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 * O'Brien Richard D 2. Issuer Name and Ticker or Trading Symbol TETRA TECHNOLOGIES INC [ TTI ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
VP-Finance & Global Controller
(Last)         (First)         (Middle)
24955 INTERSTATE 45 N
3. Date of Earliest Transaction (MM/DD/YYYY)
3/26/2020
(Street)
THE WOODLANDS, TX 77380
(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  3/26/2020    M(1)    61741.00  A $0.00 (1) 61741.00  D   
Common Stock  3/26/2020    M(1)    22638.00  A $0.00 (1) 84379.00  D   
Common Stock  3/26/2020    F(2)    5309.00  D $0.40  79070.00  D   
Common Stock  3/26/2020    F(2)    14711.00  D $0.40  64359.00  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 Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. 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 Date 7. 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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Common Stock  $0.00 (1) 3/26/2020    M (1)       22638.00    (3)  (3) Common Stock  22638.00  $0.00 (1) 45278.00  D   
Common Stock  $0.00 (1) 3/26/2020    M (1)       61741.00    (4)  (4) Common Stock  61741.00  $0.00 (1) 41161.00  D   

Explanation of Responses:
(1)  Represents vested shares of restricted stock units granted on March 26, 2019. Restricted stock units convert into common stock on a one-for-one basis.
(2)  Reflects units surrendered to the Issuer to satisfy tax withholding obligations upon the vesting of the restricted stock unit granted on March 26, 2019.
(3)  The remaining unvested portion of this restricted stock unit award will vest every six months until fully vested on March 26, 2022. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock upon vesting of the unit.
(4)  The remaining unvested portion of this restricted stock unit award will vest on March 26, 2021. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock upon vesting of the unit.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
O'Brien Richard D
24955 INTERSTATE 45 N
THE WOODLANDS, TX 77380


VP-Finance & Global Controller

Signatures
Kimberly M. O'Brien, attorney in fact 3/27/2020
**Signature of Reporting Person Date
Tetra Technologies (GM) (USOTC:TTTNW)
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