Ownership Submission
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 *
Mangiardi Vito J
   2. Issuer Name and Ticker or Trading Symbol
PRESSURE BIOSCIENCES INC [PBIO] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
12 POINT GALLINAS ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
02/06/2013
(Street)

SAN RAFAEL, CA 94903		 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

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
Series J Convertible Preferred Stock $ 0.4 02/06/2013   P   73   02/06/2013(1) 02/06/2016 Common Stock 72,918 (2) 112,918 D (1)  
Series J Common Stock Warrant $ 0.4 02/06/2013   P   72,918   02/06/2016(3) 02/06/2016 Common Stock 72,918 (2) $ 185,836 D (3)  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Mangiardi Vito J
12 POINT GALLINAS ROAD
SAN RAFAEL, CA 94903		   X      

Signatures

 Richard T. Schumacher, Attorney-in-Fact   02/13/2013
**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) The terms of Series J Convertible Preferred Stock contain a limitation on conversion which prevents the Reporting Person from converting shares of Series J Convertible Preferred Stock into Shares of Common stock if, after giving effect to the conversion, the Reporting Person would beneficially own more than 4.99% of the outstanding shares of Common Stock. The Reporting Person may elect to increase this limitation to 9.99%, 14.99% or 19.99% upon not less than 61 days prior written notice to the Company. Since the Reporting Person currently beneficially owns less than 4.99% of the outstanding shares of Common Stock, the conversion limitation that applies to the Reporting Person is the 4.99% limitation. The Reporting Person disclaims beneficial ownership of such securities except to the extent of the Reporting Person's pecuniary interest in such securities.
(2) Pursuant to a certain Securities Purchase Agreement, dated February 6, 2013, among the Company, the Reporting Person and the other purchasers named therein, the Reporting Person purchased 73 "Units" at a purchase price of $400.00 per Unit. Each Unit consisted of (i) one share of Series J Convertible Preferred Stock, convertible into 1,000 shares of the Company's Common Stock, and (ii) a warrant to purchase 1,000 shares of Common Stock, which warrant is exercisable until February 6, 2016.
(3) The Series J Common Stock Purchase Warrants contain a limitation on exercise which prevents the Reporting Person from exercising any Warrants if, after giving effect to the exercise, the Reporting Person would beneficially own more than 4.99% of the outstanding shares of Common Stock. The Reporting Person may elect to increase this limitation to 9.99%, 14.99% or 19.99% upon not less than 61 days prior written notice to the Company. Since the Reporting Person currently beneficially owns less than 4.99% of the outstanding shares of Common Stock, the conversion limitation that applies to the Reporting Person is the 4.99% limitation. The Reporting Person disclaims beneficial ownership of such securities except to the extent of the Reporting Person's pecuniary interest in such securities.

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