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* Radius Venture Partners III, LLC (Last) (First) (Middle) 250 PARK AVENUE SUITE 1102 (Street) NEW YORK NY 10177 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol TACTILE SYSTEMS TECHNOLOGY INC [ TCMD ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 09/15/2017
	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
Common Stock	09/15/2017		S		75,373	D	$31.02(1)	75,396	I	By Radius Venture Partners III, LP(2)
Common Stock	09/15/2017		S		821,902	D	$31.02(1)	822,147	I	By Radius Venture Partners III QP, LP(3)
Common Stock	09/15/2017		S		103,225	D	$31.02(1)	103,255	I	By Radius Venture Partners III (Ohio) LP(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

1. Name and Address of Reporting Person* Radius Venture Partners III, LLC (Last) (First) (Middle) 250 PARK AVENUE SUITE 1102 (Street) NEW YORK NY 10177 (City) (State) (Zip)

1. Name and Address of Reporting Person* RADIUS VENTURE PARTNERS III L P (Last) (First) (Middle) 250 PARK AVENUE SUITE 1102 (Street) NEW YORK NY 10177 (City) (State) (Zip)

1. Name and Address of Reporting Person* Radius Venture Partners III QP, L.P. (Last) (First) (Middle) 250 PARK AVENUE SUITE 1102 (Street) NEW YORK NY 10177 (City) (State) (Zip)

1. Name and Address of Reporting Person* Radius Venture Partners III (OHIO), LP (Last) (First) (Middle) 250 PARK AVENUE SUITE 1102 (Street) NEW YORK NY 10177 (City) (State) (Zip)

1. Name and Address of Reporting Person* LUBIN DANIEL C (Last) (First) (Middle) 250 PARK AVENUE SUITE 1102 (Street) NEW YORK NY 10177 (City) (State) (Zip)

Explanation of Responses:

1. Represents public offering price of $33.00 per common share less the underwriter's discount of $1.98 per common share.

2. These securities are held directly by Radius Venture Partners III, L.P. and indirectly by Radius Venture Partners III, LLC, the general partner of Radius Venture Partners III QP, L.P., Jordan S. Davis, managing member of Radius Venture Partners III, LLC, and Daniel C. Lubin, managing member of Radius Venture Partners III, LLC. Mr. Davis is a director of the Issuer and files separate Section 16 reports. Each of Radius Venture Partners III, LLC, Mr. Davis and Mr. Lubin may be deemed to beneficially own such securities, and disclaims such beneficial ownership except to the extent of its or his pecuniary interest therein.

3. These securities are held directly by Radius Venture Partners III QP, L.P. and indirectly by Radius Venture Partners III, LLC, the general partner of Radius Venture Partners III QP, L.P., Jordan S. Davis, managing member of Radius Venture Partners III, LLC, and Daniel C. Lubin, managing member of Radius Venture Partners III, LLC. Mr. Davis is a director of the Issuer and files separate Section 16 reports. Each of Radius Venture Partners III, LLC, Mr. Davis and Mr. Lubin may be deemed to beneficially own such securities, and disclaims such beneficial ownership except to the extent of its or his pecuniary interest therein.

4. These securities are held directly by Radius Venture Partners III (Ohio), L.P. and indirectly by Radius Venture Partners III, LLC, the general partner of Radius Venture Partners III (Ohio), L.P., Jordan S. Davis, managing member of Radius Venture Partners III, LLC and Daniel C. Lubin, managing member of Radius Venture Partners III, LLC. Mr. Davis is a director of the Issuer and files separate Section 16 reports. Each of Radius Venture Partners III, LLC, Mr. Davis and Mr. Lubin may be deemed to beneficially own such securities, and disclaims such beneficial ownership except to the extent of its or his pecuniary interest therein.

	RADIUS VENTURE PARTNERS III, LLC By: /s/ Daniel C. Lubin Managing Member	09/15/2017
	RADIUS VENTURE PARTNERS III, L.P. By: Radius Venture Partners III, LLC, its General Partner By: /s/ Daniel C. Lubin Managing Member	09/15/2017
	RADIUS VENTURE PARTNERS III QP, L.P. By: Radius Venture Partners III, LLC, its General Partner By: /s/ Daniel C. Lubin Managing Member	09/15/2017
	RADIUS VENTURE PARTNERS (OHIO) III QP, L.P. By: Radius Venture Partners (Ohio) III, LLC, its General Partner By: Radius Venture Partners III, LLC, its sole member By: /s/ Daniel C. Lubin Managing Member	09/15/2017
	/s/ Daniel C. Lubin	09/15/2017
	** 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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