UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
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OMB
APPROVAL
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OMB
Number: 3235-0145
Expires: February
28, 2009
Estimated
average burden
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SCHEDULE
13G
Under
the Securities Exchange Act of 1934
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(Amendment No.
____)*
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ITC
Holdings Corp
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(Name
of Issuer)
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Common
Shares
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(Title
of Class of Securities)
465685105
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(CUSIP
Number)
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December
31, 2007
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(Date
of Event Which Requires Filing of this Statement)
Check
the appropriate box to designate the rule pursuant to which this Schedule
is filed:
o
Rule 13d-l(d)
*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 the disclosures provided in a prior cover page.
The
information required in 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).
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Page 1 of 5 pages
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CUSIP No.
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465685105
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1.
Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).
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Ecofin
Limited
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2.
Check the Appropriate Box if a Member of a Group (See
Instructions)
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3.
SEC Use Only
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4.
Citizenship or Place of Organization
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United
Kingdom
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Number
of Shares Beneficially by Owned by Each Reporting Person
With:
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5.
Sole Voting Power
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2,195,273
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6.
Shared Voting Power
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7.
Sole Dispositive Power
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2,195,273
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8.
Shared Dispositive Power
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9.
Aggregate Amount Beneficially Owned by Each Reporting Person
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2,195,273
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10. Check
if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions).
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11.
Percent of Class Represented by Amount in Row (9)
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5.2%
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12.
Type of Reporting Person (See Instructions)
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IA
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(a) | o | Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o). | |
(b) | o | Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c). | |
(c) | o | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c). | |
(d) | o | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8). | |
(e) | x | An investment adviser in accordance with §240.13d-l(b)(l)(ii)(E); | |
(f) | o | An employee benefit plan or endowment fund in accordance with §240.13d-l(b)(l)(ii)(F); | |
(g) | o | A parent holding company or control person in accordance with § 240.13d-l(b)(l)(ii)(G); | |
(h) | o | A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); | |
(i) | o | A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3); | |
(j) | o | Group, in accordance with §240.13d-l(b)(l)(ii)(J). |
February 14, 2008 | |||
Date | |||
/s/ John Murray | |||
Signature | |||
John Murray, Director | |||
Name/Title |