Focal Communications Corp.

DateInflation Amount Per Share*
7/28/1999**$7.98154***
7/29/1999$7.98154
7/30/1999$7.85
8/2/1999$7.48999
8/3/1999$6.37006
8/4/1999$7.45099
8/5/1999$6.90675
8/6/1999$6.92421
8/9/1999$6.50909
8/10/1999$6.44117
8/11/1999$6.46314
8/12/1999$6.86358
8/13/1999$6.88239
8/16/1999$6.64487
8/17/1999$7.12803
8/18/1999$7.22309
8/19/1999$7.27002
8/20/1999$7.34416
8/23/1999$7.03203
8/24/1999$6.69472
8/25/1999$6.55538
8/26/1999$7.70699
8/27/1999$7.98154
8/30/1999$7.86617
8/31/1999$7.98154
9/1/1999$7.98154
9/2/1999$7.98154
9/3/1999$7.98154
9/7/1999$7.98154
9/8/1999$7.98154
9/9/1999$7.98154
9/10/1999$7.98154
9/13/1999$7.98154
9/14/1999$7.98154
9/15/1999$7.98154
9/16/1999$7.98154
9/17/1999$7.98154
9/20/1999$7.98154
9/21/1999$7.98154
9/22/1999$7.98154
9/23/1999$7.98154
9/24/1999$7.98154
9/27/1999$7.98154
9/28/1999$7.98154
9/29/1999$7.98154
9/30/1999$7.98154
10/1/1999$7.98154
10/4/1999$7.98154
10/5/1999$7.98154
10/6/1999$7.98154
10/7/1999$7.98154
10/8/1999$7.98154
10/11/1999$7.98154
10/12/1999$7.98154
10/13/1999$7.98154
10/14/1999$7.98154
10/15/1999$7.98154
10/18/1999$7.98154
10/19/1999$7.98154
10/20/1999$7.98154
10/21/1999$7.98154
10/22/1999$7.98154
10/25/1999$7.98154
10/26/1999$7.98154
10/27/1999$7.98154
10/28/1999$7.98154
10/29/1999$7.98154
11/1/1999$7.90646
11/2/1999$7.22782
11/3/1999$7.46909
11/4/1999$7.80997
11/5/1999$7.88327
11/8/1999$7.96576
11/9/1999$7.98154
11/10/1999$7.98154
11/11/1999$7.98154
11/12/1999$7.98154
11/15/1999$7.98154
11/16/1999$7.98154
11/17/1999$7.98154
11/18/1999$7.98154
11/19/1999$7.98154
11/22/1999$7.98154
11/23/1999$7.98154
11/24/1999$7.98154
11/26/1999$7.98154
11/29/1999$7.98154
11/30/1999$7.98154
12/1/1999$7.98154
12/2/1999$7.98154
12/3/1999$7.98154
12/6/1999$7.98154
12/7/1999$7.98154
12/8/1999$7.98154
12/9/1999$7.98154
12/10/1999$7.98154
12/13/1999$7.98154
12/14/1999$7.98154
12/15/1999$7.98154
12/16/1999$7.98154
12/17/1999$7.98154
12/20/1999$7.98154
12/21/1999$7.98154
12/22/1999$7.98154
12/23/1999$7.98154
12/27/1999$7.97229
12/28/1999$7.98154
12/29/1999$7.90794
12/30/1999$7.8891
12/31/1999$7.88746
1/3/2000$7.98154
1/4/2000$7.98154
1/5/2000$7.98154
1/6/2000$7.98154
1/7/2000$7.98154
1/10/2000$7.98154
1/11/2000$7.98154
1/12/2000$7.98154
1/13/2000$7.98154
1/14/2000$7.98154
1/18/2000$7.98154
1/19/2000$7.98154
1/20/2000$7.98154
1/21/2000$7.98154
1/24/2000$7.98154
1/25/2000$7.98154
1/26/2000$7.98154
1/27/2000$7.98154
1/28/2000$7.98154
1/31/2000$7.98154
2/1/2000$7.98154
2/2/2000$7.98154
2/3/2000$7.98154
2/4/2000$7.98154
2/7/2000$7.98154
2/8/2000$7.98154
2/9/2000$7.98154
2/10/2000$7.98154
2/11/2000$7.98154
2/14/2000$7.98154
2/15/2000$7.98154
2/16/2000$7.98154
2/17/2000$7.98154
2/18/2000$7.98154
2/22/2000$7.98154
2/23/2000$7.98154
2/24/2000$7.98154
2/25/2000$7.98154
2/28/2000$7.98154
2/29/2000$7.98154
3/1/2000$7.98154
3/2/2000$7.98154
3/3/2000$7.98154
3/6/2000$7.98154
3/7/2000$7.98154
3/8/2000$7.98154
3/9/2000$7.98154
3/10/2000$7.98154
3/13/2000$7.98154
3/14/2000$7.98154
3/15/2000$7.98154
3/16/2000$7.98154
3/17/2000$7.98154
3/20/2000$7.98154
3/21/2000$7.98154
3/22/2000$7.98154
3/23/2000$7.98154
3/24/2000$7.98154
3/27/2000$7.98154
3/28/2000$7.98154
3/29/2000$7.98154
3/30/2000$7.98154
3/31/2000$7.98154
4/3/2000$7.98154
4/4/2000$7.98154
4/5/2000$7.98154
4/6/2000$7.98154
4/7/2000$7.98154
4/10/2000$7.98154
4/11/2000$7.98154
4/12/2000$7.98154
4/13/2000$7.98154
4/14/2000$7.98154
4/17/2000$7.98154
4/18/2000$7.98154
4/19/2000$7.98154
4/20/2000$7.98154
4/24/2000$7.98154
4/25/2000$7.98154
4/26/2000$7.98154
4/27/2000$7.98154
4/28/2000$7.98154
5/1/2000$7.98154
5/2/2000$7.98154
5/3/2000$7.98154
5/4/2000$7.98154
5/5/2000$7.98154
5/8/2000$7.98154
5/9/2000$7.98154
5/10/2000$7.98154
5/11/2000$7.98154
5/12/2000$7.98154
5/15/2000$7.98154
5/16/2000$7.98154
5/17/2000$7.98154
5/18/2000$7.98154
5/19/2000$7.98154
5/22/2000$7.9271
5/23/2000$7.11915
5/24/2000$7.80241
5/25/2000$7.95987
5/26/2000$7.96104
5/30/2000$7.98154
5/31/2000$7.98154
6/1/2000$7.98154
6/2/2000$7.98154
6/5/2000$7.98154
6/6/2000$7.98154
6/7/2000$7.98154
6/8/2000$7.98154
6/9/2000$7.98154
6/12/2000$7.98154
6/13/2000$7.98154
6/14/2000$7.98154
6/15/2000$7.98154
6/16/2000$7.98154
6/19/2000$7.98154
6/20/2000$7.98154
6/21/2000$7.98154
6/22/2000$7.98154
6/23/2000$7.98154
6/26/2000$7.98154
6/27/2000$7.98154
6/28/2000$7.98154
6/29/2000$7.98154
6/30/2000$7.98154
7/3/2000$7.98154
7/5/2000$7.98154
7/6/2000$7.98154
7/7/2000$7.98154
7/10/2000$7.98154
7/11/2000$7.98154
7/12/2000$7.98154
7/13/2000$7.98154
7/14/2000$7.98154
7/17/2000$7.98154
7/18/2000$7.98154
7/19/2000$7.98154
7/20/2000$7.98154
7/21/2000$7.98154
7/24/2000$7.98154
7/25/2000$7.98154
7/26/2000$7.98154
7/27/2000$7.98154
7/28/2000$7.98154
7/31/2000$7.98154
8/1/2000$7.98154
8/2/2000$7.98154
8/3/2000$7.98154
8/4/2000$7.98154
8/7/2000$7.98154
8/8/2000$7.98154
8/9/2000$7.98154
8/10/2000$7.98154
8/11/2000$7.98154
8/14/2000$7.98154
8/15/2000$7.98154
8/16/2000$7.98154
8/17/2000$7.98154
8/18/2000$7.98154
8/21/2000$7.98154
8/22/2000$7.98154
8/23/2000$7.98154
8/24/2000$7.98154
8/25/2000$7.98154
8/28/2000$7.98154
8/29/2000$7.98154
8/30/2000$7.98154
8/31/2000$7.98154
9/1/2000$7.98154
9/5/2000$7.98154
9/6/2000$7.98154
9/7/2000$7.98154
9/8/2000$7.98154
9/11/2000$7.98154
9/12/2000$7.98154
9/13/2000$7.98154
9/14/2000$7.97789
9/15/2000$7.34729
9/18/2000$6.63686
9/19/2000$6.95236
9/20/2000$5.04454
9/21/2000$4.78537
9/22/2000$5.53705
9/25/2000$5.24451
9/26/2000$3.26117
9/27/2000$2.13197
9/28/2000$3.41918
9/29/2000$3.78717
10/2/2000$3.36735
10/3/2000$4.20188
10/4/2000$5.25728
10/5/2000$5.8542
10/6/2000$5.82509
10/9/2000$6.74417
10/10/2000$5.84035
10/11/2000$6.07701
10/12/2000$6.13672
10/13/2000$7.20473
10/16/2000$6.10494
10/17/2000$5.49405
10/18/2000$5.29027
10/19/2000$5.07075
10/20/2000$4.82997
10/23/2000$4.81451
10/24/2000$5.04387
10/25/2000$5.24847
10/26/2000$3.04761
10/27/2000$2.23904
10/30/2000$2.99111
10/31/2000$3.43396
11/1/2000$5.30641
11/2/2000$6.71599
11/3/2000$7.14767
11/6/2000$7.16589
11/7/2000$6.84749
11/8/2000$6.70058
11/9/2000$6.99783
11/10/2000$6.47944
11/13/2000$6.22946
11/14/2000$6.5056
11/15/2000$6.20549
11/16/2000$5.89954
11/17/2000$5.04193
11/20/2000$5.51006
11/21/2000$3.67361
11/22/2000$0.82991
11/24/2000$1.75593
11/27/2000$0.66664
11/28/2000$0.42563
11/29/2000$0
11/30/2000$0
12/1/2000$0.0813
12/4/2000$0
12/5/2000$0
12/6/2000$0

* Data shown are adjusted forward for all stock splits between the IPO and 12/6/00.

** Purchases on a date not listed in the chart above have no artificial inflation.

*** Purchases in the IPO itself at $13.00 per share have no artificial inflation.