SC 13D/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 10)*

SOTHEBY’S

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

835898107

(CUSIP Number)

Richard T. McGuire III

Marcato Capital Management LP

One Montgomery Street, Suite 3250

San Francisco, CA 94104

(415) 796-6350

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

COPIES TO:

Jeffrey L. Kochian, Esq.

Akin Gump Strauss Hauer & Feld LLP

One Bryant Park

New York, NY 10036

(212) 872-1000

May 29, 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 that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-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 §240.13d-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 (“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).

CUSIP No. 835898107

1	Names of Reporting Persons MARCATO CAPITAL MANAGEMENT LP
2	Check the Appropriate Box If a Member of a Group (See Instructions) a.  ¨        b.  x
3	SEC Use Only
4	Source of Funds (See Instructions) AF
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 6,571,806
		9	Sole Dispositive Power 0
		10	Shared Dispositive Power 6,571,806
11	Aggregate Amount Beneficially Owned by Each Reporting Person 6,571,806
12	Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) ¨
13	Percent of Class Represented By Amount in Row (11) 9.46%
14	Type of Reporting Person (See Instructions) IA

CUSIP No. 835898107

1	Names of Reporting Persons RICHARD T. MCGUIRE III
2	Check the Appropriate Box If a Member of a Group (See Instructions) a.  ¨        b.  x
3	SEC Use Only
4	Source of Funds (See Instructions) AF
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 OF AMERICA
Number of Shares Beneficially Owned By Each Reporting Person With		7	Sole Voting Power 0
		8	Shared Voting Power 6,571,806
		9	Sole Dispositive Power 0
		10	Shared Dispositive Power 6,571,806
11	Aggregate Amount Beneficially Owned by Each Reporting Person 6,571,806
12	Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) ¨
13	Percent of Class Represented By Amount in Row (11) 9.46%
14	Type of Reporting Person (See Instructions) IN

CUSIP No. 835898107

1	Names of Reporting Persons MARCATO, L.P.
2	Check the Appropriate Box If a Member of a Group (See Instructions) a.  ¨        b.  x
3	SEC Use Only
4	Source of Funds (See Instructions) 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 1,532,742
		9	Sole Dispositive Power 0
		10	Shared Dispositive Power 1,532,742
11	Aggregate Amount Beneficially Owned by Each Reporting Person 1,532,742
12	Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) ¨
13	Percent of Class Represented By Amount in Row (11) 2.21%
14	Type of Reporting Person (See Instructions) PN

CUSIP No. 835898107

1	Names of Reporting Persons MARCATO II, L.P.
2	Check the Appropriate Box If a Member of a Group (See Instructions) a.  ¨        b.  x
3	SEC Use Only
4	Source of Funds (See Instructions) 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 103,867
		9	Sole Dispositive Power 0
		10	Shared Dispositive Power 103,867
11	Aggregate Amount Beneficially Owned by Each Reporting Person 103,867
12	Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) ¨
13	Percent of Class Represented By Amount in Row (11) 0.15%
14	Type of Reporting Person (See Instructions) PN

CUSIP No. 835898107

1	Names of Reporting Persons MARCATO INTERNATIONAL MASTER FUND, LTD.
2	Check the Appropriate Box If a Member of a Group (See Instructions) a.  ¨        b.  x
3	SEC Use Only
4	Source of Funds (See Instructions) 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 4,935,197
		9	Sole Dispositive Power 0
		10	Shared Dispositive Power 4,935,197
11	Aggregate Amount Beneficially Owned by Each Reporting Person 4,935,197
12	Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) ¨
13	Percent of Class Represented By Amount in Row (11) 7.10%
14	Type of Reporting Person (See Instructions) OO

CUSIP No. 835898107

SCHEDULE 13D

This Amendment No. 10 supplements the information set forth in the Schedule 13D filed by the Reporting Persons with the United States Securities and Exchange Commission (the “SEC”) on July 30, 2013, as amended from time to time (the “Schedule 13D”), relating to Common Stock, par value $0.01 per share (the “Shares”), of Sotheby’s, a Delaware corporation (the “Issuer”). All capitalized terms contained herein but not otherwise defined shall have the meanings ascribed to such terms in the Schedule 13D.

The information set forth in response to each separate Item below shall be deemed to be a response to all Items where such information is relevant. The Schedule 13D is hereby supplementally amended as follows:

Item 4. Purpose of Transaction.

On May 29, 2015, Marcato filed a Notice of Challenge to Confidential Treatment with the Delaware Chancery Court (the “Second Notice”), challenging the confidential treatment of certain documents from prior legal proceedings involving the Issuer that are filed under seal with the court and are not available in the public court file. The legal proceedings, captioned Third Point LLC v. Ruprecht (Case No. 9469-VCP), involved a dispute between a large shareholder of the Issuer and members of its Board of Directors. The resolution of that dispute was announced on May 5, 2014, but completely unredacted versions of certain court filings remain unavailable to the public. In the Second Notice, Marcato maintains that the information in the documents under seal does not appear to be the type of proprietary information that would warrant protection from release by the court, and in any event, sufficient time has passed since the action concluded to warrant unsealing. Furthermore, in an order dated May 7, 2015, the Delaware Chancery Court granted Marcato’s previously disclosed request to unseal plaintiff Third Point LLC’s Opening Brief in Support of Its Motion for Preliminary Injunction (the “Third Point Brief”), filed on April 29, 2014, and the Third Point Brief was thereafter released to the court file in unredacted form.

The foregoing description of the Second Notice does not purport to be complete and is qualified in its entirety by reference to the full text of the Second Notice, which is filed as Exhibit 8, and is incorporated herein by reference.

Item 5. Interest in Securities of the Issuer.

(a) - (e) As of the date hereof, (i) Marcato and Mr. McGuire may be deemed to be the beneficial owners of 6,571,806 Shares (the “Marcato Shares”) constituting 9.46% of the Shares, (ii) Marcato, L.P. may be deemed to be the beneficial owner of 1,532,742 Shares, constituting 2.21% of the Shares, (iii) Marcato II, L.P. may be deemed to be the beneficial owner of 103,867 Shares, constituting 0.15% of the Shares and (iv) Marcato International Master Fund, Ltd. may be deemed to be the beneficial owner of 4,935,197 Shares, constituting 7.10% of the Shares, each based upon a total of 69,488,135 Shares outstanding as of April 30, 2015 (based on the Issuer’s Form 10-Q, filed with the SEC on May 11, 2015).

Marcato, L.P. may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) 1,532,742 Shares. Marcato II, L.P. may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) 103,867 Shares. Marcato International Master Fund, Ltd. may be deemed to have the shared power to vote or direct vote of (and the shared power to dispose or direct the disposition of) 4,935,197 Shares. Marcato, as the investment manager of Marcato, L.P., Marcato II, L.P. and Marcato International Master Fund, Ltd., may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) the Marcato Shares. By virtue of Mr. McGuire’s position as managing partner of Marcato, Mr. McGuire may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose or direct the disposition of) the Marcato Shares and, therefore, Mr. McGuire may be deemed to be the beneficial owner of the Marcato Shares.

Except as set forth in previous amendments to this Schedule 13D, the transactions by the Reporting Persons in the securities of the Issuer during the past sixty days are set forth in Exhibit 2.

The limited partners of (or investors in) each of Marcato, L.P., Marcato II, L.P., and Marcato International Master Fund, Ltd., or their respective subsidiaries or affiliated entities, for which Marcato or its affiliates acts as general partner and/or investment manager have the right to participate in the receipt of dividends from, or proceeds from the sale of, the Shares held for the accounts of their respective funds in accordance with their respective limited partnership interests (or investment percentages) in their respective funds.

Item 7. Material to be Filed as Exhibits.

Exhibit 2 – Transactions.

Exhibit 8 – Notice of Challenge to Confidential Treatment.

SIGNATURES

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

Date: June 1, 2015	MARCATO CAPITAL MANAGEMENT LP
	By:	Marcato Holdings LLC
	By:	/s/ Richard T. McGuire III
		Richard T. McGuire III
		Authorized Person
Date: June 1, 2015	RICHARD T. MCGUIRE III
	By:	/s/ Richard T. McGuire III
Date: June 1, 2015	MARCATO, L.P.
	By:	MCM General Partner LLC, its General Partner
	By:	/s/ Richard T. McGuire III
		Richard T. McGuire III
		Authorized Person
Date: June 1, 2015	MARCATO II, L.P.
	By:	MCM General Partner LLC, its General Partner
	By:	/s/ Richard T. McGuire III
		Richard T. McGuire III
		Authorized Person
Date: June 1, 2015	MARCATO INTERNATIONAL MASTER FUND, LTD.
	By:	/s/ Richard T. McGuire III
		Richard T. McGuire III
		Director

EX-99.2

EXHIBIT 2

TRANSACTIONS

Except as set forth in previous amendments to this Schedule 13D, the following table sets forth all transactions with respect to Shares effected in the last sixty days by the Reporting Persons or on behalf of the Reporting Persons in respect of the Shares, inclusive of any transactions effected through 4:00 p.m., New York City time, on May 29, 2015. All such transactions were purchases or sales of Shares effected in the open market, and the table includes commissions paid in per share prices.

Fund

Trade Date

Buy/Sell(1)

Shares

Unit Cost

Security

Marcato II, L.P.

05/01/2015

Sell

*

(2,251

)

42.71

Common Stock

Marcato, L.P.

05/01/2015

Buy

*

3,076

42.71

Common Stock

Marcato International Master Fund, Ltd.

05/01/2015

Sell

*

(825

)

42.71

Common Stock

(1) All transactions noted by an * are rebalancing transactions.

EX-99.8

Exhibit 8

IN THE COURT OF CHANCERY OF THE STATE OF DELAWARE

THIRD POINT LLC, a Delaware limited	)
liability company,	)
	)
Plaintiff,	)
	)
v.	)
	)
WILLIAM F. RUPRECHT,	)	C.A. No. 9469-VCP
PEREGRINE A. M. CAVENDISH,	)
DOMENICO DE SOLE, JOHN M.	)
ANGELO, STEVEN B. DODGE,	)
DANIEL H. MEYER, ALLEN I.	)
QUESTROM, MARSHA E. SIMMS,	)
MICHAEL I. SOVERN, ROBERT S.	)
TAUBMAN, DIANA L. TAYLOR and	)
DENNIS M. WEIBLING,	)
	)
Defendants,	)
	)
and	)
	)
SOTHEBY’S, a Delaware corporation,	)
	)
Nominal Defendant.	)

NOTICE OF CHALLENGE TO CONFIDENTIAL TREATMENT

Pursuant to Court of Chancery Rule 5.1(f), non-party Marcato Capital Management, LP (“Marcato”), by and through its undersigned attorneys, hereby provides notice of its challenge to the confidential treatment of the following documents filed under seal with the Court of Chancery in the captioned action:

1. Exhibits 1 through 27 to Transmittal Affidavit of Matthew R. Clark in Support of Plaintiff Third Point LLC’s Opening Brief in Support of Its Motion for Preliminary Injunction, filed on April 22, 2014, Transaction ID 55337258.

2. Exhibits 29 through 58 to Transmittal Affidavit of Matthew R. Clark in Support of Plaintiff Third Point LLC’s Opening Brief in Support of Its Motion for Preliminary Injunction, filed on April 22, 2014, Transaction ID 55337258.

3. Exhibits 69 to 73 to Transmittal Affidavit of Matthew R. Clark in Support of Plaintiff Third Point LLC’s Opening Brief in Support of Its Motion for Preliminary Injunction, filed on April 22, 2014, Transaction ID 55337258.

4. Deposition of Stoker Cavendish, filed on April 22, 2014, Transaction ID 55337963.

5. Deposition of Domenico De Sole (Vol. 1), filed on April 22, 2014, Transaction ID 55337963.

6. Deposition of Domenico De Sole (Vol. 2), filed on April 22, 2014, Transaction ID 55337963.

7. Deposition of Steven Dodge, filed on April 22, 2014, Transaction ID 55337963.

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8. Deposition of Daniel Loeb, filed on April 22, 2014, Transaction ID 55337963.

9. Deposition of Patrick McClymont, filed on April 22, 2014, Transaction ID 55337963.

10. Deposition of Daniel Meyer, filed on April 22, 2014, Transaction ID 55337963.

11. Deposition of William Ruprecht, filed on April 22, 2014, Transaction ID 55337963.

12. Deposition of Robert Taubman, filed on April 22, 2014, Transaction ID 55337963.

13. Deposition of Diana Taylor, filed on April 22, 2014, Transaction ID 55337963.

14. Transmittal Affidavit of Ryan T. Costa, Esquire in Support of Defendants’ Answering Brief in Opposition to Plaintiffs’ Motions for Preliminary Injunction, filed on April 26, 2014, Transmittal ID 55356900.

15. Exhibits 43 through 60 to the Transmittal Affidavit of Ryan T. Costa, Esquire in Support of Defendants’ Answering Brief in Opposition to Plaintiffs’ Motions for Preliminary Injunction, filed on April 26, 2014, Transmittal ID 55356903.

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16. Exhibits 62 and 63 Transmittal Affidavit of Ryan T. Costa, Esquire in Support of Defendants’ Answering Brief in Opposition to Plaintiffs’ Motions for Preliminary Injunction, filed on April 26, 2014, Transmittal ID 55356903.

17. Exhibits 74 through 77 Transmittal Affidavit of Ryan T. Costa, Esquire in Support of Defendants’ Answering Brief in Opposition to Plaintiffs’ Motions for Preliminary Injunction, filed on April 26, 2014, Transmittal ID 55356903.

This action involved a dispute between a large shareholder of Sotheby’s and members of its Board of Directors. The resolution of this dispute was announced on May 5, 2014, but completely unredacted versions of certain filings remain unavailable to the public. Marcato believes that the redacted information, given the context, does not appear to be the type of proprietary information that this Court has determined warrants protection under Rule 5.1 and, in any event, sufficient time has passed since this action has concluded to warrant unsealing. Therefore, maintaining the confidentiality of these documents can no longer be justified.

4

Of Counsel: AKIN GUMP STRAUSS HAUER & FELD LLP Douglas A. Rappaport One Bryant Park Bank of America Tower New York, New York 10036-6745 Telephone: (212) 872-7412	ASHBY & GEDDES /s/ Catherine A. Gaul (#4310)
	Catherine A. Gaul (#4310) 500 Delaware Avenue, 8th Floor P.O. Box 1150 Wilmington, Delaware 19899 (302) 654-1888 Attorneys for Marcato Capital Management, LP

Dated: May 29, 2015

5

CERTIFICATE OF SERVICE

I hereby certify that, on May 29, 2015, a copy of the Notice of Challenge to Confidential Treatment was caused to be served upon the following counsel of record by File & ServeXpress.

Donald J. Wolfe, Jr. Kevin R. Shannon Berton W. Ashman, Jr. Matthew F. Davis Potter Anderson & Corroon LLP 1313 N. Market Street Hercules Plaza, 6th Floor Wilmington, DE 19801	Samuel T. Hirzel Proctor Heyman LLP 300 Delaware Avenue Suite 200 Wilmington, DE 19801
Kevin G. Abrams John M. Seaman Daniel A. Gordon Abrams & Bayliss LLP 20 Montchanin Road, Suite 200 Wilmington, DE 19807	Stuart M. Grant Cynthia A. Calder John C. Karis Bernard C. Devieux Grant & Eisenhofer, P.O. 123 S. Justison Street Wilmington, DE 19801
William M. Lafferty Morris Nichols Arsht & Tunnell LLP 1201 North Market Street Wilmington, DE 19801

/s/ Catherine A. Gaul (#4310)

Catherine A. Gaul (#4310)