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
	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* Thorp Clay (Last) (First) (Middle) C/O CLEARSIDE BIOMEDICAL, INC. 900 NORTH POINT PARKWAY, SUITE 200 (Street) ALPHARETTA GA 30005 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Clearside Biomedical, Inc. [ CLSD ]	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) 03/21/2018
	4. If Amendment, Date of 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

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	03/21/2018		S		100,000(1)	D	$12.27(2)	3,666,394	I	See Footnotes(3)(4)
Common Stock	03/22/2018		S		33,630(5)	D	$12.07(6)	3,632,764	I	See Footnotes(3)(4)
Common Stock	03/23/2018		S		5,231(7)	D	$12.02(8)	3,627,533	I	See Footnotes(3)(4)

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

Explanation of Responses:

1. Consists of (i) 2,940 shares sold by Hatteras NC Fund, LP ("Hatteras NC"), (ii) 38,350 shares sold by Hatteras Venture Partners III, LP ("HVP III"), (iii) 3,480 shares sold by Hatteras Venture Affiliates III, LP ("HVA III"), (iv) 6,200 shares sold by Hatteras Venture Partners IV, LP ("HVP IV") and (v) 49,030 shares sold by Hatteras Venture Partners IV SBIC, LP ("HVP IV SBIC").

2. This transaction was executed in multiple trades at prices ranging from $12.00 to $12.49, inclusive. The price reported in Column 4 is a weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transactions were effected.

3. The reporting person is one of the general partners of: (i) Hatteras Venture Advisors III, LLC, the general partner of HVP III and HVA III; (ii) Hatteras Venture Advisors IV SBIC, LLC, the general partner of HVP IV SBIC; and (iii) Hatteras Venture Advisors IV, LLC, the general partner of HVP IV and Hatteras NC. HVP III, HVA III, HVP IV SBIC, HVP IV and Hatteras NC are the record holders of the securities, and the reporting person may be deemed to share voting and dispositive power over the securities held by HVP III, HVA III, HVP IV SBIC, HVP IV and Hatteras NC.

4. The reporting person disclaims beneficial ownership of these securities and this report is not an admission that the reporting person is a beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of his pecuniary interest therein.

5. Consists of (i) 989 shares sold by Hatteras NC, (ii) 12,897 shares sold by HVP III, (iii) 1,170 shares sold by HVA III, (iv) 2,085 shares sold by HVP IV and (v) 16,489 shares sold by HVP IV SBIC.

6. This transaction was executed in multiple trades at prices ranging from $12.00 to $12.21, inclusive. The price reported in Column 4 is a weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transactions were effected.

7. Consists of (i) 154 shares sold by Hatteras NC, (ii) 2,006 shares sold by HVP III, (iii) 182 shares sold by HVA III, (iv) 324 shares sold by HVP IV and (v) 2,565 shares sold by HVP IV SBIC.

8. This transaction was executed in multiple trades at prices ranging from $12.00 to $12.10, inclusive. The price reported in Column 4 is a weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transactions were effected.

Remarks:

	/s/ Brian F. Leaf, Attorney-in-Fact for Clay Thorp	03/23/2018
	** 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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