Rule 8.3 - Hallin Marine Subsea International Plc

FORM 8.3 DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE (Rule 8.3 of the Takeover Code) 1.         KEY INFORMATION +---------------------------------------+--------------------------------------+ |Name of person dealing  (Note 1) |GLG PARTNERS LP | +---------------------------------------+--------------------------------------+ |Company dealt in |HALLIN MARINE SUBSEA INTERNATIONAL PLC| +---------------------------------------+--------------------------------------+ |Class of relevant security to which the|ORDINARY SHARES | |dealings being disclosed relate (Note | | |2)() | | +---------------------------------------+--------------------------------------+ |Date of dealing |22 DECEMBER 2009 | +---------------------------------------+--------------------------------------+ 2.         INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE (a)        Interests and short positions (following dealing) in the class of relevant security dealt in (Note 3) +-------------+------------------------------------------+--------------------------------------------+ |  | Long | Short | |  | | | +-------------+------------------------------------------+--------------------------------------------+ |  |Number                     |Number                                      | |  |                (%) |  (%) | +-------------+------------------------------------------+--------------------------------------------+ |(1) Relevant |  |  | |securities | | | |  | | | +-------------+------------------------------------------+--------------------------------------------+ |(2) |704,775                              1.70%|  | |Derivatives | | | |(other than | | | |options) | | | |  | | | +-------------+------------------------------------------+--------------------------------------------+ |(3) Options |  |  | |and | | | |agreements to| | | |purchase/sell| | | |  | | | +-------------+------------------------------------------+--------------------------------------------+ |Total |704,775                              1.70%|  | |  | | | +-------------+------------------------------------------+--------------------------------------------+ (b)        Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3) +-----------------+-------------------------------+----------------------------+ |Class of relevant| Long | Short | |security: | | | |   | | | +-----------------+-------------------------------+----------------------------+ |  |Number                       |Number                   | |  |              (%) |                      (%) | +-----------------+-------------------------------+----------------------------+ |(1) Relevant |  |  | |securities | | | |  | | | +-----------------+-------------------------------+----------------------------+ |(2) Derivatives |  |  | |(other than | | | |options) | | | |  | | | +-----------------+-------------------------------+----------------------------+ |(3) Options and |  |  | |agreements to | | | |purchase/sell | | | |  | | | +-----------------+-------------------------------+----------------------------+ |Total |  |  | |  | | | +-----------------+-------------------------------+----------------------------+ (c)        Rights to subscribe (Note 3) +-----------------------------+---------+ | Class of relevant security: | Details | | | | |   | | +-----------------------------+---------+ |   |   | +-----------------------------+---------+ 3.         DEALINGS (Note 4) (a)        Purchases and sales +---------------+----------------------+---------------------------+ | Purchase/sale | Number of securities | Price per unit (Note 5)() | |   | | | +---------------+----------------------+---------------------------+ |   |   |   | |   | | | +---------------+----------------------+---------------------------+ (b)        Derivatives transactions (other than options) +--------------+---------------------+----------------------+------------------+ |Product name, |Long/short (Note 6)()|Number of securities |Price per unit | |e.g. CFD | |(Note 7)() |(Note 5) | +--------------+---------------------+----------------------+------------------+ |CFD |LONG |50,000 |0.2823 GBP | |  | | | | +--------------+---------------------+----------------------+------------------+ (c)        Options transactions in respect of existing securities (i)         Writing, selling, purchasing or varying +---------+-------------+-----------+--------+----------+-------+--------------+ |Product |Writing, |Number of |Exercise|Type, e.g.|Expiry |Option money | |name, |selling,  |securities |price |American, |date |paid/received | |e.g. call|purchasing, |to which | |European | |per unit (Note| |option |varying etc. |the option | |etc. | |5) | |  | |relates | | | | | | | |(Note 7)() | | | | | +---------+-------------+-----------+--------+----------+-------+--------------+ |  |  |  |  |  |  |  | +---------+-------------+-----------+--------+----------+-------+--------------+ (ii)        Exercising +---------------------------+---------------------+----------------------------+ |Product name, e.g. call |Number of securities |Exercise price per unit | |option | |(Note 5) | | | |  | +---------------------------+---------------------+----------------------------+ |  |  |  | | | |  | +---------------------------+---------------------+----------------------------+ (d)        Other dealings (including new securities) (Note 4) ( ) +--------------------------------+-------+-------------------------------------+ |Nature of transaction (Note 8)()|Details|Price per unit (if applicable)( | |( ) | |)(Note 5) | +--------------------------------+-------+-------------------------------------+ |  |  |  | |  | | | +--------------------------------+-------+-------------------------------------+ 4.         OTHER INFORMATION Agreements, arrangements or understandings relating to options or derivatives +------------------------------------------------------------------------------+ |Full details of any agreement, arrangement or understanding between the person| |disclosing and any other person relating to the voting rights of any relevant | |securities under any option referred to on this form or relating to the voting| |rights or future acquisition or disposal of any relevant securities to which | |any derivative referred to on this form is referenced.  If none, this should | |be stated.  | +------------------------------------------------------------------------------+ |  | |  | |  | +------------------------------------------------------------------------------+ Is a Supplemental Form 8 attached? (Note 9)                                                 YES/NO +-------------------------------------------------------------+----------------+ |Date of disclosure |23 December 2009| +-------------------------------------------------------------+----------------+ |Contact name |Dan Johnson | +-------------------------------------------------------------+----------------+ |Telephone number |020 7016 7426 | +-------------------------------------------------------------+----------------+ |If a connected EFM, name of offeree/offeror with which |N/A | |connected | | +-------------------------------------------------------------+----------------+ |If a connected EFM, state nature of connection (Note 10)() |N/A | +-------------------------------------------------------------+----------------+ [HUG#1367253]