SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13D

(RULE 13D - 101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(a)

(Amendment No. 4)*

Dover Saddlery, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

260412101

(CUSIP Number)

Glenhill Advisors, LLC

600 Fifth Avenue, 11th Floor

New York, NY 10020

Tel. (646) 432-0600

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

July 1, 2015

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box ¨.

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

*	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 disclosures provided in a prior cover page.

The information required on 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 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 I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Glenhill Advisors, LLC
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ¨ (b) ¨
3.	SEC USE ONLY
4.	SOURCE OF FUNDS WC
5.	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ¨
6.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		7.	SOLE VOTING POWER 0
		8.	SHARED VOTING POWER 0
		9.	SOLE DISPOSITIVE POWER 0
		10.	SHARED DISPOSITIVE POWER 0
11.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0
12.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ¨
13.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0%
14.	TYPE OF REPORTING PERSON IA, HC


1.	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Glenn J. Krevlin
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ¨ (b) ¨
3.	SEC USE ONLY
4.	SOURCE OF FUNDS WC
5.	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ¨
6.	CITIZENSHIP OR PLACE OF ORGANIZATION United States
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		7.	SOLE VOTING POWER 0
		8.	SHARED VOTING POWER 0
		9.	SOLE DISPOSITIVE POWER 0
		10.	SHARED DISPOSITIVE POWER 0
11.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0
12.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ¨
13.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0%
14.	TYPE OF REPORTING PERSON IN, HC


1.	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Glenhill Capital Advisors, LLC
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ¨ (b) ¨
3.	SEC USE ONLY
4.	SOURCE OF FUNDS WC
5.	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ¨
6.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		7.	SOLE VOTING POWER 0
		8.	SHARED VOTING POWER 0
		9.	SOLE DISPOSITIVE POWER 0
		10.	SHARED DISPOSITIVE POWER 0
11.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0
12.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ¨
13.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0%
14.	TYPE OF REPORTING PERSON IA


1.	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Glenhill Capital Management, LLC
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ¨ (b) ¨
3.	SEC USE ONLY
4.	SOURCE OF FUNDS WC
5.	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ¨
6.	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		7.	SOLE VOTING POWER 0
		8.	SHARED VOTING POWER 0
		9.	SOLE DISPOSITIVE POWER 0
		10.	SHARED DISPOSITIVE POWER 0
11.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0
12.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ¨
13.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0%
14.	TYPE OF REPORTING PERSON IA, HC


1.	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Glenhill Capital Overseas Master Fund, LP
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ¨ (b) ¨
3.	SEC USE ONLY
4.	SOURCE OF FUNDS WC
5.	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ¨
6.	CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		7.	SOLE VOTING POWER 0
		8.	SHARED VOTING POWER 0
		9.	SOLE DISPOSITIVE POWER 0
		10.	SHARED DISPOSITIVE POWER 0
11.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0
12.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ¨
13.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0%
14.	TYPE OF REPORTING PERSON PN

This Amendment No. 4 amends the Schedule 13D filed November 28, 2005 (the “Schedule 13D”), as amended by Amendment No. 1 filed June 20, 2007, Amendment No. 2 filed July 6, 2011 and Amendment No. 3 filed May 21, 2015, and is filed by Glenhill Advisors, LLC, Glenn J. Krevlin, Glenhill Capital Management, LLC, Glenhill Capital Advisors, LLC and Glenhill Capital Overseas Master Fund LP (the “Reporting Persons”), with respect to the common stock, $0.0001 par value (the “Common Stock”), of Dover Saddlery, Inc. (the “Company”). Capitalized terms used herein but not defined herein shall have the meanings attributed to them in the Schedule 13D.

Item 5. Interest in Securities of the Issuer.

Item 5(a) is hereby amended and restated as follows:

The responses of the Reporting Persons to Rows (11) through (13) of the cover pages of this Amendment No. 4 are incorporated herein by reference.

On July 1, 2015, the Company announced the completion of its merger with a company formed by Webster Capital. The Company’s shareholders, including Glenhill Capital Overseas Master Fund, LP (which directly owned 908,983 shares prior to the merger), received cash consideration of $8.50 per share in the merger. The merger proceeds were distributed to Glenhill Capital Overseas Master Fund, LP on July 3, 2015. Following the merger, Glenhill Capital Overseas Master Fund, LP owned no shares of the Company.

Item 5(b) is hereby amended to add the following:

The Reporting Persons no longer own any Common Stock of the Company.

Item 5(c) is hereby amended to add the following:

The responses of the Reporting Persons to Item 5(a) of this Amendment No. 4 are incorporated herein by reference.

SIGNATURES

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

Dated: July 7, 2015


GLENHILL ADVISORS, LLC

By:		/s/ Glenn J. Krevlin
Name:		Glenn J. Krevlin
Title:		Managing Member

/s/ Glenn J. Krevlin
GLENN J. KREVLIN

GLENHILL CAPITAL ADVISORS, LLC

By:		KREVLIN MANAGEMENT, INC. Managing Member

By:		/s/ Glenn J. Krevlin
Name:		Glenn J. Krevlin
Title:		Managing Member

GLENHILL CAPITAL MANAGEMENT, LLC

By:		GLENHILL ADVISORS, LLC Managing Member

By:		/s/ Glenn J. Krevlin
Name:		Glenn J. Krevlin
Title:		Managing Member

GLENHILL CAPITAL OVERSEAS MASTER FUND LP

By:		GLENHILL CAPITAL OVERSEAS GP, LTD General Partner

By:		GLENHILL CAPITAL MANAGEMENT, LLC Sole Shareholder

By:		GLENHILL ADVISORS, LLC Managing Member

By:		/s/ Glenn J. Krevlin
Name:		Glenn J. Krevlin
Title:		Managing Member

DOVER SADDLERY INC SC 13D/A