Aspect Medical Systems, Inc.

DateInflation Amount Per Share*
1/28/2000**$14.5301***
1/31/2000$14.2817
2/1/2000$14.5301
2/2/2000$14.5301
2/3/2000$14.5301
2/4/2000$14.5301
2/7/2000$14.5301
2/8/2000$14.5301
2/9/2000$14.5301
2/10/2000$14.5301
2/11/2000$14.5301
2/14/2000$14.5301
2/15/2000$14.5301
2/16/2000$14.5301
2/17/2000$14.5301
2/18/2000$14.5301
2/22/2000$14.5301
2/23/2000$14.5301
2/24/2000$14.5301
2/25/2000$14.5301
2/28/2000$14.5301
2/29/2000$14.5301
3/1/2000$14.5301
3/2/2000$14.5301
3/3/2000$14.5301
3/6/2000$14.5301
3/7/2000$14.5301
3/8/2000$14.5301
3/9/2000$14.5301
3/10/2000$14.5301
3/13/2000$14.5301
3/14/2000$14.5301
3/15/2000$14.5301
3/16/2000$14.5301
3/17/2000$14.5301
3/20/2000$14.5301
3/21/2000$14.5301
3/22/2000$14.5301
3/23/2000$14.5301
3/24/2000$14.5301
3/27/2000$14.5301
3/28/2000$14.5301
3/29/2000$14.5301
3/30/2000$14.5301
3/31/2000$14.5301
4/3/2000$14.5301
4/4/2000$14.5301
4/5/2000$14.5301
4/6/2000$14.5301
4/7/2000$14.5301
4/10/2000$14.5301
4/11/2000$14.5301
4/12/2000$14.5301
4/13/2000$14.5301
4/14/2000$14.5301
4/17/2000$14.5301
4/18/2000$14.5301
4/19/2000$14.5301
4/20/2000$14.5301
4/24/2000$14.5301
4/25/2000$14.5301
4/26/2000$14.5301
4/27/2000$14.5301
4/28/2000$14.5301
5/1/2000$14.5301
5/2/2000$14.5301
5/3/2000$14.5301
5/4/2000$14.5301
5/5/2000$14.5301
5/8/2000$14.5301
5/9/2000$14.5301
5/10/2000$14.5301
5/11/2000$14.5301
5/12/2000$14.5301
5/15/2000$14.5301
5/16/2000$14.5301
5/17/2000$14.5301
5/18/2000$14.5301
5/19/2000$14.5301
5/22/2000$14.5301
5/23/2000$14.5301
5/24/2000$14.5301
5/25/2000$14.5301
5/26/2000$14.5301
5/30/2000$14.5301
5/31/2000$14.4491
6/1/2000$14.4911
6/2/2000$13.344
6/5/2000$11.9211
6/6/2000$11.5631
6/7/2000$9.6515
6/8/2000$11.7264
6/9/2000$14.4952
6/12/2000$13.7455
6/13/2000$13.624
6/14/2000$13.6571
6/15/2000$14.5126
6/16/2000$14.5301
6/19/2000$14.5301
6/20/2000$14.5301
6/21/2000$14.5301
6/22/2000$14.5301
6/23/2000$14.5301
6/26/2000$14.5301
6/27/2000$11.9321
6/28/2000$12.71
6/29/2000$14.3578
6/30/2000$13.2551
7/3/2000$13.2423
7/5/2000$13.9669
7/6/2000$12.088
7/7/2000$12.6549
7/10/2000$13.3793
7/11/2000$10.8092
7/12/2000$11.2375
7/13/2000$11.4297
7/14/2000$10.8616
7/17/2000$11.8692
7/18/2000$12.0401
7/19/2000$8.1666
7/20/2000$8.0626
7/21/2000$7.407
7/24/2000$8.4188
7/25/2000$7.1051
7/26/2000$7.2683
7/27/2000$6.4202
7/28/2000$7.9761
7/31/2000$10.1499
8/1/2000$9.1473
8/2/2000$8.5649
8/3/2000$8.2007
8/4/2000$7.9122
8/7/2000$8.6738
8/8/2000$8.8973
8/9/2000$8.5027
8/10/2000$8.2358
8/11/2000$8.7393
8/14/2000$8.1847
8/15/2000$8.2771
8/16/2000$7.1241
8/17/2000$6.6435
8/18/2000$6.3891
8/21/2000$6.1661
8/22/2000$5.8436
8/23/2000$4.8528
8/24/2000$4.1573
8/25/2000$4.4792
8/28/2000$4.3159
8/29/2000$4.9691
8/30/2000$6.1974
8/31/2000$6.5202
9/1/2000$8.2287
9/5/2000$7.3608
9/6/2000$6.3386
9/7/2000$4.9463
9/8/2000$5.672
9/11/2000$5.5597
9/12/2000$6.6552
9/13/2000$6.1313
9/14/2000$5.8812
9/15/2000$5.2742
9/18/2000$5.5711
9/19/2000$3.8312
9/20/2000$2.6244
9/21/2000$3.4695
9/22/2000$2.5014
9/25/2000$0.1601
9/26/2000$0.05
9/27/2000$0.0644
9/28/2000$1.2833
9/29/2000$1.4944
10/2/2000$0.5709
10/3/2000$0.8246
10/4/2000$0.0361
10/5/2000$0
10/6/2000$0
10/9/2000$0
10/10/2000$0
10/11/2000$0
10/12/2000$0
10/13/2000$0
10/16/2000$0
10/17/2000$0
10/18/2000$0
10/19/2000$0
10/20/2000$0
10/23/2000$0
10/24/2000$0
10/25/2000$0
10/26/2000$0
10/27/2000$0
10/30/2000$0
10/31/2000$0
11/1/2000$0
11/2/2000$0
11/3/2000$0
11/6/2000$0
11/7/2000$0.0158
11/8/2000$0
11/9/2000$0
11/10/2000$0.6755
11/13/2000$0.1263
11/14/2000$0.2573
11/15/2000$0.1484
11/16/2000$0
11/17/2000$0
11/20/2000$0
11/21/2000$0
11/22/2000$0.0028
11/24/2000$0
11/27/2000$0
11/28/2000$0
11/29/2000$0
11/30/2000$0.3284
12/1/2000$0.1503
12/4/2000$0.0796
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 $15.00 per share have no artificial inflation.