EXHIBIT 21 Subsidiaries of the Registrant As of March 24, 1995, the following is a list of the parent (Registrant) and its subsidiaries, together with their subsidiaries. Except as noted, all voting securities of the listed subsidiaries are 100% beneficially owned by the Registrant or a subsidiary thereof. State or Country Number of Incorporation of Name of Company or Organization Parent - ------------------------------------------------------------------------------- 1 EG&G, Inc. Massachusetts N/A 2 EG&G Alabama, Inc. Alabama 1 3 EG&G Astrophysics Research Corporation California 1 4 EG&G (Australia) Pty. Ltd. Australia 21 5 EG&G Automotive Research, Inc. Texas 21 6 EG&G Birtcher, Inc. California 34 7 EG&G Benelux B.V. Netherlands 78 (77%) 1 (23%) 8 EG&G Canada Limited Canada 1 (10%) 29 (43.5%) 39 (46.5%) 9 EG&G Chandler Engineering Company Oklahoma 1 10 EG&G Defense Materials, Inc. Utah 1 11 EG&G do Brasil Ltda. Brazil 21 (95%) 90 (5%) 12 EG&G Dynatrend, Inc. Delaware 1 13 EG&G E.C. Bahrain 21 14 EG&G Energy Measurements, Inc. Nevada 1 15 EG&G Environmental, Inc. Delaware 1 16 EG&G Exporters Ltd. U.S. Virgin Islands 21 17 EG&G Florida, Inc. Florida 1 18 EG&G Flow Technology, Inc. Arizona 1 19 EG&G Gamma Scientific, Incorporated Delaware 21 20 EG&G GmbH Germany 21 21 EG&G Holdings, Inc. Massachusetts 1 (79%) 28 (8%) 23 ( 6%) 76 (5%) 9(2%) 22 EG&G Idaho, Inc. Idaho 21 23 EG&G Instruments, Inc. Delaware 21 24 EG&G Instruments GmbH Germany 1 25 EG&G International, Ltd. Cayman Islands 21 26 EG&G International Marine Services Ltd. Hong Kong 24 27 EG&G Japan, Inc. Delaware 21 28 EG&G Java Drive, Inc. California 1 29 EG&G Judson Infrared, Inc. Pennsylvania 1 30 EG&G KT Aerofab, Inc. California 21 31 EG&G Langley, Inc. Virginia 17 32 EG&G Ltd. United Kingdom 21 (80.9%) 3 (19.1%) 33 EG&G Management Systems, Inc. New Mexico 1 34 EG&G Metals, Inc. Massachusetts 1 35 EG&G Missouri Metal Shaping Company Missouri 21 36 EG&G Mound Applied Technologies, Inc. Ohio 1 37 EG&G Omni, Inc. Philippines 21 38 EG&G Power Systems, Inc. California 1 EG&G, Inc. Exhibit 21 Page 2 State or Country Number of Incorporation of Name of Company or Organization Parent - ------------------------------------------------------------------------------- 39 EG&G Pressure Science Incorporated Maryland 21 40 EG&G Rocky Flats, Inc. Colorado 1 41 EG&G Sealol Eagle, Inc. Delaware 43 (51%) 42 EG&G Sealol Ltd. (Sealol Egypt) Egypt 21 (22%) 25 (78%) 43 EG&G Sealol, Inc. Delaware 21 44 EG&G Services, Inc. Delaware 1 45 EG&G Special Projects, Inc. Nevada 1 46 EG&G Star City, Inc. Ohio 2 47 EG&G Structural Kinematics, Inc. Michigan 1 48 EG&G S.A. France 1 (89.6%) 43 (10.4%) 49 EG&G Technical Services of West Virginia, Inc. West Virginia 51 50 EG&G Ventures, Inc. Massachusetts 1 51 EG&G Washington Analytical Services Center, Inc. District of Columbia 1 52 EG&G, SpA Italy 21 53 Antarctic Support Associates (Partnership) Colorado 1 (40%) 54 Asmuss-Sealol (NZ) Limited New Zealand 21 (25%) 55 Benelux Analytical Instruments S.A. Belgium 1 (92.3%) 56 Berthold Analytical Instruments, Inc. Delaware 1 57 Berthold A.G. Switzerland 59 58 Berthold France S.A. France 48 59 Berthold GmbH Germany 1 60 Berthold Munchen GmbH Germany 71 (60%) 61 Berthold Systems, Inc. Pennsylvania 1 (30%) 62 Biozone Oy Finland 88 63 B.A.I. GmbH Austria 59 64 B.A.I. S.A.R.L. France 48 65 Dilor SA France 48 (20%) 66 Eagle EG&G Aerospace Co. Ltd. Japan 1 (49%) 67 EC III, Inc. New Mexico 1 (50%) 68 Heimann Optoelectronics GmbH Germany 71 69 Heimann Shenzhen Optoelectronics Co. Ltd. China 68 (60%) 70 IC Sensors, Inc. California 1 71 Laboratorium Prof. Dr. Rudolf Berthold GmbH & Co. KG Germany 20 (58.0%) 24 (2.3%) 5(39.7%) 72 NOK EG&G Optoelectronics Corporation Japan 1 (49%) 73 NoVOCs, Inc. California 1 74 Pribori Oy Finland 88 75 PT EG&G Heimann Optoelectronics Indonesia 21 76 Reticon Corporation California 1 77 Reynolds Electrical & Engineering Co., Inc. Texas 1 78 Rotron Incorporated New York 1 79 Science Support Corporation Delaware 1 80 Sealol Hindustan Limited India 43 (20%) 81 Sealol S.A. Venezuela 43 82 Seiko EG&G Co. Ltd. Japan 1 (49%) 83 Shanghai EG&G Reticon Optoelectronics Co. Ltd. China 76 (50%) EG&G, Inc. Exhibit 21 Page 3 State or Country Number of Incorporation of Name of Company or Organization Parent - ------------------------------------------------------------------------------- 84 Societe Civile Immobiliere France 1 (82.5%) 58 (17.5%) 85 Vactec, Inc. Missouri 1 86 WALLAC A/S Denmark 88 87 WALLAC Norge AS Norway 88 88 WALLAC Oy Finland 21 89 WALLAC Sverige AB Sweden 88 90 WALLAC, Inc. Maryland 1 91 Wellesley B.V. Netherlands 93 92 Westpart, Inc. Nevada 43 93 Wickford N.V. Netherlands Antillies 25 94 Wright Components, Inc. New York 1