BlueMountain Capital Trims Stake in Overseas Shipholding Group Inc (OSG)

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Andrew Feldstein and Stephen Siderow‘s BlueMountain Capital has filed a 13D with the US Securities and Exchange Commission, reporting its stake in Overseas Shipholding Group, Inc. (NYSEMKT:OSG). BlueMountain disclosed holding 62.42 million class A shares of Overseas Shipholding Group, which represent 17.1% of the stock. The filing added that BlueMountain sold 32,200 shares of Overseas Shipholding Group on March 11 at an average price of $2.20 apiece.

You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
BlueMountain Capital Management 0 62,421,008 0 62,421,008 62,421,008 17.1%
BlueMountain GP Holdings 0 62,421,008 0 62,421,008 62,421,008 17.1%
BlueMountain Nautical 0 62,421,008 0 62,421,008 62,421,008 17.1%
BlueMountain Guadalupe Peak Fund 0 62,421,008 0 62,421,008 62,421,008 17.1%
BlueMountain Long Short Credit GP 0 62,421,008 0 62,421,008 62,421,008 17.1%

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SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13D

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)*

OVERSEAS
SHIPHOLDING GROUP, INC.

(Name of Issuer)

Class A Common Stock, par value $0.01 per share

(Title of Class of Securities)

69036R 103

(CUSIP
Number)

Eric M. Albert

BlueMountain Capital Management, LLC

280 Park Avenue, 12th Floor

New York, New York 10017

212-905-5647

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

March 11, 2016

(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 §
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 persons 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).

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