TK Teekay Corporation

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

x

Rule 13d-1(b)

o

Rule 13d-1(c)

o

Rule 13d-1(d)

CUSIP No. Y8564W103

1

Names of Reporting Persons
MAGNETAR FINANCIAL LLC

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

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
5,838,732

7

Sole Dispositive Power
0

8

Shared Dispositive Power
5,838,732

9

Aggregate Amount Beneficially Owned by Each Reporting Person
5,838,732

10

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11

Percent of Class Represented by Amount in Row (9)
8.06%

12

Type of Reporting Person (See Instructions)
IA, OO

CUSIP No. Y8564W103

1

Names of Reporting Persons
MAGNETAR CAPITAL PARTNERS LP

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

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
5,838,732

7

Sole Dispositive Power
0

8

Shared Dispositive Power
5,838,732

9

Aggregate Amount Beneficially Owned by Each Reporting Person
5,838,732

10

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11

Percent of Class Represented by Amount in Row (9)
8.06%

12

Type of Reporting Person (See Instructions)
HC, PN

CUSIP No. Y8564W103

1

Names of Reporting Persons
SUPERNOVA MANAGEMENT LLC

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

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
5,838,732

7

Sole Dispositive Power
0

8

Shared Dispositive Power
5,838,732

9

Aggregate Amount Beneficially Owned by Each Reporting Person
5,838,732

10

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11

Percent of Class Represented by Amount in Row (9)
8.06%

12

Type of Reporting Person (See Instructions)
HC, OO

CUSIP No. Y8564W103

1

Names of Reporting Persons
ALEC N. LITOWITZ

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

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
5,838,732

7

Sole Dispositive Power
0

8

Shared Dispositive Power
5,838,732

9

Aggregate Amount Beneficially Owned by Each Reporting Person
5,838,732

10

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11

Percent of Class Represented by Amount in Row (9)
8.06%

12

Type of Reporting Person (See Instructions)
HC, IN

Item 1(a)

Name of Issuer.
Teekay Corporation (the “Issuer”)

Item 1(b)

Address of Issuer’s Principal Executive Offices.
4th Floor, Belvedere Building, 69 Pitts Bay Road, Hamilton, HM 08 Bermuda

Item 2(a)

Name of Person Filing.
This statement is filed on behalf of each of the following person (collectively, the “Reporting Persons”): 

i)

Magnetar Financial LLC (“Magnetar Financial”);

ii)

Magnetar Capital Partners LP (Magnetar Capital Partners”);

iii)

Supernova Management LLC (“Supernova Management”); and

iv)

Alec N. Litowitz (“Mr. Litowitz”).

This statement relates to Shares (as defined herein) held for accounts of certain managed accounts(the “Managed Accounts”), Magnetar Constellation Fund II, Ltd, a Cayman Islands exempted company, Magnetar Constellation Master Fund, Ltd, a Cayman Islands exempted company, MTP Energy Opportunities Fund LLC, a Delaware limited liability company, Hipparchus Master Fund Ltd, a Cayman Islands exempted company, Magnetar Capital Master Fund, Ltd, a Cayman Islands exempted company, Magnetar Global Event Driven Master Fund Ltd, a Cayman Islands exempted company, MTP Energy Fund Ltd., a Cayman Islands exempted company,  Magnetar Xing He Master Fund Ltd, a Cayman Islands exempted company, Magnetar SC Fund Ltd, a Cayman Islands exempted company and Spectrum Opportunities Master Fund Ltd, a Cayman Islands exempt company.  Magnetar Financial serves as the sole member of MTP Energy Management LLC (“MTP Energy”), a Delaware limited liability company and MTP Energy is a relying adviser of Magnetar Financial, and serves as the investment manager to MTP Energy Fund Ltd and managing member of MTP Energy Opportunities Fund LLC.  Magnetar Financial is a registered investment adviser under Section 203 of the Investment Advisers Act of 1940, as amended. Magnetar Financial serves as investment adviser to the Managed Accounts, Magnetar Constellation Fund II, Ltd, Magnetar Constellation Master Fund, Ltd, Hipparchus Master Fund Ltd, Magnetar Capital Master Fund, Ltd, Magnetar Global Event Driven Master Fund Ltd, Magnetar Xing He Master Fund Ltd, Magnetar SC Fund Ltd, and Spectrum Opportunities Master Fund Ltd.  In such capacity, MTP Energy exercises voting and investment power over the Shares held for the accounts of MTP Energy Fund Ltd and MTP Energy Opportunities Fund LLC; and Magnetar Financial exercises voting and investment power over the Shares held for the accounts of the Managed Accounts, Magnetar Constellation Fund II, Ltd, Magnetar Constellation Master Fund, Ltd, Hipparchus Master Fund Ltd, Magnetar Capital Master Fund, Ltd, Magnetar Global Event Driven Master Fund Ltd, Magnetar Xing He Master Fund Ltd, Magnetar SC Fund Ltd, and Spectrum Opportunities Master Fund Ltd.  Magnetar Capital Partners serves as the sole member and parent holding company of Magnetar Financial. Supernova Management is the general partner of Magnetar Capital Partners. The manager of Supernova Management is Mr. Litowitz.

Item 2(b)

Address of Principal Business Office.
The address of the principal business office of each of Magnetar Financial, Magnetar Capital Partners, Supernova Management, and Mr. Litowitz is 1603 Orrington Avenue, 13th Floor, Evanston, Illinois 60201.

Item 2(c)

Place of Organization.

i)

Magnetar Financial is Delaware limited liability company;

ii)

Magnetar Capital Partners is a Delaware limited partnership;

iii)

Supernova Management is a Delaware limited liability company; and

iv)

Mr. Litowitz is a citizen of the United States of America.

Item 2(d)

Title of Class of Securities.
Common Stock, $0.001 par value per share (the “Shares”)

Item 2(e)

CUSIP Number.
Y8564W103

Item 3

Reporting Person.

(e) x An investment adviser in accordance with §240.13d–1(b)(1)(ii)(E)

(g) x A parent holding company or control person in accordance with §240.13d–1(b)(1)(ii)(G)

Item 4

Ownership.

Item 4(a)

Amount beneficially owned:   

As of December 31, 2014, each of Magnetar Financial, Magnetar Capital Partners, Supernova Management, and Mr. Litowitz held 5,838,732 Shares.  The amount consists of (A) 418,028 Shares held for the Managed Accounts; (B) 33,250 Shares held for the account of Magnetar Constellation Fund II, Ltd; (C) 80,500 Shares held for the account of Magnetar Constellation Master Fund, Ltd; (D) 625,000 Share held for the account of MTP Energy Opportunities Fund LLC; (E) 379,176 Shares held for the account of Hipparchus Master Fund Ltd; (F) 655,521 Shares held for the account of Magnetar Capital Master Fund, Ltd; (G) 592,135 Shares held for the account of Magnetar Global Event Driven Master Fund Ltd; (H) 2,493,884 Shares held for the account of MTP Energy Fund Ltd.; (I) 22,750 Shares held for the account of Magnetar Xing He Master Fund; (J) 38,500 Shares held for the account of Magnetar SC Fund Ltd; and (K) 499,988 Shares held for the account of Spectrum Opportunities Master Fund Ltd. which represents approximately 8.06% (calculated pursuant to Rule 13d-3(d)(1)(i)) of the outstanding Shares of the Issuer.

Item 4(b)

Percent of class:   

As of December 31, 2014, each of Magnetar Financial, Magnetar Capital Partners, Supernova Management and Mr. Litowitz were deemed to be the beneficial owner constituting approximately 8.06% of the total number of Shares outstanding (based upon the information provided by the Issuer in its most recently filed registration statement on Form 6-K, there were approximately 72,456,238 shares outstanding as of September 30, 2014).

Item 4(c)

Number of shares of which such person has:

Magnetar Financial, Magnetar Capital Partners, Supernova Management, and Mr. Litowitz:

(i)

Sole power to vote or to direct the vote:

0

(ii)

Shared power to vote or to direct the vote :

5,838,732

(iii)

Sole power to dispose or to direct the disposition of:

0

(iv)

Shared power to dispose or to direct the disposition of:

5,838,732

Item 5

Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following   o.

Item 6

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

This Item 6 is not applicable.

Item 7

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

This Item 7 is not applicable.

Item 8

Identification and Classification of Members of the Group.

This Item 8 is not applicable.

Item 9

Notice of Dissolution of Group.

This Item 9 is not applicable.

Date: February 17, 2015

MAGNETAR FINANCIAL LLC

By: Magnetar Capital Partners LP, its Sole Member

By:

/s/ Alec N. Litowitz

Name:

Alec N. Litowitz

Title:

Manager of Supernova Management LLC,

the General Partner of Magnetar Capital Partners LP

Date: February 17, 2015

MAGNETAR CAPITAL PARTNERS LP

By: Supernova Management LLC, its General Partner

By:

/s/ Alec N. Litowitz

Name:

Alec N. Litowitz

Title:

Manager of Supernova Management LLC

Date: February 17, 2015

SUPERNOVA MANAGEMENT LLC

By:

/s/ Alec N. Litowitz

Name: Alec N. Litowitz

Title: Manager

Date: February 17, 2015

/s/ Alec N. Litowitz

Alec N. Litowitz