Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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 *
  Nichols Andrew John
 2. Date of Event Requiring Statement (Month/Day/Year)
10/03/2016		 3. Issuer Name and Ticker or Trading Symbol
CATABASIS PHARMACEUTICALS INC [CATB]
(Last)
(First)
(Middle)
C/O CATABASIS PHARMACEUTICALS, INC., ONE KENDALL SQ, BLDG 1400E, STE B14202		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Scientific Officer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

CAMBRIDGE, MA 02139		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy)   (1) 03/18/2024 Common Stock 58,365 $ 6.81 D  
Stock Option (right to buy)   (2) 03/25/2025 Common Stock 2,723 $ 11.05 D  
Stock Option (right to buy)   (3) 04/29/2025 Common Stock 7,782 $ 11.05 D  
Stock Option (right to buy)   (4) 02/10/2026 Common Stock 26,000 $ 4.57 D  
Sock Option (right to buy)   (5) 09/07/2026 Common Stock 40,000 $ 4.31 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Nichols Andrew John
C/O CATABASIS PHARMACEUTICALS, INC.
ONE KENDALL SQ, BLDG 1400E, STE B14202
CAMBRIDGE, MA 02139		       Chief Scientific Officer  

Signatures

/s/ Andrew J. Nichols 10/05/2016
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) This option is subject to vesting over a four year period, with 25% of the shares vesting on the first anniversary of February 16, 2014 and the remainder vesting over the ensuing three years at a rate of 2.0833% per month.
(2) This option is subject to vesting over a four year period, with 25% of the shares vesting on the first anniversay of March 26, 2015 and the remainder vesting over the ensuing three years at a rate of 2.0833% per month.
(3) This option is subject to vesting over a four year period, with 25% of the shares vesting on the first anniversary of June 1, 2015 and the remainder vesting over the ensuing three years at a rate of 2.0833% per month.
(4) This option is subject to vesting over a four year period, with 25% of the shares vesting on the first anniversary of February 11, 2016 and the remainder vesting over the ensuing three years at a rate of 2.0833% per month.
(5) This option is subject to vesting over a four year period, with 25% of the shares vesting on the first anniversary of September 8, 2016 and the remainder vesting over the ensuing three years at a rate of 2.0833% per month.

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