Rank	Company	Market value 3/31/00 (millions)	Book value (millions)	Market value as a % of book value
1	EMC Corp.	$134,161.14	$4,951.79	2709.35
2	Gillette Co.	$40,137.19	$2,979.00	1347.34
3	FleetBoston Financial Corp.	$33,421.56	$14,616.00	228.66
4	CMGI Inc.	$31,701.55	$5,820.45	544.66
5	Sycamore Networks Inc.	$30,456.13	$307.18	9914.75
6	Analog Devices	$28,359.83	$1,746.35	1623.95
7	State Street Corp.	$15,460.28	$2,652.00	582.97
8	Akamai Technologies Inc.	$14,875.00	$281.45	5285.23
9	Teradyne Inc.	$13,966.16	$1,153.03	1211.26
10	Biogen Inc.	$10,482.30	$979.53	1070.14
11	Staples Inc.	$9,686.72	$1,828.81	529.67
12	Boston Scientific Corp.	$8,838.32	$1,724.00	512.66
13	Lycos Inc.	$7,721.25	$1,381.00	559.11
14	American Tower Corp.	$7,687.69	$2,145.08	358.39
15	TJX Cos.	$6,879.92	$1,119.20	614.72
16	Raytheon Co.	$6,012.99	$10,959.00	54.87
17	Waters Corp.	$5,930.17	$292.16	2029.76
18	Millennium Pharmactcls Inc.	$5,798.92	$439.41	1319.72
19	Parametric Technology Corp.	$5,791.41	$599.05	966.76
20	Sepracor Inc.	$4,913.53	-$155.71	-3155.67
21	Sapient Corp.	$4,820.63	$304.96	1580.75
22	Art Technology Group Inc.	$4,305.95	$146.39	2941.52
23	Genzyme General	$4,222.83	$1,007.61	419.09
24	Engage Technologies Inc.	$4,126.75	$270.48	1525.73
25	Navisite Inc.	$3,420.32	$81.71	4185.93
26	New England Electric System	$3,203.40	$1,578.29	202.97
27	Thermo Electron Corp.	$3,188.22	$1,847.05	172.61
28	Viant Corp.	$3,086.76	$193.08	1598.70
29	PerkinElmer Inc.	$3,083.34	$550.78	559.82
30	Northeast Utilities	$2,953.97	$2,083.31	141.79
31	BJ's Wholesale Club Inc.	$2,822.21	$577.40	488.78
32	Allmerica Financial Corp.	$2,764.20	$2,240.20	123.39
33	Harcourt General Inc.	$2,672.24	$593.83	450.00
34	Nstar	$2,568.89	$1,523.53	168.61
35	Millipore Corp.	$2,550.64	$176.85	1442.25
36	Cognex Corp.	$2,454.14	$276.62	887.18
37	Alkermes Inc.	$2,360.97	$162.80	1450.23
38	Network Plus Corp.	$2,219.20	$89.28	2485.63
39	Kopin Corp.	$2,072.74	$130.07	1593.60
40	RSA Security Inc.	$2,060.74	$611.02	337.26
41	Cabot Corp.	$2,043.62	$705.00	289.88
42	Allaire Corp.	$2,027.96	$101.92	1989.68
43	LTX Corp.	$1,991.96	$160.58	1240.50
44	Netoptix Corp.	$1,960.87	$30.05	6525.58
45	Varian Semiconductor Equipment	$1,950.04	$200.68	971.72
46	Alpha Industries Inc.	$1,875.11	$214.40	874.58
47	Talbots Inc.	$1,853.92	$431.33	429.81
48	Keane Inc.	$1,794.04	$422.80	424.32
49	Dynatech Corp.	$1,762.33	-$300.33	-586.80
50	Cytyc Corp.	$1,743.76	$94.99	1835.71
51	Wave Systems Corp.	$1,658.45	$9.71	17083.28
52	Eastern Enterprises	$1,623.45	$754.63	215.13
53	Breakaway Solutions Inc.	$1,582.40	$68.34	2315.48
54	Eaton Vance Corp.	$1,525.40	$216.57	704.34
55	PRI Automation Inc.	$1,392.98	$107.86	1291.48
56	Northeast Optic Network Inc.	$1,386.32	$67.47	2054.81
57	Neiman-Marcus Group Inc.	$1,357.25	$817.35	166.06
58	Natural Microsystems Corp.	$1,351.42	$50.51	2675.39
59	Helix Technology Corp.	$1,343.24	$71.62	1875.43
60	Seachange International Inc.	$1,307.99	$34.34	3808.83
61	Silverstream Software Inc.	$1,306.85	$63.58	2055.31
62	Ibasis Inc.	$1,299.34	$126.90	1023.88
63	Houghton Mifflin Co.	$1,275.37	$433.02	294.53
64	Transkaryotic Therapies Inc.	$1,259.13	$195.78	643.13
65	Exchange Applications	$1,253.61	$70.71	1772.84
66	Digitas Inc.	$1,242.22	$119.84	1036.60
67	MKS Instruments Inc.	$1,241.09	$119.17	1041.45
68	Be Free Inc.	$1,230.50	$82.56	1490.42
69	Project Software & Development Inc.	$1,217.69	$122.84	991.27
70	Ardent Software Inc.	$1,215.20	$120.17	1011.27
71	Iron Mountain Inc.	$1,206.36	$488.75	246.82
72	Vertex Pharmaceuticals Inc.	$1,202.38	$209.23	574.66
73	Netegrity Inc.	$1,170.67	$106.43	1099.90
74	Open Market Inc.	$1,135.52	$49.96	2272.96
75	Affiliated Managers Group Inc.	$1,089.51	$477.99	227.94
76	Maker Communications Inc.	$1,063.87	$59.42	1790.42
77	Polaroid Corp.	$1,059.63	$370.50	286.00
78	Forrester Research Inc.	$1,052.88	$78.81	1336.06
79	Mercury Computer Systems Inc.	$1,025.25	$93.69	1094.31
80	Aspen Technology Inc.	$1,023.06	$145.35	703.86
81	Commerce Group Inc.	$1,013.62	$646.63	156.75
82	United Asset Mgmt Corp.	$989.81	$185.12	534.69
83	C-Bridge Internet Soltns Inc.	$986.27	$67.11	1469.59
84	CTC Communications Group Inc.	$973.70	-$14.59	-6673.78
85	Telaxis Communications Corp.	$972.09	-$34.42	-2824.12
86	Liberty Financial Cos.	$940.36	$1,185.90	79.30
87	ACT Manufacturing Inc.	$921.07	$178.13	517.08
88	Aware Inc.	$879.46	$52.97	1660.33
89	Yankee Candle Inc.	$861.77	$61.44	1402.73
90	Investors Financial Services Corp.	$860.16	$136.84	628.60
91	Cubist Pharmaceuticals Inc.	$859.40	$25.15	3416.69
92	MCK Communications Inc.	$855.48	$33.41	2560.32
93	Cambridge Technology Partner	$841.76	$277.04	303.84
94	Progress Software Corp.	$836.46	$142.31	587.77
95	Brooks Automation Inc.	$798.81	$145.06	550.70
96	Sipex Corp.	$768.68	$105.10	731.38
97	Vicor Corp.	$763.87	$244.53	312.38
98	PolyMedica Corp.	$760.52	$126.59	600.76
99	Thermo Optek Corp.	$759.07	$348.34	217.91
100	Biopure Corp.	$742.50	$43.47	1707.92
Company stock must trade on one of the three major exchanges and must have traded on March 31, 2000, at $1 or higher a share. Data compiled by COMPUSTAT.