SLCA Silica Holdings 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 * MACAN WILLIAM ANDREW	2. Issuer Name and Ticker or Trading Symbol U.S. SILICA HOLDINGS, INC. [ SLCA ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) SVP General Counsel
(Last)          (First)          (Middle) C/O US SILICA HOLDINGS INC., 24275 KATY FREEWAY SUITE 600	3. Date of Earliest Transaction (MM/DD/YYYY) 11/8/2019
(Street) KATY, TX 77494 (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	11/8/2019		M		6945	A	$0.00	43738 (1)	D
Common Stock	11/8/2019		F		2732	D	$5.64	41006	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 Unit	(2)	11/8/2019		M			6945	(3)	(3)	Common Stock	6945	$0.00	13888	D

Explanation of Responses:
(1)	Includes 36,793 Restricted Stock Units granted on February 12, 2019 which will vest in three equal installments on the anniversaries of the grant date.
(2)	Each restricted stock unit represents the right to receive, at settlement, one (1) share of common stock.
(3)	The restricted stock units were granted November 8, 2018 and vest 1/3 on each of November 8, 2019, November 8, 2020 and November 8, 2021.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MACAN WILLIAM ANDREW C/O US SILICA HOLDINGS INC. 24275 KATY FREEWAY SUITE 600 KATY, TX 77494			SVP General Counsel

Signatures
/w/ W. Andrew Macan		11/12/2019
**Signature of Reporting Person		Date