##### Table of Contents

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q



|x | Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the quarterly period ended March 31, 2007.
|- | --------------------------------------------------------------------------------------------------------------------------------------



| ̈ | Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from
 to
.
|- | -----------------------------------------------------------------------------------------------------------------------------



|                         |  |                          
|------------------------ |  | -------------------------
|Commission file numbers: |  | 001-32947 (Registrant)   
|                         |  | 001-32948 (Co-Registrant)

iShares® S&P GSCI Commodity-Indexed Trust

iShares® S&P GSCI Commodity-Indexed Investing Pool LLC

(Rule 140 Co-Registrant)

(Exact
name of registrant as specified in its charter)



|                                                              |  |                                                  
|------------------------------------------------------------- |  | -------------------------------------------------
|Delaware                                                      |  | 51-6573369 (Registrant)34-2061331 (Co-Registrant)
|(State or other jurisdiction ofincorporation or organization) |  | (I.R.S. EmployerIdentification Numbers.)         

c/o Barclays Global Investors International, Inc.

45 Fremont Street

San Francisco,
California 94105

Attn: BGIs Product Management Team

Intermediary Investor and Exchange-Traded Products Department

(Address of
principal executive offices)

(415) 597-2000

(Registrant and Co-Registrants telephone number, including area code)

iShares® GSCI® Commodity-Indexed Trust

iShares® GSCI®
Commodity-Indexed Investing Pool LLC

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the Registrant and Co-Registrant (1) have filed all reports required to be filed by Section 13 or 15(d) of
the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) have been subject to such filing requirements for the past 90 days.

Yes  x    No ̈

Indicate by check mark whether the Registrant and Co-Registrant are large accelerated
filers, accelerated filers, or non-accelerated filers. See definition of accelerated filer and large accelerated filer in Rule 12b-2 of the Exchange Act. (Check one.)

Large accelerated filers ̈Accelerated
filers ̈Non-accelerated filers  x

Indicate by check mark whether the Registrant and Co-Registrant are shell companies (as defined in Rule 12b-2 of the Exchange Act).

Yes ̈No  x



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##### Table of Contents

|                               |  |                                                                                                     |  |     
|------------------------------ |  | --------------------------------------------------------------------------------------------------- |  | ----
|                               |  |                                                                                                     |  | Page
|PART I  FINANCIAL INFORMATION |  |                                                                                                    
|                               |  |                                                                                                    
|Item 1.                        |  | Financial Statements                                                                                |  | 1   
|                               |  |                                                                                                    
|                               |  | iShares® S&P GSCI Commodity-Indexed Trust                                                          |  |     
|                               |  |                                                                                                    
|                               |  | Statements of Financial Condition at March 31, 2007 (Unaudited) and December 31, 2006               |  | 1   
|                               |  |                                                                                                    
|                               |  | Statement of Operations (Unaudited) for the three months ended March 31, 2007                       |  | 2   
|                               |  |                                                                                                    
|                               |  | Statement of Changes in Shareholders Capital (Unaudited) for the three months ended March 31, 2007 |  | 3   
|                               |  |                                                                                                    
|                               |  | Statement of Cash Flows (Unaudited) for the three months ended March 31, 2007                       |  | 4   
|                               |  |                                                                                                    
|                               |  | Notes to Financial Statements (Unaudited)                                                           |  | 5   
|                               |  |                                                                                                    
|                               |  | iShares® S&P GSCI Commodity-Indexed Investing Pool LLC                                             |  |     
|                               |  |                                                                                                    
|                               |  | Statements of Financial Condition at March 31, 2007 (Unaudited) and December 31, 2006               |  | 8   
|                               |  |                                                                                                    
|                               |  | Statement of Operations (Unaudited) for the three months ended March 31, 2007                       |  | 9   
|                               |  |                                                                                                    
|                               |  | Statement of Changes in Members Equity (Unaudited) for the three months ended March 31, 2007       |  | 10  
|                               |  |                                                                                                    
|                               |  | Statement of Cash Flows (Unaudited) for the three months ended March 31, 2007                       |  | 11  
|                               |  |                                                                                                    
|                               |  | Schedule of Investments (Unaudited) as of March 31, 2007                                            |  | 12  
|                               |  |                                                                                                    
|                               |  | Notes to Financial Statements (Unaudited)                                                           |  | 13  



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##### Table of Contents

|                            |  |                                                                                                |  |   
|--------------------------- |  | ---------------------------------------------------------------------------------------------- |  | --
|                            |  |                                                                                               
|Item 2.                     |  | Managements Discussion and Analysis of Financial Condition and Results of Operations          |  | 16
|                            |  |                                                                                               
|Item 3.                     |  | Quantitative and Qualitative Disclosures About Market Risk                                     |  | 18
|                            |  |                                                                                               
|Item 4.                     |  | Controls and Procedures                                                                        |  | 19
|                            | 
|PART II  OTHER INFORMATION |  |                                                                                               
|                            |  |                                                                                               
|Item 1.                     |  | Legal Proceedings                                                                              |  | 19
|                            |  |                                                                                               
|Item 1A.                    |  | Risk Factors                                                                                   |  | 19
|                            |  |                                                                                               
|Item 2.                     |  | Unregistered Sales of Equity Securities and Use of Proceeds                                    |  | 19
|                            |  |                                                                                               
|Item 3.                     |  | Defaults Upon Senior Securities                                                                |  | 20
|                            |  |                                                                                               
|Item 4.                     |  | Submission of Matters to a Vote of Security Holders                                            |  | 20
|                            |  |                                                                                               
|Item 5.                     |  | Other Information                                                                              |  | 20
|                            |  |                                                                                               
|Item 6.                     |  | Exhibits                                                                                       |  | 21
|                            | 
|SIGNATURES                  |  | 22                                                                                            
|                            | 
|EXHIBIT INDEX               |  |                                                                                               
|                            |  |                                                                                               
|Exhibit 31.1:               |  | Certification of Lee T. Kranefuss for iShares® S&P GSCI Commodity-Indexed Trust               |  |   
|                            |  |                                                                                               
|Exhibit 31.2:               |  | Certification of Michael A. Latham for iShares® S&P GSCI Commodity-Indexed Trust              |  |   
|                            |  |                                                                                               
|Exhibit 31.3:               |  | Certification of Lee T. Kranefuss for iShares® S&P GSCI Commodity-Indexed Investing Pool LLC  |  |   
|                            |  |                                                                                               
|Exhibit 31.4:               |  | Certification of Michael A. Latham for iShares® S&P GSCI Commodity-Indexed Investing Pool LLC |  |   
|                            |  |                                                                                               
|Exhibit 32.1:               |  | Certification of Lee T. Kranefuss                                                              |  |   
|                            |  |                                                                                               
|Exhibit 32.2:               |  | Certification of Michael A. Latham                                                             |  |   



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##### Table of Contents

Part I  Financial Information



|Item 1. | Financial Statements
|------- | --------------------

iShares® S&P GSCI Commodity-Indexed Trust

Statements of Financial Condition

March 31, 2007 (Unaudited) and

December 31, 2006



|                                                                                                                                                                                                          |  |                           |             |                  |   |            
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------- | ----------- | ---------------- | - | -----------
|                                                                                                                                                                                                          |  | March 31, 2007(Unaudited) |             | December 31,2006
|ASSETS                                                                                                                                                                                                    |  |                           |             |                  |   |            
|Current Assets                                                                                                                                                                                            |  |                           |             |                  |   |            
|Investment in iShares® S&P GSCI Commodity-Indexed                                                                                                                                                        |  |                           |             |                  |   |            
|Investing Pool LLC, at equity method                                                                                                                                                                      |  | $                         | 182,023,875 |                  | $ | 143,425,669
|                                                                                                                                                                                                          |  |                           |             |                  |   |            
|Total Assets                                                                                                                                                                                              |  | $                         | 182,023,875 |                  | $ | 143,425,669
|                                                                                                                                                                                                          |  |                           |             |                  |   |            
|LIABILITIES AND SHAREHOLDERS CAPITAL                                                                                                                                                                     |  |                           |             |                  |   |            
|Commitments and Contingent liabilities (Notes 6 and 7)                                                                                                                                                    |  | $                         |            |                  | $ |           
|Redeemable capital shares, no par value, unlimited amount authorized  4,350,000 issued and outstanding on March 31, 2007 and
3,600,000 issued and outstanding on December 31, 2006 (at redemption value) |  |                           | 182,023,875 |                  |   | 143,425,669
|Total Shareholders Capital                                                                                                                                                                               |  |                           | 182,023,875 |                  |   | 143,425,669
|                                                                                                                                                                                                          |  |                           |             |                  |   |            
|TOTAL LIABILITIES AND SHAREHOLDERS CAPITAL                                                                                                                                                               |  | $                         | 182,023,875 |                  | $ | 143,425,669
|                                                                                                                                                                                                          |  |                           |             |                  |   |            

See notes to financial statements.



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##### Table of Contents

iShares® S&P GSCI Commodity-Indexed Trust

Statement of Operations

For the three
months ended March 31, 2007 (Unaudited)



|                                                                                                            |  |   |            |  
|----------------------------------------------------------------------------------------------------------- |  | - | ---------- | -
|Investment Income Allocated From iShares® S&P GSCI Commodity-Indexed Investing Pool LLC                    |  |   |            |  
|Interest                                                                                                    |  | $ | 2,025,586  |  
|                                                                                                            |  |   |            |  
|Total investment income                                                                                     |  |   | 2,025,586  |  
|                                                                                                            |  |   |            |  
|Expenses Allocated From iShares® S&P GSCI Commodity-Indexed Investing Pool LLC                             |  |   |            |  
|Management fee                                                                                              |  |   | 298,275    |  
|Brokerage commissions                                                                                       |  |   | 144        |  
|                                                                                                            |  |   |            |  
|Total expenses                                                                                              |  |   | 298,419    |  
|                                                                                                            |  |   |            |  
|Net investment income                                                                                       |  |   | 1,727,167  |  
|                                                                                                            |  |   |            |  
|Realized and Unrealized Gain (Loss) Allocated From iShares® S&P GSCI Commodity- Indexed Investing Pool LLC |  |   |            |  
|Net realized loss on short term investments                                                                 |  |   | (119       | )
|Net realized loss on futures contracts                                                                      |  |   | (1,478,611 | )
|Net decrease in unrealized loss on futures contracts                                                        |  |   | 10,913,261 |  
|                                                                                                            |  |   |            |  
|Net realized and unrealized gain                                                                            |  |   | 9,434,531  |  
|                                                                                                            |  |   |            |  
|Net gain                                                                                                    |  | $ | 11,161,698 |  
|                                                                                                            |  |   |            |  
|Net gain per share                                                                                          |  | $ | 2.69       |  
|                                                                                                            |  |   |            |  
|Weighted average shares outstanding                                                                         |  |   | 4,152,747  |  
|                                                                                                            |  |   |            |  

See notes to financial statements.



2



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iShares® S&P GSCI Commodity-Indexed Trust

Statement of Changes in Shareholders Capital

For the three months ended March 31, 2007 (Unaudited)



|                                                     |  |   |             |  
|---------------------------------------------------- |  | - | ----------- | -
|Shareholders capital, beginning of period           |  | $ | 143,425,669 |  
|Contributions                                        |  |   | 39,645,265  |  
|Redemptions                                          |  |   | (12,208,757 | )
|Net investment income                                |  |   | 1,727,167   |  
|Net realized loss on short term investments          |  |   | (119        | )
|Net realized loss on futures contracts               |  |   | (1,478,611  | )
|Net decrease in unrealized loss on futures contracts |  |   | 10,913,261  |  
|                                                     |  |   |             |  
|Shareholders capital, end of period                 |  | $ | 182,023,875 |  
|                                                     |  |   |             |  
|Net asset value per share, end of period             |  | $ | 41.84       |  
|                                                     |  |   |             |  

See notes to financial statements.



3



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iShares® S&P GSCI Commodity-Indexed Trust

Statement of Cash Flows

For the three
months ended March 31, 2007 (Unaudited)



|                                                                                  |  |   |             |  
|--------------------------------------------------------------------------------- |  | - | ----------- | -
|Cash flows from operating activities                                              |  |   |             |  
|Net gain                                                                          |  | $ | 11,161,698  |  
|Adjustments to reconcile net gain to net cash used in operating activities:       |  |   |             |  
|Increase in investment in iShares® S&P GSCI Commodity-Indexed Investing Pool LLC |  |   | (38,598,206 | )
|                                                                                  |  |   |             |  
|Net cash used in operating activities                                             |  |   | (27,436,508 | )
|                                                                                  |  |   |             |  
|Cash flows from financing activities                                              |  |   |             |  
|Contributions                                                                     |  |   | 39,645,265  |  
|Redemptions                                                                       |  |   | (12,208,757 | )
|                                                                                  |  |   |             |  
|Net cash provided by financing activities                                         |  |   | 27,436,508  |  
|                                                                                  |  |   |             |  
|Net increase in cash and cash equivalents                                         |  |   |            |  
|                                                                                  |  |   |             |  
|Cash and cash equivalents                                                         |  |   |             |  
|Beginning of period                                                               |  |   |            |  
|                                                                                  |  |   |             |  
|End of period                                                                     |  | $ |            |  
|                                                                                  |  |   |             |  

See notes to financial statements.



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iSHARES® S&P GSCI COMMODITY-INDEXED TRUST

NOTES TO FINANCIAL STATEMENTS (UNAUDITED)

March 31, 2007



|1. | ORGANIZATION
|-- | ------------

The iShares® S&P GSCI Commodity-Indexed Trust, or the Trust, was organized as a Delaware statutory trust on July 7, 2006 and
commenced operations on July 10, 2006. Prior to May 9, 2007, the Trust was known as the iShares® GSCI® Commodity-Indexed Trust. Barclays Global Investors International, Inc. is the Sponsor of the Trust and Barclays Global Investors, N.A. is the Trustee of the Trust. The Trust is governed by the
Trust Agreement among the Sponsor, the Trustee and Wilmington Trust Company, the Delaware trustee. The Trust issues units of beneficial interest, or Shares, representing fractional undivided beneficial interests in its net assets.
Substantially all of the net assets of the Trust consist of its holdings of the limited liability company interests of a commodity pool, which are the only securities in which the Trust may invest. That commodity pool, iShares® S&P GSCI Commodity-Indexed Investing Pool LLC, or the Investing Pool, holds long
positions in futures contracts on the S&P GSCI Excess Return Index listed on the Chicago Mercantile Exchange called CERFs and posts margin in the form of cash or short-term or similar securities to collateralize its CERF positions. Margin has to be
posted at the time the CERF position is established.

It is the objective of the Trust that the performance of the Shares will correspond generally to the
performance of the S&P GSCI Total Return
Index before payment of the Trust and the Investing Pools expenses.

The Trust and the Investing Pool are each commodity pools, as defined in the
Commodity Exchange Act and the applicable regulations of the Commodity Futures Trading Commissions, or CFTC, managed by Barclays Global Investors International, Inc., a commodity pool operator registered with the CFTC. Barclays Global
Investors International, Inc. is an indirect subsidiary of Barclays Bank PLC.

The accompanying unaudited financial statements were prepared in accordance
with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and with the instructions for Form 10-Q and the rules and regulations of the U.S. Securities and Exchange
Commission (the SEC). In the opinion of management, all material adjustments, consisting only of normal recurring adjustments, considered necessary for a fair statement of the interim period financial statements have been made. Interim
period results are not necessarily indicative of results for a full-year period. These financial statements and the notes thereto should be read in conjunction with the Trusts financial statements included in its Annual Report on Form 10-K for
the year ended December 31, 2006 as filed with the SEC on March 30, 2007.

Neither the Trust nor the Investing Pool is an investment company registered
under the Investment Company Act of 1940, as amended.



|2. | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
|-- | ------------------------------------------



|A. | Basis of Accounting
|-- | -------------------

The accompanying financial statements have
been prepared in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures
of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.



|B. | Investment in the Investing Pool
|-- | --------------------------------

The Trusts investment in
the Investing Pool is valued at an amount equal to the value of the Trusts capital account in the Investing Pool, which approximates fair value.

The
financial statements of the Investing Pool are included elsewhere in this report and should be read in conjunction with the Trust's financial statements.

At March 31, 2007, the Trust owned 99.99% of the Investing Pools net assets. Because the Trust invests substantially all of its assets in the Investing Pool, the accounting policies of the Investing Pool, including the Investing
Pools security valuation policies, will directly affect the recorded value of the Trusts investment in the Investing Pool. The Trust also receives a daily allocation of its respective income, expenses and net realized and unrealized
gains and losses in proportion to its investment in the Investing Pool.



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|C. | Income Taxes
|-- | ------------

The Trust is an association not taxable as a
corporation for Federal, state and local income tax purposes.

On February 5, 2007, the Internal Revenue Service (the IRS) issued internal
legal guidance on a structure similar to that of the Trust and the Investing Pool. The guidance concluded that the structure was a partnership for U.S. Federal income tax purposes. As a result of this guidance it may be more likely that the IRS will
seek to treat the Trust as a partnership.

We are currently evaluating how to interpret the IRS guidance. Accordingly, the Trust may file a partnership
return for the year ended December 31, 2007. If the Trust files a partnership return it would not change fundamentally the tax treatment of your investment in the Trust. Rather, it would change only the form of the tax reporting that you receive
from the Trust.

No provision for Federal, state, and local income taxes has been made in the accompanying financial statements because the Trust is not
subject to income taxes. Shareholders are individually responsible for their own tax payments on their proportionate share of gains, losses, credits, or deductions.



|D. | Calculation of Net Asset Value
|-- | ------------------------------

The net asset value of the Trust on
any given day is obtained by subtracting the Trusts accrued expenses and other liabilities on that day from the value of (1) the Trusts equity investment in the Investing Pool and (2) any other assets of the Trust, as of the
close of trading that day. The Trustee determines the net asset value per Share (the NAV) by dividing the net asset value of the Trust on a given day by the number of Shares outstanding or deemed to be outstanding at the time the
calculation is made. The NAV is calculated on each day on which the New York Stock Exchange is open for regular trading, as soon as practicable after the close of regular trading of the Shares on the New York Stock Exchange (normally at 4:15 P.M.,
New York City time).



|E. | Distributions
|-- | -------------

Interest and distributions received by the Investing
Pool on the assets posted as margin may be used to acquire additional CERFs or, in the discretion of the Sponsor, distributed to Shareholders. The Sponsor is under no obligation to make periodic distributions to Shareholders.



|3. | OFFERING OF THE SHARES
|-- | ----------------------

Shares are issued and redeemed continuously in one
or more blocks of 50,000 Shares in exchange for a combination of CERFs and cash (or, in the discretion of the Sponsor, short-term or similar securities in lieu of cash). The baskets of CERFs and cash (or, in the discretion of the Sponsor, short-term
or similar securities in lieu of cash) are transferred to or from the Investing Pool in exchange for limited liability company interests in the Investing Pool. In addition, the Investing Pool, and some other types of market participants, are
required to deposit cash margin with their futures commission merchant with a value equal to 100% of the value of each CERF position at the time it is established. Individual investors cannot purchase or redeem shares in direct transactions with the
Trust. The Trust transacts only with registered broker-dealers that have entered into a contractual arrangement with the Trust and the Sponsor governing, among other matters, the creation and redemption processes (such authorized broker-dealers are
the Authorized Participants). Authorized Participants may redeem their Shares (as well as Shares on behalf of other investors) at any time on any business day in one or more blocks of 50,000 Shares. Redemptions of Shares in exchange for
baskets of CERFs and cash (or, in the discretion of the Sponsor, short-term or similar securities in lieu of cash) are treated as sales for financial statement purposes.

On March 31, 2007, the Trust had 4,350,000 shares outstanding.



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|4. | TRUST EXPENSE
|-- | -------------

The Trust is not expected to bear any ordinary recurring
expenses. The Sponsor has agreed to assume the following administrative, operational and marketing expenses: (1) the fees of the Trustee, Delaware trustee, Trust administrator and processing agent, (2) New York Stock Exchange listing fees,
(3) printing and mailing costs, (4) audit fees, (5) tax reporting costs, (6) license fees, and (7) up to $100,000 per annum in legal fees. The Sponsor has also paid the costs of the Trusts organization and the costs at
the initial issuance of the Shares, including applicable SEC registration fees.



|5. | RELATED PARTIES
|-- | ---------------

The Sponsor, the Manager and the Trustee are considered
to be related parties to the Trust. The Trustees fee is paid by the Sponsor and is not a separate expense of the Trust. The Manager is paid by the Investing Pool and that fee is an indirect expense of the Trust.



|6. | INDEMNIFICATION
|-- | ---------------

The Sponsor and its shareholders, directors, officers,
employees, affiliates (as such term is defined under the Securities Act of 1933, as amended) and subsidiaries shall be indemnified from the Trust and held harmless against any loss, liability or expense arising out of or in connection with the
performance of their obligations under the Trust Agreement or any actions taken in accordance with the provisions of the Trust Agreement and incurred without their (1) negligence, bad faith, willful misconduct or willful malfeasance or
(2) reckless disregard of their obligations and duties under the Trust Agreement.



|7. | COMMITMENTS AND CONTINGENT LIABILITIES
|-- | --------------------------------------

In the normal course of business,
the Trust may enter into contracts with service providers that contain general indemnification clauses. The Trusts maximum exposure under these arrangements is unknown as this would involve future claims that may be made against the Trust that
have not yet been made.



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##### Table of Contents

iShares® S&P GSCI Commodity-Indexed Investing Pool LLC

Statements of Financial Condition

March 31, 2007 (Unaudited) and

December 31, 2006



|                                                       |  |                           |             |                  |   |            
|------------------------------------------------------ |  | ------------------------- | ----------- | ---------------- | - | -----------
|                                                       |  | March 31, 2007(Unaudited) |             | December 31,2006
|ASSETS                                                 |  |                           |             |                  |   |            
|Current Assets                                         |  |                           |             |                  |   |            
|Cash and cash equivalents                              |  | $                         | 4,331,762   |                  | $ | 83,656     
|Short term investments, at amortized cost (Note 2D)    |  |                           | 176,777,144 |                  |   | 144,725,137
|Receivable for open futures contracts                  |  |                           | 1,044,050   |                  |   |           
|Interest receivable                                    |  |                           | 1,615       |                  |   | 358        
|                                                       |  |                           |             |                  |   |            
|Total Assets                                           |  | $                         | 182,154,571 |                  | $ | 144,809,151
|                                                       |  |                           |             |                  |   |            
|LIABILITIES AND MEMBERS EQUITY                        |  |                           |             |                  |   |            
|Current Liabilities                                    |  |                           |             |                  |   |            
|Management fee payable                                 |  | $                         | 109,373     |                  | $ | 91,255     
|Payable for open futures contracts                     |  |                           |            |                  |   | 1,271,926  
|                                                       |  |                           |             |                  |   |            
|Total Liabilities                                      |  |                           | 109,373     |                  |   | 1,363,181  
|                                                       |  |                           |             |                  |   |            
|Commitments and Contingent liabilities (Notes 6 and 7) |  |                           |            |                  |   |           
|Members Equity                                        |  |                           |             |                  |   |            
|General member                                         |  |                           | 21,323      |                  |   | 20,301     
|Limited members                                        |  |                           | 182,023,875 |                  |   | 143,425,669
|                                                       |  |                           |             |                  |   |            
|Total Members Equity                                  |  |                           | 182,045,198 |                  |   | 143,445,970
|                                                       |  |                           |             |                  |   |            
|TOTAL LIABILITIES AND MEMBERS EQUITY                  |  | $                         | 182,154,571 |                  | $ | 144,809,151
|                                                       |  |                           |             |                  |   |            

See notes to financial statements.



8



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iShares® S&P GSCICommodity-Indexed Investing Pool LLC

Statement of Operations

For the three months ended March 31, 2007 (Unaudited)



|                                                     |  |   |            |  
|---------------------------------------------------- |  | - | ---------- | -
|Investment Income                                    |  |   |            |  
|Interest                                             |  | $ | 2,025,835  |  
|                                                     |  |   |            |  
|Total investment income                              |  |   | 2,025,835  |  
|                                                     |  |   |            |  
|Expenses                                             |  |   |            |  
|Management fee                                       |  |   | 298,312    |  
|Brokerage commissions                                |  |   | 144        |  
|                                                     |  |   |            |  
|Total expenses                                       |  |   | 298,456    |  
|                                                     |  |   |            |  
|Net investment income                                |  |   | 1,727,379  |  
|                                                     |  |   |            |  
|Realized and Unrealized Gain (Loss)                  |  |   |            |  
|Net realized loss on short term investments          |  |   | (119       | )
|Net realized loss on futures contracts               |  |   | (1,478,790 | )
|Net decrease in unrealized loss on futures contracts |  |   | 10,914,250 |  
|                                                     |  |   |            |  
|Net realized and unrealized gain                     |  |   | 9,435,341  |  
|                                                     |  |   |            |  
|Net gain                                             |  | $ | 11,162,720 |  
|                                                     |  |   |            |  

See notes to financial statements.



9



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iShares® S&P
GSCI Commodity-Indexed Investing Pool LLC

Statement of Changes in Members Equity

For the three months ended March 31, 2007 (Unaudited)



|                                                     |  |               |        |   |               |   |             |                     |  |   |             |  
|---------------------------------------------------- |  | ------------- | ------ | - | ------------- | - | ----------- | ------------------- |  | - | ----------- | -
|                                                     |  | GeneralMember |        |   | LimitedMember |   |             | TotalMembersEquity | 
|Members equity, beginning of period                 |  | $             | 20,301 |   |               | $ | 143,425,669 |                     |  | $ | 143,445,970 |  
|Contributions                                        |  |               |       |   |               |   | 39,645,265  |                     |  |   | 39,645,265  |  
|Redemptions                                          |  |               |       |   |               |   | (12,208,757 | )                   |  |   | (12,208,757 | )
|Net investment income                                |  |               | 212    |   |               |   | 1,727,167   |                     |  |   | 1,727,379   |  
|Net realized loss on short term investments          |  |               |       |   |               |   | (119        | )                   |  |   | (119        | )
|Net realized loss on futures contracts               |  |               | (179   | ) |               |   | (1,478,611  | )                   |  |   | (1,478,790  | )
|Net decrease in unrealized loss on futures contracts |  |               | 989    |   |               |   | 10,913,261  |                     |  |   | 10,914,250  |  
|                                                     |  |               |        |   |               |   |             |                     |  |   |             |  
|Members equity, end of period                       |  | $             | 21,323 |   |               | $ | 182,023,875 |                     |  | $ | 182,045,198 |  
|                                                     |  |               |        |   |               |   |             |                     |  |   |             |  

See notes to financial statements.



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##### Table of Contents

iShares® S&P GSCICommodity-Indexed Investing Pool LLC

Statement of Cash Flows

For the three months Ended March 31, 2007 (Unaudited)



|                                                                            |  |   |              |  
|--------------------------------------------------------------------------- |  | - | ------------ | -
|Cash flows from operating activities                                        |  |   |              |  
|Net gain                                                                    |  | $ | 11,162,720   |  
|Adjustments to reconcile net gain to net cash used in operating activities: |  |   |              |  
|Purchases of short term investments                                         |  |   | (123,889,688 | )
|Sales of short term investments                                             |  |   | 93,839,263   |  
|Accretion of discount                                                       |  |   | (2,001,701   | )
|Net realized loss on short term investments                                 |  |   | 119          |  
|Increase (decrease) in operating assets and liabilities:                    |  |   |              |  
|Receivable for open futures contracts                                       |  |   | (1,044,050   | )
|Interest receivable                                                         |  |   | (1,257       | )
|Management fee payable                                                      |  |   | 18,118       |  
|Payable for open futures contracts                                          |  |   | (1,271,926   | )
|                                                                            |  |   |              |  
|Net cash used in operating activities                                       |  |   | (23,188,402  | )
|                                                                            |  |   |              |  
|Cash flows from financing activities                                        |  |   |              |  
|Contributions                                                               |  |   | 39,645,265   |  
|Redemptions                                                                 |  |   | (12,208,757  | )
|                                                                            |  |   |              |  
|Net cash provided by financing activities                                   |  |   | 27,436,508   |  
|                                                                            |  |   |              |  
|Net increase in cash and cash equivalents                                   |  |   | 4,248,106    |  
|                                                                            |  |   |              |  
|Cash and cash equivalents                                                   |  |   |              |  
|Beginning of period                                                         |  |   | 83,656       |  
|                                                                            |  |   |              |  
|End of period                                                               |  | $ | 4,331,762    |  
|                                                                            |  |   |              |  

See notes to financial statements.



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##### Table of Contents

iShares® S&P
GSCI Commodity-Indexed Investing Pool LLC

Schedule of Investments

March 31, 2007 (Unaudited)



|            |  |                                        |  |                |            
|----------- |  | -------------------------------------- |  | -------------- | -----------
|Face Amount |  | Security Description                   |  | Amortized Cost
|            |  | United States Treasury Bills - 97.11%* |  |                |            
|$20,500,000 |  | 4.92% - 4.95% due 4/12/07              |  | $              | 20,469,102 
|31,790,000  |  | 4.86% - 4.88% due 5/24/07              |  |                | 31,562,485 
|28,925,000  |  | 4.94% - 4.96% due 6/7/07               |  |                | 28,658,275 
|19,795,000  |  | 4.87% due 6/21/07                      |  |                | 19,578,319 
|33,417,000  |  | 4.95% due 8/2/07                       |  |                | 32,852,231 
|44,568,000  |  | 4.87% - 4.91% due 8/30/07              |  |                | 43,656,732 
|            |  |                                        |  |                |            
|            |  | Total United States Treasury Bills     |  | $              | 176,777,144
|            |  |                                        |  |                |            



|* | Percentage is based on members equity.
|- | ---------------------------------------

See notes
to financial statements.



12



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##### Table of Contents

iSHARES® S&P
GSCI COMMODITY-INDEXED INVESTING POOL LLC

NOTES TO FINANCIAL STATEMENTS (UNAUDITED)

March 31, 2007



|1. | ORGANIZATION
|-- | ------------

The iShares® S&P GSCI Commodity-Indexed Investing Pool LLC, or the "Investing Pool," is a
limited liability company organized under the laws of the State of Delaware on July 7, 2006 and commenced operations on July 10, 2006. Prior to May 9, 2007, the Investing Pool was known as the iShares® GSCI® Commodity-Indexed Investing Pool LLC. Barclays Global Investors International, Inc. (the Manager) is
responsible for the administration of the Investing Pool. The Investing Pool holds long positions in futures contracts on the S&P GSCI Excess Return Index, or "S&P GSCI-ER," listed on the Chicago Mercantile Exchange, or the "CME," called "CERFs" and posts margin in the form of cash
or short-term or similar securities to collateralize its CERF positions.

It is the objective of the Investing Pool that its performance will correspond
generally to the performance of the S&P GSCI
Total Return Index, or the "Index," before payment of the Investing Pool's expenses. The Investing Pool is a commodity pool, as defined in the Commodity Exchange Act and the applicable regulations of the Commodity Futures Trading Commissions, or
"CFTC," and is operated by the Manager, a commodity pool operator registered with the CFTC. The Manager is an indirect subsidiary of Barclays Bank PLC. Barclays Global Fund Advisors, an indirect subsidiary of Barclays Bank PLC, serves as the
commodity trading advisor of the Investing Pool and is registered with the CFTC.

The accompanying unaudited financial statements were prepared in
accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and with the instructions for Form 10-Q and the rules and regulations of the U.S. Securities and
Exchange Commission (the SEC). In the opinion of management, all material adjustments, consisting only of normal recurring adjustments, considered necessary for a fair statement of the interim period financial statements have been made.
Interim period results are not necessarily indicative of results for a full-year period. These financial statements and the notes thereto should be read in conjunction with the Investing Pools financial statements included in its Annual Report
on Form 10-K for the year ended December 31, 2006 as filed with the SEC on March 30, 2007.

The Investing Pool is not an investment company registered
under the Investment Company Act of 1940, as amended.



|2. | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
|-- | ------------------------------------------



|A. | Basis of Accounting
|-- | -------------------

The accompanying financial statements have
been prepared in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures
of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.



|B. | Investment in CERFs
|-- | -------------------

CERFs are futures contracts listed on the CME
that have a term of approximately five years after listing and whose settlement at expiration is based on the value of the S&P GSCI-ER at that time. The terms of the CERFs require the Investing Pool to deposit initial margin with a value equal
to 100% of the value of each CERF position at the time the position is established, thereby making those positions unleveraged. Because of this, additional variation margin payments are not required. Although daily variation margins are not
required, daily fluctuations in the value of the CERFs are recorded as unrealized gain or loss. When a CERF is closed, the Investing Pool records a realized gain or loss based on the difference between the value of the CERF at the time it was opened
and the value at the time it was closed. The Investing Pool will deposit with the clearing futures commission merchant the required margin for the CERFs in the form of cash or short-term or similar securities.

CERFs are valued at fair value in accordance with FAS 133, which the Manager has determined to be that day's announced CME settlement price for the CERF. If there is no
announced CME settlement price for the CERF on that day, the Manager will use the most recently announced CME settlement price unless the Manager determines that the price is inappropriate as a basis for the valuation of the CERFs.



|C. | Cash and Cash Equivalents
|-- | -------------------------

The Investing Pool defines cash and cash
equivalents to be highly liquid investments with original maturities of three months or less.



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##### Table of Contents

|D. | Short Term Investments
|-- | ----------------------

Short term investments on the statement of
financial condition consist principally of short term fixed income securities with original maturities of one year or less. These investments are valued at amortized cost.



|E. | Securities Transactions, Income and Expense Recognition
|-- | -------------------------------------------------------

Securities
transactions are accounted for on the trade date. Realized gains and losses on investment transactions are determined using the specific identification method. Other income and expenses are recognized on the accrual basis.



|F. | Income Taxes
|-- | ------------

The Investing Pool is an association not taxable as a
corporation and is treated as a partnership for federal, state and local income tax purposes.

No provision for federal, state, and local income taxes has
been made in the accompanying financial statements since the Investing Pool is not subject to income taxes. Holders of interests in the Investing Pool are individually responsible for their own tax payments on their proportionate share of gains,
losses, credits, or deductions.



|G. | Calculation of Net Asset Value
|-- | ------------------------------

The net asset value of the
Investing Pool on any given day is obtained by subtracting the Investing Pools accrued expenses and other liabilities on that day from the value of the assets of the Investing Pool, calculated on each day on which the New York Stock Exchange
is open for regular trading, as soon as practicable after the close of regular trading of the Shares on the New York Stock Exchange (normally at 4:15 P.M., New York City time).



|3. | OFFERING OF THE INVESTING POOL INTERESTS
|-- | ----------------------------------------

Investing Pool interests are
issued only to and redeemable only by the Trust in exchange for a combination of CERFs and cash or short-term or similar securities in lieu of cash. The baskets of CERFs and cash or short-term or similar securities in lieu of cash are transferred to
or from the Trust in exchange for interests in the Investing Pool. Individual investors cannot purchase or redeem Investing Pool interests. The Investing Pool transacts only with the Trust and the Manager.

Redemptions of Investing Pool interests in exchange for CERFs and cash or short-term or similar securities in lieu of cash are treated as sales for financial statement
purposes.



|4. | POOL EXPENSES
|-- | -------------

The Manager pays the amounts that would otherwise be the
ordinary operating expenses, if any, of the Investing Pool. In return for assuming these operating expenses of the Investing Pool, the Manager receives an allocation from the Investing Pool that accrues daily at an annualized rate equal to 0.75% of
the net asset value of the Investing Pool. The Manager has also paid the costs of the Investing Pool's organization.



|5. | RELATED PARTIES
|-- | ---------------

Barclays Global Investors International, Inc., is the
Manager of the Investing Pool, and Barclays Global Investors, N.A. is the Administrator of the Investing Pool. The Manager and the Administrator are considered to be related parties to the Trust and Investing Pool.



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##### Table of Contents

|6. | INDEMNIFICATION
|-- | ---------------

The Trust, the Manager and any officers, agents and
delegates of the Investing Pool (the Indemnitees) shall be entitled to indemnification from the Investing Pool for any loss, damage, claim or expense (including reasonable attorneys fees) incurred by any Indemnitee by reason of any
act or omission performed or omitted by such Indemnitee on behalf of the Investing Pool, unless such act or omission is the result of such Indemnitees gross negligence, bad faith or willful misconduct, and provided that such indemnity shall be
provided out of, and only to the extent of, the Investing Pools assets.



|7. | COMMITMENTS AND CONTINGENT LIABILITIES
|-- | --------------------------------------

In the normal course of business,
the Investing Pool may enter into contracts with service providers that contain general indemnification clauses. The Investing Pool's maximum exposure under these arrangements is unknown as this would involve future claims that may be made against
the Investing Pool that have not yet been made.



|8. | INVESTING IN CERFS
|-- | ------------------

Substantially all of the Investing Pool's assets are
invested in CERFs. The CERF's settlement value at expiration is based on the value of S&P GSCI-ER at that time. Therefore, the value of the Investing Pool will fluctuate based upon the value of the S&P GSCI-ER and the prices of the
commodities underlying the S&P GSCI-ER. The commodities markets have historically been extremely volatile.

As of March 31, 2007, the open CERFs
were as follows:



|          |  |                 |  |                 |  |                    
|--------- |  | --------------- |  | --------------- |  | -------------------
|Contracts |  | Expiration Date |  | Notional Amount |  | Net Unrealized Loss
|2,983     |  | March 2011      |  | $181,813,850    |  | $2,837,480         

As of December 31, 2006, the open CERFs were as follows:



|          |  |                 |  |                 |  |                    
|--------- |  | --------------- |  | --------------- |  | -------------------
|Contracts |  | Expiration Date |  | Notional Amount |  | Net Unrealized Loss
|2,443     |  | March 2011      |  | $143,281,950    |  | $13,751,730        



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##### Table of Contents

|Item 2. | Managements Discussion and Analysis of Financial Condition and Results of Operations
|------- | -------------------------------------------------------------------------------------

This information should be read in conjunction with the financial statements and notes to financial statements included in Item 1 of Part I of this Form 10-Q. The discussion and analysis that follows may
contain statements that relate to future events or future performance. In some cases, such forward-looking statements can be identified by terminology such as may, should, expect, plan,
anticipate, believe, estimate, predict, potential or the negative of these terms or other comparable terminology. None of the Sponsor, the Manager, the Trustee, the Delaware Trustee, or any
other person assumes responsibility for the accuracy or completeness of forward-looking statements. None of the Sponsor, the Manager, the Trustee or the Delaware Trustee is under a duty to update any of the forward-looking statements to conform such
statements to actual results or to a change in the Sponsors expectations or predictions.

Introduction

The iShares® S&P GSCICommodity-Indexed Trust, or the Trust, is a Delaware statutory trust that issues units of beneficial interest, called
Shares, representing fractional undivided beneficial interests in its net assets. Prior to May 9, 2007, the Trust was known as the iShares® GSCI® Commodity-Indexed Trust. Substantially all of the assets of the Trust consist of its holdings of the limited liability company interests of a commodity pool, which are the only
securities in which the Trust may invest. That commodity pool, iShares® S&P GSCICommodity-Indexed Investing Pool LLC, or the Investing Pool, holds long positions in futures contracts, called CERFs, on the S&P GSCI Excess Return Index, or S&P GSCI-ER, listed on the Chicago Mercantile Exchange, or CME, and posts margin in the form of cash or short-term or similar securities
to collateralize its CERF positions. Prior to May 9, 2007, the Investing Pool was known as the iShares® GSCI® Commodity-Indexed Investing Pool LLC. It is the objective of the Trust that the performance of the Shares will correspond generally to the performance of the S&P GSCI Total Return Index, or the Index, before payment of the Trusts and the Investing Pools expenses and liabilities. The Index is intended to reflect the performance of a diversified group of
commodities. Barclays Global Investors International Inc., or BGII, is the Sponsor of the Trust, and Barclays Global Investors, N.A. is the Trustee of the Trust. The Trust and the Investing Pool are commodity pools, as defined in the Commodity
Exchange Act and the applicable regulations of the Commodity Futures Trading Commission, and are operated by BGII, a commodity pool operator registered with the Commodity Futures Trading Commission. Neither the Trust nor the Investing Pool is an
investment company registered under the Investment Company Act of 1940, as amended.

The Trust intends to offer additional Shares on a continuous basis.
The Trust issues and redeems Shares only in one or more blocks of 50,000 Shares called Baskets. These transactions are in exchange for consideration (or redemption proceeds) consisting of CERFs and cash (or, in the discretion of the Sponsor,
short-term or similar securities in lieu of cash) with a value equal to the net asset value per Basket on the date the creation or redemption order is received. Only institutions that become Authorized Participants may purchase or redeem Baskets.
Shareholders who are not Authorized Participants will have no right to redeem their Shares; they may redeem their Shares only through an Authorized Participant and only in Baskets.

Shares of the Trust trade on the New York Stock Exchange under the symbol GSG.

Valuation of CERFs; Computation of Trusts Net Asset Value.

On
each business day on which the New York Stock Exchange is open for regular trading, as soon as practicable after the close of regular trading of the Shares on the New York Stock Exchange (normally, 4:15 P.M., New York time), the Trustee
determines the net asset value of the Trust and the net asset value per Share, or NAV, as of that time. The Trustee values the Trusts assets based upon the determination by the Manager, which may act through the Investing Pool administrator,
of the net asset value of the Investing Pool. The Manager determines the net asset value of the Investing Pool as of the same time that the Trustee determines the net asset value of the Trust.



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##### Table of Contents

The Manager values the Investing Pools long position in CERFs on the basis of that days announced CME
settlement price for the CERF. The value of the Investing Pools CERF position (including any related margin) equals the product of (a) the number of CERF contracts owned by the Investing Pool and (b) the settlement price on the date
of calculation. If there is no announced CME settlement price for the CERF on a business day, the Manager uses the most recently announced CME settlement price unless the Manager determines that that price is inappropriate as a basis for evaluation.
The daily settlement price for the CERF is established by the CME shortly after the close of trading in Chicago on each trading day.

The Manager values
all other property of the Investing Pool at (a) its current market value, if quotations for such property are readily available, or (b) its fair value, as reasonably determined by the Manager, if the current market value cannot be
determined.

Once the value of the CERFs and interest earned on any assets posted as margin and any other assets of the Investing Pool has been determined,
the Manager subtracts all accrued expenses and liabilities of the Investing Pool as of the time of calculation in order to calculate the net asset value of the Investing Pool. The Manager, or the Investing Pool administrator on its behalf, then
calculates the value of the Trusts Investing Pool interest and provides this information to the Trustee.

Once the value of the Trusts
Investing Pool interests has been determined and provided to the Trustee, the Trustee subtracts all accrued expenses and other liabilities of the Trust from the total value of the assets of the Trust, in each case as of the calculation time. The
resulting amount is the net asset value of the Trust. The Trustee determines the NAV, by dividing the net asset value of the Trust by the number of Shares outstanding at the time the calculation is made. Shares to be delivered under a creation order
are considered to be outstanding for purposes of determining the NAV if the applicable creation order was received by the Trustee prior to 2:40 P.M., New York time (or, on any day on which the CME is scheduled to close early, prior to the close of
trading of CERFs on the CME on such day), on the date of calculation. Shares to be delivered under a redemption request are not considered to be outstanding for purposes of calculating the NAV if the applicable redemption request was received by the
Trustee prior to 2:40 P.M., New York time, on the date of calculation.

Liquidity and Capital Resources

The Trusts sole asset as of March 31, 2007 was its investment in the Investing Pool, which is illiquid. The Investing Pools assets consist of CERFs and
cash and short-term securities that are posted as collateral for the Investing Pools CERF positions. The Trust and the Investing Pool do not anticipate any further need for liquidity because creations and redemptions of Shares generally occur
in kind and ordinary expenses are met by cash on hand. Interest earned on the assets posted as collateral are paid to the Investing Pool and are used to pay the fixed fee to the Manager and purchase additional CERFs, or, in the discretion of the
Sponsor, are distributed to Shareholders. In exchange for a fee based on the net asset value of the Investing Pool, the Sponsor and the Manager have assumed most of the ordinary expenses incurred by the Trust and the Investing Pool. In the case of
an extraordinary expense, however, the Investing Pool could be forced to liquidate its CERF positions.

The Sponsor is unaware of any trends, demands,
conditions or events that are reasonably likely to result in material changes to the Trusts or the Investing Pools liquidity needs.

Because
the Investing Pool trades CERFs, its capital is at risk due to changes in the value of the CERFs or other assets (market risk) or the inability of counterparties to perform (credit risk).

Market Risk

The Investing Pool holds CERF positions and posts cash
and short-term or similar securities as margin to collateralize the CERF positions. Because of this limited diversification of the Investing Pools assets, fluctuations in the value of the CERFs are expected to greatly impact the value of the
Shares. The value of its CERFs is expected to track generally the S&P GSCI-ER, although this correlation will not be exact. The S&P GSCI-ER in turn reflects the value of a diversified group of commodities. The market risk associated with the
Investing Pools CERF positions is limited to the amount of cash and short-term or similar securities posted as margin. The Investing Pools exposure to market risk will be influenced by a number of factors, including the liquidity of the
CERF market and activities of other market participants.



17



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##### Table of Contents

Credit Risk

When the
Investing Pool purchases CERFs, it is exposed to the credit risk of a default by the CME clearinghouse, which serves as the counterparty to each CERF position, and of a default by its clearing futures commission merchant. In the case of such a
default, the Investing Pool could be unable to recover amounts due to it on its CERF positions and assets posted as margin.

Off-Balance Sheet
Arrangements and Contractual Obligations

The Trust and the Investing Pool have not used, nor do they expect to use, special purpose entities to
facilitate off-balance sheet financing arrangements. The Trust and the Investing Pool have no loan guarantee arrangements or other off-balance sheet arrangements of any kind other than agreements entered into in the normal course of business, which
may include indemnification provisions related to certain risks service providers undertake in performing services that are in the interest of the Trust and the Investing Pool. While the Trusts and the Investing Pools exposure under such
indemnification provisions cannot be estimated, these general business indemnifications are not expected to have a material impact on either the Trusts or the Investing Pools financial position.

Critical Accounting Estimates

The financial statements and
accompanying notes are prepared in accordance with generally accepted accounting principles in the United States of America. The preparation of these financial statements relies on estimates and assumptions that impact the Trusts and Investing
Pools financial position and results of operations. These estimates and assumptions affect the Trusts and Investing Pools application of accounting policies. In addition, please refer to Note 2 to the financial statements of the
Trust and the Investing Pool for further discussion of the Trusts and the Investing Pools accounting policies.

Results of Operations

The Quarter Ended March 31, 2007

Net Asset
Value of the Trust

The Trusts net asset value grew from $143,425,669 at December 31, 2006 to $182,023,875 at March 31, 2007. The
increase in the Trusts net asset value resulted primarily from an increase in outstanding Shares, which rose from 3,600,000 at December 31, 2006 to 4,350,000 at March 31, 2007 due to 1,050,000 Shares (21 Baskets) being created and
300,000 shares (6 Baskets) being redeemed during the quarter. The Trusts net asset value was also affected by an increase in the price of CERFs during the period from December 31, 2006 to March 31, 2007, which price increased from
$586.50 per CERF to $609.50 per CERF, a 3.92% increase.



|Item 3. | Quantitative and Qualitative Disclosures About Market Risk
|------- | ----------------------------------------------------------

Quantitative Disclosure

The Trust and Investing Pool are exposed to commodity price risk through the Investing
Pools holdings of CERFs. The following table provides information about the Investing Pools futures contract positions, which are sensitive to changes in commodity prices. As of March 31, 2007, the Investing Pools open CERF
positions (long) were as follows:



|                                    |  |   |            
|----------------------------------- |  | - | -----------
|Number of Contracts                 |  |   | 2,983      
|Expiration Date:                    |  |   | March 2011 
|Weighted Average Price per Contract |  | $ | 547.75     
|Fair Value                          |  | $ | 181,813,850



18



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##### Table of Contents

Fair value is calculated using the settlement price for the CERFs on the CME on March 31, 2007, which was $609.50
per contract, and the $100 multiplier applicable under the contract terms.

Qualitative Disclosure

As described herein, it is the objective of the Trust, through its investment in the Investing Pool, that the performance of the Shares will correspond generally to the
performance of the Index, before payment of expenses and liabilities. The Index itself is intended to reflect the performance of a diversified group of physical commodities, including energy commodities, precious and industrial metal commodities,
agricultural commodities and livestock commodities. The Trust obtains this exposure to commodity prices through the Investing Pools CERF positions. As a result, fluctuations in the value of the CERFs are expected to greatly impact the value of
the Shares.

Neither the Trust nor the Investing Pool will engage in any activities designed to obtain a profit from, or ameliorate losses caused by,
changes in the value of the CERFs, any commodities underlying the Index or the S&P GSCI-ER, or any assets posted as margin. Because of the 100% margin requirement applicable to the Investing Pools CERF positions, the market risk associated
with the Investing Pools CERF position is limited to the amount of cash and short-term or similar securities posted as margin.



|Item 4. | Controls and Procedures
|------- | -----------------------

The duly authorized officers of the
Sponsor and Manager performing functions equivalent to those a principal executive officer and principal financial officer of the Trust and the Investing Pool would perform if the Trust and Investing Pool had any officers, and with the participation
of the Trustee and the Investing Pool, have evaluated the effectiveness of the Trusts and Investing Pools disclosure controls and procedures, and have concluded that the disclosure controls and procedures of the Trust and the Investing
Pool have been effective as of the end of the period covered by this report.

There were no changes in the Trusts and Investing Pools internal
control over financial reporting that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, the Trusts and Investing Pools internal control over financial
reporting.

Part II  Other Information



|Item 1. | Legal Proceedings
|------- | -----------------

None.



|Item 1A. | Risk Factors
|-------- | ------------

None.



|Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds
|------- | -----------------------------------------------------------



|a) | None.
|-- | -----



|b) | As described in the Trusts registration statement on Form S-1 (No. 333-142259), proceeds received by the Trust from the issuance and sale of Shares to Authorized Participants
generally consist of long positions in CERFs and cash (or short-term or similar securities in lieu of cash). Such proceeds are delivered to the Investing Pool in return for interests in the Investing Pool. These assets are held on behalf of the
Investing Pool in an account with its clearing futures commission merchant until withdrawn in connection with redemptions of Shares or liquidated to pay expenses and liabilities of the Trust and the Investing Pool not assumed by the Sponsor or the
Manager.
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

|c) | For the quarter ended March 31, 2007, 21 Baskets (1,050,000 Shares) have been created, and 6 Baskets (300,000 Shares) have been redeemed as follows:
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------



|                     |  |                                |  |                         |      
|-------------------- |  | ------------------------------ |  | ----------------------- | -----
|Periods              |  | Total Number of SharesRedeemed |  | Average Price Per Share
|01/01/07 to 01/31/07 |  |                               |  |                         |     
|02/01/07 to 02/28/07 |  | 300,000                        |  | $                       | 39.45
|03/01/07 to 03/31/07 |  |                               |  |                         |     



|Item 3. | Defaults Upon Senior Securities
|------- | -------------------------------

None.



|Item 4. | Submission of Matters to a Vote of Security Holders
|------- | ---------------------------------------------------

None.



|Item 5. | Other Information
|------- | -----------------

None.



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##### Table of Contents

|Item 6. | Exhibits
|------- | --------



|            |  |                                                                                                                                                                    
|----------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit No. |  | Description                                                                                                                                                        
|4.1         |  | Trust Agreement*                                                                                                                                                   
|            | 
|4.2         |  | Limited Liability Company Agreement*                                                                                                                               
|            | 
|4.3         |  | Form of Authorized Participant Agreement*                                                                                                                          
|            | 
|10.1        |  | Investment Advisory Agreement*                                                                                                                                     
|            | 
|10.2        |  | Form of Sublicense Agreement**                                                                                                                                     
|            | 
|10.3        |  | Form of Sublicense Agreement**                                                                                                                                     
|            | 
|10.4        |  | Form of Futures Commission Merchant Agreement**                                                                                                                    
|            | 
|31.1        |  | Certification by Principal Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 for iShares® S&P GSCI Commodity-Indexed Trust.             
|            | 
|31.2        |  | Certification by Principal Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 for iShares® S&P GSCI Commodity-Indexed Trust.             
|            | 
|31.3        |  | Certification by Principal Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 for iShares® S&P GSCI Commodity-Indexed Investing Pool LLC.
|            | 
|31.4        |  | Certification by Principal Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 for iShares® S&P GSCI Commodity-Indexed Investing Pool LLC.
|            | 
|32.1        |  | Certification by Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.             
|            | 
|32.2        |  | Certification by Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.             



|* | Incorporated by reference to our Registration Statement on Form S-1/A (No. 333-126810) filed with the Securities and Exchange Commission on July 14, 2006.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------

|** | Incorporated by reference to our Registration Statement Form S-1/A (No. 333-126810) filed with the Securities and Exchange Commission on April 26, 2006.
|-- | --------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant and Co-Registrant have duly
caused this report to be signed on their behalf by the undersigned in the capacities* indicated thereunto duly authorized.



|                                                                      
|----------------------------------------------------------------------
|Barclays Global Investors International, Inc.                         
|Sponsor of the iShares® S&P GSCI Commodity-Indexed Trust             
|(Registrant)                                                          
|Manager of the iShares® S&P GSCI Commodity-Indexed Investing Pool LLC
|(Co-Registrant)                                                       
|                                                                      
|/s/ Lee T. Kranefuss                                                  
|Lee T. Kranefuss                                                      
|Chief Executive Officer                                               
|(Principal executive officer)                                         
|                                                                      
|Date: May 15, 2007                                                    
|                                                                      
|/s/ Michael A. Latham                                                 
|Michael A. Latham                                                     
|Chief Financial Officer                                               
|(Principal financial officer)                                         
|                                                                      
|Date: May 15, 2007                                                    



|* | The Registrant is a trust and the Co-Registrant is a limited liability company, and the persons are signing in their capacities as officers of Barclays Global Investors
International, Inc., the Sponsor of the Registrant and Manager of the Co-Registrant.
|- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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