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 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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(Print or Type Responses)

1. Name and Address of Reporting Person * Gelbfish Gary A.   2. Issuer Name and Ticker or Trading Symbol CorMedix Inc. [CRMD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O CORMEDIX INC., 1430 U.S. HIGHWAY 206, SUITE 200 3. Date of Earliest Transaction (Month/Day/Year) 12/12/2017 (Street) BEDMINSTER, NJ 07921 4. If Amendment, Date Original Filed(Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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, $0.001 par value per share 12/12/2017(1)   P   52,083 A $ 0.48 2,101,121 D   Common Stock, $0.001 par value per share               14,000 (2) I Landmark Foundation (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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 (Right to Buy Common Stock)

$ 0.37

(3)

08/03/2027

Common Stock, $0.001 par value per share

75,000

75,000

D

Series C-3 Non-Voting Convertible Preferred Stock

(4)

01/08/2014

(4)

Common Stock, $0.001 par value per share

500,000

50,000

D

Warrant (Right to Purchase Common Stock)

$ 0.9

01/08/2015

01/08/2020

Common Stock, $0.001 par value per share

250,000

250,000

D

Series A Common Stock Warrant (5)

$ 0.75

(5)

(5)

Common Stock, $0.001 par value per share

1,000,000

1,000,000

D

Series B Common Stock Warrant (6)

$ 1.05

(6)

(6)

Common Stock, $0.001 par value per share

1,000,000

1,000,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Gelbfish Gary A. C/O CORMEDIX INC. 1430 U.S. HIGHWAY 206, SUITE 200 BEDMINSTER, NJ 07921

Signatures

/s/ Alexander M. Donaldson, by Power of Attorney		12/14/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Purchase was contracted on November 17, 2017, but not closed until December 12, 2017.
(2)	Held by Landmark Foundation, of which Dr. Gelbfish and his wife are trustees.
(3)	These options vest as follows: 1/3 on August 3, 2017, an additional 1/3 on August 3, 2018, and the remaining 1/3 on August 3, 2019.
(4)	The conversion ratio is equal to the stated value of $10.00 divided by the conversion price of $1.00. The Series C-3 Non-Voting Convertible Preferred Stock is perpetual.
(5)	The Series A Common Stock warrant is exercisable any time after the Company publicly announces through the filing of a Current Report on Form 8-K that the Company has received Stockholder Approval and the amendment to the Company's Certificate of Incorporation has become effective (the "Initial Exercise Date"). The warrant shall be exercisable for a period of thirteen months from the Initial Exercise Date.
(6)	The Series B Common Stock warrant is exercisable any time after the Company publicly announces through the filing of a Current Report on Form 8-K that the Company has received Stockholder Approval and the amendment to the Company's Certificate of Incorporation has become effective (the "Initial Exercise Date"). The warrant shall be exercisable for a period of five years from the Initial Exercise Date.

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