CLEVELAND-CLIFFS INC. — Major Shareholding Notification 2011

Aug 19, 2011

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13G/A

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO §240.13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO RULE §240.13d-2

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 6)

Polymet Mining Corp.

(Name of Issuer)

Common Shares, without par value

(Title of Class of Securities)

731916102

(CUSIP Number)

July 15, 2011

(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)

x Rule 13d-1(c)

¨ Rule 13d-1(d)

CUSIP No. 731916102 13G

1.	NAMES OF REPORTING PERSONS Cliffs Natural Resources Inc.
2.	CHECK THE APPROPRIATE BOX IF A
MEMBER OF A GROUP (a) ¨ (b) ¨
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF
ORGANIZATION Ohio
Number of Shares Beneficially Owned by Each Reporting Person With:	5.	SOLE VOTING POWER 0
	6.	SHARED VOTING POWER 0
	7.	SOLE DISPOSITIVE POWER 0
	8.	SHARED DISPOSITIVE POWER 0
9.	AGGREGATE AMOUNT BENEFICIALLY
OWNED BY EACH REPORTING PERSON 0
10.	CHECK IF THE AGGREGATE AMOUNT IN
ROW (9) EXCLUDES CERTAIN SHARES ¨
11.	PERCENT OF CLASS REPRESENTED BY
AMOUNT IN ROW 9 0
12.	TYPE OF REPORTING
PERSON CO

Item 1	(a).	Name of Issuer:
		Polymet Mining Corp.
Item 1	(b).	Address of Issuer’s Principal Executive Offices:
		390-3600 Lysander Lane, Richmond, British Columbia V7B 1C3
Item 2	(a).	Name of Person Filing:
		Cliffs Natural Resources Inc.
Item 2	(b).	Address of Principal Business Office, or, if None, Residence:
		200 Public Square, Ste. 3300, Cleveland, Ohio 44114-2315
Item 2	(c).	Citizenship:
		Ohio Corporation
Item 2	(d).	Title of Class of Securities:
		Common Shares, without par value
Item 2	(e).	CUSIP Number:
		731916102
Item 3.	If this statement is filed pursuant to §§240.13 d -1( b ), or 240.13d-2(b) or ( c ) , check whether the
person filing is a:
	(a)	¨	Broker or dealer registered under Section 15 of the Exchange Act;
	(b)	¨	Bank as defined in Section 3(a)(6) of the Exchange Act;
	(c)	¨	Insurance company as defined in Section 3(a)(19) of the Exchange Act;
	(d)	¨	Investment company registered under Section 8 of the Investment Company Act of 1940;
	(e)	¨	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
	(f)	¨	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
	(g)	¨	A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);
	(h)	¨	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;

(i)	¨	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act;
(j)	¨	A non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J);
(k)	¨	Group, in accordance with §240.13d-1(b)(1)(ii)(J).
If filing as a non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the type of
institution:

Item 4.	Ownership.
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in
Item 1.
	(a)	Amount beneficially owned:
		0
	(b)	Percent of class:
		0%
	(c)	Number of shares as to which the person has:
		(i)	Sole power to vote or direct the vote
			0
		(ii)	Shared power to vote or direct the vote
			0
		(iii)	Sole power to dispose or to direct the disposition of
			0
		(iv)	Shared power to dispose or to direct the disposition of
			0
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 five percent of the class of securities, check the following þ .
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 or Control
Person. |
| --- | --- |
| Cliffs Natural Resources Inc., through its wholly owned subsidiary Cliffs Erie, LLC, had beneficially owned all of the common shares that were previously reported in
this schedule. | |
| Item 8. | Identification and Classification of Members of the Group. |
| Not applicable | |
| Item 9. | Notice of Dissolution of Group. |
| Not applicable | |
| Item 10. | Certifications. |
| By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not
held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or
effect. | |

SIGNATURE

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

/s/ P. Kelly Tompkins
Name:	P. Kelly Tompkins
Title:	Executive Vice President, Legal, Government Affairs and Sustainability & Chief Legal Officer

Dated: August 19, 2011