EX-21 3 ex_446332.htm EXHIBIT 21

Exhibit 21.

List of Tidewater Inc. Subsidiaries as of December 31, 2022

| Name of Subsidiary or Organization | Jurisdiction of Incorporation | Percentage of Voting Securities Owned
1 | 3291361 Nova Scotia ULC | Canada | 100%
2 | Al Wasl Marine LLC | Dubai | 49%
3 | Anscor Tidewater Ship Management Corporation | Philippines | 24.99%
4 | Antilles Marine Service Limited | Trinidad and Tobago | 50%
5 | Arabia Shipping Limited | Cayman Islands | 100%
6 | Arrendadora de Naves del Golfo, S.A. de C.V., SOFOM, ENR | Mexico | 100%
7 | Bahtera Wira Sdn. Bhd. | Malaysia | 48.48%
8 | Compania Marítima de Magallanes Limitada | Chile | 100%
9 | Divetide Limited | Thailand | 49%
10 | Dromond Shipping Pte. Ltd. | Singapore | 100%
11 | DTDW Holdings Limited | Cyprus | 40%
12 | DTDW Marine Services B.V. | Netherlands | 40%
13 | Equipo Mara, C.A. | Venezuela | 19.90%
14 | Gallivat Corporation | Panama | 100%
15 | Gentry Investment Limited | Liberia | 100%
16 | Global Panama Marine Service, Inc. | Panama | 100%
17 | GM Offshore, Inc. | Delaware | 100%
18 | GOMI Holdings, Inc. | Delaware | 100%
19 | Gorgon NewCo, LLC | Delaware | 100%
20 | Gulf Channel Offshore Servicos LDA | Angola | 49%
21 | Gulf Fleet Abu Dhabi | Abu Dhabi | 49%
22 | Gulf Fleet Middle East Limited | Cayman Islands | 100%
23 | Gulf Fleet Supply Vessels, L.L.C. | Louisiana | 100%
24 | Gulf Offshore Marine International, S. de R.L. | Panama | 100%
25 | GulfMark Americas, Inc. | Delaware | 100%
26 | GulfMark Asia Pte. Ltd. | Singapore | 100%
27 | GulfMark Capital, LLC | Delaware | 100%
28 | GulfMark de Mexico, S. de R.L. de C.V. | Mexico | 100%
29 | GulfMark Foreign Investments LLC | Delaware | 100%
30 | GulfMark Malaysia Sdn. Bhd. | Malaysia | 49%
31 | GulfMark Malaysia, Inc. | Malaysia | 100%
32 | GulfMark Malta Limited | Malta | 100%
33 | GulfMark Management, Inc. | Delaware | 100%
34 | GulfMark Marine Trinidad Limited | Trinidad and Tobago | 49%
35 | GulfMark Maritime S. de R.L. de C.V. | Mexico | 100%
36 | GulfMark North Sea Limited | United Kingdom | 100%
37 | GulfMark Oceans, L.P. | Cayman Islands | 100%
38 | GulfMark Resources, LLC | Delaware | 100%
39 | GulfMark Servicios de Mexico, S. de R.L. de C.V. | Mexico | 49%
40 | GulfMark Servicos Maritimos do Brasil Limitada | Brazil | 100%
41 | GulfMark Shipping, LLC | Delaware | 100%
42 | GulfMark Thailand, LLC | Delaware | 100%
43 | GulfMark UK International Limited | United Kingdom | 100%
44 | Hilliard Oil & Gas, Inc. | Nevada | 100%
45 | Indigo Fleet Limited | Cayman Islands | 100%
46 | International Maritime Services, Inc. | Cayman Islands | 100%
47 | Java Boat Corporation | Louisiana | 100%
48 | Java Boat Corporation B.V. | Netherlands | 100%
49 | JB Holding Company B.V. | Netherlands | 100%
50 | Logistica Mexicana del Caribe, S. de R.L. de C.V. | Mexico | 100%
51 | Maré Alta do Brasil Navegacão Ltda. | Brazil | 100%
52 | Mashhor Marine Sdn. Bhd. | Brunei | 70%

Exhibit 21.

List of Tidewater Inc. Subsidiaries as of December 31, 2022

| Name of Subsidiary or Organization | Jurisdiction of Incorporation | Percentage of Voting Securities Owned
53 | Middle East Ships Limited | Cayman Islands | 100%
54 | Navegadores Servicos de Apoio Maritimo Ltda. | Brazil | 100%
55 | Naviera Tidex, S. de R.L. de C.V. | Mexico | 49%
56 | O.I.L. (Nigeria) Limited | Nigeria | 82.10%
57 | Offshore Labuan Leasing Inc. | Labuan | 100%
58 | Offshore Marine Inc. | Labuan | 49%
59 | Orange Rederiet ApS | Denmark | 100%
60 | Pacific Tidewater Pty. Ltd. | Australia | 100%
61 | Pan Marine do Brasil Ltda. | Brazil | 100%
62 | Pan Marine International, Inc. | Cayman Islands | 100%
63 | Pental Insurance Co. Ltd. | Bermuda | 100%
64 | Point Marine, L.L.C. | Louisiana | 100%
65 | PT Tidewater Marine Offshore | Indonesia | 100%
66 | Purple Fleet Limited | Cayman Islands | 100%
67 | Quality Shipyards, L.L.C. | Louisiana | 100%
68 | S.O.P., Inc. | Louisiana | 100%
69 | Samudra Viper Sdn. Bhd. | Malaysia | 49.48%
70 | Samudra Vixen Sdn. Bhd. | Malaysia | 49.48%
71 | SEA Maritime Services Pte. Ltd. | Singapore | 100%
72 | Semaring Enterprise Sdn. Bhd. | Malaysia | 51%
73 | Semaring Logistics (M) Sdn. Bhd. | Malaysia | 49%
74 | Serrata Investments, Inc. | Philippines | 40%
75 | Servicios Costa Afuera de Mexico, S. de R.L. de C.V. | Mexico | 100%
76 | Sonatide Marine Services, Ltd. | Cayman Islands | 100%
77 | Sonatide Marine, Ltd. | Cayman Islands | 100%
78 | Southern Ocean Services Pte. Ltd. | Singapore | 100%
79 | Tidewater Offshore Arabia Company Limited | Saudi Arabia | 49%
80 | Tidewater Pacific Offshore (Dubai) (L.L.C.) | Dubai | 100%
81 | TDW International Unrestricted, Inc. | Cayman Islands | 100%
82 | Tide States Vessels, L.L.C. | Louisiana | 100%
83 | Tide States, L.L.C. | Louisiana | 100%
84 | Tideflo Marine Services Limited | Nigeria | 40%
85 | Tidewater (India) Private Limited | India | 100%
86 | Tidewater Adonai Services Limited | Ghana | 49%
87 | Tidewater Al Rushaid Co. Ltd. | Saudi Arabia | 50%
88 | Tidewater Bahagia (B) Sdn. Bhd. | Brunei | 100%
89 | Tidewater Caribe, C.A. | Venezuela | 100%
90 | Tidewater Corporate Services, L.L.C. | Delaware | 100%
91 | Tidewater Crewing Guernsey Ltd. | Guernsey | 100%
92 | Tidewater Crewing Limited | Cayman Islands | 100%
93 | Tidewater Cypriot Offshore Limited | Cyprus | 100%
94 | Tidewater Cyprus Limited | Cyprus | 100%
95 | Tidewater de Mexico, S. de R.L. de C.V. | Mexico | 49%
96 | Tidewater Dutch Holdings Cooperatief U.A. | Netherlands | 100%
97 | Tidewater Emergency Response Services PTE. LTD. | Singapore | 100%
98 | Tidewater GOM Limited | Cayman Islands | 100%
99 | Tidewater GOM, Inc. | Louisiana | 100%
100 | Tidewater Investment SRL | Barbados | 100%
101 | Tidewater Marine AS | Norway | 100%
102 | Tidewater Marine Australia Pty Ltd | Australia | 100%
103 | Tidewater Marine Charter Services Pte. Ltd. | Singapore | 100%

Exhibit 21.
List of Tidewater Inc. Subsidiaries as of December 31, 2022

| Name of Subsidiary or Organization | Jurisdiction of Incorporation | Percentage of Voting Securities Owned
104 | Tidewater Marine Fleet, L.L.C. | Louisiana | 100%
105 | Tidewater Marine Gabon S.A. | Gabon | 100%
106 | Tidewater Marine Hulls, L.L.C. | Louisiana | 100%
107 | Tidewater Marine International Pte. Ltd. | Singapore | 100%
108 | Tidewater Marine International, Inc. | Cayman Islands | 100%
109 | Tidewater Marine Sakhalin, L.L.C. | Louisiana | 100%
110 | Tidewater Marine Service (M) Sdn. Bhd. | Malaysia | 100%
111 | Tidewater Marine Services EG, S.A. | Equatorial Guinea | 65%
112 | Tidewater Marine Ships, L.L.C. | Louisiana | 100%
113 | Tidewater Marine UK Ltd. | United Kingdom | 100%
114 | Tidewater Marine Vessels, L.L.C. | Louisiana | 100%
115 | Tidewater Marine West Indies Limited | Bahamas | 100%
116 | Tidewater Marine Western, L.L.C. | Delaware | 100%
117 | Tidewater Marine, L.L.C. | Louisiana | 100%
118 | Tidewater Mexico Holding, L.L.C. | Delaware | 100%
119 | Tidewater Navegacao Offshore Ltda. | Brazil | 100%
120 | Tidewater Norge AS | Norway | 100%
121 | Tidewater Ocean Salvage PTE. LTD. | Singapore | 50%
122 | Tidewater Offshore (Caspian) LLC | Azerbaijan | 100%
123 | Tidewater Offshore (North Sea) Limited | England | 100%
124 | Tidewater Offshore Africa SA | Cameroon | 100%
125 | Tidewater Offshore Canada Limited | Canada | 100%
126 | Tidewater Offshore Holdings Limited | Bermuda | 100%
127 | Tidewater Offshore Limited | Bermuda | 100%
128 | Tidewater Offshore NZ Limited | New Zealand | 100%
129 | Tidewater Offshore Operations PTE. LTD. | Singapore | 100%
130 | Tidewater Offshore Pty Limited | Australia | 100%
131 | Tidewater Offshore Sdn Bhd | Malaysia | 49%
132 | Tidewater Offshore Services PTE. LTD. | Singapore | 100%
133 | Tidewater Personnel UK LTD | United Kingdom | 100%
134 | Tidewater Production Solutions PTE. LTD. | Singapore | 100%
135 | Tidewater Rederi AS | Norway | 100%
136 | Tidewater Salvage PTE. LTD. | Singapore | 100%
137 | Tidewater Seabed Shipping AS | Norway | 100%
138 | Tidewater Servicos Maritimos, Lda. | Angola | 49%
139 | Tidewater Ship Management (Australia) Pty. Ltd. | Australia | 100%
140 | Tidewater Ship Management Limited | Hong Kong | 100%
141 | Tidewater Subsea ROV, L.L.C. | Louisiana | 100%
142 | Tidewater Subsea, L.L.C. | Louisiana | 100%
143 | Tidewater Support Services Limited | England | 100%
144 | Tidewater Venture, Inc. | Delaware | 100%
145 | Tidex Nigeria Limited | Nigeria | 60%
146 | Troms Offshore Fleet Holding AS | Norway | 100%
147 | Troms Offshore Management AS | Norway | 100%
148 | Troms Offshore Supply AS | Norway | 100%
149 | Twenty Grand (Brazil), L.L.C. | Louisiana | 100%
150 | Twenty Grand Marine Service, L.L.C. | Louisiana | 100%
151 | Vesselogistics Limited | Cyprus | 100%
152 | VTG Ships Limited | Cayman Islands | 100%
153 | VTG Supply Boat Liberia Inc. | Liberia | 100%
154 | Zapata Gulf Marine, L.L.C. | Louisiana | 100%

NOTE: The Company has elected to exclude certain subsidiaries that do not constitute a “Significant Subsidiary” as set forth in Section 601(b)(21) of Regulation S-K.