UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. )*
Quanta Capital Holdings LTD
(Name of Issuer)
Common
(Title of Class of Securities)
G7313F106
(CUSIP Number)
December 31, 2006
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
[x] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(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).
PAGE 1 OF 4 PAGES
--------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
NWQ Investment Management Company, LLC 47-0875103
--------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [-]
(b) [-]
--------------------------------------------------------------------------------
3 SEC USE ONLY
--------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware - U.S.A.
--------------------------------------------------------------------------------
5 SOLE VOTING POWER
3,436,830
NUMBER OF -----------------------------------------------------------
SHARES 6 SHARED VOTING POWER
BENEFICIALLY
OWNED BY 0
EACH -----------------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON
WITH 3,728,730
-----------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
--------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,728,730
--------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
--------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.3%
--------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IA
--------------------------------------------------------------------------------
PAGE 2 OF 4 PAGES
Item 1(a) Name of Issuer:
Quanta Capital Holdings LTD
Item 1(b) Address of Issuer's Principal Executive Offices:
1 Victoria Street
Hamilton Hm 11
Bermuda
Item 2(a) Name of Person Filing:
NWQ Investment Management Company, LLC
Item 2(b) Address of the Principal Office or, if none, Residence:
2049 Century Park East, 16th Floor
Los Angeles, CA 90067
Item 2(c) Citizenship:
Delaware - U.S.A.
Item 2(d) Title of Class of Securities:
Common
Item 2(e) CUSIP Number:
G7313F106
Item 3 If the Statement is being filed pursuant to Rule
13d-1(b), or 13d-2(b), check whether the person filing
is a:
(e) [X] An investment advisor in accordance with
section 240.13d-1(b)(1)(ii)(E)
Item 4 Ownership:
(a) Amount Beneficially Owned:
3,728,730
(b) Percent of Class:
5.3%
(c) Number of shares as to which such person has:
(i) sole power to vote or direct the vote: 3,436,830
(ii) shared power to vote or direct the vote: 0
(iii) sole power to dispose or to direct the disposition of:
3,728,730
(iv) shared power to dispose or to direct the disposition of: 0
Item 5 Ownership of Five Percent or Less of a Class:
Not applicable.
PAGE 3 OF 4 PAGES
Item 6 Ownership of More than Five Percent on Behalf of Another Person:
Securities reported on this Schedule 13G are beneficially owned by
clients which may include investment companies registered under the
Investment Company Act and/or employee benefit plans, pensions,
Charitable funds or other institutional and high net worth clients.
Item 7 Identification and Classification of the Subsidiary Which Acquired
the Security Being Reported on By the Parent Holding Company: Not
applicable.
Item 8 Identification and Classification of Members of the Group: Not
applicable.
Item 9 Notice of Dissolution of a Group:
Not applicable.
Item 10 Certification:
By signing below I certify that, to the best of my and belief, the
securities referred to above were acquired and are held in the
ordinary course of business and were not acquired and are not held
for the purpose of or with the effect of changing or influencing the
control of the issuer of such securities and were not acquired in
connection with or as a participant in any transaction having such
purpose or effect.
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: February 9, 2007
NWQ Investment Management Company, LLC
By: /S/ Jon D. Bosse
Jon D. Bosse, CFA
Co-President, Chief Investment Officer
PAGE 4 OF 4 PAGES