USCR US Concrete Inc

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 * Lesley Philip Daren	2. Issuer Name and Ticker or Trading Symbol U.S. CONCRETE, INC. [ USCR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) VP - USC Aggregates
(Last)          (First)          (Middle) 331 N. MAIN STREET	3. Date of Earliest Transaction (MM/DD/YYYY) 6/25/2021
(Street) EULESS, TX 76039 (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	6/25/2021		M		1918 (1)	A	$0	16324	D
Common stock	6/25/2021		F		755	D	$73.70	15569	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
Restricted stock units	(2)	6/25/2021 (1)		M			1918	(3)(4)	(3)(4)	Common stock	1918.0	$0	7672	D

Explanation of Responses:
(1)	The March 1, 2021 stock award's third performance-based target of a 20-day consecutive trading day threshold of $69.23 per share, as set forth in footnote 4, was achieved.
(2)	Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting, or as set forth in footnote 4, two shares of common stock in the aggregate.
(3)	The Restricted Stock Units were granted on March 1, 2021 and will vest as follows: (i) 60% of the total number of the awarded shares are Time-Based and will become vested over three years in equal annual installments from the date of grant, and (ii) the remaining 40% of the awarded shares are Performance-Based, half (or 50%) of which achieved their 20-day VWAP performance hurdle of $58.69 per share on March 19, 2021, and the remaining half of which achieved their 20-day VWAP performance hurdle of $63.82 per share on April 1, 2021. Because the March 1, 2021 RSU awards were granted contingent upon the approval by the Company's shareholders of a proposed LTIP amendment to reload shares at its May 13, 2021 Annual Meeting, the earliest date on which these RSUs could vest was May 13, 2021.
(4)	The Performance-Based portion of the March 1, 2021 Restricted Stock Units would result in vesting into additional shares (effectively making each Performance-Based RSU represent two shares) if the average of the daily VWAP of the Company's stock over any period of 20 consecutive trading days attains (i) $69.23 per share (resulting in the vesting into an additional 1,918 shares) and (ii) $74.95 per share (resulting in the vesting into a further additional 1,918 shares) within the three-year period from the date of grant.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Lesley Philip Daren 331 N. MAIN STREET EULESS, TX 76039			VP - USC Aggregates

Signatures
/s/ CiCi Sepehri, as Attorney-in-Fact for Philip Daren Lesley		6/29/2021
**Signature of Reporting Person		Date