US Internetworking, Inc.

DateInflation Amount Per Share*
4/9/1999**$42.6388***
4/12/1999$41.0019
4/13/1999$42.6388
4/14/1999$42.6388
4/15/1999$37.2846
4/16/1999$38.2669
4/19/1999$31.2184
4/20/1999$27.7262
4/21/1999$34.4945
4/22/1999$31.5798
4/23/1999$31.7763
4/26/1999$35.4359
4/27/1999$38.1056
4/28/1999$37.4835
4/29/1999$36.8313
4/30/1999$39.5628
5/3/1999$35.8637
5/4/1999$32.1737
5/5/1999$34.2998
5/6/1999$32.0526
5/7/1999$30.4763
5/10/1999$27.0985
5/11/1999$31.0464
5/12/1999$29.8083
5/13/1999$27.0907
5/14/1999$27.4898
5/17/1999$27.2862
5/18/1999$30.2042
5/19/1999$31.2818
5/20/1999$32.5599
5/21/1999$33.1889
5/24/1999$27.0026
5/25/1999$20.3012
5/26/1999$20.1623
5/27/1999$20.4608
5/28/1999$23.2225
6/1/1999$22.3596
6/2/1999$20.904
6/3/1999$20.8938
6/4/1999$20.753
6/7/1999$20.5955
6/8/1999$20.9243
6/9/1999$24.1929
6/10/1999$24.0266
6/11/1999$22.7239
6/14/1999$23.2915
6/15/1999$25.1083
6/16/1999$25.2181
6/17/1999$24.1691
6/18/1999$27.7479
6/21/1999$31.0883
6/22/1999$28.0929
6/23/1999$29.9252
6/24/1999$30.1816
6/25/1999$28.2395
6/28/1999$29.5653
6/29/1999$32.7654
6/30/1999$34.7185
7/1/1999$33.2199
7/2/1999$33.5723
7/6/1999$34.0956
7/7/1999$31.9244
7/8/1999$29.4699
7/9/1999$26.8984
7/12/1999$27.4068
7/13/1999$27.1562
7/14/1999$27.6431
7/15/1999$27.1601
7/16/1999$27.4831
7/19/1999$26.8219
7/20/1999$26.7232
7/21/1999$26.6586
7/22/1999$23.5022
7/23/1999$23.7715
7/26/1999$26.1117
7/27/1999$28.0062
7/28/1999$29.5996
7/29/1999$22.1385
7/30/1999$20.9105
8/2/1999$19.309
8/3/1999$17.2414
8/4/1999$15.882
8/5/1999$16.6245
8/6/1999$14.652
8/9/1999$13.3751
8/10/1999$12.5896
8/11/1999$12.4413
8/12/1999$12.9049
8/13/1999$15.5646
8/16/1999$13.7848
8/17/1999$13.3834
8/18/1999$15.9974
8/19/1999$13.1331
8/20/1999$12.6783
8/23/1999$12.9071
8/24/1999$12.0688
8/25/1999$11.5732
8/26/1999$11.5394
8/27/1999$10.8713
8/30/1999$7.9136
8/31/1999$8.2096
9/1/1999$8.5684
9/2/1999$8.458
9/3/1999$9.1899
9/7/1999$11.126
9/8/1999$10.1463
9/9/1999$12.0462
9/10/1999$20.4626
9/13/1999$17.0247
9/14/1999$17.5092
9/15/1999$16.6773
9/16/1999$16.4184
9/17/1999$17.0399
9/20/1999$16.2328
9/21/1999$17.1688
9/22/1999$17.0981
9/23/1999$16.0549
9/24/1999$13.7296
9/27/1999$21.5422
9/28/1999$19.0952
9/29/1999$21.4974
9/30/1999$24.4751
10/1/1999$21.729
10/4/1999$21.762
10/5/1999$20.8562
10/6/1999$19.8202
10/7/1999$20.7625
10/8/1999$18.6704
10/11/1999$20.9821
10/12/1999$21.9813
10/13/1999$22.0282
10/14/1999$22.7057
10/15/1999$28.2308
10/18/1999$26.9369
10/19/1999$25.7442
10/20/1999$24.0067
10/21/1999$25.5575
10/22/1999$28.2792
10/25/1999$24.3493
10/26/1999$23.5315
10/27/1999$23.6912
10/28/1999$25.8785
10/29/1999$26.1861
11/1/1999$31.185
11/2/1999$35.4167
11/3/1999$38.0484
11/4/1999$37.5241
11/5/1999$37.3945
11/8/1999$37.229
11/9/1999$37.5016
11/10/1999$40.1299
11/11/1999$41.9154
11/12/1999$42.5026
11/15/1999$42.5218
11/16/1999$42.6388
11/17/1999$42.6388
11/18/1999$42.6388
11/19/1999$42.6388
11/22/1999$42.612
11/23/1999$39.427
11/24/1999$39.3199
11/26/1999$41.5157
11/29/1999$40.8955
11/30/1999$40.4091
12/1/1999$42.5882
12/2/1999$42.6388
12/3/1999$42.6388
12/6/1999$42.6388
12/7/1999$42.6388
12/8/1999$42.6388
12/9/1999$42.6388
12/10/1999$42.6388
12/13/1999$42.6388
12/14/1999$42.6388
12/15/1999$42.6388
12/16/1999$42.6388
12/17/1999$42.6388
12/20/1999$42.6388
12/21/1999$42.6388
12/22/1999$42.6388
12/23/1999$42.6388
12/27/1999$42.6388
12/28/1999$42.6388
12/29/1999$42.6388
12/30/1999$42.6388
12/31/1999$42.6388
1/3/2000$42.6388
1/4/2000$42.6388
1/5/2000$42.6388
1/6/2000$42.6388
1/7/2000$42.6388
1/10/2000$42.6388
1/11/2000$42.6388
1/12/2000$42.6388
1/13/2000$42.6388
1/14/2000$42.6388
1/18/2000$42.6388
1/19/2000$42.6388
1/20/2000$42.6388
1/21/2000$42.6388
1/24/2000$42.6388
1/25/2000$42.6388
1/26/2000$42.6388
1/27/2000$42.6388
1/28/2000$42.6388
1/31/2000$42.6388
2/1/2000$42.6388
2/2/2000$42.6388
2/3/2000$42.6388
2/4/2000$42.6388
2/7/2000$42.6388
2/8/2000$42.6388
2/9/2000$42.6388
2/10/2000$42.6388
2/11/2000$42.6388
2/14/2000$42.6388
2/15/2000$42.6388
2/16/2000$42.6388
2/17/2000$42.6388
2/18/2000$42.6388
2/22/2000$42.6388
2/23/2000$42.6388
2/24/2000$42.6388
2/25/2000$42.6388
2/28/2000$42.6388
2/29/2000$42.6388
3/1/2000$42.6388
3/2/2000$42.6388
3/3/2000$42.6388
3/6/2000$42.6388
3/7/2000$42.6388
3/8/2000$42.6388
3/9/2000$42.6388
3/10/2000$42.6388
3/13/2000$42.6388
3/14/2000$42.6388
3/15/2000$42.6388
3/16/2000$42.6388
3/17/2000$42.6388
3/20/2000$42.6388
3/21/2000$42.6388
3/22/2000$42.6388
3/23/2000$42.6388
3/24/2000$42.6388
3/27/2000$42.6388
3/28/2000$42.6388
3/29/2000$42.6388
3/30/2000$42.6388
3/31/2000$42.6388
4/3/2000$42.6388
4/4/2000$42.6388
4/5/2000$42.6388
4/6/2000$42.6388
4/7/2000$42.6388
4/10/2000$42.6388
4/11/2000$42.6388
4/12/2000$42.6388
4/13/2000$42.6388
4/14/2000$39.141
4/17/2000$35.553
4/18/2000$40.1526
4/19/2000$40.8794
4/20/2000$36.4019
4/24/2000$35.0843
4/25/2000$35.9295
4/26/2000$33.6854
4/27/2000$35.7864
4/28/2000$40.0298
5/1/2000$37.8497
5/2/2000$36.3435
5/3/2000$35.4683
5/4/2000$39.2029
5/5/2000$37.8242
5/8/2000$37.7806
5/9/2000$36.1855
5/10/2000$35.4519
5/11/2000$37.3969
5/12/2000$34.6622
5/15/2000$36.3983
5/16/2000$39.4938
5/17/2000$40.9825
5/18/2000$37.3071
5/19/2000$35.5741
5/22/2000$33.8527
5/23/2000$27.6384
5/24/2000$31.5565
5/25/2000$27.4759
5/26/2000$27.3481
5/30/2000$32.2223
5/31/2000$31.4034
6/1/2000$34.3738
6/2/2000$37.9263
6/5/2000$38.475
6/6/2000$36.1094
6/7/2000$35.65
6/8/2000$35.3049
6/9/2000$35.9081
6/12/2000$32.9642
6/13/2000$33.2859
6/14/2000$31.8536
6/15/2000$34.8804
6/16/2000$34.013
6/19/2000$29.6784
6/20/2000$29.2194
6/21/2000$31.4969
6/22/2000$32.371
6/23/2000$31.4776
6/26/2000$32.7025
6/27/2000$30.6655
6/28/2000$32.703
6/29/2000$34.1019
6/30/2000$34.9691
7/3/2000$34.1039
7/5/2000$31.2511
7/6/2000$30.7536
7/7/2000$30.5509
7/10/2000$28.5568
7/11/2000$24.9446
7/12/2000$28.8676
7/13/2000$30.5322
7/14/2000$32.0245
7/17/2000$36.276
7/18/2000$34.2254
7/19/2000$33.3437
7/20/2000$35.4896
7/21/2000$33.2073
7/24/2000$32.5154
7/25/2000$31.531
7/26/2000$26.887
7/27/2000$28.5785
7/28/2000$28.3254
7/31/2000$26.1249
8/1/2000$23.7593
8/2/2000$24.357
8/3/2000$20.7811
8/4/2000$21.8738
8/7/2000$23.2207
8/8/2000$22.4954
8/9/2000$20.2289
8/10/2000$18.5966
8/11/2000$19.5315
8/14/2000$16.5158
8/15/2000$17.6135
8/16/2000$15.9019
8/17/2000$15.1463
8/18/2000$14.8606
8/21/2000$16.3782
8/22/2000$15.3854
8/23/2000$13.8301
8/24/2000$12.311
8/25/2000$13.2153
8/28/2000$13.8341
8/29/2000$12.6799
8/30/2000$12.7145
8/31/2000$12.5129
9/1/2000$11.142
9/5/2000$11.8499
9/6/2000$11.7252
9/7/2000$9.8127
9/8/2000$9.6502
9/11/2000$8.4998
9/12/2000$8.3519
9/13/2000$7.013
9/14/2000$6.6798
9/15/2000$11.352
9/18/2000$9.5802
9/19/2000$8.0959
9/20/2000$6.4802
9/21/2000$6.032
9/22/2000$6.2167
9/25/2000$7.7534
9/26/2000$6.4425
9/27/2000$5.4123
9/28/2000$6.3665
9/29/2000$5.8747
10/2/2000$5.0349
10/3/2000$2.917
10/4/2000$2.5674
10/5/2000$1.4545
10/6/2000$0.8104
10/9/2000$1.3221
10/10/2000$0.975
10/11/2000$0.002
10/12/2000$0
10/13/2000$0.0945
10/16/2000$0.4409
10/17/2000$0.8002
10/18/2000$0.7812
10/19/2000$0.1937
10/20/2000$0.0924
10/23/2000$0.0923
10/24/2000$0.0958
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$0.0875
11/6/2000$0.3286
11/7/2000$0.0637
11/8/2000$0
11/9/2000$0
11/10/2000$0
11/13/2000$0.7056
11/14/2000$3.0683
11/15/2000$2.3917
11/16/2000$2.4502
11/17/2000$0.9528
11/20/2000$0.7537
11/21/2000$0
11/22/2000$0
11/24/2000$0.0302
11/27/2000$0
11/28/2000$0
11/29/2000$0
11/30/2000$0
12/1/2000$0
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 $21.00 per share have no artificial inflation.