SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13D*
(Rule 13d-101)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
RULE 13d-2(a)
Under the Securities Exchange Act of 1934
(Amendment No. )
MARINER ENERGY INC
(Name of Issuer)
Common stock
(Title of Class of Securities)
56845T305
(CUSIP Number)
Svein Tore Hansen
SKAGEN Funds (SKAGEN AS)
P.O. Box 160, N-4001 Stavanger
Norway
(47) 51 21 38 35
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
December 03, 2009
(Date of Event which Requires
Filing of This Statement)
If the filing person has previously filed a statement on Schedule 13G
to report the acquisition that is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the
following box. [ ]
NOTE: Schedules filed in paper format shall include a signed original
and five copies of the schedule, including all exhibits. See Rule 13d-7 for
other parties to whom copies are to be sent.
(Continued on following pages)
(Page 1 of 7 Pages)
The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.
The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).
CUSIP NO. 56845T305 SCHEDULE 13D PAGE 2 OF 7 PAGES
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
SKAGEN Funds, Mutual funds managed by SKAGEN AS,ORG.NO 867 762 732
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ]
(b) [ ]
3 SEC USE ONLY
4 SOURCE OF FUNDS*
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT
TO ITEM 2(d) or 2(e) [ ]
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Norway
7 SOLE VOTING POWER
-0-
NUMBER OF 8 SHARED VOTING POWER
SHARES
BENEFICIALLY -0-
OWNED BY
EACH 9 SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH -0-
10 SHARED DISPOSITIVE POWER
-0-
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH PERSON
December 03, 2009 5325379
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
CERTAIN SHARES*
[ ]
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
December 03, 2009 5,23 %
14 TYPE OF REPORTING PERSON*
IV (Investment company)
* SEE INSTRUCTIONS BEFORE FILLING OUT!
CUSIP NO. 56845T305 SCHEDULE 13D PAGE 3 OF 7 PAGES
Item 1. Security and Issuer.
This statement on Schedule 13D relates to the shares ("Shares")
of Mariner Energy INC (the "Issuer").
The principal executive office of the Issuer is located at
Mariner Energy Inc., One Briar Lake Plaza, Suite 2000,
2000 West Sam Houston Parkway South Houston,USA.
Item 2. Identity and Background.
(a) This statement is filed by SKAGEN Funds (SKAGEN AS), a Norwegian
Investment company (the "Reporting Person").The Investment company has
eleven mutual funds under management. The shares are held for investment
purposes. The Investment Director is Kristian Falnes.
(b) The principal business address of the Reporting Person and
the Investment Director is P.O. Box 160, N-4001 Stavanger, Norway.
(c) The principal business of the Reporting Person and the
Investment Director is investing assets for unit holders investing in the
mutual funds under their management.
(d) Neither the Reporting Person nor the Investment Director
has,during the last five years, been convicted in a criminal proceeding
(excluding trafficviolations or similar misdemeanors).
(e) Neither the Reporting Person nor the Investment Director has,
during the last five years, been a party to a civil proceeding of a
judicial or administrative body of competent jurisdiction and as a result
of such proceeding was or is subject to a judgment, decree or final order
enjoining future violations of, or prohibiting or mandating activities
subject to, federal or state securities laws or finding any violation
with respect to such laws.
(f) The Reporting Person is a limited liability investment
company organized in Norway. The Investment Director and the rest of the
Principals are citizens of Norway.
CUSIP NO. 56845T305 SCHEDULE 13D PAGE 4 OF 7 PAGES
Item 3. Source and Amount of Funds or Other Consideration.
The Shares beneficially owned by the Reporting Person were acquired
with investment funds in the mutual funds under management.
Item 4 Purpose of Transaction.
The Reporting Person acquired the Shares for investment in the
ordinary course of business.
Except as set forth herein, neither the Reporting Person nor the
Investment Director have any present plan or proposal that would relate to
or result in any of the matters set forth in subparagraphs (a) - (j) of
Item 4 of Schedule 13D. The Reporting Person intends to review its investment
in the Issuer on a continuing basis. Depending on various factors including,
without limitation,the Issuer's financial position and strategic direction,
price levels of the Shares, conditions in the securities market and general
economic and industry conditions, the Reporting Person may in the future take
such actions with respect to its investment in the Issuer as it deems
appropriate including,without limitation, purchasing additional Shares or
selling some or all of its Shares, and, alone or with others, pursuing
discussions with the Issuer, other stockholders and third parties with regard
to its investment in the Issuer,and/or otherwise changing its intention with
respect to any and all matters referred to in Item 4 of Schedule 13D.
Item 5. Interest in Securities of the Company.
(a) The aggregate percentage of Shares reported to be beneficially
owned by the Reporting Person is based upon the total of 101,774M common stocks
outstanding, registered at Bloomberg December 03, 2009.
As of the close of business on December 03, 2009, the Reporting
Person beneficially owned 5,23 % of the shares outstanding.
CUSIP NO. 56845T305 SCHEDULE 13D PAGE 5 OF 7 PAGES
(b) The Reporting Person voting and dispositive powers over more than
5 % of the Shares, which powers are exercised by the Investment Director.
(See details in (C) below)
(c) Information concerning transactions in the Shares effected by the
Reporting Person during the past sixty days is:
Trade Settle
Date Date Quantity
08.10.2009 14.10.2009 2600
14.10.2009 19.10.2009 8000
22.10.2009 27.10.2009 181564
22.10.2009 27.10.2009 9556
23.10.2009 28.10.2009 300000
23.10.2009 28.10.2009 98000
23.10.2009 28.10.2009 2000
26.10.2009 29.10.2009 188750
26.10.2009 29.10.2009 58750
26.10.2009 29.10.2009 2500
30.10.2009 04.11.2009 16500
24.11.2009 30.11.2009 10000
27.11.2009 02.12.2009 70000
03.12.2009 08.12.2009 365000
03.12.2009 08.12.2009 129500
03.12.2009 08.12.2009 5500
PURCHASES:
08.10.2009 14.10.2009 2600
22.10.2009 27.10.2009 181564
22.10.2009 27.10.2009 9556
23.10.2009 28.10.2009 300000
23.10.2009 28.10.2009 98000
23.10.2009 28.10.2009 2000
26.10.2009 29.10.2009 188750
26.10.2009 29.10.2009 58750
26.10.2009 29.10.2009 2500
30.10.2009 04.11.2009 16500
24.11.2009 30.11.2009 10000
27.11.2009 02.12.2009 70000
03.12.2009 08.12.2009 365000
03.12.2009 08.12.2009 129500
03.12.2009 08.12.2009 5500
SALES:
14.10.2009 19.10.2009 8000
(d) No person (other than the Reporting Person) is known to have the
right to receive or the power to direct the receipt of dividends from, or the
proceeds from the sale of, the Shares.
(e) Not applicable.
Item 6. Contracts, Arrangements, Understandings or Relationships with
Respect to Securities of the Company.
Except as otherwise set forth herein, the Reporting Person does not have
any contract, arrangement, understanding or relationship with any person with
respect to any securities of the Issuer.
Item 7. Material to be Filed as Exhibits.
Not applicable
CUSIP NO. 56845T305 SCHEDULE 13D PAGE 6 OF 7 PAGES
SIGNATURES
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Dated: December 04, 2009
SKAGEN Funds (SKAGEN AS)
BY: /s/ Svein Tore Hansen
Name: Svein Tore Hansen
Title: Business Support and Compliance
BY: /s/ Kristian Falnes
Name: Kristian Falnes
Title: Investmetn Director