UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-3480

Fidelity Oxford Street Trust
(Exact name of registrant as specified in charter)

82 Devonshire St., Boston, Massachusetts 02109
(Address of principal executive offices)       (Zip code)

Scott C. Goebel, Secretary

82 Devonshire St.

Boston, Massachusetts 02109
(Name and address of agent for service)

Registrant's telephone number, including area code: 617-563-7000

Date of fiscal year end:	February 28
Date of reporting period:	August 31, 2012

Item 1. Reports to Stockholders

Fidelity®

Four-in-One Index

Fund

Semiannual Report

August 31, 2012

(Fidelity Cover Art)

Contents

Shareholder Expense Example	(Click Here)	An example of shareholder expenses.
Investment Changes	(Click Here)	A summary of major shifts in the fund's investments over the past six months.
Investments	(Click Here)	A complete list of the fund's investments with their market values.
Financial Statements	(Click Here)	Statements of assets and liabilities, operations, and changes in net assets, as well as financial highlights.
Notes	(Click Here)	Notes to the financial statements.

To view a fund's proxy voting guidelines and proxy voting record for the 12-month period ended June 30, visit http://www.fidelity.com/proxyvotingresults or visit the Securities and Exchange Commission's (SEC) web site at http://www.sec.gov. You may also call 1-800-544-8544 to request a free copy of the proxy voting guidelines.

Standard & Poor's, S&P and S&P 500 are registered service marks of The McGraw-Hill Companies, Inc. and have been licensed for use by Fidelity Distributors Corporation.

Other third party marks appearing herein are the property of their respective owners.

All other marks appearing herein are registered or unregistered trademarks or service marks of FMR LLC or an affiliated company. © 2012 FMR LLC. All rights reserved.

This report and the financial statements contained herein are submitted for the general information of the shareholders of the fund. This report is not authorized for distribution to prospective investors in the fund unless preceded or accompanied by an effective prospectus.

A fund files its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. Forms N-Q are available on the SEC's web site at http://www.sec.gov. A fund's Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information regarding the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC-0330. For a complete list of a fund's portfolio holdings, view the most recent holdings listing, semiannual report, or annual report on Fidelity's web site at http://www.fidelity.com, http://www.advisor.fidelity.com, or http://www.401k.com, as applicable.

NOT FDIC INSURED • MAY LOSE VALUE • NO BANK GUARANTEE

Neither the fund nor Fidelity Distributors Corporation is a bank.

Semiannual Report

Shareholder Expense Example

As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, and (2) ongoing costs, including management fees and other Fund expenses. This Example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period (March 1, 2012 to August 31, 2012).

Actual Expenses

The first line of the accompanying table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000.00 (for example, an $8,600 account value divided by $1,000.00 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. An annual index fund fee of $10 that is charged once a year may apply for certain accounts with a value of less than $10,000. Various account fees may also be payable to the custodian for certain services. These fees are not included in the table below. If they were, the estimate of expenses you paid during the period would be higher, and your ending account value lower, by these amounts. In addition, the Fund, as a shareholder in underlying Fidelity Funds, will indirectly bear its pro-rata share of the fees and expenses incurred by the underlying Fidelity Funds. These fees and expenses are not included in the Fund's annualized expense ratio used to calculate the expense estimate in the table below.

Hypothetical Example for Comparison Purposes

The second line of the accompanying table provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. An annual index fund fee of $10 that is charged once a year may apply for certain accounts with a value of less than $10,000. Various account fees may also be payable to the custodian for certain services. These fees are not included in the table below. If they were, the estimate of expenses you paid during the period would be higher, and your ending account value lower, by these amounts. In addition, the Fund, as a shareholder in underlying Fidelity Funds, will indirectly bear its pro-rata share of the fees and expenses incurred by the underlying Fidelity Funds. These fees and expenses are not included in the Fund's annualized expense ratio used to calculate the expense estimate in the table below.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transaction costs. Therefore, the second line of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds.

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Shareholder Expense Example - continued

	Annualized Expense Ratio	Beginning Account Value March 1, 2012	Ending Account Value August 31, 2012	Expenses Paid During Period* March 1, 2012 to August 31, 2012
Actual	.08%	$ 1,000.00	$ 1,016.10	$ .41
Hypothetical (5% return per year before expenses)		$ 1,000.00	$ 1,024.80	$ .41

* Expenses are equal to the Fund's annualized expense ratio, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the one-half year period). The fees and expenses of the underlying Fidelity Funds in which the Fund invests are not included in the Fund's annualized expense ratio.

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Investment Changes (Unaudited)

Fund Holdings as of August 31, 2012

	% of fund's net assets	% of fund's net assets 6 months ago	% Target Investment Allocation
Spartan 500 Index Fund Investor Class	48.0	48.0	48.0
Spartan Extended Market Index Fund Investor Class	12.0	12.0	12.0
Spartan International Index Fund Investor Class	25.0	24.9	25.0
Spartan U.S. Bond Index Fund Investor Class	15.0	15.1	15.0
Net Other Assets	0.0†	0.0†	0.0
	100.0	100.0	100.0
Asset Allocation (% of fund's net assets)
As of August 31, 2012
	Domestic Equity Funds 60.0%
	International Equity Funds 25.0%
	Investment Grade Fixed-Income Funds 15.0%

As of February 29, 2012
	Domestic Equity Funds 60.0%
	International Equity Funds 24.9%
	Investment Grade Fixed-Income Funds 15.1%

^† Amount represents less than 0.1%

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Investments August 31, 2012 (Unaudited)

Showing Percentage of Net Assets

Equity Funds - 85.0%
	Shares		Value
Domestic Equity Funds - 60.0%
Spartan 500 Index Fund Investor Class	22,396,283		$ 1,120,038,116
Spartan Extended Market Index Fund Investor Class	7,131,414		280,050,609
TOTAL DOMESTIC EQUITY FUNDS			1,400,088,725
International Equity Funds - 25.0%
Spartan International Index Fund Investor Class	18,328,419		584,859,857
TOTAL EQUITY FUNDS (Cost $1,650,979,978)		1,984,948,582
Fixed-Income Funds - 15.0%
Investment Grade Fixed-Income Funds - 15.0%
Spartan U.S. Bond Index Fund Investor Class (Cost $317,650,287)	29,074,331		350,054,941
TOTAL INVESTMENT PORTFOLIO - 100.0% (Cost $1,968,630,265)			2,335,003,523
NET OTHER ASSETS (LIABILITIES) - 0.0%			30,420
NET ASSETS - 100%		$ 2,335,033,943

Other Information

All investments are categorized as Level 1 under the Fair Value Hierarchy. The inputs or methodology used for valuing securities may not be an indication of the risk associated with investing in those securities. For more information on valuation inputs, please refer to the Security Valuation section in the accompanying Notes to Financial Statements.

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Financial Statements

Statement of Assets and Liabilities

	August 31, 2012 (Unaudited)
Assets
Investment in securities, at value (cost $1,968,630,265) - See accompanying schedule		$ 2,335,003,523
Receivable for investments sold		5,922,608
Receivable for fund shares sold		867,047
Receivable from investment adviser for expense reductions		38,885
Total assets		2,341,832,063
Liabilities
Payable for investments purchased	$ 5,730,228
Payable for fund shares redeemed	873,579
Accrued management fee	194,313
Total liabilities		6,798,120
Net Assets		$ 2,335,033,943
Net Assets consist of:
Paid in capital		$ 2,081,600,995
Undistributed net investment income		13,953,171
Accumulated undistributed net realized gain (loss) on investments		(126,893,481)
Net unrealized appreciation (depreciation) on investments		366,373,258
Net Assets, for 81,530,391 shares outstanding		$ 2,335,033,943
Net Asset Value, offering price and redemption price per share ($2,335,033,943 ÷ 81,530,391 shares)		$ 28.64

See accompanying notes which are an integral part of the financial statements.

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Financial Statements - continued

Statement of Operations

Six months ended August 31, 2012 (Unaudited)
Investment Income
Income distributions from underlying funds		$ 14,965,018
Expenses
Management fee	$ 1,148,274
Independent trustees' compensation	3,915
Total expenses before reductions	1,152,189
Expense reductions	(230,436)	921,753
Net investment income (loss)		14,043,265
Realized and Unrealized Gain (Loss) Realized gain (loss) on sale of underlying fund shares	(672,579)
Capital gain distributions from underlying funds	2,695,326
Total net realized gain (loss)		2,022,747
Change in net unrealized appreciation (depreciation) on underlying funds		20,036,069
Net gain (loss)		22,058,816
Net increase (decrease) in net assets resulting from operations		$ 36,102,081

See accompanying notes which are an integral part of the financial statements.

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Statement of Changes in Net Assets

	Six months ended August 31, 2012 (Unaudited)	Year ended February 29, 2012
Increase (Decrease) in Net Assets
Operations
Net investment income (loss)	$ 14,043,265	$ 52,871,512
Net realized gain (loss)	2,022,747	1,861,495
Change in net unrealized appreciation (depreciation)	20,036,069	(17,032,969)
Net increase (decrease) in net assets resulting from operations	36,102,081	37,700,038
Distributions to shareholders from net investment income	(1,166,932)	(52,797,084)
Distributions to shareholders from net realized gain	-	(1,573,281)
Total distributions	(1,166,932)	(54,370,365)
Share transactions Proceeds from sales of shares	116,901,615	338,829,981
Reinvestment of distributions	1,113,981	51,740,036
Cost of shares redeemed	(174,627,735)	(442,197,410)
Net increase (decrease) in net assets resulting from share transactions	(56,612,139)	(51,627,393)
Total increase (decrease) in net assets	(21,676,990)	(68,297,720)
Net Assets
Beginning of period	2,356,710,933	2,425,008,653
End of period (including undistributed net investment income of $13,953,171 and undistributed net investment income of $1,076,838, respectively)	$ 2,335,033,943	$ 2,356,710,933
Other Information Shares
Sold	4,188,770	12,414,595
Issued in reinvestment of distributions	39,885	1,986,906
Redeemed	(6,267,197)	(16,345,925)
Net increase (decrease)	(2,038,542)	(1,944,424)

See accompanying notes which are an integral part of the financial statements.

Semiannual Report

Financial Highlights

	Six months ended August 31, 2012	Years ended February 28,
	(Unaudited)	2012 G	2011	2010	2009	2008 G
Selected Per-Share Data
Net asset value, beginning of period	$ 28.20	$ 28.36	$ 24.00	$ 16.64	$ 28.30	$ 29.69
Income from Investment Operations
Net investment income (loss) D	.17	.62	.51	.54	.64	.69
Net realized and unrealized gain (loss)	.28	(.12)	4.42	7.35	(11.56)	(1.24)
Total from investment operations	.45	.50	4.93	7.89	(10.92)	(.55)
Distributions from net investment income	(.01)	(.64)	(.53)	(.50)	(.62)	(.66)
Distributions from net realized gain	-	(.02)	(.04)	(.03)	(.12)	(.18)
Total distributions	(.01)	(.66)	(.57)	(.53)	(.74)	(.84)
Net asset value, end of period	$ 28.64	$ 28.20	$ 28.36	$ 24.00	$ 16.64	$ 28.30
Total Return B, C	1.61%	1.94%	20.68%	47.36%	(39.07)%	(2.06)%
Ratios to Average Net Assets F
Expenses before reductions	.10% A	.10%	.10%	.10%	.10%	.10%
Expenses net of fee waivers, if any	.08% A	.08%	.08%	.08%	.08%	.08%
Expenses netof all reductions	.08% A	.08%	.08%	.08%	.08%	.08%
Net investment income (loss)	1.22% A	2.29%	2.00%	2.42%	2.65%	2.24%
Supplemental Data
Net assets, end of period (000 omitted)	$ 2,335,034	$ 2,356,711	$ 2,425,009	$ 2,060,208	$ 1,234,201	$ 1,838,953
Portfolio turnover rate E	10% A	16%	19%	26%	21%	8%

^A Annualized

^B Total returns for periods of less than one year are not annualized.

^C Total returns would have been lower if certain expenses had not been reduced during the applicable periods shown.

^D Calculated based on average shares outstanding during the period.

^E Amounts do not include the activity of the Underlying Funds.

^F Expense ratios reflect operating expenses of the Fund. Expenses before reductions do not reflect amounts reimbursed by the investment adviser or reductions from expense offset arrangements and do not represent the amount paid by the Fund during periods when reimbursements or reductions occur. Expenses net of fee waivers reflect expenses after reimbursement by the investment adviser but prior to reductions from expense offset arrangements. Expenses net of all reductions represent the net expenses paid by the Fund but do not include expenses of the investment companies in which the Fund invests.

^G For the year ended February 29.

See accompanying notes which are an integral part of the financial statements.

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Notes to Financial Statements

For the period ended August 31, 2012 (Unaudited)

1. Organization.

Fidelity® Four-in-One Index Fund (the Fund) is a fund of Fidelity Oxford Street Trust (the Trust) and is authorized to issue an unlimited number of shares. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust. The Fund invests primarily in a combination of Fidelity index funds (the Underlying Funds) managed by Fidelity Management & Research Company (FMR). Geode Capital Management, LLC serves as sub-adviser for the underlying stock funds.

2. Significant Accounting Policies.

The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP), which require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from those estimates. Subsequent events, if any, through the date that the financial statements were issued have been evaluated in the preparation of the financial statements. The following summarizes the significant accounting policies of the Fund:

Security Valuation. Investments are valued as of 4:00 p.m. Eastern time on the last calendar day of the period. The Fund categorizes the inputs to valuation techniques used to value its investments into a disclosure hierarchy consisting of three levels as shown below:

Level 1 - quoted prices in active markets for identical investments

Level 2 - other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, etc.)

Level 3 - unobservable inputs (including the Fund's own assumptions based on the best information available)

Valuation techniques used to value the Fund's investments by major category are as follows. Investments in the Underlying Funds are valued at their closing net asset value (NAV) each business day and are categorized as Level 1 in the hierarchy.

Investment Transactions and Income. For financial reporting purposes, the Fund's investment holdings and NAV include trades executed through the end of the last business day of the period. The NAV per share for processing shareholder transactions is calculated as of the close of business of the New York Stock Exchange (NYSE), normally 4:00 p.m. Eastern time and includes trades executed through the end of the prior business day. Gains and losses on securities sold are determined on the basis of identified cost. Income and capital gain distributions from the Underlying Funds, if any, are recorded on the ex-dividend date.

Semiannual Report

2. Significant Accounting Policies - continued

Expenses. Expenses directly attributable to a fund are charged to that fund. Expenses attributable to more than one fund are allocated among the respective funds on the basis of relative net assets or other appropriate methods. Expenses included in the accompanying financial statements reflect the expenses of the Fund and do not include any expenses associated with the Underlying Funds. Expense estimates are accrued in the period to which they relate and adjustments are made when actual amounts are known.

Income Tax Information and Distributions to Shareholders. Each year, the Fund intends to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code, including distributing substantially all of its taxable income and realized gains. As a result, no provision for income taxes is required. The Fund files a U.S. federal tax return, in addition to state and local tax returns as required. A fund's federal income tax returns are subject to examination by the Internal Revenue Service (IRS) for a period of three fiscal years after they are filed. State and local tax returns may be subject to examination for an additional fiscal year depending on the jurisdiction.

Distributions are declared and recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP.

Capital accounts within the financial statements are adjusted for permanent book-tax differences. These adjustments have no impact on net assets or the results of operations. Temporary book-tax differences will reverse in a subsequent period.

Book-tax differences are primarily due to the short-term gain distributions from the Underlying Funds, capital loss carryforwards and losses deferred due to wash sales and excise tax regulations.

The federal tax cost of investment securities and unrealized appreciation (depreciation) as of period end were as follows:

Gross unrealized appreciation	$ 357,154,655
Gross unrealized depreciation	(17,302,505)
Net unrealized appreciation (depreciation) on securities and other investments	$ 339,852,150
Tax cost	$ 1,995,151,373

Capital loss carryforwards are only available to offset future capital gains of the Fund to the extent provided by regulations and may be limited. Under the Regulated Investment Company Modernization Act of 2010 (the Act), the Fund is permitted to carry forward capital losses incurred in taxable years beginning after December 22, 2010 for an

Semiannual Report

Notes to Financial Statements (Unaudited) - continued

2. Significant Accounting Policies - continued

Income Tax Information and Distributions to Shareholders - continued

unlimited period and such capital losses are required to be used prior to any losses that expire. At February 29, 2012, capital loss carryforwards were as follows:

Fiscal year of expiration
2018	$ (67,569,390)
2019	(32,354,775)
Total capital loss carryforward	$ (99,924,165)

3. Purchases and Sales of Investments.

Purchases and redemptions of the Underlying Fund shares aggregated $116,992,041 and $158,033,182, respectively.

4. Fees and Other Transactions with Affiliates.

Management Fee. Strategic Advisers, Inc. (Strategic Advisers), an affiliate of FMR, provides the Fund with investment management related services. For these services the Fund pays a monthly management fee to Strategic Advisers. The management fee is computed at an annual rate of .10% of the Fund's average net assets. The management fee is reduced by an amount equal to the fees and expenses paid by the Fund to the independent Trustees.

Other Transactions. Strategic Advisers has entered into an administration agreement with FMR under which FMR provides management and administrative services (other than investment advisory services) necessary for the operation of the Fund. Pursuant to this agreement, FMR pays all expenses of the Fund, excluding the compensation of the independent Trustees and certain other expenses such as interest expense. FMR also contracts with other Fidelity companies to perform the services necessary for the operation of the Fund. For the services under the agreement, Strategic Advisers pays FMR a monthly administration fee equal to the management fee received by Strategic Advisers, minus an amount equal to an annual rate of .02% of the Funds average net assets. The Fund does not pay any fees for these services.

5. Expense Reductions.

FMR voluntarily agreed to reimburse the Fund to the extent annual operating expenses exceeded .08% of average net assets. Effective March 1, 2012, this became a contractual agreement and will remain in place through April 30, 2015. Some expenses, for example interest expense, are excluded from this reimbursement. During the period this reimbursement reduced the Fund's expenses by $230,436.

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6. Other.

The Fund's organizational documents provide former and current trustees and officers with a limited indemnification against liabilities arising in connection with the performance of their duties to the Fund. In the normal course of business, the Fund may also enter into contracts that provide general indemnifications. The Fund's maximum exposure under these arrangements is unknown as this would be dependent on future claims that may be made against the Fund. The risk of material loss from such claims is considered remote.

Semiannual Report

Investment Adviser

Strategic Advisers, Inc.
Boston, MA

General Distributor

Fidelity Distributors Corporation
Smithfield, RI

Transfer and Service Agents

Fidelity Investments Institutional
Operations Company, Inc.
Boston, MA 

Fidelity Service Company, Inc.
Boston, MA 

Custodian

The Bank of New York Mellon
New York, NY

The Fidelity Telephone Connection

Mutual Fund 24-Hour Service

Exchanges/Redemptions
and Account Assistance 1-800-544-6666

Product Information 1-800-544-6666

Retirement Accounts 1-800-544-4774
(8 a.m. - 9 p.m.)

TDD Service 1-800-544-0118
for the deaf and hearing impaired
(9 a.m. - 9 p.m. Eastern time)

Fidelity Automated Service
Telephone (FAST ®)
1-800-544-5555

Automated line for quickest service

(Fidelity Investment logo)(registered trademark)
Corporate Headquarters
82 Devonshire St., Boston, MA 02109
www.fidelity.com

IDV-USAN-1012
1.790939.109

Item 2. Code of Ethics

Not applicable.

Item 3. Audit Committee Financial Expert

Not applicable.

Item 4. Principal Accountant Fees and Services

Not applicable.

Item 5. Audit Committee of Listed Registrants

Not applicable.

Item 6. Investments

(a) Not applicable.

(b) Not applicable

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies

Not applicable.

Item 8. Portfolio Managers of Closed-End Management Investment Companies

Not applicable.

Item 9. Purchase of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers

Not applicable.

Item 10. Submission of Matters to a Vote of Security Holders

There were no material changes to the procedures by which shareholders may recommend nominees to the Fidelity Oxford Street Trust's Board of Trustees.

Item 11. Controls and Procedures

(a)(i) The President and Treasurer and the Chief Financial Officer have concluded that the Fidelity Oxford Street Trust's (the "Trust") disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act) provide reasonable assurances that material information relating to the Trust is made known to them by the appropriate persons, based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report.

(a)(ii) There was no change in the Trust's internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act) that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the Trust's internal control over financial reporting.

Item 12. Exhibits

(a)	(1)	Not applicable.
(a)	(2)	Certification pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) is filed and attached hereto as Exhibit 99.CERT.
(a)	(3)	Not applicable.
(b)		Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940 (17 CFR 270.30a-2(b)) is furnished and attached hereto as Exhibit 99.906CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Fidelity Oxford Street Trust

By:	/s/John R. Hebble
	John R. Hebble
	President and Treasurer
Date:	October 26, 2012

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:	/s/John R. Hebble
	John R. Hebble
	President and Treasurer
Date:	October 26, 2012

By:	/s/Christine Reynolds
	Christine Reynolds
	Chief Financial Officer
Date:	October 26, 2012