Under the Securities Exchange Act of 1934
(Amendment No. 6)*

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

Laurie Smiley, Esq.

Arian Colachis, Esq.

Cascade Investment, L.L.C.

2365 Carillon Point

Kirkland, WA 98033

(425) 889-7900

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

(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. o

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 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).

(1)             All Common Shares held by Cascade Investment, L.L.C. (“Cascade”) may be deemed to be beneficially owned by William H. Gates III as the sole member of Cascade. 

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(1)             All Common Shares held by Cascade Investment, L.L.C. (“Cascade”) may be deemed to be beneficially owned by William H. Gates III as the sole member of Cascade.

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EXPLANATORY NOTE

This Amendment No. 6 to Schedule 13D (“Amendment No. 6”) relates to the common shares of beneficial interest, no par value (“Common Shares”) of Western Asset/Claymore Inflation-Linked Opportunities & Income Fund (the “Issuer”).  This Amendment No. 6 is being jointly filed by Cascade Investment, L.L.C. (“Cascade”) and William H. Gates III (collectively, “Reporting Persons”) to amend and supplement the Items set forth below on the Schedule 13D previously filed with the Securities and Exchange Commission on January 9, 2006, as amended on May 3, 2006, September 29, 2008, April 22, 2009, May 1, 2009 and July 14, 2011.

Item 3.    Source and Amount of Funds or Other Consideration

During the period July 14, 2011 through August 8, 2011, Cascade purchased 658,970 Common Shares of the Issuer with its working capital for an aggregate purchase price of $8,285,959.23.  Cascade also acquired 17,379 Common Shares pursuant to a dividend reinvestment plan of the Issuer.  Other than the reinvestment of such dividend, Cascade paid no consideration to acquire these shares.

Item 5.    Interest in Securities of the Issuer

(a)  See items 11 and 13 of the cover pages to this Schedule 13D for the aggregate number of Common Shares and percentage of Common Shares beneficially owned by each of the Reporting Persons. 

(b)  See items 7 through 10 of the cover pages to this Schedule 13D for the number of Common Shares beneficially owned by each of the Reporting Persons as to which there is sole power to vote or to direct the vote, shared power to vote or to direct the vote and sole or shared power to dispose or to direct the disposition.

(c)  During the period July 14, 2011 through August 8, 2011, Cascade purchased 658,970 Common Shares for cash in open market transactions and acquired 17,379 Common Shares pursuant to a dividend reinvestment plan of the Issuer in each case on the dates and at the price per share set forth on Exhibit 99.1, which is attached hereto and incorporated herein by reference.  

(d)  None.

(e) Not applicable.

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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.

(1) This Amendment No. 6 is being filed jointly by the Reporting Persons pursuant to the Joint Filing Agreement dated January 9, 2006 and included with the signature page to the Reporting Persons’ Schedule 13D with respect to the Issuer filed on January 9, 2006, SEC File No. 005-81261, and incorporated by reference herein.

(2) Duly authorized under Special Limited Power of Attorney appointing Alan Heuberger attorney-in-fact, dated August 12, 2008, by and on behalf of Michael Larson, filed as Exhibit 99.1 to Amendment No. 1 to Cascade’s Schedule 13D with respect to Otter Tail Corporation on April 15, 2009, SEC File No. 005-06638 and incorporated by reference herein.

(3) Duly authorized under Special Limited Power of Attorney appointing Alan Heuberger attorney-in-fact, dated August 12, 2008, by and on behalf of William H. Gates III, filed as Exhibit 99.2 to Amendment No. 1 to Cascade’s Schedule 13D with respect to Otter Tail Corporation on April 15, 2009, SEC File No. 005-06638 and incorporated by reference herein.

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