Sec Form 4 Filing - Carberry Christine A. @ KERYX BIOPHARMACEUTICALS INC - 2018-12-11

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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person Carberry Christine A. 2. Issuer Name and Ticker or Trading Symbol KERYX BIOPHARMACEUTICALS INC [ KERX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Operating Officer (Last) (First) (Middle) C/O KERYX BIOPHARMACEUTICALS, INC., ONE MARINA PARK DRIVE, 12TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 12/11/2018 (Street) BOSTON, MA02210 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 12/11/2018 S 10,469 D $ 3.22 100,646 D Common Stock 12/12/2018 D 100,646 ( 1 ) ( 2 ) D 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 Stock Option ( 3 ) 12/12/2018 D 422,500 ( 3 ) ( 3 ) Common Stock 422,500 ( 3 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Carberry Christine A. C/O KERYX BIOPHARMACEUTICALS, INC. ONE MARINA PARK DRIVE, 12TH FLOOR BOSTON, MA02210 Chief Operating Officer Signatures /s/ Daniel Kajunski, Attorney-in-Fact 12/13/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Disposed of pursuant to the Agreement and Plan of Merger, dated June 28, 2018, by and between Keryx Biopharmaceuticals, Inc. ("Keryx"), Akebia Therapeutics, Inc. ("Akebia") and Alpha Therapeutics Merger Sub Inc., as amended on October 1, 2018 (the "Merger Agreement"), whereby each share of common stock of Keryx was canceled and automatically converted into 0.37433 shares of common stock of Akebia (the "Exchange Ratio"), with fractional shares being paid in cash as provided in the Merger Agreement. ( 2 )(Continued from footnote 1) The market value of each share of Akebia common stock received is $8.94, based on the closing trading price of Akebia common stock on December 12, 2018. Includes 41,250 shares of restricted stock, the vesting of which was accelerated as a result of a termination of the reporting person's employment in connection with the Merger, and each share of restricted stock was cancelled and converted into the right to receive 0.37433 shares of Akebia common stock, with fractional shares being paid in cash. The market value of each share of Akebia common stock received pursuant to the Merger Agreement is $8.94, based on the closing trading price of Akebia common stock on December 12, 2018. ( 3 )Pursuant to the terms of the Merger Agreement, this stock option was cancelled and converted into an option to acquire Akebia common stock, with the number of shares and exercise price adjusted for the Exchange Ratio in accordance with the terms of the Merger Agreement.

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

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.