Sec Form 4 Filing - Flaherty Billie S. @ LANXESS Solutions US Inc. - 2017-04-21

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 Flaherty Billie S. 2. Issuer Name and Ticker or Trading Symbol LANXESS Solutions US Inc. [ CHMT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP, Gnrl. Counsel & Secretary (Last) (First) (Middle) 199 BENSON ROAD 3. Date of Earliest Transaction (MM/DD/YY) 04/21/2017 (Street) MIDDLEBURY, CT06749 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 04/21/2017 D( 1 ) 64,005 D $ 33.5 19,010 D Common Stock 04/21/2017 D( 1 ) 19,010 ( 2 ) D $ 33.5 0 D

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 Employee Stock Option (right to purchase) $ 20.5 04/21/2017 D 15,114 ( 3 ) 03/01/2023 Common Stock 15,114 $ 13 0 D Performance Shares ( 4 ) 04/21/2017 D 29,611 ( 4 ) ( 4 ) Common Stock 29,611 ( 4 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Flaherty Billie S. 199 BENSON ROAD MIDDLEBURY, CT06749 EVP, Gnrl. Counsel & Secretary Signatures /s/ Alan Schutzman by Power of Attorney 04/24/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On September 25, 2016, Chemtura Corporation (the "Company") entered into an Agreement and Plan of Merger (the "Merger Agreement") with Lanxess Deutschland GmbH ("Lanxess") and LANXESS Solutions US Inc. (f/k/a LANXESS Additives Inc.) ("Merger Subsidiary"), pursuant to which Merger Subsidiary will merge (the "Merger") with and into the Company, whereupon the existence of Merger Subsidiary will cease and the Company will become the surviving corporation and a wholly-owned subsidiary of Lanxess. The Merger became effective on April 21, 2017 (the "Effective Time"). Pursuant to the Merger Agreement, each share of the Company's common stock, par value $0.01, outstanding immediately prior to the Effective Time was converted into the right to receive $33.50 in cash, without interest (the "Merger Consideration"). ( 2 )Represents unvested restricted stock units ("RSUs") that were automatically cancelled in connection with the Merger and converted to a deferred cash award in an amount equal to the product of the Merger Consideration and the number of shares represented by such RSUs (the "Deferred Cash Award"). The Deferred Cash Award continues to be subject to the same terms and conditions of the RSUs as in effect immediately prior to the Effective Time and will be paid solely in cash in accordance with the vesting and payment schedule applicable to the RSUs prior to the Effective Time. ( 3 )Pursuant to the terms of the Merger Agreement, each option to purchase Common Stock that was outstanding prior to the Effective Time was cancelled and converted into the right to receive a cash payment equal to the product of (A) the number of shares of Common Stock underlying such option and (B) the excess, if any, of the Merger Consideration over the applicable exercise price of such option. ( 4 )Represents performance share awards relating to Common Stock ("PSAs") that were automatically converted in connection with the Merger to an amount equal to the product of the Merger Consideration and the number of shares represented by such PSAs, which number is based on the target performance level (the "PS Consideration"); provided, however, that in the case of PSAs for which the applicable performance period had not ended as of the Effective Time, such PSAs were converted to a deferred cash award equal to the PS Consideration and continue to be subject to the same terms and conditions of the PSAs as in effect immediately prior to the Effective Time and will be paid solely in cash in accordance with the vesting and payment schedule applicable to the PSAs prior to the Effective Time.

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