| Harvard University |
5,540 |
| Genzyme Corporation |
3,027 |
| Massachusetts Institute of Technology |
3,009 |
| Biogen Idec Inc. |
1,924 |
| LESLEY UNIVERSITY |
785 |
| Millennium Pharmaceuticals, Inc. |
525 |
| Camp Dresser & McKee Inc. |
401 |
| Akamai Technologies, Inc. |
383 |
| Forrester Research, Inc. |
377 |
| Vertex Pharmaceuticals Incorporated |
341 |
| MIT Alumni Association |
302 |
| Harvard University Law School |
293 |
| Patni Computer Systems Ltd. |
259 |
| Abt Associates Inc |
241 |
| Cambridge Public Health Commission dba Cambridge Health Alliance |
206 |
| Monitor Group LLC |
198 |
| Alkermes, Inc. |
189 |
| Charles Stark Draper Laboratory, Inc. |
166 |
| Whitehead Institute for Biomedical Research |
155 |
| Pegasystems Inc. |
151 |
| BBN Technologies |
144 |
| Art Technology Group, Inc. |
135 |
| AMAG Pharmaceuticals, Inc. |
112 |
| Alnylam Pharmaceuticals, Inc. |
109 |
| Cambridge city |
105 |
| InterSystems Corporation |
100 |
| Endeca Technologies, Inc. |
95 |
| Dyax Corp. |
92 |
| Kling Stubbins |
89 |
| Buckingham, Browne & Nichols School |
82 |
| Zipcar, Inc. |
78 |
| CambridgeSoft Corp. |
72 |
| Weidlinger Associates, Inc. |
72 |
| EF |
69 |
| SH-E |
69 |
| ARIAD Pharmaceuticals, Inc. |
68 |
| Simon Kucher and Partners |
67 |
| Ironwood Pharmaceuticals, Inc |
66 |
| Interaction Associates, Inc. |
63 |
| Infinity Pharmaceuticals |
62 |
| Cambridge Systematics, Inc. |
60 |
| Astrophysics Center |
59 |
| Cambridge College |
55 |
| Cambridge Bancorp |
55 |
| Idenix Pharmaceuticals, Inc. |
55 |
| The Brattle Group, Inc. |
55 |
| TIAX LLC |
52 |
| NaviNet, Inc. |
51 |
| Mitsubishi Electric Research Laboratories |
51 |
| AVEO Pharmaceuticals, Inc. |
51 |
| ITA Software |
48 |
| Momenta Pharmaceuticals, Inc. |
48 |
| Technology Review |
48 |
| Feinstein Kean Healthcare |
47 |
| Symmes Maini |
47 |
| CombinatoRx, Incorporated |
46 |
| Biopure Corporation |
45 |
| Cambridge Savings Bank |
45 |
| Cambridge Public Schools |
45 |
| Cell Press |
42 |
| Brightcove |
41 |
| Massachusetts Biotechnology Council |
41 |
| Tofias pc |
41 |
| Tolerx, Inc. |
40 |
| S E A Consultants, Inc |
40 |
| Sirtris Pharmaceuticals Inc. |
38 |
| Pyramid Research |
38 |
| Cambridge Consultants Inc. |
38 |
| Metabolix, Inc. |
37 |
| Management Sciences for Health, Inc. (MSH) |
37 |
| Union of Concerned Scientists |
36 |
| Acceleron Pharma, Inc |
36 |
| PG Calc Incorporated |
34 |
| JumpTap, Inc. |
34 |
| Proteus Design |
32 |
| General Catalyst Partners |
32 |
| Merrimack Pharmaceuticals, Inc. |
32 |
| Verenium Corporation |
32 |
| Molecular Insight Pharmaceuticals, Inc. |
31 |
| Vinfen Corporation |
31 |
| Acentech, Inc. |
30 |
| Outcome Sciences Inc |
30 |
| Etex Corp. |
30 |
| E Ink Corporation |
29 |
| Cambridgeside Galleria |
29 |
| Als Computers |
29 |
| Exeter Group |
28 |
| Frances Loeb Library |
28 |
| World Wide Web Consortium |
28 |
| Archemix Corp. |
27 |
| New England Pension Consultants |
27 |
| Basis Technology Corporation |
26 |
| Cambridge 7 Associates |
26 |
| MetaCarta, Inc. |
26 |
| Flagship Ventures |
26 |
| TERC |
26 |
| Clark Hunt & Embry |
26 |
| MedPanel Inc |
26 |
| ChoiceStream, Inc. |
26 |
| Fuld |
25 |
| Institute for Healthcare Improvement |
25 |
| Tsoi Kobus |
24 |
| Lowrie Lando |
24 |
| Innoveer Solutions, Inc. |
23 |
| Hubspot LLC |
23 |
| SmartRoute Systems, Inc. |
23 |
| Smartleaf |
23 |
| Peptimmune, Inc. |
22 |
| PJA Advertising & Marketing |
22 |
| Abcam Inc |
22 |
| Helicos BioSciences Corporation |
22 |
| Clarus Ventures |
22 |
| cMarket, Inc. |
21 |
| Adaptive Optics Associates |
21 |
| MAK Technologies Inc. |
21 |
| Permabit, Inc. |
21 |
| Idera Pharmaceuticals |
21 |
| GenStruct, Inc |
21 |
| Senior Whole Health |
21 |
| East Cambridge Savings Bank |
21 |
| EchoMail, Inc. |
21 |
| Charles River Analytics Inc |
20 |
| Radcliffe Institute-Advanced |
20 |
| ThingMagic |
19 |
| Javelin Pharmaceuticals, Inc. |
19 |
| Product Genesis Inc. |
19 |
| Attorneys |
19 |
| Curis, Inc. |
18 |
| Vanu |
18 |
| Management Ventures, Inc. |
18 |
| Atlantis Components |
18 |
| Curl Corporation |
17 |
| Cytel Inc. |
17 |
| CellExchange, Inc. |
17 |
| Allurent, Inc. |
17 |
| Ascent Technology Inc |
17 |
| Hmfh Architects Inc |
17 |
| Sermo, Inc |
17 |
| Daratech Inc |
17 |
| CoreStreet Ltd. |
16 |
| Northern Light |
16 |
| Gloucester Pharmaceuticals |
16 |
| Cogent Research |
16 |
| Gradient Corporation |
16 |
| Air, Inc. |
15 |
| Merganser Capital Management |
15 |
| Escher Group |
15 |
| Fusion Optix Inc |
15 |
| WebLayers, Inc. |
15 |
| Tagsys RFID |
15 |
| Stax Inc |
15 |
| Ensemble Discovery Corporation |
14 |
| Elixir Pharmaceuticals Inc |
14 |
| Hemedex |
14 |
| PowerSteering |
14 |
| CampusCareerCenter.com |
14 |
| Oasis Technology Partners |
14 |
| Mersana Therapeutics, Inc. (Main) |
14 |
| Basho Technologies, Inc. |
14 |
| Online Buddies |
14 |
| Javelin Pharmaceuticals Inc. |
14 |
| Gilbane Group, Inc. |
14 |
| Newscientist |
14 |
| New England Healthcare Institute |
13 |
| Lean Enterprise |
13 |
| Educators Publishing Service |
13 |
| TransMolecular, Inc. |
13 |
| Analysis Group Economics |
13 |
| Window Book, Inc. |
13 |
| GreenFuel Technologies Corporation |
13 |
| Physicians for Human Rights |
13 |
| Sedo LLC |
13 |
| Shady Hill School Corporation |
13 |
| Greentech Media, Inc. |
13 |
| CIDC |
13 |
| Agios Pharmaceuticals |
13 |
| OmniGuide Communications |
12 |
| Bluefin Robotics Corporation |
12 |
| Radius Health, Inc. |
12 |
| Modern Continental Companies, Inc. |
12 |
| Aetna Student Health |
12 |
| Toth Brand Imaging |
12 |
| Human Services Research Institute |
12 |
| Cambridge Environmental , Inc. |
12 |
| Hydra Biosciences |
12 |
| Publishers Communication Group, Inc. |
12 |
| Correlagen Diagnostics , Inc. |
12 |
| T2 Biosystems, Inc. |
12 |
| ToolsGroup |
11 |
| Wellogic |
11 |
| LiveData, Inc |
11 |
| Harvard Book Stores |
11 |
| Chan Krieger & Associates |
11 |
| Linguistic Systems, Inc. |
11 |
| Prometrika, LLC |
11 |
| Ambient Devices, Inc. |
11 |
| Kowal |
11 |
| Industrial Economics, Incorporated. |
11 |
| Hyperion Catalysis International, Inc. |
11 |
| Aileron Therapeutics Inc. |
11 |
