-25 2019-04-23 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 1,146 7,681 17.54
2019-04-25 2019-04-23 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 23 6,535 0.35 95.94 2,190 626,956
2019-04-18 2019-04-17 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -16,636 348,705 -4.55
2019-04-18 2019-04-17 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -300 627,263 -0.05 107.38 -32,214 67,355,453
2019-04-18 2019-04-17 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -900 627,563 -0.14 106.65 -95,985 66,929,546
2019-04-18 2019-04-17 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -15,436 628,463 -2.40 105.20 -1,623,867 66,114,260
2019-04-18 2019-04-17 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 16,636 643,899 2.65 17.00 282,812 10,946,275
2019-04-02 2019-04-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 8 6,512 0.12 92.70 747 603,667
2019-04-02 2019-03-31 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 332 6,504 5.38 90.41 30,000 588,026
2019-03-14 2019-03-12 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -15,789 365,341 -4.14
2019-03-14 2019-03-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -9,225 627,263 -1.45 95.91 -884,770 60,160,751
2019-03-14 2019-03-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -6,564 636,488 -1.02 95.17 -624,696 60,574,520
2019-03-14 2019-03-12 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 15,789 643,052 2.52 17.00 268,413 10,931,876
2019-02-14 2019-02-12 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -16,216 381,130 -4.08
2019-02-14 2019-02-12 4 CDW CDW Corp
Common Stock, par value $0.01 		F - Taxes -39,786 627,263 -5.96 81.05 -3,224,655 50,839,630
2019-02-14 2019-02-12 4 CDW CDW Corp
Common Stock, par value $0.01 		A - Award 89,274 667,049 15.45
2019-02-14 2019-02-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -10,516 577,775 -1.79 92.41 -971,784 53,392,173
2019-02-14 2019-02-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -5,700 588,291 -0.96 91.74 -522,918 53,969,802
2019-02-14 2019-02-12 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 16,216 593,991 2.81 17.00 275,672 10,097,844
2019-01-17 2019-01-15 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -18,750 397,346 -4.51
2019-01-17 2019-01-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -6,733 577,775 -1.15 80.25 -540,323 46,366,431
2019-01-17 2019-01-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -12,017 584,508 -2.01 79.78 -958,716 46,632,035
2019-01-17 2019-01-15 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 18,750 596,525 3.25 17.00 318,750 10,140,922
2019-01-03 2019-01-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 6 6,172 0.09 83.59 484 515,932
2019-01-03 2018-12-31 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 359 6,166 6.18 83.59 30,000 515,448
2018-12-14 2018-12-12 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -16,216 416,096 -3.75
2018-12-14 2018-12-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -16,216 577,775 -2.73 91.30 -1,480,521 52,750,843
2018-12-14 2018-12-12 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 16,216 593,991 2.81 17.00 275,672 10,097,844
2018-12-14 2018-12-12 4 CDW CDW Corp
Common Stock, par value $0.01 		G - Gift -22,300 577,775 -3.72
2018-11-15 2018-11-14 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -16,667 432,312 -3.71
2018-11-15 2018-11-14 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -7,201 600,075 -1.19 89.65 -645,570 53,796,709
2018-11-15 2018-11-14 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -4,996 607,276 -0.82 88.60 -442,646 53,804,639
2018-11-15 2018-11-14 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -4,470 612,272 -0.72 87.92 -393,002 53,830,940
2018-11-15 2018-11-14 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 16,667 616,742 2.78 17.00 283,339 10,484,611
2018-10-12 2018-10-11 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -18,182 448,979 -3.89
2018-10-12 2018-10-11 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -11,358 600,075 -1.86 81.67 -927,608 49,008,112
2018-10-12 2018-10-11 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -6,824 611,433 -1.10 81.16 -553,836 49,623,889
2018-10-12 2018-10-11 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 18,182 618,257 3.03 17.00 309,094 10,510,366
2018-10-02 2018-10-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 3 5,807 0.05 103.66 321 602,004
2018-10-02 2018-09-30 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 294 5,804 5.33 102.13 30,000 592,802
2018-09-21 2018-09-19 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -16,667 467,161 -3.44
2018-09-21 2018-09-19 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -16,667 600,075 -2.70 88.92 -1,482,030 53,358,655
2018-09-21 2018-09-19 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 16,667 616,742 2.78 17.00 283,339 10,484,611
2018-08-20 2018-08-16 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -17,143 483,828 -3.42
2018-08-20 2018-08-16 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -17,143 600,075 -2.78 86.15 -1,476,869 51,696,447
2018-08-20 2018-08-16 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 17,143 617,218 2.86 17.00 291,431 10,492,703
2018-07-13 2018-07-12 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		M - Exercise -4,323 500,971 -0.86
2018-07-13 2018-07-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -9,045 600,075 -1.48 85.01 -768,915 51,012,362
2018-07-13 2018-07-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -8,067 609,120 -1.31 84.38 -680,693 51,397,532
2018-07-13 2018-07-12 4 CDW CDW Corp
Common Stock, par value $0.01 		M - Exercise 4,323 617,187 0.71 17.00 73,491 10,492,176
2018-07-03 2018-07-01 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 1 5,511 0.02 102.89 122 566,991
2018-07-03 2018-06-30 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 292 5,509 5.59 102.89 30,000 566,868
2018-06-19 2018-06-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -17,647 612,864 -2.80 82.31 -1,452,525 50,444,823
2018-06-01 2018-05-31 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -1,700 630,511 -0.27 81.25 -138,125 51,229,006
2018-06-01 2018-05-31 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -16,482 632,211 -2.54 80.51 -1,326,966 50,899,295
2018-04-19 2018-04-17 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 1,033 5,218 24.68
2018-04-18 2018-04-16 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -4,700 648,693 -0.72 70.19 -329,893 45,531,750
2018-04-18 2018-04-16 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -9,670 653,393 -1.46 69.75 -674,482 45,574,151
2018-04-03 2018-03-31 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 291 4,185 7.47 103.13 29,999 431,588
2018-03-16 2018-03-14 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -12,919 663,063 -1.91 75.27 -972,413 49,908,740
2018-03-16 2018-03-14 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -300 675,982 -0.04 75.01 -22,503 50,705,398
2018-03-02 2018-03-02 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		A - Award 180,382 180,382
2018-02-15 2018-02-14 4 CDW CDW Corp
Common Stock, par value $0.01 		F - Taxes -42,944 676,282 -5.97 69.49 -2,984,179 46,994,825
2018-02-15 2018-02-14 4 CDW CDW Corp
Common Stock, par value $0.01 		A - Award 91,563 719,226 14.59
2018-02-15 2018-02-13 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -13,700 627,663 -2.14 68.98 -945,026 43,296,201
2018-02-15 2018-02-13 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -939 641,363 -0.15 68.06 -63,908 43,651,173
2018-01-18 2018-01-16 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -13,721 642,302 -2.09 72.93 -1,000,673 46,843,093
2018-01-03 2017-12-31 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 298 3,648 8.90 100.66 29,997 367,208
2017-12-15 2017-12-14 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -2,391 656,023 -0.36 69.18 -165,409 45,383,679
2017-12-15 2017-12-14 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -11,977 658,414 -1.79 68.37 -818,867 45,015,773
2017-12-15 2017-11-28 4 CDW CDW Corp
Common Stock, par value $0.01 		G - Gift -14,830 670,391 -2.16
2017-11-17 2017-11-16 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -15,207 685,221 -2.17 66.25 -1,007,464 45,395,899
2017-10-17 2017-10-13 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -13,800 700,428 -1.93 68.01 -938,538 47,636,116
2017-10-17 2017-10-13 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -703 714,228 -0.10 67.25 -47,277 48,031,840
2017-10-02 2017-09-30 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 325 3,350 10.74 92.13 29,942 308,636
2017-09-11 2017-09-08 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -16,861 714,931 -2.30 58.73 -990,247 41,987,904
2017-08-17 2017-08-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -16,077 731,792 -2.15 61.92 -995,488 45,312,567
2017-07-19 2017-07-17 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -15,733 747,869 -2.06 63.49 -998,888 47,482,210
2017-07-03 2017-06-30 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 307 3,025 11.30 97.55 29,948 295,089
2017-06-16 2017-06-14 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -16,244 763,602 -2.08 61.24 -994,791 46,763,375
2017-05-17 2017-05-15 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale X -17,027 779,846 -2.14 58.73 -1,000,009 45,800,986
2017-04-27 2017-04-25 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 1,214 3,894 45.30
2017-04-03 2017-03-31 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 345 2,718 14.54 86.78 29,939 235,868
2017-03-14 2017-03-14 4 CDW CDW Corp
Common Stock, par value $0.01 		F - Taxes -60,814 796,873 -7.09 59.42 -3,613,568 47,350,200
2017-03-14 2017-03-13 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		A - Award 184,126 184,126
2017-03-14 2017-03-10 4 CDW CDW Corp
Common Stock, par value $0.01 		A - Award 133,068 857,687 18.36
2017-01-03 2016-12-31 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 337 2,373 16.55 88.82 29,932 210,770
2016-10-04 2016-09-30 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 444 2,036 27.89 67.56 29,997 137,552
2016-07-05 2016-06-30 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 459 1,592 40.51 65.31 29,977 103,974
2016-04-20 2016-04-19 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 1,531 2,680 133.25
2016-04-04 2016-03-31 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 438 1,133 63.02 65.48 28,680 74,189
2016-03-11 2016-03-10 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		A - Award 150,792 150,792
2016-01-04 2015-12-31 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 378 695 119.24 72.63 27,454 50,478
2015-10-01 2015-09-30 4 NTRS NORTHERN TRUST CORP
Stock Units 		A - Award 317 317 67.79 21,489 21,489
2015-08-20 2015-08-18 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale -150,000 724,619 -17.15 38.25 -5,737,500 27,716,677
2015-07-22 2015-07-21 4 NTRS NORTHERN TRUST CORP
Common Stock 		A - Award 1,149 1,149
2015-03-10 2015-03-09 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		A - Award 138,926 138,926
2015-03-10 2015-03-09 4/A CDW CDW Corp
Employee Stock Option (Right to Buy) 		A - Award 138,926 138,926
2014-12-10 2014-12-08 4 CDW CDW Corp
Common Stock, par value $0.01 		G - Gift -5,000 874,619 -0.57
2014-12-10 2014-12-08 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale -90,000 879,619 -9.28 33.28 -2,995,200 29,273,720
2014-12-10 2014-06-17 4 CDW CDW Corp
Common Stock, par value $0.01 		G - Gift -17,500 969,619 -1.77
2014-05-30 2014-05-28 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale -96,500 987,119 -8.91 28.35 -2,735,775 27,984,824
2014-03-13 2014-03-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale -132,798 0 -100.00 25.55 -3,392,989
2014-03-13 2014-03-12 4 CDW CDW Corp
Common Stock, par value $0.01 		S - Sale -132,797 0 -100.00 25.55 -3,392,963
2014-03-11 2014-03-10 4 CDW CDW Corp
Employee Stock Option (Right to Buy) 		A - Award 200,700 200,700
2013-06-27 3 CDW CDW Corp
Common Stock, par value $0.01 		1,083,619
2013-06-27 3 CDW CDW Corp
Common Stock, par value $0.01 		132,797
2013-06-27 3 CDW CDW Corp
Common Stock, par value $0.01 		132,798
2013-06-26 3 CDW CDW CORP
Common Stock, par value $0.01 		1,083,619
2013-06-26 3 CDW CDW CORP
Common Stock, par value $0.01 		132,797
2013-06-26 3 CDW CDW CORP
Common Stock, par value $0.01 		132,798
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)