SEC Form 4

FORM 4		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 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* PERCEPTIVE ADVISORS LLC (Last) (First) (Middle) 51 ASTOR PLACE, 10TH FLOOR (Street) NEW YORK NY 10003 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol CATABASIS PHARMACEUTICALS INC [ CATB ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 02/01/2021
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

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

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 Securities Underlying Derivative Security (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: 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 X Convertible Preferred Stock	(1)	02/01/2021		A		4,851		(1)	(1)	Common Stock	4,851,000	$3,009.53	4,851	I	See footnote(2)(4)
Series X Convertible Preferred Stock	(1)	02/01/2021		A		1,617		(1)	(1)	Common Stock	1,617,000	$3,009.53	30,920	I	See footnote(3)(4)

1. Name and Address of Reporting Person* PERCEPTIVE ADVISORS LLC (Last) (First) (Middle) 51 ASTOR PLACE, 10TH FLOOR (Street) NEW YORK NY 10003 (City) (State) (Zip)

1. Name and Address of Reporting Person* PERCEPTIVE LIFE SCIENCES MASTER FUND LTD (Last) (First) (Middle) 51 ASTOR PLACE, 10TH FLOOR (Street) NEW YORK NY 10003 (City) (State) (Zip)

1. Name and Address of Reporting Person* Xontogeny, LLC (Last) (First) (Middle) 51 ASTOR PLACE, 10TH FLOOR (Street) NEW YORK NY 10003 (City) (State) (Zip)

1. Name and Address of Reporting Person* Perceptive Xontogeny Venture Fund, LP (Last) (First) (Middle) 51 ASTOR PLACE, 10TH FLOOR (Street) NEW YORK NY 10003 (City) (State) (Zip)

1. Name and Address of Reporting Person* EDELMAN JOSEPH (Last) (First) (Middle) 51 ASTOR PLACE, 10TH FLOOR (Street) NEW YORK NY 10003 (City) (State) (Zip)

Explanation of Responses:

1. Upon stockholder approval of the conversion of Series X Convertible Preferred Stock into shares of common stock, each share of Series X Non-Voting Convertible Preferred Stock automatically converts into 1,000 shares of Common Stock, subject to certain limitations.

2. The securities are directly held by Perceptive Life Sciences Master Fund Ltd. (the "Master Fund"). Perceptive Advisors LLC (the "Advisor") serves as the investment manager of Master Fund. Joseph Edelman is the managing member of the Advisor. Each of Mr. Edelman and the Advisor disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein, and this report shall not be deemed an admission that either Mr. Edelman or the Advisor is the beneficial owner of such securities for purposes of Section 16 or for any other purposes.

3. 3. The securities are directly held by Perceptive Xontogeny Ventures, L.P. ("PXV"). The Advisor serves as the investment manager of PXV, and Perceptive Xontogeny Ventures GP, LLC ("PXV GP") is the general partner of PXV. Mr. Edelman is the managing member of PXV GP and the Advisor. The Advisor, PXV GP and Mr. Edelman disclaim, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his or its indirect pecuniary interest therein, and this report shall not be deemed an admission that they are the beneficial owner of such securities for purposes of Section 16 or for any other purposes.

4. The securities reported herein were purchased from the Issuer pursuant to a Securities Purchase Agreement.

	/s/ Joseph Edelman - for Perceptive Advisors LLC, By: Joseph Edelman, its managing member	02/03/2021
	/s/ Joseph Edelman - for Perceptive Life Sciences Master Fund Ltd, By: Perceptive Advisors LLC, its investment manager, By: Joseph Edelman, its managing member	02/03/2021
	/s/ Joseph Edelman - for Xontogeny LLC, By: C2 Ventures, LLC, By: Joseph Edelman, its managing member	02/03/2021
	/s/ Joseph Edelman - for Perceptive Xontogeny Venture Fund L.P., By: Perceptive Xontogeny Ventures GP, LLC, its general partner, By: Joseph Edelman, its managing member	02/03/2021
	/s/ Joseph Edelman	02/03/2021
	** Signature of Reporting Person	Date
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).
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