FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

PETRELLO ANTHONY G
2. Issuer Name and Ticker or Trading Symbol

NABORS INDUSTRIES LTD [ NBR ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
CHAIRMAN, PRESIDENT & CEO
(Last)          (First)          (Middle)

C/O NABORS CORPORATE SERVICES, 515 WEST GREENS ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)

5/3/2021
(Street)

HOUSTON, TX 77067
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 5/3/2021  C(1)  123 (1)A$0 140025 I Trust 
Common Stock         210357 D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
6.00% Mandatory Convertible Preferred Shares, Series A $0 5/3/2021  C (1)    900 (1)  (2) (2)Common Stock 123 (1)$0 0 I Trust 

Explanation of Responses:
(1) On May 3, 2021, the mandatory conversion date, each of the 900 shares of 6.00% Mandatory Convertible Preferred Shares, Series A (the "Preferred Shares"), held by the Reporting Person was automatically converted into 0.1372 of the Issuer's common shares, for a total of 123 common shares. The Reporting Person also received cash in lieu of fractional common shares pursuant to the mandatory conversion. The acquisition of the Preferred Shares on February 27, 2020 and February 28, 2020 was originally inadvertently disclosed on Table I to a Form 4 filed on March 3, 2020.
(2) Mandatory conversion date of May 3, 2021.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
PETRELLO ANTHONY G
C/O NABORS CORPORATE SERVICES
515 WEST GREENS ROAD
HOUSTON, TX 77067
X
CHAIRMAN, PRESIDENT & CEO

Signatures
/s/ Mark D. Andrews by Power of Attorney for Anthony G. Petrello5/5/2021
**Signature of Reporting PersonDate

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