UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G/A
Under the Securities Exchange Act of 1934
(Amendment No. 3)
Nabors Industries Ltd.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
G6359F103
(CUSIP Number)
December 31, 2011
(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).
CUSIP No. G6359F103
1. Names of Reporting Person
Wentworth, Hauser & Violich, Inc.
2. Check the Appropriate Box if a Member Of a Group
[ ] (a)
[ ] (b)
3. SEC Use Only
4. Citizenship or Place of Organization
Washington, United States
5. Sole Voting Power: 19,902,343
Number of
Shares 6. Shared Voting Power: 0
Beneficially
Owned by 7. Sole Dispositive Power: 0
Each Reporting
Person With 8. Shared Dispositive Power: 20,655,513
9. Aggregate Amount Beneficially Owned by Each Reporting Person
20,655,513
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
11. Percent of Class Represented by Amount in Row (9)
7.18%
12. Type of Reporting Person
IA
CUSIP No. G6359F103
1. Names of Reporting Person
Hirayama Investments, LLC
2. Check the Appropriate Box if a Member Of a Group
[ ] (a)
[ ] (b)
3. SEC Use Only
4. Citizenship or Place of Organization
Delaware, United States
5. Sole Voting Power: 0
Number of
Shares 6. Shared Voting Power: 0
Beneficially
Owned by 7. Sole Dispositive Power: 0
Each Reporting
Person With 8. Shared Dispositive Power: 20,655,513
9. Aggregate Amount Beneficially Owned by Each Reporting Person
20,655,513
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
11. Percent of Class Represented by Amount in Row (9)
7.18%
12. Type of Reporting Person
IA
Item 1. (a) Name of Issuer: Nabors Industries Ltd.
(b) Address of Issuer's Principal Executive Offices:
Second Floor Crown House
4 Par-la-Ville Ro
Hamilton, HM 08
Bermuda
Item 2. (a) Name of Person Filing:
Wentworth, Hauser & Violich, Inc. ("Wentworth")
Hirayama Investments, LLC ("Hirayama")
(b) Address of Principal Business Offices:
Wentworth, Hauser & Violich, Inc.
301 Battery Street, Suite 400
San Francisco, CA 94111-3203
United States
Hirayama Investments, LLC
301 Battery Street, Suite 400
San Francisco, CA 94111-3203
United States
(c) Citizenship:
Please refer to Item 4 on each cover sheet for each filing person.
(d) Title of Class of Securities
Common Stock
(e) CUSIP Number: G6359F103
Item 3. Wentworth, Hauser & Violich, Inc. is an investment adviser in
accordance with 13d-1(b)(1)(ii)(E); Hirayama Investments, LLC
is an investment adviser in accordance with 13d-1(b)(1)(ii)(E);
Item 4. Ownership
Please see Items 5 - 9 and 11 on each cover sheet for each filing
person.
Under the definition of "beneficial ownership" in Rule 13d-3 under
the Securities Exchange Act of 1934, it is also possible that the
individual directors, executive officers, and/or shareholders of
Wentworth and/or Hirayama might be deemed the "beneficial owners"
of some or all of the securities to which this Schedule 13G/A relates
in that they might be deemed to share the power to direct the voting
or disposition of such securities. Neither the filing of this
Schedule 13G/A nor any of its contents shall be deemed to constitute an
admission that any of such individuals is, for any purpose, the
beneficial owner of any of the securities to which this Schedule 13G/A
relates, and such beneficial ownership is expressly disclaimed.
Item 5. Ownership of Five Percent or Less of a Class
Not Applicable
Item 6. Ownership of More than Five Percent on Behalf of Another Person
Not Applicable
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 Group
Not Applicable
Item 10. Certification
By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and 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 the
securities and were not acquired and are not held in connection with or as a
participant in any transaction having that purpose or effect.
SIGNATURE
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.
Date: February 14, 2012
Wentworth, Hauser & Violich, Inc.
By: /s/ Pavita Fleischer
--------------------------
Name: Pavita Fleischer
Title: Chief Compliance Officer
Hirayama Investments, LLC
By: /s/ Richard K. Hirayama
--------------------------
Name: Richard K. Hirayama
Title: Managing Member
JOINT FILING AGREEMENT
The undersigned hereby agree that the Statement on this Schedule 13G/A, dated
February 14, 2012, with respect to the Common Stock of Nabors Industries Ltd.
is filed on behalf of each of us pursuant to and in accordance with the
provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as
amended, and that this Agreement shall be included as an Exhibit to this
Schedule 13G/A. Each of the undersigned agrees to be responsible for the timely
filing of the Schedule 13G/A, and for the completeness and accuracy of the
information concerning itself contained therein. This Agreement may be
executed in any number of counterparts, all of which taken together shall
constitute one and the same instrument.
IN WITNESS WHEREOF, the undersigned have executed this Agreement as of
the 14th day of February 2012.
Date: February 14, 2012
Wentworth, Hauser & Violich, Inc.
By: /s/ Pavita Fleischer
--------------------------
Name: Pavita Fleischer
Title: Chief Compliance Officer
Hirayama Investments, LLC
By: /s/ Richard K. Hirayama
--------------------------
Name: Richard K. Hirayama
Title: Managing Member