Spectrum Equity Investors V L P SC 13G Rightside Group, LTD.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No.     )*

Rightside Group, Ltd.

(Name of Issuer)

Common Stock, $0.0001 par value per share

(Title of Class of Securities)

76658B100

(CUSIP Number)

August 1, 2014

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

¨ Rule 13d-1(b)

¨ Rule 13d-1(c)

x Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

1	NAMES OF REPORTING PERSONS Spectrum Equity Investors V, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) PN

Page 2 of 15

1	NAMES OF REPORTING PERSONS Spectrum Equity Associates V, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) PN

Page 3 of 15

1	NAMES OF REPORTING PERSONS SEA V Management, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) OO

Page 4 of 15

1	NAMES OF REPORTING PERSONS Spectrum V Investment Managers’ Fund, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) PN

Page 5 of 15

1	NAMES OF REPORTING PERSONS Brion B. Applegate
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

Page 6 of 15

1	NAMES OF REPORTING PERSONS William P. Collatos
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

Page 7 of 15

1	NAMES OF REPORTING PERSONS Randy J. Henderson
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

Page 8 of 15

1	NAMES OF REPORTING PERSONS Kevin J. Maroni
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

Page 9 of 15

1	NAMES OF REPORTING PERSONS Christopher T. Mitchell
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

Page 10 of 15

1	NAMES OF REPORTING PERSONS Victor E. Parker, Jr.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a)  ¨        (b)  ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 0
		6	SHARED VOTING POWER 2,770,540
		7	SOLE DISPOSITIVE POWER 0
		8	SHARED DISPOSITIVE POWER 2,770,540
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,770,540
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 15.0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

Page 11 of 15

Item 1(a). Name of Issuer: Rightside Group, Ltd. (the “Issuer”).

Item 1(b). Address of Issuer’s Principal Executive Offices: 5808 Lake Washington Blvd. NE, Suite 300, Kirkland, Washington 98033.

Item 2(a). Names of Persons Filing: This statement is being filed by Spectrum Equity Investors V, L.P. (“SEI V”); Spectrum Equity Associates V, L.P. (“SEA V”), which is the sole general partner of SEI V; Spectrum V Investment Managers’ Fund, L.P. (“IMF V”); SEA V Management, LLC (“SEA V Management” and, together with SEI V, SEA V, and IMF V, the “Fund V Entities”), which is the sole general partner of SEA V and the sole general partner of IMF V; Brion B. Applegate (“Applegate”), William P. Collatos (“Collatos”), Randy J. Henderson (“Henderson”), Kevin J. Maroni (“Maroni”), Christopher T. Mitchell (“Mitchell”), and Victor E. Parker, Jr. (“Parker” and, together with Applegate, Collatos, Henderson, Maroni, and Mitchell, the “Managers”). The Managers are the individual managing directors of SEA V Management. The persons and entities named in this paragraph are referred to individually herein as a “Reporting Person” and collectively as the “Reporting Persons.”

Item 2(b). Address of Principal Business Office or, if None, Residence: The address of the principal business office of Collatos, Maroni, and Mitchell is Spectrum Equity Investors, One International Place, 35^th Floor, Boston, MA 02110. The address of the principal business office of SEI V, SEA V, IMF V, SEA V Management, Applegate, Henderson, and Parker is Spectrum Equity Investors, 140 New Montgomery, 20^th Floor, San Francisco, CA 94105.

Item 2(c). Citizenship: Each of SEI V, IMF V, and SEA V is a limited partnership organized under the laws of the State of Delaware. SEA V Management is a limited liability company organized under the laws of the State of Delaware. Each of the Managers is a United States of America citizen.

Item 2(d). Title of Class of Securities: Common Stock, $0.0001 par value (“Common Stock”).

Item 2(e). CUSIP Number: 76658B100

Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), checkwhether the person filing is a:

Not applicable.

Item 4. Ownership.

(a) SEI V is the record owner of 2,756,688 shares of Common Stock as of December 31, 2014 (the “SEI V Shares”). As the sole general partner of SEI V, SEA V may be deemed to own beneficially the SEI V Shares. IMF V is the record owner of 13,852 shares of Common Stock as of December 31, 2014 (the “IMF V Shares” and, together with the SEI V Shares, the “Fund V Shares”). As the sole general partner of SEA V and the sole general partner of IMF V, SEA V Management may be deemed to own beneficially the Fund V Shares. As the individual managing directors of SEA V Management, each of the Managers may also be deemed to own beneficially the Fund V Shares. By virtue of their relationship as affiliated entities, whose controlling entities have overlapping individual controlling persons, each of the Fund V Entities may be deemed to share the power to direct the disposition and vote of the Fund V Shares for an aggregate of 2,770,540 shares.

Page 12 of 15

(b) Percent of Class: See Line 11 of cover sheets. The percentages set forth on the cover sheets for each Reporting Person are calculated based on 18,492,644 shares of Common Stock reported by the Issuer to be outstanding as of November 10, 2014.

(c) Number of shares as to which such person has:

(i) sole power to vote or to direct the vote: See Line 5 of cover sheets.

(ii) shared power to vote or to direct the vote: See Line 6 of cover sheets.

(iii) sole power to dispose or to direct the disposition of: See Line 7 of cover sheets.

(iv) shared power to dispose or to direct the disposition of: See Line 8 of cover sheets.

Each Reporting Person disclaims beneficial ownership of such shares of Common Stock except for the shares, if any, such Reporting Person holds of record.

Item 5. Ownership of Five Percent or Less of a Class.

Not applicable.

Item 6. Ownership of More than Five Percent on Behalf of Another Person.

Not applicable.

Item 7. Identification and Classification of the Subsidiary

Which Acquired the Security Being Reported on by the Parent Holding Company.

Not applicable.

Item 8. Identification and Classification of Members of the Group.

Not applicable.

Item 9. Notice of Dissolution of Group.

Not applicable.

Item 10. Certification.

Not applicable. This statement on Schedule 13G is not filed pursuant to Rule13d-1(b) or Rule 13d–1(c).

Page 13 of 15

SIGNATURE

After reasonable inquiry and to the best of its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Date: January 21, 2015

Spectrum Equity Investors V, L.P.
By:	Spectrum Equity Associates V, L.P.
	its general partner
	By:	SEA V Management, LLC
		its general partner
		By:	*
			Randy J. Henderson
			Managing Director
Spectrum Equity Associates V, L.P.
By:	SEA V Management, LLC
	its general partner
	By:	*
		Randy J. Henderson
		Managing Director
SEA V Management, LLC
By:	*
	Randy J. Henderson
	Managing Director
Spectrum V Investment Managers’ Fund, L.P.
By:	SEA V Management, LLC
	its general partner
	By:	*
		Randy J. Henderson
		Managing Director
*
Brion B. Applegate
*
William P. Collatos

Page 14 of 15

        *

Randy J. Henderson

        *

Kevin J. Maroni

        *

Christopher T. Mitchell

        *

Victor E. Parker, Jr.

*By:	/s/ Randy J. Henderson
	Randy J. Henderson
	As attorney-in-fact

This Schedule 13G was executed by Randy J. Henderson on behalf of the individuals listed above pursuant to a Power of Attorney, a copy of which is attached asExhibit 2.

Page 15 of 15