Sec Form 4 Filing - ASP FML Holdings, LLC @ FAIRMOUNT SANTROL HOLDINGS INC. - 2018-06-01

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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person ASP FML Holdings, LLC 2. Issuer Name and Ticker or Trading Symbol FAIRMOUNT SANTROL HOLDINGS INC. [ FMSA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O AMERICAN SECURITIES LLC, 299 PARK AVENUE, 34TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 06/01/2018 (Street) NEW YORK, NY10171 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction 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 06/01/2018 D( 1 ) 48,156,628 D $ 0 ( 1 ) 0 D ( 2 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other ASP FML Holdings, LLC C/O AMERICAN SECURITIES LLC 299 PARK AVENUE, 34TH FLOOR NEW YORK, NY10171 X American Securities Partners V, L.P. C/O AMERICAN SECURITIES LLC 299 PARK AVE, 34TH FLOOR NEW YORK, NY10171 X American Securities Partners V(B), L.P. C/O AMERICAN SECURITIES LLC 299 PARK AVE, 34TH FLOOR NEW YORK, NY10171 X American Securities Partners V (C) L.P. C/O AMERICAN SECURITIES LLC 299 PARK AVE, 34TH FLOOR NEW YORK, NY10171 X American Securities Associates V, LLC C/O AMERICAN SECURITIES LLC 299 PARK AVE, 34TH FLOOR NEW YORK, NY10171 X AMERICAN SECURITIES LLC 299 PARK AVE, 34TH FLOOR NEW YORK, NY10171 X ASP FML Investco, LLC C/O AMERICAN SECURITIES LLC 299 PARK AVENUE, 34TH FLOOR NEW YORK, NY10171 X ASP FML Co-Invest I, LLC C/O AMERICAN SECURITIES LLC 299 PARK AVENUE, 34TH FLOOR NEW YORK, NY10171 X ASP Manager Corp. C/O AMERICAN SECURITIES LLC 299 PARK AVENUE, 34TH FLOOR NEW YORK, NY10171 X Signatures /s/ Michael G. Fisch 06/05/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Reflects disposition in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of December 11, 2017 (the "Merger Agreement"), among the Issuer, SCR-Sibelco NV, Unimin Corporation, nka Covia Holdings Corporation ("Covia"), Bison Merger Sub, Inc. ("Merger Sub") and Bison Merger Sub I, LLC ("Merger Sub LLC"), pursuant to which Merger Sub merged with and into the Issuer with the Issuer as the surviving corporation and for the subsequent merger of Issuer with and into Merger Sub LLC with Merger Sub LLC as the surviving corporation and a wholly owned subsidiary of Covia. In the Merger, each share of Issuer Common Stock, par value $0.01 per share, was exchanged for (i) cash consideration equal to $0.73 per fully diluted share (the "Cash Consideration") and (ii) 0.20 shares (the "Exchange Ratio") of voting common stock, par value $1.00 per share, of Covia ("Covia Common Stock"). ( 2 )The shares were directly owned by ASP FML Holdings, LLC ("ASPFMLHoldings") and may also be deemed to have been indirectly beneficially owned by: (i) ASP FML Investco, LLC ("ASPFMLInvestco"), the owner of a majority of the membership interests in ASPFMLHoldings; (ii) American Securities Partners V, L.P., American Securities Partners V(B), L.P. and American Securities Partners V(C), L.P. (each, a "Sponsor") and ASP FML Co-Invest I, LLC ("ASPFMLCoinvest"), the owners of a majority of the membership interests in ASPFMLInvestco; and (iii) American Securities Associates V, LLC ("GP"), the general partner of each Sponsor. American Securities LLC ("ASLLC") provides investment advisory services to each Sponsor and to the GP. ASP Manager Corp., a wholly owned subsidiary of ASLLC, is the manager of ASPFML Holdings, ASPFMLInvestco and ASPFMLCoinvest.

Remarks: Exhibit 99.1 Joint Filer Information is incorporated herein by reference.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

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