# EDGAR Filing Document

**Accession Number:** 0001524741
**File Stem:** 0001140361-23-014245
**Filing Date:** 2023-3
**Character Count:** 2192
**Document Hash:** 4dd0ce84d01c1548b7562281a40ef98c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-23-014245.hdr.sgml**: 20230328

**ACCESSION NUMBER**: 0001140361-23-014245

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20230328

**DATE AS OF CHANGE**: 20230328

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** U.S. SILICA HOLDINGS, INC.
- **CENTRAL INDEX KEY:** 0001524741
- **STANDARD INDUSTRIAL CLASSIFICATION:** MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
- **IRS NUMBER:** 263718801
- **STATE OF INCORPORATION:** TX
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35416
- **FILM NUMBER:** 23769645

**BUSINESS ADDRESS:**
- **STREET 1:** 24275 KATY FREEWAY
- **STREET 2:** SUITE 600
- **CITY:** KATY
- **STATE:** TX
- **ZIP:** 77494
- **BUSINESS PHONE:** (281) 258-2170

**MAIL ADDRESS:**
- **STREET 1:** 24275 KATY FREEWAY
- **STREET 2:** SUITE 600
- **CITY:** KATY
- **STATE:** TX
- **ZIP:** 77494

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GGC USS HOLDINGS, INC.
- **DATE OF NAME CHANGE:** 20110630

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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### <br>

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### SCHEDULE 14A

#### Proxy Statement Pursuant to Section 14(a) of the

#### Securities Exchange Act of 1934

#### (Amendment No.)

#### <br>

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Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ **Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2))**

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to Sec. 240.14a-12

## U.S. Silica Holdings, Inc.

#### (Name of Registrant as Specified in its Charter)

#### N/A

#### (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒ No fee required

☐ Fee paid previously with preliminary materials

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

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