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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1. Name and Address of Reporting Person * Pfanzelter David J   2. Issuer Name and Ticker or Trading Symbol PURE BIOSCIENCE, INC. [PURE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman of the Board (Last) (First) (Middle) 1725 GILLESPIE WAY 3. Date of Earliest Transaction (Month/Day/Year) 09/25/2017 (Street) EL CAJON, CA 92020 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 09/25/2017   M   16,000 A $ 0.6 556,000 D

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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

Warrant

$ 0.75

09/25/2017

D(1)

16,000

07/02/2014

07/02/2019

Common Stock

16,000

(1)

0

D

Warrant

$ 0.6

09/25/2017

A(1)

16,000

07/02/2014

09/25/2017

Common Stock

16,000

(1)

16,000

D

Warrant

$ 0.6

09/25/2017

M(2)

16,000

07/02/2014

09/25/2017

Common Stock

16,000

(2)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Pfanzelter David J 1725 GILLESPIE WAY EL CAJON, CA 92020	X		Chairman of the Board

Signatures

/s/ David Pfanzelter		09/27/2017
**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)	On September 25, 2017, the Issuer completed the initial closing of a tender offer in which the Issuer offered to amend the terms of the outstanding warrants the Issuer issued to investors participating in private placement financings the Issuer completed on August 29, 2014 (the "2014 Warrants"), on November 23, 2015 (the "2015 Warrants") and on January 23, 2017 (the "2017 Warrants"). As part of the tender offer and in order to raise funds to support its continued operations, the Issuer offered to reduce the respective exercise prices of the 2014, 2015 and 2017 Warrants if the holders agreed to exercise their Warrants in cash by September 25, 2017. The Reporting Person holds a 2014 Warrant and elected to participate in the Issuer's tender offer. As a result, the exercise price and the expiration date, among other terms, of the 2014 Warrant held by the Reporting Person were amended.
(2)	In accordance with the terms of the Issuer's tender offer, the Reporting Person exercised his 2014 Warrant in full and in cash on September 25, 2017.

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