This presentation should be read in conjunction with STX OSV Holdings Limited’s results for the period ended 31 December 2012 in the SGXNet announcement. Financial figures are presented according to SFRS.

This presentation may contain forward-looking statements that involve risks and uncertainties. Such forward-looking statements and financial information involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements and financial information. Such forward-looking statements and financial information are based on numerous assumptions regarding our present and future business strategies and the environment in which we will operate in the future. As these statements and financial information reflect our current views concerning future events, these statements and financial information necessarily involve risks, uncertainties and assumptions. Actual future performance could differ materially from these forward-looking statements and financial information. You are cautioned not to place undue reliance on these forward looking statements, which are based on the Company’s current view of future events.

Disclaimer

26.02.2013 | Page 2

4Q and FY 2012 Results PresentationSTX OSV Holdings Limited

26 February 2013

Revenue of NOK 11 129 million for FY 2012, down 10% from NOK 12 401 million in FY 2011

EBITDA of NOK 1 473 million for FY 2012, down 37% from exceptional NOK 2 355 million in FY 2011

EBITDA margin, representing EBITDA to total operating revenues, of 13.2% forFY 2012, down from exceptional 19.0% in FY 2011

Order intake of NOK 1 272 million in 4Q 2012. Order intake may vary significantly on a quarter-by-quarter basis

48 vessels in the order book as at 31 December 2012, of which 27 of own design

Lower-than-expected new order intake resulting in temporarily lower utilization at some yards

Brazil operations still affecting group performance. Various measures taken to secure delivery of the orderbook in Niterói

Robust subsea support and construction vessel market. Early signs of improvement in the segment for large and ultra-large anchor handlers (AHTS)

Key messages

26.02.2013 | Page 4

Business update4Q 2012

1 PSVFar Solitaire from Langsten (Norway) to Farstad Shipping

2 MRVs (Multi Role Vessels)Skandi Nova from Aukra (Norway) to DOFSkandi Marøy from Brattvaag (Norway) to DOF

Two new vessel contracts secured in 4Q 2012

2 OSCVs for Siem Offshore

Three new contracts secured since theend of the quarter

1 OSCV for Solstad Offshore1 OSCV for Farstad Shipping1 OSCV for DOF Subsea

Vessel deliveries and new contracts – 4Q 2012

Vessel deliveries New contracts

As of 31 December 2012, the Group had 48 vessels in the order book, 27 of which will be of STX OSV’s own design.

26.02.2013 | Page 6

Order book development

2007 2008 2009 2010 2011 2012

2007 2008 2009 2010 2011 2012

Order book at the end of the period (NOK million)1)

New order intake during the period (NOK million)1)

22 389

16 411

4 Vessels5 692 8 Vessels

4 458

17 031

27 Vessels12 555

16 675

28 Vessels11 117

1) Includes firm orders only. Includes variation orders and trading packages

28 Vessels15 461

27 363

15 096

16 Vessels9 501

9M 2012: NOK 8 229million4Q 2012: NOK 1 272 million

26.02.2013 | Page 7

Order book statusOrder book as of 31 Dec. 2012 (# of vessels)

24

14

8

23

22

2

0 10 20 30

2011

2012

2013

2014

2014-168 LPG carriers to be

delivered fromnew yard in Brazil

Del

iver

y ye

ar

Delivery year

Norway / Romania

Brazil Vietnam Total

2014-16

8 Other

8

2014

2 AHTS4 OSCV3 PSV3 Other

1 AHTS 1 PSV

14

2013

3 AHTS10 PSV3 OSCV4 Other

2 ATHS2 PSV 2 PSV 26

2012 15 PSV1 OSCV2 Other

1 AHTS1 PSV

1 AHTS1 PSV 22

delivered

2 carry-over from 2012 deliveredin weeks 1&2

delivered

26.02.2013 | Page 8

Order book by region and vessel typeBy Region

Order book30 Sep. 2012

Deliveries4Q 2012

Order intake4Q 2012

Order book31 Dec. 2012

Norway / Romania 33 3 2 32

Brazil 13 - - 13

Vietnam 3 - - 3

Total 49 3 2 48

By Vessel TypeOrder book

30 Sep. 2012Deliveries

4Q 2012Order intake

4Q 2012Order book

31 Dec. 2012

AHTS 8 - - 8

PSV (incl. MRV) 21 3 - 18

OSCV 5 - 2 7

Other 15 - - 15

Total 49 3 2 48

26.02.2013 | Page 9

NorwayThree vessels successfully delivered during the quarterTemporarily lower utilization levels at some yards

RomaniaInvestments in automation and process and efficiency improvements arebeing implemented with good results

VietnamExcellent project execution but too low activity levels in the fourth quarter

BrazilStill affecting group performance negativelyHigh attention to mitigating the effects of high workload and too high staff turnover, which still pose a risk to productivity and the delivery scheduleVarious measures taken to secure delivery of the order book in Niterói

Operations update

26.02.2013 | Page 10

Most major construction works in placeStart of shipbuilding activities scheduled for summer 2013, in line withprevious estimatesFocus of the project now shifting from shipyard construction towardsestablishing a shipbuilding organization

Status – Brazil new yard (STX OSV Promar)

26.02.2013 | Page 11

Financial highlights4Q 2012

Revenues and margins

9 2918 605

3 1102 524

0

2 000

4 000

6 000

8 000

10 000

12 000

FY 2011 FY 2012

12 40111 129

Revenues (NOK million) EBITDA (NOK million) and EBITDA Margin (%)

1 478

1 186

876

287

0200400600800

1 0001 2001 4001 6001 8002 0002 2002 400

FY 2011 FY 2012

19.0%

13.2%

26.02.2013 | Page 13

(NOK million)4Q ended 31 December

D(%) FY ended 31 December

D(%) 2012 2011 2012 2011

Revenue 2 524 3 110 (19%) 11 129 12 401 (10%)

Materials, subcontract cost and others (1 457) (1 457) 0% (7 154) (7 597) (6%)

Salaries and related costs (567) (608) (7%) (1 953) (1 899) 3%

EBITDA 287 876 (67%) 1 473 2 355 (37%)

EBITDA % 11.4% 28.2% n/m 13.2% 19.0% n/m

Operating profit 210 821 (74%) 1 305 2 207 (41%)

Net financial income / (cost) (18) 11 n/m 18 (4) n/m

Profit before tax 190 828 (77%) 1 323 2 213 (40%)

Profit for the period 111 640 (83%) 889 1 602 (45%)

Statement of income – major items

26.02.2013 | Page 14

3 0352 418

29

19

0

500

1 000

1 500

2 000

2 500

3 000

31 Dec 2011 31 Dec 2012

Restricted Cash Non-restricted Cash

Cash and cash equivalents, and construction loans

(1) Cash and cash equivalents less sum of short-term and long-term interest bearing liabilities, excluding construction financing

Construction Loans (NOK million)

2 379

3 351

0

500

1 000

1 500

2 000

2 500

3 000

3 500

31 Dec 2011 31 Dec 2012

Net Cash (NOK million)1

2 805

1 858

0

500

1 000

1 500

2 000

2 500

3 000

31 Dec 2011 31 Dec 2012

Cash and Cash Equivalents (NOK million)

2 437

3 064

26.02.2013 | Page 15

Major balance sheet items

(NOK million)As at

31 December 2012 31 December 2011

Non-current assets 2 410 1 788

Current assets 10 458 11 019

Total assets 12 868 12 807

Total equity 3 227 3 553

Loans and borrowings and construction loans 3 385 2 407

Trade and other payables and construction work in progress 4 319 4 871

Other current liabilities 1 150 1 536

Long-term loans and borrowings 545 231

Other non-current liabilities 242 209

Total liabilities 9 641 9 254

Total equity and liabilities 12 868 12 807

26.02.2013 | Page 16

Cash flow highlights

(NOK million)4Q ended 31 December FY ended 31 December

2012 2011 2012 2011

Cash flows from operating activities 153 1 203 993 1 210

Cash flows from investing activities (164) (101) (631) (220)

Cash flows from financing activities 108 (10) (956) (506)

Net change in cash and cash equivalents 97 1 092 (594) 484

Cash and cash equivalents excluding restricted cashat the beginning of the financial period 2 332 1 939 3 035 2 551

Effects of currency translation differences (11) 4 (23) 0

Cash and cash equivalents excluding restricted cash at the end of the financial period 2 418 3 035 2 418 3 035

Restricted cash at the end of financial period 19 29 19 29

Cash and cash equivalents at the end of the financial period 2 437 3 064 2 437 3 064

26.02.2013 | Page 17

Earnings per share

Note: Earnings per ordinary share for the financial period attributable to equity holders of the parent. SGD amounts are translated from NOK based on the exchange rates prevailing at the reporting dates.

4Q ended 31 December FY ended 31 December

2012 2011 2012 2011

Earnings for the period (NOK millions) 124 638 902 1 594

Earnings for the period (SGD millions) 27 138 198 346

Weighted average number of shares (millions) 1 180 1 180 1 180 1 180

Earnings per share (NOK) 0.11 0.54 0.76 1.35

Earnings per share (SGD cents) 2.31 11.72 16.78 29.30

Adj. weighted average number of shares (millions) 1 182 1 180 1 182 1 180

Diluted earnings per share (NOK) 0.10 0.54 0.76 1.35

Diluted earnings per share (SGD cents) 2.30 11.72 16.75 29.30

Exchange rates (SGD/NOK) 4.557 4.610 4.557 4.610

26.02.2013 | Page 18

Net asset value per share

Note: Net asset value at the end of the financial period, and at the end of the last financial year, attributable to equity holders of the parent.SGD amounts are translated from NOK based on the exchange rates prevailing at the reporting dates.

As at

31 December 2012 31 December 2011

Net asset value at the end of the period (NOK millions) 3 162 3 510

Net asset value at the end of the period (SGD millions) 694 761

Number of shares (millions) 1 180 1 180

Net asset value per ordinary share (NOK) 2.68 2.97

Net asset value per ordinary share (SGD) 0.59 0.65

Exchange rate (SGD/NOK) 4.557 4.610

26.02.2013 | Page 19

The Company has in September 2012 paid an interim dividend of SGD 13 cents per share attributable to FY 2012, representing a dividend payout ratio of approximately 77.5% of distributable profits for the financial year, calculated based on the unaudited results for the fourth quarter and full year ended31 December 2012

Dividend

26.02.2013 | Page 20

Outlook4Q 2012

Outlook

Market for subsea support and construction vessels continues to be robustAs demonstrated by three OSCV orders secured after the end of the quarter

High-end PSV market still slowEarly signs of improvement in the segment of large and ultra-largeanchor handlers (AHTS)Selected opportunities within the specialized vessels segment

Offshore shipbuilding market in general highly competitive due to lowactivity in other parts of the shipbuilding industryNew competitors attempting to enter the OSV segment

STX OSV well positioned to cater to the increasing demand for advancedand customized projectsOpportunities arising from investments in R&D and new technology

26.02.2013 | Page 22

26.02.2013 | Page 23

Q&AQ&A4Q 2012