OM
GROUP INC.
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||
(Name
of Issuer)
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Common Stock
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||
(Title
of Class of Securities)
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||
670872100
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(CUSIP
Number)
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May 12, 2008
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(Date
of Event Which Requires Filing of this Statement)
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£
|
Rule
13d-1(b)
|
S
|
Rule
13d-1(c)
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£
|
Rule
13d-1(d)
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1.
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Names
of Reporting Persons
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||
Blenheim
Capital Management, L.L.C.
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2.
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Check
the Appropriate box if a Member of Group (See
Instructions)
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(a) |
£
|
|
|
(b) |
S
|
|
3.
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SEC
Use Only
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|
4.
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Citizenship
of Place of Organization:
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Delaware,
USA
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5.
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Sole
Voting Power:
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1,558,500
|
6.
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Shared
Voting Power:
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-0-
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7.
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Sole
Dispositive Power:
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1,558,500
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8.
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Shared
Dispositive Power:
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-0-
|
9.
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Aggregate
Amount Beneficially Owned by Each Reporting Person:
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1,558,500
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10.
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Check
if the Aggregate Amount in Roe (9) Excludes Certain Shares (See
Instructions):_________________
|
|
11.
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Percent
of Class Represented by Amount in Row (9):
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5.1%
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12.
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Type
of Reporting Persons (See Instructions):
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OO*
|
Item 1(a). Name Of Issuer:
|
OM
Group Inc. (the “Issuer”)
|
1.
|
Blenheim
Capital Management, L.L.C.
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(a)
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____
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Broker
or dealer registered under Section 15 of the Exchange
Act.
|
(b)
|
____
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Bank
as defined in Section 3(a)(6) of the Exchange Act.
|
(c)
|
____
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Insurance
Company defined in Section 3(a)(19) of the Exchange
Act.
|
(d)
|
____
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Investment
Company registered under Section 8 of the Investment
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|
Company
Act.
|
|
(e)
|
____
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An
Investment adviser in accordance with Rule
13d-1(b)(1)(ii)(E)
|
(f)
|
____
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An
employee benefit plan or endowment fund in accordance with Rule
13d-1(b)(ii)(F)
|
(g)
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____
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A
parent holding company or control person in accordance
Rule
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|
13d-1(b)(1)(ii)(G)
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(h)
|
____
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A
savings association as defined in Section 3(b) of the
Federal
|
Deposit
Insurance Act.
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(i)
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____
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A
church plan that is excluded from the definition of an investment company
under Section 3(c)(14) of the Investment Company Act;
|
(j)
|
____
|
Group,
in accordance with Rule
13d-1(b)(1)(ii)(J)
|
|
(a)
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Amount
Beneficially owned:
|
|
(i)
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1,558,500
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(b)
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Percent
of Class
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(i)
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5.1%
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(c)
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Number
of Shares as to Which Such Person
Has:
|
(i)
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Sole
power to vote or direct the vote:
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(ii)
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Shared
power to vote or to direct the
vote:
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(iii)
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Sole
power to dispose or to direct the
disposition:
|
(iv)
|
Shared
power to dispose or to direct the disposition
of:
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BLENHEIM
CAPITAL MANAGEMENT, L.L.C.
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By:
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/s/ Joseph Esposito | |
By:
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Joseph Esposito,
Senior Vice President
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