Oppenheimer Master Inflation Protected Securities Fund N-CSR Certified annual shareholder report (management investment company)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORMN-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT

INVESTMENT COMPANIES

Investment Company Act file number811-22420

Oppenheimer Master Inflation Protected Securities Fund, LLC

(Exact name of registrant as specified in charter)

6803 South Tucson Way, Centennial, Colorado 80112-3924

(Address of principal executive offices) (Zip code)

Cynthia Lo Bessette

OFI Global Asset Management, Inc.

225 Liberty Street, New York, New York 10281-1008

(Name and address of agent for service)

Registrant’s telephone number, including area code:(303)768-3200

Date of fiscal year end:January 31

Date of reporting period:1/31/2019

Item 1.  Reports to Stockholders.

Important Updates

On October 18, 2018, Massachusetts Mutual Life Insurance Company, an indirect corporate parent of OppenheimerFunds, Inc. and its subsidiaries OFI Global Asset Management, Inc., OFI SteelPath, Inc. and OFI Advisors, LLC, announced that it has entered into an agreement whereby Invesco Ltd., a global investment management company, will acquire OppenheimerFunds, Inc. As of the date of this report, the transaction is expected to close in the second quarter of 2019, pending necessary regulatory and other third-party approvals. This is subject to change. See the Notes to Financial Statements for more information.

Update to Shareholder Report Document Delivery

Beginning January 1, 2021, OppenheimerFunds will send a notice, either by mail or email, each time your fund’s updated report is available on our website(oppenheimerfunds.com). Investors who are not enrolled in electronic delivery by January 1, 2021 will receive the notice in the mail. Enrolling in electronic delivery will enable you to receive a direct link to your full shareholder report the moment it becomes available, and limit the amount of mail you receive. All investors who prefer to receive shareholder reports in paper may, at any time, choose that option.

How do you update your delivery preferences?

If you own these shares through a financial intermediary, you may contact your financial intermediary.

If your accounts are held through OppenheimerFunds and you receive statements, confirms, and other documents directly from us, you can enroll in our eDocs DirectSM service atoppenheimerfunds.com or by calling us. Once you’re enrolled, you’ll begin to receive email notifications of updated documents when they become available. If you have any questions, feel free to call us at1.800.225.5677.

Table of Contents

Fund Performance Discussion	5
Top Holdings and Allocations	6
Fund Expenses	7
Statement of Investments	9
Statement of Assets and Liabilities	12
Statement of Operations	13
Statements of Changes in Net Assets	14
Financial Highlights	15
Notes to Financial Statements	16
Report of Independent Registered Public Accounting Firm	28
Board Approval of the Fund’s Investment Advisory and Sub- Advisory Agreements	29
Portfolio Proxy Voting Policies and Guidelines; Updates to Statement of Investments	32
Directors and Officers	33

PORTFOLIO MANAGER:Young-Sup Lee

AVERAGE ANNUAL TOTAL RETURNS AT 1/31/19

	Oppenheimer Master Inflation Protected Securities Fund, LLC	Bloomberg Barclays U.S. Treasury Inflation Protected Securities (TIPS) Index
1-Year	0.58%	0.93%
5-Year	1.23	1.57
Since Inception (6/2/10)	2.26	2.76

Performance data quoted represents past performance, which does not guarantee future results.The investment return and principal value of an investment in the Fund will fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance quoted. Returns do not consider capital gains or income taxes on an individual’s investment. Fund returns include changes in share price and reinvested distributions. See Fund prospectuses and summary prospectuses for more information on share classes and sales charges.

The Fund’s performance is compared to the performance of the Bloomberg Barclays U.S. Treasury Inflation Protected Securities (TIPS) Index, which includes all publicly issued, U.S. Treasury inflation-protected securities that have at least one year remaining to maturity, are rated investment grade, and have $25 million or more of outstanding face value. The Index

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isunmanaged and cannot be purchased directly by investors. While index comparisons may be useful to provide a benchmark for the Fund’s performance, it must be noted that the Fund’s investments are not limited to the investments comprising theIndex. Index performance includes reinvestment of income, but does not reflect transaction costs, fees, expenses or taxes. Index performance is shown for illustrative purposes only as a benchmark for the Fund’s performance, and does not predict or depict performance of the Fund. The Fund’s performance reflects the effects of the Fund’s business and operating expenses.

The views in the Fund Performance Discussion represent the opinions of this Fund’s portfolio manager(s) and are not intended as investment advice or to predict or depict the performance of any investment. These views are as of the close of business on January 31, 2019, and are subject to change based on subsequent developments. The Fund’s portfolio and strategies are subject to change.

Shares of Oppenheimer Master Inflation Protected Securities Fund, LLC are issued solely in private placement transactions that do not involve any “public offering” within the meaning of Section 4(a)(2) of the Securities Act of 1933 (the “Securities Act”), as amended. Investments in the Fund may only be made by certain “accredited investors” within the meaning of Regulation D under the Securities Act, including other investment companies. This report does not constitute an offer to sell, or the solicitation of an offer to buy, any “security” within the meaning of the Securities Act.

Shares of Oppenheimer funds are not deposits or obligations of any bank, are not guaranteed by any bank, are not insured by the FDIC or any other agency, and involve investment risks, including the possible loss of the principal amount invested.

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Fund Performance Discussion

The Fund returned 0.58% over the reporting period, while its benchmark, the Bloomberg Barclays

U.S. Treasury Inflation Protected Securities (“TIPS”) Index (the “Index”), returned 0.93% during the same period. The Fund’s underperformance relative to the Index was largely the result of fees, as Index performance includes reinvestment of income, but does not reflect transaction costs, fees, expenses or taxes.

The Fund invests primarily in TIPS, which comprised of roughly 97% of the Fund’s investments at period end. The performance of TIPS is closely correlated to the expected U.S. inflation rates. For the 12 months ended January 31, 2019, the Consumer Price Index (“CPI”) annual inflation rate was

1.6% before seasonal adjustment, according to data from the Bureau of Labor Statistics. As such, TIPS produced muted positive results this period. The Fund’s exposure to TIPS outperformed the benchmark during the reporting period.

The Fund had exposure toout-of-Index positions, which contributed positively to performance versus the Index this reporting period. Namely, our exposure to asset-backed securities (“ABS”) benefited the Fund.

COMPARISON OF CHANGE IN VALUE OF $10,000 HYPOTHETICAL INVESTMENTS IN:

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Top Holdings and Allocations

PORTFOLIO ALLOCATION
U.S. Government Obligations	96.6%
Asset-Backed Securities	2.3
Investment Company
Oppenheimer Institutional
Government Money Market
Fund	0.9
Mortgage-Backed Obligations
Government Agency	0.1
Non-Agency	0.1

Portfolio holdings and allocations are subject to change. Percentages are as of January 31, 2019, and are based on the total market value of investments.

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Fund Expenses

Fund Expenses. As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, which may include sales charges (loads) on purchase payments and/or contingent deferred sales charges on redemptions; and (2) ongoing costs, including management fees; distribution and service fees; and other Fund expenses. These examples are 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 examples are based on an investment of $1,000.00 invested at the beginning of the period and held for the entire6-month period ended January 31, 2019.

Actual Expenses. The first section of the table provides information about actual account values and actual expenses. You may use the information in this section, together with the amount you invested, to estimate the expense that you paid over the period. Simply divide your account value by $1,000.00 (for example, an $8,600.00 account value divided by $1,000.00 = 8.60), then multiply the result by the number in the first section under the heading entitled “Expenses Paid During 6 Months Ended January 31, 2019” to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes.The second section of the 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.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such asfront-end or contingent deferred sales charges (loads). Therefore, the “hypothetical” section of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

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Actual	Beginning Account Value August 1, 2018	Ending Account Value January 31, 2019	Expenses Paid During 6 Months Ended January 31, 2019
	$    1,000.00	$    1,005.00	$        2.43
Hypothetical (5% return before expenses)
	1,000.00	1,022.79	2.45

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 theone-half year period). The annualized expense ratio, excluding indirect expenses from affiliated funds, based on the6-month period ended January 31, 2019 is as follows:

Expense Ratio

0.48%

The expense ratio reflects voluntary and/or contractual waivers and/or reimbursements of expenses by the Fund’s Manager. Some of these undertakings may be modified or terminated at any time, as indicated in the Fund’s prospectus. The “Financial Highlights” table in the Fund’s financial statements, included in this report, also shows the gross expense ratio, without such waivers or reimbursements and reduction to custodian expenses, if applicable.

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STATEMENT OF INVESTMENTSJanuary 31, 2019

	Principal Amount		Value
Asset-Backed Securities—2.3%
AmeriCredit Automobile Receivables Trust:
Series2014-2, Cl. D, 2.57%, 7/8/20	$	180,255	$	180,218
Series2016-2, Cl. D, 3.65%, 5/9/22		400,000		402,825
Series2016-3, Cl. D, 2.71%, 9/8/22		93,000		92,096
Series2016-4, Cl. D, 2.74%, 12/8/22		400,000		395,748
Series2017-1, Cl. D, 3.13%, 1/18/23		200,000		198,255
Drive Auto Receivables Trust, Series2017-BA, Cl. D, 3.72%, 10/17/221		220,000		220,711
DT Auto Owner Trust, Series2016-2A, Cl. D, 5.43%, 11/15/221		350,000		352,976
Santander Drive Auto Receivables Trust, Series2015-4, Cl. D, 3.53%, 8/16/21		315,000		316,100
Total Asset-Backed Securities (Cost $2,162,153)				2,158,929
Mortgage-Backed Obligations—0.2%
Federal Home Loan Mortgage Corp., Real Estate Mtg.
Investment Conduit Multiclass Pass-Through Certificates,
Series 2716, Cl. UN, 4.50%, 12/15/23		22,267		22,712
Federal Home Loan Mortgage Corp., Real Estate Mtg.
Investment Conduit Multiclass Pass-Through Certificates,
Interest-Only Stripped Mtg.-Backed Security, Series 3031, Cl.
BI, 22.256%, 8/15/352		17,705		3,196
Federal National Mortgage Assn., Real Estate Mtg. Investment
Conduit Multiclass Pass-Through Certificates, Series2008-24,
Cl. DY, 5.00%, 4/25/23		425		426
Federal National Mortgage Assn., Real Estate Mtg. Investment Conduit Multiclass Pass-Through Certificates, Interest- Only Stripped Mtg.-Backed Security:
Series2005-87, Cl. SE, 2.035%, 10/25/352		186,215		25,884
Series2005-93, Cl. SI, 0.109%, 10/25/352		185,641		26,826
Series2007-88, Cl. XI, 0.00%, 6/25/372,3		150,107		23,097
Series2011-96, Cl. SA, 3.942%, 10/25/412		133,897		20,535
Wells Fargo Mortgage-Backed Securities Trust, Series 2005-
AR15, Cl. 1A2, 4.67%, 9/25/354		30,636		29,895
Total Mortgage-Backed Obligations (Cost $156,677)				152,571
U.S. Government Obligations—96.5%
United States Treasury Inflation-Protected Securities:
0.125%, 7/15/225		18,960,627		18,653,889
0.25%, 1/15/255		20,164,885		19,648,066
0.625%,1/15/24-2/15/435		14,275,031		13,799,903
0.875%, 2/15/475		835,280		793,842
1.00%,2/15/46-2/15/485		5,014,866		4,919,406
1.375%,1/15/20-2/15/445		14,785,361		15,017,441
2.50%, 1/15/295		9,860,844		11,465,606
3.625%, 4/15/285		6,622,733		8,278,157
Total U.S. Government Obligations (Cost $92,852,428)				92,576,310

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STATEMENT OF INVESTMENTSContinued

	Shares		Value
Investment Company—0.9%
Oppenheimer Institutional Government Money Market Fund, Cl. E, 2.35%6,7
(Cost $903,346)		903,346	$	903,346
Total Investments, at Value (Cost $96,074,604)		99.9%		95,791,156
Net Other Assets (Liabilities)		0.1		126,536
Net Assets		100.0%	$	95,917,692

Footnotes to Statement of Investments

1. Represents securities sold under Rule 144A, which are exempt from registration under the Securities Act of 1933, as amended. These securities have been determined to be liquid under guidelines established by the Board of Directors. These securities amount to $573,687 or 0.60% of the Fund’s net assets at period end.

2. Interest-Only Strips represent the right to receive the monthly interest payments on an underlying pool of mortgage loans. These securities typically decline in price as interest rates decline. Most other fixed income securities increase in price when interest rates decline. The principal amount of the underlying pool represents the notional amount on which current interest is calculated. The price of these securities is typically more sensitive to changes in prepayment rates than traditional mortgage-backed securities (for example, GNMA pass-throughs). Interest rates disclosed represent current yields based upon the current cost basis and estimated timing and amount of future cash flows.

These securities amount to $99,538 or 0.10% of the Fund’s net assets at period end.

3. Interest rate is less than 0.0005%.

4. This interest rate resets periodically. Interest rate shown reflects the rate in effect at period end. The rate on this variable rate security is not based on a published reference rate and spread but is determined by the issuer or agent based on current market conditions.

5. Denotes an inflation-indexed security: coupon or principal are indexed to a consumer price index.

6. Rate shown is the7-day yield at period end.

7. Is or was an affiliate, as defined in the Investment Company Act of 1940, as amended, at or during the reporting period, by virtue of the Fund owning at least 5% of the voting securities of the issuer or as a result of the Fund and the issuer having the same investment adviser. Transactions during the reporting period in which the issuer was an affiliate are as follows:

	Shares January 31, 2018		Gross Additions		Gross Reductions		Shares January 31, 2019
Investment Company
Oppenheimer Institutional Government Money Market Fund, Cl. E		181,528		74,848,730		74,126,912		903,346
	Value		Income		Realized Gain (Loss)		Change in Unrealized Gain (Loss)
Investment Company
Oppenheimer Institutional Government Money Market Fund, Cl. E	$	903,346	$	20,611	$	—	$	—

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Futures Contracts as of January 31, 2019
Description	Buy/Sell	Expiration Date		Number of Contracts		Notional Amount (000’s)		Value		Unrealized Appreciation/ (Depreciation)
United States Treasury Long Bonds	Sell		3/20/19		13		USD 1,886	$	1,906,938	$	(21,241)
United States Treasury Nts., 10 yr.	Buy		3/20/19		13		USD 1,582		1,592,094		10,196
United states Treasury Nts., 2 yr.	Buy		3/29/19		8		USD 1,695		1,698,625		3,672
										$	(7,373)

See accompanying Notes to Financial Statements.

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STATEMENT OF ASSETS AND LIABILITIESJanuary 31, 2019

Assets
Investments, at value—see accompanying statement of investments:
Unaffiliated companies (cost $95,171,258)	$	94,887,810
Affiliated companies (cost $903,346)		903,346
		95,791,156
Cash		19,854
Cash used for collateral on futures		46,100
Receivables and other assets:
Interest and dividends		164,191
Shares of beneficial interest sold		9,009
Variation margin receivable		3,981
Other		22,354
Total assets		96,056,645
Liabilities
Payables and other liabilities:
Shares of beneficial interest redeemed		57,834
Directors’ compensation		17,446
Variation margin payable		13,000
Shareholder communications		2,657
Other		48,016
Total liabilities		138,953
Net Assets —applicable to 7,900,444 shares of beneficial interest outstanding	$	95,917,692
Net Assets Value, Redemption Price and Offering Price per Share	$	12.14

See accompanying Notes to Financial Statements.

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STATEMENT

OF OPERATIONS For the Year EndedJanuary 31, 2019

Investment Income
Interest	$	4,278,709
Dividends — affiliated companies		20,611
Total investment income		4,299,320
Expenses
Management fees		609,142
Transfer and shareholder servicing agent fees		7,614
Shareholder communications		10,602
Legal, auditing and other professional fees		66,323
Directors’ compensation		9,881
Custodian fees and expenses		1,214
Other		8,148
Total expenses		712,924
Less waivers and reimbursements of expenses		(1,154)
Net expenses		711,770
Net Investment Income		3,587,550
Realized and Unrealized Gain (Loss)
Net realized gain (loss) on:
Investment transactions in unaffiliated companies		(3,016,944)
Futures contracts		76,321
Net realized loss		(2,940,623)
Net change in unrealized appreciation/(depreciation) on:
Investment transactions in unaffiliated companies		(879,011)
Futures contracts		(42,982)
Net change in unrealized appreciation/(depreciation)		(921,993)
Net Decrease in Net Assets Resulting from Operations	$	(275,066)

See accompanying Notes to Financial Statements.

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STATEMENTS OF CHANGES IN NET ASSETS

	Year Ended January 31, 2019		Year Ended January 31, 2018
Operations
Net investment income	$	3,587,550	$	3,224,874
Net realized gain (loss)		(2,940,623)		159,158
Net change in unrealized appreciation/(depreciation)		(921,993)		(1,834,742)
Net increase (decrease) in net assets resulting from operations		(275,066)		1,549,290
Beneficial Interest Transactions
Net decrease in net assets resulting from beneficial interest transactions:
Proceeds from contributions		31,432,754		8,768,088
Payments for withdrawals		(84,406,431)		(22,292,415)
		(52,973,677)		(13,524,327)
Net Assets
Total decrease		(53,248,743)		(11,975,037)
Beginning of period		149,166,435		161,141,472
End of period	$	95,917,692	$	149,166,435

See accompanying Notes to Financial Statements.

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FINANCIAL HIGHLIGHTS

	Year Ended January 31, 2019		Year Ended January 31, 2018		Year Ended January 31, 2017		Year Ended January 29, 20161		Year Ended January 30, 20151
Per Share Operating Data
Net asset value, beginning of period		$12.07		$11.95		$11.54		$11.94		$11.42
Income (loss) from investment operations:
Net investment income2		0.28		0.25		0.18		0.04		0.11
Net realized and unrealized gain (loss)		(0.21)		(0.13)		0.23		(0.44)		0.41
Total from investment operations		0.07		0.12		0.41		(0.40)		0.52
Net asset value, end of period		$12.14		$12.07		$11.95		$11.54		$11.94
Total Return, at Net Asset Value3		0.58%		1.00%		3.55%		(3.35)%		4.55%
Ratios/Supplemental Data
Net assets, end of period (in thousands)		$95,918		$149,166		$161,141		$162,818		$171,103
Average net assets (in thousands)		$152,175		$155,551		$164,817		$164,921		$162,943
Ratios to average net assets:4
Net investment income		2.36%		2.07%		1.49%		0.35%		0.97%
Total expenses5		0.47%		0.47%		0.47%		0.45%		0.44%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses		0.47%6		0.47%6		0.47%6		0.45%6		0.44%6
Portfolio turnover rate		15%		8%7		8%7		16%7		5%

1. Represents the last business day of the Fund’s reporting period.

2. Per share amounts calculated based on the average shares outstanding during the period.

3. Assumes an initial investment on the business day before the first day of the fiscal period, with all dividends and distributions reinvested in additional shares on the reinvestment date, and redemption at the net asset value calculated on the last business day of the fiscal period. Sales charges are not reflected in the total returns. Total returns are not annualized for periods less than one full year. Returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.

4. Annualized for periods less than one full year.

5. Total expenses including indirect expenses from affiliated fund fees and expenses were as follows:

Year Ended January 31, 2019	0.47	%
Year Ended January 31, 2018	0.47	%
Year Ended January 31, 2017	0.47	%
Year Ended January 29, 2016	0.45	%
Year Ended January 30, 2015	0.44	%

6. Waiver was less than 0.005%.

7. The portfolio turnover rate excludes purchase and sale transactions of To Be Announced (TBA) mortgage-related securities as follows:

	Purchase Transactions		Sale Transactions
Year Ended January 31, 2018		$1,212,413		$2,411,937
Year Ended January 31, 2017		$14,790,857		$14,790,857
Year Ended January 29, 2016		$11,356,129		$10,126,100

See accompanying Notes to Financial Statements.

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NOTES TO FINANCIAL STATEMENTSJanuary 31, 2019

1. Organization

Oppenheimer Master Inflation Protected Securities Fund, LLC (the “Fund”) is organized as a Delaware limited liability company and registered under the Investment Company Act of 1940 (“1940 Act”), as amended, as a diversified,open-end management investment company. The Fund’s investment objective is to seek total return. The Fund’s investment adviser is OFI Global Asset Management, Inc. (“OFI Global” or the “Manager”), a wholly-owned subsidiary of OppenheimerFunds, Inc. (“OFI” or the“Sub-Adviser”). The Manager has entered into asub-advisory agreement with OFI.

Shares of the Fund are issued solely in private placement transactions that do not involve any “public offering” within the meaning of Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”). Investments in the Fund may only be made by certain “accredited investors” within the meaning of Regulation D under the Securities Act, including other investment companies. The Fund currently offers one class of shares.

For federal income tax purposes, the Fund qualifies as a partnership, and each investor in the Fund is treated as the owner of its proportionate share of the net assets, income, expenses, and realized and unrealized gains and losses of the Fund. Accordingly, as a “pass-through” entity, the Fund pays no dividends or capital gain distributions.

The following is a summary of significant accounting policies followed in the Fund’s preparation of financial statements in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”).

2. Significant Accounting Policies

Security Valuation.All investments in securities are recorded at their estimated fair value, as described in Note 3.

Investment Income.Dividend income is recorded on theex-dividend date or uponex-dividend notification in the case of certain foreign dividends where theex-dividend date may have passed.Non-cash dividends included in dividend income, if any, are recorded at the fair value of the securities received. Withholding taxes on foreign dividends, if any, and capital gains taxes on foreign investments, if any, have been provided for in accordance with the Fund’s understanding of the applicable tax rules and regulations. Interest income, if any, is recognized on an accrual basis. Discount and premium, which are included in interest income on the Statement of Operations, are amortized or accreted daily.

Custodian Fees. “Custodian fees and expenses” in the Statement of Operations may include interest expense incurred by the Fund on any cash overdrafts of its custodian account during the period. Such cash overdrafts may result from the effects of failed trades in portfolio securities and from cash outflows resulting from unanticipated shareholder redemption activity. The Fund pays interest to its custodian on such cash overdraft at a rate equal to the Prime Rate plus 0.35%. The “Reduction to custodian expenses” line item, if applicable, represents earnings on cash balances maintained by the Fund during the period. Such interest expense and other custodian fees may be paid with these earnings.

16      OPPENHEIMER MASTER INFLATION PROTECTED SECURITIES FUND, LLC

2. Significant Accounting Policies (continued)

Security Transactions. Security transactions are recorded on the trade date. Realized gains and losses on securities sold are determined on the basis of identified cost.

Indemnifications.The Fund’s organizational documents provide current and former Directors 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.

Federal Taxes.The Fund, as an entity, will not be subject to U.S. federal income tax. The Fund will be treated for U.S. federal income tax purposes as a partnership, and not as an association taxable as a corporation. Therefore, a tax provision is not required. Each shareholder is required for U.S. federal income tax purposes to take into account, in its taxable year with which (or within which a taxable year of the Fund ends), its distributive share of all items of Fund income, gains, losses, and deductions for such taxable year of the Fund. A shareholder must take such items into account even if the Fund does not distribute cash or other property to such shareholder during its taxable year.

Although the Fund is treated as a partnership for Federal tax purposes, it is intended that the Fund’s assets, income and distributions will be managed in such a way that investment in the Fund would not cause an investor that is a regulated investment company under Subchapter M of the Code (“RIC”) to fail that qualification.

The Fund has analyzed its tax positions for the fiscal year ended January 31, 2019, including open tax years, and does not believe there are any uncertain tax positions requiring recognition in the Fund’s financial statements.

Use of Estimates. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates.

New Accounting Pronouncements. In March 2017, Financial Accounting Standards Board

(“FASB”) issued Accounting Standards Update (“ASU”), ASU2017-08. This provides guidance related to the amortization period for certain purchased callable debt securities held at a premium. The ASU is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. The Manager has evaluated the impacts of these changes on the financial statements and there are no material impacts.

During August 2018, the Securities and Exchange Commission (the “SEC”) issued Final Rule ReleaseNo. 33-10532 (the “Rule”), Disclosure Update and Simplification. The rule amends certain financial statement disclosure requirements to conform to U.S. GAAP. The amendments to Rule6-04.17 of RegulationS-X (balance sheet) remove the requirement to

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NOTES TO FINANCIAL STATEMENTSContinued

2. Significant Accounting Policies (continued)

separately state the book basis components of net assets: undistributed (over-distribution of) net investment income (“UNII”), accumulated undistributed net realized gains (losses), and net unrealized appreciation (depreciation) at the balance sheet date. Instead, consistent with U.S. GAAP, funds will be required to disclose total distributable earnings. The amendments to Rule6-09 of RegulationS-X (statement of changes in net assets) remove the requirement to separately state the sources of distributions paid. Instead, consistent with U.S. GAAP, funds will be required to disclose the total amount of distributions paid, except that any tax return of capital must be separately disclosed. The amendments also remove the requirement to parenthetically state the book basis amount of UNII on the statement of changes in net assets. The requirements of the Rule were effective November 5, 2018, the Fund’s Statement of Assets and Liabilities and Statement of Changes in Net Assets for the current reporting period have been modified accordingly.

3. Securities Valuation

The Fund calculates the net asset value of its shares as of 4:00 P.M. Eastern Time, on each day the New York Stock Exchange (the “Exchange” or “NYSE”) is open for trading, except in the case of a scheduled early closing of the Exchange, in which case the Fund will calculate net asset value of the shares as of the scheduled early closing time of the Exchange.

The Fund’s Board has adopted procedures for the valuation of the Fund’s securities and has delegated theday-to-day responsibility for valuation determinations under those procedures to the Manager. The Manager has established a Valuation Committee which is responsible for determining a fair valuation for any security for which market quotations are not readily available. The Valuation Committee’s fair valuation determinations are subject to review, approval and ratification by the Fund’s Board at least quarterly or more frequently, if necessary.

Valuation Methods and Inputs

Securities are valued primarily using unadjusted quoted market prices, when available, as supplied by third party pricing services or broker-dealers.

The following methodologies are used to determine the market value or the fair value of the types of securities described below:

Shares of a registered investment company that are not traded on an exchange are valued at that investment company’s net asset value per share.

Corporate and government debt securities (of U.S. or foreign issuers) and municipal debt securities, short-term notes, mortgage-backed securities, collateralized mortgage obligations, and asset-backed securities are valued at the mean between the bid and asked prices utilizing evaluated prices obtained from third party pricing services or broker-dealers who may use matrix pricing methods to determine the evaluated prices. Pricing services generally price debt securities assuming orderly transactions of an institutional “round lot” size, but some trades may occur in smaller, “odd lot” sizes, sometimes at lower prices than institutional round lot trades. Standard inputs generally considered by third-party pricing vendors include reported

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3. Securities Valuation (continued)

trade data, broker-dealer price quotations, benchmark yields, issuer spreads on comparable securities, the credit quality, yield, maturity, as well as other appropriate factors.

Futures contracts and futures options traded on a commodities or futures exchange will be valued at the final settlement price or official closing price on the principal exchange as reported by such principal exchange at its trading session ending at, or most recently prior to, the time when the Fund’s assets are valued.

Securities for which market quotations are not readily available, or when a significant event has occurred that would materially affect the value of the security, are fair valued either (i) by a standardized fair valuation methodology applicable to the security type or the significant event as previously approved by the Valuation Committee and the Fund’s Board or (ii) as determined in good faith by the Manager’s Valuation Committee. The Valuation Committee considers all relevant facts that are reasonably available, through either public information or information available to the Manager, when determining the fair value of a security. Those standardized fair valuation methodologies include, but are not limited to, valuing securities at the last sale price or initially at cost and subsequently adjusting the value based on: changes in company specific fundamentals, changes in an appropriate securities index, or changes in the value of similar securities which may be further adjusted for any discounts related to security-specific resale restrictions. When possible, such methodologies use observable market inputs such as unadjusted quoted prices of similar securities, observable interest rates, currency rates and yield curves. The methodologies used for valuing securities are not necessarily an indication of the risks associated with investing in those securities nor can it be assured that the Fund can obtain the fair value assigned to a security if it were to sell the security.

Classifications

Each investment asset or liability of the Fund is assigned a level at measurement date based on the significance and source of the inputs to its valuation. Various data inputs may be used in determining the value of each of the Fund’s investments as of the reporting period end. These data inputs are categorized in the following hierarchy under applicable financial accounting standards:

1) Level1-unadjusted quoted prices in active markets for identical assets or liabilities (including securities actively traded on a securities exchange)

2) Level2-inputs other than unadjusted quoted prices that are observable for the asset or liability (such as unadjusted quoted prices for similar assets and market corroborated inputs such as interest rates, prepayment speeds, credit risks, etc.)

3) Level3-significant unobservable inputs (including the Manager’s own judgments about assumptions that market participants would use in pricing the asset or liability).

The inputs used for valuing securities are not necessarily an indication of the risks associated with investing in those securities.

The Fund classifies each of its investments in investment companies which are publicly offered as Level 1. Investment companies that are not publicly offered, if any, are classified as

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NOTES TO FINANCIAL STATEMENTSContinued

3. Securities Valuation (continued)

Level 2 in the fair value hierarchy.

The table below categorizes amounts that are included in the Fund’s Statement of Assets and Liabilities at period end based on valuation input level:

	Level 1— Unadjusted Quoted Prices			Level 2— Other Significant Observable Inputs		Level 3— Significant Unobservable Inputs		Value
Assets Table
Investments, at Value:
Asset-Backed Securities	$	—		$	2,158,929	$	—	$	2,158,929
Mortgage-Backed Obligations		—			152,571		—		152,571
U.S. Government Obligations		—			92,576,310		—		92,576,310
Investment Company		903,346			—		—		903,346
Total Investments, at Value		903,346			94,887,810		—		95,791,156
Other Financial Instruments:
Futures contracts		13,868			—		—		13,868
Total Assets	$	917,214		$	94,887,810	$	—	$	95,805,024
Liabilities Table
Other Financial Instruments:
Futures contracts	$	(21,241	)	$	—	$	—	$	(21,241)
Total Liabilities	$	(21,241	)	$	—	$	—	$	(21,241)

Forward currency exchange contracts and futures contracts, if any, are reported at their unrealized appreciation/depreciation at measurement date, which represents the change in the contract’s value from trade date. All additional assets and liabilities included in the above table are reported at their market value at measurement date.

For the reporting period, there were no transfers between levels.

4. Investments and Risks

Investments in Affiliated Funds. The Fund is permitted to invest in other mutual funds advised by the Manager (“Affiliated Funds”). Affiliated Funds are management investment companies registered under the 1940 Act, as amended. The Manager is the investment adviser of, and theSub-Adviser provides investment and related advisory services to, the

Affiliated Funds. When applicable, the Fund’s investments in Affiliated Funds are included in the Statement of Investments. Shares of Affiliated Funds are valued at their net asset value per share. As a shareholder, the Fund is subject to its proportional share of the Affiliated Funds’ expenses, including their management fee. The Manager will waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund’s investment in the Affiliated Funds.

Each of the Affiliated Funds in which the Fund invests has its own investment risks, and those risks can affect the value of the Fund’s investments and therefore the value of the Fund’s shares. To the extent that the Fund invests more of its assets in one Affiliated Fund than in another, the Fund will have greater exposure to the risks of that Affiliated Fund.

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4. Investments and Risks (continued)

Investments in Money Market Instruments.The Fund is permitted to invest its free cash balances in money market instruments to provide liquidity or for defensive purposes. The Fund may invest in money market instruments by investing in Class E shares of Oppenheimer Institutional Government Money Market Fund (“IGMMF”), which is an Affiliated Fund. IGMMF is regulated as a money market fund under the 1940 Act, as amended. The Fund may also invest in money market instruments directly or in other affiliated or unaffiliated money market funds.

Inflation-Indexed Debt Securities.Inflation-indexed debt securities are fixed income securities that are structured to seek to provide protection against inflation. The value of the bond’s principal or the interest rate paid on the bond is adjusted to track changes in a stated inflation measure. With respect to inflation-indexed bonds whose principal is adjusted with inflation, if the index measuring inflation falls, the principal value of the inflation-indexed bonds will be adjusted downward, and consequently the interest payable on these securities (calculated with respect to smaller principal amounts) will be reduced. If the index measuring inflation rises, both the principal value and the interest payable (calculated with respect to a larger principal amount) will increase. With respect to inflation-indexed bonds whose interest rate is adjusted with inflation, instead of adjusting the bond’s principal amount, the inflation adjustment is reflected in the coupon payment. Because of this inflation adjustment feature, inflation-protected bonds typically have lower yields than conventional fixed-rate bonds with similar maturities. At period end, securities with an aggregate market value of $92,576,310, representing 96.5% of the Fund’s net assets were comprised of inflation-indexed debt securities.

Concentration Risk.Focusing on one type of investment, inflation-indexed bonds, rather than a broad spectrum of investments, makes the Fund’s share price particularly sensitive to market, economic and other events that may affect this investment type. The Fund’s investment in inflation-indexed bonds may be speculative and subject to greater price volatility than other types of investments.

Shareholder Concentration.At period end, 100% of the shares of the Fund were owned by the Manager, other funds advised orsub-advised by the Manager or an affiliate of the Manager.

5. Market Risk Factors

The Fund’s investments in securities and/or financial derivatives may expose the Fund to various market risk factors:

Commodity Risk. Commodity risk relates to the change in value of commodities or commodity indexes as they relate to increases or decreases in the commodities market. Commodities are physical assets that have tangible properties. Examples of these types of assets are crude oil, heating oil, metals, livestock, and agricultural products.

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NOTES TO FINANCIAL STATEMENTSContinued

5. Market Risk Factors (continued)

Credit Risk.Credit risk relates to the ability of the issuer of debt to meet interest and principal payments, or both, as they come due. In general, lower-grade, higher-yield debt securities are subject to credit risk to a greater extent than lower-yield, higher-quality securities.

Equity Risk. Equity risk relates to the change in value of equity securities as they relate to increases or decreases in the general market.

Foreign Exchange Rate Risk. Foreign exchange rate risk relates to the change in the U.S. dollar value of a security held that is denominated in a foreign currency. The U.S. dollar value of a foreign currency denominated security will decrease as the dollar appreciates against the currency, while the U.S. dollar value will increase as the dollar depreciates against the currency.

Interest Rate Risk.Interest rate risk refers to the fluctuations in value of fixed-income securities resulting from the inverse relationship between price and yield. For example, an increase in general interest rates will tend to reduce the market value of already issued fixed-income investments, and a decline in general interest rates will tend to increase their value. In addition, debt securities with longer maturities, which tend to have higher yields, are subject to potentially greater fluctuations in value from changes in interest rates than obligations with shorter maturities.

Volatility Risk.Volatility risk refers to the magnitude of the movement, but not the direction of the movement, in a financial instrument’s price over a defined time period. Large increases or decreases in a financial instrument’s price over a relative time period typically indicate greater volatility risk, while small increases or decreases in its price typically indicate lower volatility risk.

6. Use of Derivatives

The Fund’s investment objective not only permits the Fund to purchase investment securities, it also allows the Fund to enter into various types of derivatives contracts, including, but not limited to, futures contracts, forward currency exchange contracts, credit default swaps, interest rate swaps, total return swaps, variance swaps and purchased and written options. In doing so, the Fund will employ strategies in differing combinations to permit it to increase, decrease, or change the level or types of exposure to market risk factors. These instruments may allow the Fund to pursue its objectives more quickly and efficiently than if it were to make direct purchases or sales of securities capable of effecting a similar response to market factors. Such contracts may be entered into through a bilateralover-the-counter (“OTC”) transaction, or through a securities or futures exchange and cleared through a clearinghouse.

Derivatives may have little or no initial cash investment relative to their market value exposure and therefore can produce significant gains or losses in excess of their cost due to changes in the market risk factors and the overall market. This use of embedded leverage allows the Fund to increase its market value exposure relative to its net assets and can substantially increase the volatility of the Fund’s performance. In instances where the Fund is using derivatives to decrease, or hedge, exposures to market risk factors for securities held by

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6. Use of Derivatives (continued)

the Fund, there are also risks that those derivatives may not perform as expected resulting in losses for the combined or hedged positions. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund’s initial investment.

Additional associated risks from investing in derivatives also exist and potentially could have significant effects on the valuation of the derivative and the Fund. Typically, the associated risks are not the risks that the Fund is attempting to increase or decrease exposure to, per its investment objectives, but are the additional risks from investing in derivatives. Examples of these associated risks are liquidity risk, which is the risk that the Fund will not be able to sell the derivative in the open market in a timely manner, and counterparty credit risk, which is the risk that the counterparty will not fulfill its obligation to the Fund.

The Fund’s actual exposures to these market risk factors and associated risks during the period are discussed in further detail, by derivative type, below.

Futures Contracts

A futures contract is a commitment to buy or sell a specific amount of a commodity, financial instrument or currency at a negotiated price on a stipulated future date. The Fund may buy and sell futures contracts and may also buy or write put or call options on these futures contracts. Futures contracts and options thereon are generally entered into on a regulated futures exchange and cleared through a clearinghouse associated with the exchange.

Upon entering into a futures contract, the Fund is required to deposit either cash or securities (initial margin) in an amount equal to a certain percentage of the contract value in an account registered in the futures commission merchant’s name. Subsequent payments (variation margin) are paid to or from the futures commission merchant each day equal to the daily changes in the contract value. Such payments are recorded as unrealized gains and losses. Should the Fund fail to make requested variation margin payments, the futures commission merchant can gain access to the initial margin to satisfy the Fund’s payment obligations.

Futures contracts are reported on a schedule following the Statement of Investments. Securities held by a futures commission merchant to cover initial margin requirements on open futures contracts are noted in the Statement of Investments. Cash held by a futures commission merchant to cover initial margin requirements on open futures contracts and the receivable and/or payable for the daily mark to market for the variation margin are noted in the Statement of Assets and Liabilities. The net change in unrealized appreciation and depreciation is reported in the Statement of Operations. Realized gains (losses) are reported in the Statement of Operations at the closing or expiration of futures contracts.

The Fund may purchase and/or sell financial futures contracts and options on futures contracts to gain exposure to, or decrease exposure to interest rate risk, equity risk, foreign exchange rate risk, volatility risk, or commodity risk.

During the reporting period, the Fund had an ending monthly average market value of $2,121,488 and $631,632 on futures contracts purchased and sold, respectively.

Additional associated risks of entering into futures contracts (and related options) include the possibility that there may be an illiquid market where the Fund is unable to liquidate the

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NOTES TO FINANCIAL STATEMENTSContinued

6. Use of Derivatives (continued)

contract or enter into an offsetting position and, if used for hedging purposes, the risk that the price of the contract will correlate imperfectly with the prices of the Fund’s securities.

Counterparty Credit Risk.Derivative positions are subject to the risk that the counterparty will not fulfill its obligation to the Fund. The Fund intends to enter into derivative transactions with counterparties that the Manager believes to be creditworthy at the time of the transaction.

For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities. Bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset in bankruptcy, insolvency or other events.

The Fund’s risk of loss from counterparty credit risk on exchange-traded derivatives cleared through a clearinghouse and for centrally cleared swaps is generally considered lower than as compared to OTC derivatives. However, counterparty credit risk exists with respect to initial and variation margin deposited/paid by the Fund that is held in futures commission merchant, broker and/or clearinghouse accounts for such exchange-traded derivatives and for centrally cleared swaps.

With respect to centrally cleared swaps, such transactions will be submitted for clearing, and if cleared, will be held in accounts at futures commission merchants or brokers that are members of clearinghouses. While brokers, futures commission merchants and clearinghouses are required to segregate customer margin from their own assets, in the event that a broker, futures commission merchant or clearinghouse becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the broker, futures commission merchant or clearinghouse for all its customers, U.S. bankruptcy laws will typically allocate that shortfall on apro-rata basis across all the broker’s, futures commission merchant’s or clearinghouse’s customers, potentially resulting in losses to the Fund.

There is the risk that a broker, futures commission merchant or clearinghouse will decline to clear a transaction on the Fund’s behalf, and the Fund may be required to pay a termination fee to the executing broker with whom the Fund initially enters into the transaction. Clearinghouses may also be permitted to terminate centrally cleared swaps at any time. The Fund is also subject to the risk that the broker or futures commission merchant will improperly use the Fund’s assets deposited/paid as initial or variation margin to satisfy payment obligations of another customer. In the event of a default by another customer of the broker or futures commission merchant, the Fund might not receive its variation margin payments from the clearinghouse, due to the manner in which variation margin payments are aggregated for all customers of the broker/futures commission merchant.

Collateral and margin requirements differ by type of derivative. Margin requirements are established by the broker, futures commission merchant or clearinghouse for exchange-traded and cleared derivatives, including centrally cleared swaps. Brokers, futures commission merchants and clearinghouses can ask for margin in excess of the regulatory minimum, or increase the margin amount, in certain circumstances.

For financial reporting purposes, cash collateral that has been pledged to cover obligations

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6. Use of Derivatives (continued)

of the Fund, if any, is reported separately on the Statement of Assets and Liabilities as cash pledged as collateral.Non-cash collateral pledged by the Fund, if any, is noted in the Statement of Investments. Generally, the amount of collateral due from or to a party must exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance.

The following table presents the valuations of derivative instruments by risk exposure as reported within the Statement of Assets and Liabilities at period end:

	Asset Derivatives				Liability Derivatives
Derivatives Not Accounted for as Hedging Instruments	Statement of Assets and Liabilities Location	Value			Statement of Assets and Liabilities Location		Value
Interest rate contracts Variation margin receivable		$	3,981	*		Variation margin payable	$	13,000*

*Includes only the current day’s variation margin. Prior variation margin movements have been reflected in cash on the Statement of Assets and Liabilities upon receipt or payment.

The effect of derivative instruments on the Statement of Operations is as follows:

Amount of Realized Gain or (Loss) Recognized on Derivatives
Derivatives Not Accounted for as Hedging Instruments	Futures contracts
Interest rate contracts	$                  76,321
Amount of Change in Unrealized Gain or (Loss) Recognized on Derivatives
Derivatives Not Accounted for as Hedging Instruments	Futures contracts
Interest rate contracts	$                (42,982)

7. Shares of Beneficial Interest

The Fund has authorized an unlimited number of $0.001 par value shares of beneficial interest. Transactions in shares of beneficial interest were as follows:

	Year Ended January 31, 2019						Year Ended January 31, 2018
	Shares			Amount			Shares			Amount
Contributions		2,621,590		$	31,432,754			728,507		$	8,768,088
Withdrawals		(7,082,541	)		(84,406,431	)		(1,852,315	)		(22,292,415)
Net decrease		(4,460,951	)	$	(52,973,677	)		(1,123,808	)	$	(13,524,327)

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NOTES TO FINANCIAL STATEMENTSContinued

8. Purchases and Sales of Securities

The aggregate cost of purchases and proceeds from sales of securities, other than short-term obligations and investments in IGMMF, for the reporting period were as follows:

	Purchases		Sales
Investment securities	$	1,913,464	$	2,041,652
U.S. government and government agency obligations		21,080,838		73,835,659

9. Fees and Other Transactions with Affiliates

Management Fees.Under the investment advisory agreement, the Fund pays the Manager a management fee based on the daily net assets of the Fund at an annual rate as shown in the following table:

Fee Schedule
Up to $1 billion	0.40%
Over $1 billion	0.35

The Fund’s effective management fee for the reporting period was 0.40% of average annual net assets before any applicable waivers.

Sub-Adviser Fees.The Manager has retained theSub-Adviser to provide theday-to-day portfolio management of the Fund. Under theSub-Advisory Agreement, the Manager pays theSub-Adviser an annual fee in monthly installments, equal to a percentage of the investment management fee collected by the Manager from the Fund, which shall be calculated after any investment management fee waivers. The fee paid to theSub-Adviser is paid by the Manager, not by the Fund.

Transfer Agent Fees.OFI Global (the “Transfer Agent”) serves as the transfer and shareholder servicing agent for the Fund. The Fund pays the Transfer Agent a fee based on annual net assets, which shall be calculated after any applicable fee waivers. Fees incurred and average net assets with respect to these services are detailed in the Statement of Operations and Financial Highlights, respectively.

Sub-Transfer Agent Fees.The Transfer Agent has retained Shareholder Services, Inc., a wholly-owned subsidiary of OFI (the“Sub-Transfer Agent”), to provide theday-to-day transfer agent and shareholder servicing of the Fund. Under theSub-Transfer Agency Agreement, the Transfer Agent pays theSub-Transfer Agent an annual fee in monthly installments, equal to a percentage of the transfer agent fee collected by the Transfer Agent from the Fund, which shall be calculated after any applicable fee waivers. The fee paid to theSub-Transfer Agent is paid by the Transfer Agent, not by the Fund.

Directors’ Compensation. The Fund’s Board of Directors (“Board”) has adopted a compensation deferral plan for Independent Directors that enables Directors to elect to defer receipt of all or a portion of the annual compensation they are entitled to receive from the Fund. For purposes of determining the amount owed to the Directors under the plan, deferred

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9. Fees and Other Transactions with Affiliates (continued)

amounts are treated as though equal dollar amounts had been invested in shares of the Fund or in other Oppenheimer funds selected by the Directors. The Fund purchases shares of the funds selected for deferral by the Directors in amounts equal to his or her deemed investment, resulting in a Fund asset equal to the deferred compensation liability. Such assets are included as a component of “Other” within the asset section of the Statement of Assets and Liabilities. Deferral of Directors’ fees under the plan will not affect the net assets of the Fund and will not materially affect the Fund’s assets, liabilities or net investment income per share. Amounts will be deferred until distributed in accordance with the compensation deferral plan.

Waivers and Reimbursements of Expenses.The Manager will waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund’s investment in IGMMF. During the reporting period, the Manager waived fees and/or reimbursed the Fund $1,154 for IGMMF management fees.

10. Pending Acquisition

On October 18, 2018, Massachusetts Mutual Life Insurance Company, an indirect corporate parent of theSub-Adviser and the Manager, announced that it has entered into an agreement whereby Invesco Ltd. (“Invesco”), a global investment management company, will acquire theSub-Adviser (the “Transaction”). In connection with the Transaction, on January 11, 2019, the Fund’s Board unanimously approved an Agreement and Plan of Reorganization (the “Agreement”), which provides for the transfer of the assets and liabilities of the Fund to a corresponding, newly formed fund (the “Acquiring Fund”) in the Invesco family of funds (the “Reorganization”) in exchange for shares of the corresponding Acquiring Fund of equal value to the value of the shares of the Fund as of the close of business on the closing date. Although the Acquiring Fund will be managed by Invesco Advisers, Inc., the Acquiring Fund will, as of the closing date, have the same investment objective and substantially similar principal investment strategies and risks as the Fund. After the Reorganization, Invesco Advisers, Inc. will be the investment adviser to the Acquiring Fund, and the Fund will be liquidated and dissolved under applicable law and terminate its registration under the Investment Company Act of 1940, as amended. The Reorganization is expected to be atax-free reorganization for U.S. federal income tax purposes.

The Reorganization is subject to the approval of shareholders of the Fund. Shareholders of record of the Fund on January 14, 2019 will be entitled to vote on the Reorganization and will receive a combined prospectus and proxy statement describing the Reorganization, the shareholder meeting, and a discussion of the factors the Fund’s Board considered in approving the Agreement. The combined prospectus and proxy statement is expected to be distributed to shareholders of record on or about February 28, 2019. The anticipated date of the shareholder meeting is on or about April 12, 2019.

If shareholders approve the Agreement and certain other closing conditions are satisfied or waived, the Reorganization is expected to close during the second quarter of 2019, or as soon as practicable thereafter. This is subject to change.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors

Oppenheimer Master Inflation Protected Securities Fund, LLC:

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities of Oppenheimer Master Inflation Protected Securities Fund, LLC (the “Fund”), including the statement of investments, as of January 31, 2019, the related statement of operations for the year then ended, the statements of changes in net assets for each of the years in thetwo-year period then ended, and the related notes (collectively, the “financial statements”) and the financial highlights for each of the years in the five-year period then ended. In our opinion, the financial statements and financial highlights present fairly, in all material respects, the financial position of the Fund as of January 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the years in thetwo-year period then ended, and the financial highlights for each of the years in the five-year period then ended, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements and financial highlights are the responsibility of the Fund’s management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements and financial highlights, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements and financial highlights. Such procedures also included confirmation of securities owned as of January 31, 2019, by correspondence with the custodian, brokers and the transfer agent, or by other appropriate auditing procedures. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements and financial highlights. We believe that our audits provide a reasonable basis for our opinion.

KPMGLLP

We have not been able to determine the specific year that we began serving as the auditor of one or more Oppenheimer Funds investment companies, however we are aware that we have served as the auditor of one or more Oppenheimer Funds investment companies since at least 1969.

Denver, Colorado

March 25, 2019

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BOARD APPROVAL OF THE FUND’S INVESTMENT ADVISORY

ANDSUB-ADVISORY AGREEMENTSUnaudited

The Fund has entered into an investment advisory agreement with OFI Global Asset Management, Inc. (“OFI Global” or the “Adviser”), a wholly-owned subsidiary of OppenheimerFunds, Inc. (“OFI” or the“Sub-Adviser”) (“OFI Global” and “OFI” together the “Managers”) and OFI Global has entered into asub-advisory agreement with OFI whereby OFI provides investmentsub-advisory services to the Fund (collectively, the “Agreements”). Each year, the Board of Directors (the “Board”), including a majority of the independent Directors, is required to determine whether to approve the terms of the Agreements and the renewal thereof. The Investment Company Act of 1940, as amended, requires that the Board request and evaluate, and that the Managers provide, such information as may be reasonably necessary to evaluate the terms of the Agreements. The Board employs an independent consultant to prepare a report that provides information, including comparative information that the Board requests for that purpose. In addition toin-person meetings focused on this evaluation, the Board receives information throughout the year regarding Fund services, fees, expenses and performance.

The Managers and the independent consultant provided information to the Board on the following factors: (i) the nature, quality and extent of the Managers’ services, (ii) the comparative investment performance of the Fund and the Managers, (iii) the fees and expenses of the Fund, including comparative fee and expense information, (iv) the profitability of the Managers and their affiliates, including an analysis of the cost of providing services, (v) whether economies of scale are realized as the Fund grows and whether fee levels reflect these economies of scale for Fund investors and (vi) other benefits to the Managers from their relationship with the Fund. The Board was aware that there are alternatives to retaining the Managers.

Outlined below is a summary of the principal information considered by the Board as well as the Board’s conclusions.

Nature, Quality and Extent of Services. The Board considered information about the nature, quality and extent of the services provided to the Fund and information regarding the Managers’ key personnel who provide such services. The Managers’ duties include providing the Fund with the services of theSub-Adviser’s portfolio manager and investment team, who provide research, analysis and other advisory services in regard to the Fund’s investments; and securities trading services. OFI Global is responsible for oversight of third-party service providers; monitoring compliance with applicable Fund policies and procedures and adherence to the Fund’s investment restrictions; risk management; and oversight of theSub-Adviser. OFI Global is also responsible for providing certain administrative services to the Fund. Those services include providing and supervising all administrative and clerical personnel who are necessary in order to provide effective corporate administration for the Fund; compiling and maintaining records with respect to the Fund’s operations; preparing and filing reports required by the U.S. Securities and Exchange Commission; preparing periodic reports regarding the operations of the Fund for its shareholders; preparing proxy materials for shareholder meetings; and preparing the registration statements required by federal and state securities laws for the sale of the Fund’s shares. OFI Global also provides the Fund with office space, facilities and equipment.

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BOARD APPROVAL OF THE FUND’S INVESTMENT ADVISORY

ANDSUB-ADVISORY AGREEMENTSUnaudited / Continued

The Board also considered the quality of the services provided and the quality of the Managers’ resources that are available to the Fund. The Board took account of the fact that theSub-Adviser has over fifty years of experience as an investment adviser and that its assets under management rank it among the top mutual fund managers in the United States. The Board evaluated the Managers’ advisory, administrative, accounting, legal, compliance and risk management services, among other services, and information the Board has received regarding the experience and professional qualifications of the Managers’ key personnel and the size and functions of their staff. In its evaluation of the quality of the portfolio management services provided, the Board considered the experience ofYoung-Sup Lee the portfolio manager for the Fund, and theSub-Adviser’s investment team and analysts. The Board members also considered the totality of their experiences with the Managers as directors or trustees of the Fund and other funds advised by the Managers. The Board considered information regarding the quality of services provided by affiliates of the Managers, which the Board members have become knowledgeable about through their experiences with the Managers and in connection with the review or renewal of the Fund’s service agreements or service providers. The Board concluded, in light of the Managers’ experience, reputation, personnel, operations and resources that the Fund benefits from the services provided under the Agreements.

Investment Performance of the Managers and the Fund. Throughout the year, the Managers provided information on the investment performance of the Fund, the Adviser and theSub-Adviser, including comparative performance information. The Board also reviewed information, prepared by the Managers and by the independent consultant, comparing the Fund’s historical performance to relevant market indices and to the performance of other institutional inflation-protected bond funds. The Board noted that the Fund performed generally in line with its category median during theone- and five-year periods, ranking in the 54th and 49th percentiles, respectively, though it underperformed its category median during the three-year period. The Board further noted the Managers’ assertion that the category is characterized by tight return dispersion and that despite the Fund’s quintile rankings, its performance is generally in line with that of its competitors.

Fees and Expenses of the Fund. The Board reviewed the fees paid to the Adviser and the other expenses borne by the Fund. The Board noted that the Adviser, not the Fund, pays theSub-Adviser’s fee under thesub-advisory agreement. The independent consultant provided comparative data in regard to the fees and expenses of the Fund and other institutional inflation-protected bond funds with comparable asset levels and distribution features. The Board noted that the Fund’s contractual management fee was equal to its peer group median and lower than its category median, while its total expenses were equal to its category median and higher than its peer group median. The Board further noted that the Adviser has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the management fees incurred indirectly through the Fund’s investment in funds managed by the Adviser or its affiliates.

Economies of Scale and Profits Realized by the Managers. The Board considered information regarding the Managers’ costs in serving as the Fund’s investment adviser andsub-adviser, including the costs associated with the personnel and systems necessary

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to manage the Fund and information regarding the Managers’ profitability from their relationship with the Fund. The Board also considered that the Managers must be able to pay and retain experienced professional personnel at competitive rates to provide quality services to the Fund. The Board reviewed whether the Managers realize economies of scale in managing and supporting the Fund. The Board noted that the Fund currently has management fee breakpoints, which are intended to share with Fund shareholders economies of scale that may exist as the Fund’s assets grow.

Other Benefits to the Managers. In addition to considering the profits realized by the Managers, the Board considered information that was provided regarding the direct and indirect benefits the Managers receive as a result of their relationship with the Fund, including compensation paid to the Managers’ affiliates.

Conclusions. These factors were also considered by the independent Directors meeting separately from the full Board, assisted by experienced counsel to the Fund and to the independent Directors. Fund counsel and the independent Directors’ counsel are independent of the Managers within the meaning and intent of the Securities and Exchange Commission Rules.

Based on its review of the information it received and its evaluations described above, the Board, including a majority of the independent Directors, decided to continue the Agreements through August 31, 2019. In arriving at its decision, the Board did not identify any factor or factors as being more important than others, but considered all of the above information, and considered the terms and conditions of the Agreements, including the management fees, in light of all the surrounding circumstances.

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PORTFOLIO PROXY VOTING POLICIES AND GUIDELINES;

UPDATES TO STATEMENT OF INVESTMENTSUnaudited

The Fund has adopted Portfolio Proxy Voting Policies and Guidelines under which the Fund votes proxies relating to securities (“portfolio proxies”) held by the Fund. A description of the Fund’s Portfolio Proxy Voting Policies and Guidelines is available (i) without charge, upon request, by calling the Fund toll-free at 1.800.CALL OPP (225.5677), (ii) on the Fund’s website at www.oppenheimerfunds.com, and (iii) on the SEC’s website at www.sec.gov. In addition, the Fund is required to file FormN-PX, with its complete proxy voting record for the 12 months ended June 30th, no later than August 31st of each year. The Fund’s voting record is available (i) without charge, upon request, by calling the Fund toll-free at 1.800.CALL OPP (225.5677), and (ii) in the FormN-PX filing on the SEC’s website at www.sec.gov.

The Fund files its complete schedule of portfolio holdings with the SEC for the first quarter and the third quarter of each fiscal year on FormN-Q. The Fund’s FormN-Q filings are available on the SEC’s website at www.sec.gov. Beginning in April 2019, the Fund will no longer file FormN-Qs and will instead disclose its portfolio holdings monthly on FormN-PORT, which will also be available on the SEC’s website at www.sec.gov.

Householding—Delivery of Shareholder Documents

This is to inform you about OppenheimerFunds’ “householding” policy. If more than one member of your household maintains an account in a particular fund, OppenheimerFunds will mail only one copy of the fund’s prospectus (or, if available, the fund’s summary prospectus), annual and semiannual report and privacy policy. The consolidation of these mailings, called householding, benefits your fund through reduced mailing expense, and benefits you by reducing the volume of mail you receive from OppenheimerFunds. Householding does not affect the delivery of your account statements.

Please note that we will continue to household these mailings for as long as you remain an OppenheimerFunds shareholder, unless you request otherwise. If you prefer to receive multiple copies of these materials, please call us at1.800.CALL-OPP(225-5677).You may also notify us in writing or via email. We will begin sending you individual copies of the prospectus (or, if available, the summary prospectus), reports and privacy policy within 30 days of receiving your request to stop householding.

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DIRECTORS AND OFFICERS    Unaudited

Name, Position(s) Held with the Fund, Length of Service, Year of Birth	Principal Occupation(s) During the Past 5 Years; Other Trusteeships/ Directorships Held; Number of Portfolios in the Fund Complex Currently Overseen
INDEPENDENT DIRECTORS	The address of each Director in the chart below is 6803 S. Tucson Way, Centennial, Colorado 80112-3924. Each Director serves for an indefinite term, or until his or her resignation, retirement, death or removal. Each of the Directors in the chart below oversees 58 portfolios in the OppenheimerFunds complex.
Robert J. Malone, Chairman of the Board of Directors (since 2016), Director (since 2002) Year of Birth: 1944	Chairman - Colorado Market of MidFirst Bank (since January 2015); Chairman of the Board (2012-2016) and Director (August 2005-January 2016) of Jones International University (educational organization); Trustee of the Gallagher Family Foundation(non-profit organization) (2000-2016); Chairman, Chief Executive Officer and Director of Steele Street Bank Trust (commercial banking) (August 2003-January 2015); Director of Opera Colorado Foundation(non-profit organization) (2008-2012); Director of Colorado UpLIFT (charitable organization) (1986-2010); Director of Jones Knowledge, Inc. (2006-2010); Former Chairman of U.S. Bank-Colorado (subsidiary of U.S. Bancorp and formerly Colorado National Bank) (July 1996-April 1999); Director of Commercial Assets, Inc. (real estate investment trust) (1993-2000); Director of U.S. Exploration, Inc. (oil and gas exploration) (1997-February 2004); Chairman of the Board (1991-1994) and Trustee (1985-1994) of Regis University; and Chairman of the Board (1990-1991) and Member (1984-1999) of Young Presidents Organization. Mr. Malone has served on the Boards of certain Oppenheimer funds since 2002, during which time he has become familiar with the Fund’s (and other Oppenheimer funds’) financial, accounting, regulatory and investment matters and has contributed to the Board’s deliberations.
Andrew J. Donohue, Director (since 2017) Year of Birth: 1950	Director, Mutual Fund Directors Forum (since February 2018); Of Counsel, Shearman & Sterling LLP (since September 2017); Chief of Staff of the U.S. Securities and Exchange Commission (regulator) (June 2015-February 2017); Managing Director and Investment Company General Counsel of Goldman Sachs (investment bank) (November2012-May 2015); Partner at Morgan Lewis & Bockius, LLP (law firm) (March 2011-October 2012); Director of the Division of Investment Management of U.S. Securities and Exchange Commission (regulator) (May 2006-November 2010); Global General Counsel of Merrill Lynch Investment Managers (investment firm) (May2003-May 2006); General Counsel (October 1991-November 2001) and Executive Vice President (January 1993-November 2001) of OppenheimerFunds, Inc. (investment firm) (June 1991-November 2001). Mr. Donohue has served on the Boards of certain Oppenheimer funds since 2017, during which time he has become familiar with the Fund’s (and other Oppenheimer funds’) financial, accounting, regulatory and investment matters and has contributed to the Board’s deliberations.
Richard F. Grabish, Director (since 2010) Year of Birth: 1948	Formerly Senior Vice President and Assistant Director of Sales and Marketing (March 1997-December 2007), Director (March 1987-December 2007) and Manager of Private Client Services (June 1985-June 2005) of A.G. Edwards & Sons, Inc. (broker/dealer and investment firm); Chairman and Chief Executive Officer of A.G. Edwards Trust Company, FSB (March 2001-December 2007); President and Vice Chairman of A.G. Edwards Trust Company, FSB (investment adviser) (April 1987-March 2001); President of A.G. Edwards Trust Company, FSB (investment adviser) (June 2005-December 2007). Mr. Grabish has served on the Boards of certain Oppenheimer funds since 2001, during which time he has become familiar with the Fund’s (and other Oppenheimer funds’) financial, accounting, regulatory and investment matters and has contributed to the Board’s deliberations.

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DIRECTORS AND OFFICERS^{Unaudited / Continued}

Beverly L. Hamilton, Director (since 2010) Year of Birth: 1946	Trustee of Monterey Institute for International Studies (educational organization) (2000-2014); Board Member of Middlebury College (educational organization) (December 2005-June 2011); Director of the Board (1991-2016), Vice Chairman of the Board (2006-2009) and Chairman of the Board (2010-2013) of American Funds’ Emerging Markets Growth Fund, Inc. (mutual fund); Director of The California Endowment (philanthropic organization) (April 2002-April 2008); Director (February 2002-2005) and Chairman of Trustees (2006-2007) of the Community Hospital of Monterey Peninsula; President of ARCO Investment Management Company (February 1991-April 2000); Member of the investment committees of The Rockefeller Foundation (2001-2006) and The University of Michigan (since 2000); Advisor at Credit Suisse First Boston’s Sprout venture capital unit (venture capital fund) (1994-January 2005); Trustee of MassMutual Institutional Funds (investment company) (1996-June 2004); Trustee of MML Series Investment Fund (investment company) (April 1989-June 2004); Member of the investment committee of Hartford Hospital (2000-2003); and Advisor to Unilever (Holland) pension fund (2000-2003). Ms. Hamilton has served on the Boards of certain Oppenheimer funds since 2002, during which time she has become familiar with the Fund’s (and other Oppenheimer funds’) financial, accounting, regulatory and investment matters and has contributed to the Board’s deliberations.
Victoria J. Herget, Director (since 2012) Year of Birth:1951	Board Chair (2008-2015) and Director (2004-Present) of United Educators (insurance company); Trustee (since 2000) and Chair (2010-2017) of Newberry Library (independent research library); Trustee, Mather LifeWays (senior living organization) (since 2001); Independent Director of the First American Funds (mutual fund family) (2003-2011 and July 2018-January 2019); former Managing Director (1993-2001), Principal (1985-1993), Vice President (1978-1985) and Assistant Vice President (1973-1978) of Zurich Scudder Investments (investment adviser) (and its predecessor firms); Trustee (1992-2007), Chair of the Board of Trustees (1999-2007), Investment Committee Chair (1994-1999) and Investment Committee member (2007-2010) of Wellesley College; Trustee, BoardSource(non-profit organization) (2006-2009) and Chicago City Day School(K-8 School) (1994-2005). Ms. Herget has served on the Boards of certain Oppenheimer funds since 2012, during which time she has become familiar with the Fund’s (and other Oppenheimer funds’) financial, accounting, regulatory and investment matters and has contributed to the Board’s deliberations.
Karen L. Stuckey, Director (since 2012) Year of Birth: 1953	Member (since May 2015) of Desert Mountain Community Foundation Advisory Board(non-profit organization); Partner (1990-2012) of PricewaterhouseCoopers LLP (professional services firm) (held various positions 1975-1990); Trustee (1992-2006); member of Executive, Nominating and Audit Committees and Chair of Finance Committee (1992-2006), and Emeritus Trustee (since 2006) of Lehigh University; member, Women’s Investment Management Forum (professional organization) (since inception); and Trustee of Jennies School for Little Children(non-profit) (2011-2014). Ms. Stuckey has served on the Boards of certain Oppenheimer funds since 2012, during which time she has become familiar with the Fund’s (and other Oppenheimer funds’) financial, accounting, regulatory and investment matters and has contributed to the Board’s deliberations.

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James D. Vaughn, Director (since 2012) Year of Birth: 1945	Retired; former managing partner (1994-2001) of Denver office of Deloitte & Touche LLP, (held various positions in Denver and New York offices from 1969- 1993); Trustee and Chairman of the Audit Committee of Schroder Funds (2003- 2012); Board member and Chairman of Audit Committee of AMG National Trust Bank (since 2005); Trustee and Investment Committee member, University of South Dakota Foundation (since 1996); Board member, Audit Committee Member and past Board Chair, Junior Achievement (since 1993); former Board member, Mile High United Way, Boys and Girls Clubs, Boy Scouts, Colorado Business Committee for the Arts, Economic Club of Colorado and Metro Denver Network. Mr. Vaughn has served on the Boards of certain Oppenheimer funds since 2012, during which time he has become familiar with the Fund’s (and other Oppenheimer funds’) financial, accounting, regulatory and investment matters and has contributed to the Board’s deliberations.
INTERESTED DIRECTOR AND OFFICER	Mr. Steinmetz is an “Interested Director” because he is affiliated with the Manager and theSub-Adviser by virtue of his positions as Chairman and director of theSub-Adviser and officer and director of the Manager. Both as a Director and as an officer, Mr. Steinmetz serves for an indefinite term, or until his resignation, retirement, death or removal. Mr. Steinmetz’s address is 225 Liberty Street, New York, New York 10281-1008. Mr. Steinmetz is an officer of 104 portfolios in the OppenheimerFunds complex.
Arthur P. Steinmetz, Director (since 2015), President and Principal Executive Officer (since 2014) Year of Birth: 1958	Chairman of OppenheimerFunds, Inc. (since January 2015); CEO and Chairman of OFI Global Asset Management, Inc. (since July 2014), President of OFI Global Asset Management, Inc. (since May 2013), a Director of OFI Global Asset Management, Inc. (since January 2013), Director of OppenheimerFunds, Inc. (since July 2014), President, Management Director and CEO of Oppenheimer Acquisition Corp. (OppenheimerFunds, Inc.‘s parent holding company) (since July 2014), and President and Director of OFI SteelPath, Inc. (since January 2013). Chief Investment Officer of the OppenheimerFunds advisory entities (January 2013-December 2013); Executive Vice President of OFI Global Asset Management, Inc. (January2013-May 2013); Chief Investment Officer of OppenheimerFunds, Inc. (October 2010-December 2012); Chief Investment Officer, Fixed-Income, of OppenheimerFunds, Inc. (April 2009-October 2010); Executive Vice President of OppenheimerFunds, Inc. (October 2009-December 2012); Director of Fixed Income of OppenheimerFunds, Inc. (January 2009-April 2009); and a Senior Vice President of OppenheimerFunds, Inc. (March 1993-September 2009).
OTHER OFFICERS OF THE FUND	The addresses of the Officers in the chart below are as follows: for Messrs. Lee, Mss. Lo Bessette, Foxson and Picciotto, 225 Liberty Street, New York, New York 10281-1008, for Mr. Petersen, 6803 S. Tucson Way, Centennial, Colorado 80112-3924. Each Officer serves for an indefinite term or until his or her resignation, retirement, death or removal.
Young-Sup Lee, Vice President (since 2014) Year of Birth: 1964	Senior Vice President of theSub-Adviser (since January 2016); Vice President and Senior Research Analyst of theSub-Adviser (April 2009-January 2016); Director, Fixed Income Research (since January 2016) andco-Team Leader for the Sub- Adviser’s Investment Grade Fixed Income Team (since January 2014). A member of theSub-Adviser’s Investment Grade Fixed Income Team (April 2009-January 2014). Vice President and quantitative research analyst for the fixed income credit strategy team at Morgan Stanley (July 1996-July 2008).

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DIRECTORS AND OFFICERS Unaudited / Continued

Cynthia Lo Bessette, Secretary and Chief Legal Officer (since 2016) Year of Birth: 1969	Executive Vice President, General Counsel and Secretary of OFI Global Asset Management, Inc. (since February 2016); Senior Vice President and Deputy General Counsel of OFI Global Asset Management, Inc. (March 2015-February 2016); Chief Legal Officer of OppenheimerFunds, Inc. and OppenheimerFunds Distributor, Inc. (since February 2016); Vice President, General Counsel and Secretary of Oppenheimer Acquisition Corp. (since February 2016); General Counsel of OFI SteelPath, Inc., OFI Advisors, LLC and Index Management Solutions, LLC (since February 2016); Chief Legal Officer of OFI Global Institutional, Inc., HarbourView Asset Management Corporation, OFI Global Trust Company, Oppenheimer Real Asset Management, Inc., OFI Private Investments Inc., Shareholder Services, Inc. and Trinity Investment Management Corporation (since February 2016); Corporate Counsel (February 2012-March 2015) and Deputy Chief Legal Officer (April 2013-March 2015) of Jennison Associates LLC; Assistant General Counsel (April 2008-September 2009) and Deputy General Counsel (October 2009-February 2012) of Lord Abbett & Co. LLC.
Jennifer Foxson, Vice President and Chief Business Officer (since 2014) Year of Birth: 1969	Senior Vice President of OppenheimerFunds Distributor, Inc. (since June 2014); Vice President of OppenheimerFunds Distributor, Inc. (April 2006-June 2014); Vice President of OppenheimerFunds, Inc. (January 1998-March 2006); Assistant Vice President of OppenheimerFunds, Inc. (October 1991-December 1998).
Mary Ann Picciotto, Chief Compliance Officer and Chief Anti-Money Laundering Officer (since 2014) Year of Birth: 1973	Senior Vice President and Chief Compliance Officer of OFI Global Asset Management, Inc. (since March 2014); Chief Compliance Officer of OppenheimerFunds, Inc., OFI SteelPath, Inc., OFI Global Institutional, Inc., Oppenheimer Real Asset Management, Inc., OFI Private Investments Inc., Harborview Asset Management Corporation, Trinity Investment Management Corporation, and Shareholder Services, Inc. (since March 2014); Managing Director of Morgan Stanley Investment Management Inc. and certain of its various affiliated entities; Chief Compliance Officer of various Morgan Stanley Funds (May 2010-January 2014); Chief Compliance Officer of Morgan Stanley Investment Management Inc. (April 2007-January 2014).
Brian S. Petersen, Treasurer and Principal Financial & Accounting Officer (since 2016) Year of Birth: 1970	Senior Vice President of OFI Global Asset Management, Inc. (since January 2017); Vice President of OFI Global Asset Management, Inc. (January 2013-January 2017); Vice President of OppenheimerFunds, Inc. (February 2007-December 2012); Assistant Vice President of OppenheimerFunds, Inc. (August 2002-2007).

The Fund’s Statement of Additional Information contains additional information about the Fund’s Directors and Officers and is available without charge upon request by calling 1.800.CALL OPP (225.5677).

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OPPENHEIMER MASTER INFLATION PROTECTED SECURITIES FUND, LLC

Manager	OFI Global Asset Management, Inc.
Sub-Adviser	OppenheimerFunds, Inc.
Distributor	OppenheimerFunds Distributor, Inc.
Transfer and Shareholder Servicing Agent	OFI Global Asset Management, Inc.
Sub-Transfer Agent	Shareholder Services, Inc. DBA OppenheimerFunds Services
Independent Registered Public Accounting Firm	KPMG LLP
Counsel	Ropes & Gray LLP

^© 2019 OppenheimerFunds, Inc. All rights reserved.

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	Visit us at oppenheimerfunds.com for24-hr access to account information and transactions or call us at 800.CALL OPP (800.225.5677) for24-hr automated information and automated transactions. Representatives also available Mon–Fri8am-8pm ET.
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	Oppenheimer funds are distributed by OppenheimerFunds Distributor, Inc. 225 Liberty Street, New York, NY 10281-1008 © 2019 OppenheimerFunds Distributor, Inc. All rights reserved.
	RA2000.001.0119 March 25, 2019

Item 2.  Code of Ethics.

The registrant has adopted a code of ethics that applies to the registrant’s principal executive officer, principal financial officer, principal accounting officer or controller or persons performing similar functions.

Item 3.  Audit Committee Financial Expert.

The Board of Directors of the registrant has determined that Karen L. Stuckey, the Chairwoman of the Board’s Audit Committee, is the audit committee financial expert and that Ms. Stuckey is “independent” for purposes of this Item 3.

Item 4.  Principal Accountant Fees and Services.

(a) Audit Fees

The principal accountant for the audit of the registrant’s annual financial statements billed $39,570 in fiscal 2019 and $38,600 in fiscal 2018.

(b) Audit-Related Fees

The principal accountant for the audit of the registrant’s annual financial statements billed $5,834 in fiscal 2019 and $3,500 in fiscal 2018.

The principal accountant for the audit of the registrant’s annual financial statements billed $297,836 in fiscal 2019 and $386,986 in fiscal 2018 to the registrant’s investment adviser or any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant.

Such services include: Internal control reviews, GIPS attestation procedures, custody audits, incremental, and additional, audit services.

(c) Tax Fees

The principal accountant for the audit of the registrant’s annual financial statements billed no such fees in fiscal 2019 and no such fees in fiscal 2018.

The principal accountant for the audit of the registrant’s annual financial statements billed $534,826 in fiscal 2019 and $591,136 in fiscal 2018 to the registrant’s investment adviser or any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant.

Such services include: tax compliance, tax planning and tax advice. Tax compliance generally involves preparation of original and amended tax returns, claims for a refund and tax payment-planning services. Tax planning and tax advice includes assistance with tax audits and appeals, tax advice related to mergers and acquisitions and requests for rulings or technical advice from taxing authorities.

(d) All Other Fees

The principal accountant for the audit of the registrant’s annual financial statements billed no such fees in fiscal 2019 and no such fees in fiscal 2018.

The principal accountant for the audit of the registrant’s annual financial statements billed no such fees in fiscal 2019 and no such fees in fiscal 2018 to the registrant’s investment adviser or any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant.

Such fees would include the cost to the principal accountant of attending audit committee meetings and consultations regarding the registrant’s retirement plan with respect to its Directors.

(e) (1) During its regularly scheduled periodic meetings, the registrant’s audit committee willpre-approve all audit, audit-related, tax and other services to be provided by the principal accountants of the registrant.

The audit committee has delegatedpre-approval authority to its Chairman for any subsequent new engagements that arise between regularly scheduled meeting dates provided that any fees suchpre-approved are presented to the audit committee at its next regularly scheduled meeting.

Under applicable laws,pre-approval ofnon-audit services may be waived provided that: 1) the aggregate amount of all such services provided constitutes no more than five percent of the total amount of fees paid by the registrant to its principal accountant during the fiscal year in which services are provided 2) such services were not recognized by the registrant at the time of engagement asnon-audit services and 3) such services are promptly brought to the attention of the audit committee of the registrant and approved prior to the completion of the audit.

(2) 0%

(f) Not applicable as less than 50%.

(g) The principal accountant for the audit of the registrant’s annual financial statements billed $838,496 in fiscal 2019 and $981,622 in fiscal 2018 to the registrant and the registrant’s investment adviser or any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant related tonon-audit fees. Those billings did not include any prohibitednon-audit services as defined by the Securities Exchange Act of 1934.

(h) The registrant’s audit committee of the board of Directors has considered whether the provision ofnon-audit services that were rendered to the registrant’s investment adviser, and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were notpre-approved pursuant to paragraph (c)(7)(ii) of Rule2-01 of RegulationS-X is compatible with maintaining the principal accountant’s independence. No such services were rendered.

Item 5.  Audit Committee of Listed Registrants

Not applicable.

Item 6.  Schedule of Investments.

a) Not applicable. The complete schedule of investments is included in Item 1 of this FormN-CSR.

b) Not applicable.

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

Not applicable.

Item 8.  Portfolio Managers ofClosed-End Management Investment Companies.

Not applicable.

Item 9.  Purchases of Equity Securities byClosed-End Management Investment Company and Affiliated Purchasers.

Not applicable.

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

The Fund’s Governance Committee Provisions with Respect to Nominations of Directors/Trustees to the Respective Boards

None

Item 11.  Controls and Procedures.

Based on their evaluation of the registrant’s disclosure controls and procedures (as defined in rule30a-3(c) under the Investment Company Act of 1940 (17 CFR270.30a-3(c)) as of 1/31/2019, the registrant’s principal executive officer and principal financial officer found the registrant’s disclosure controls and procedures to provide reasonable assurances that information required to be disclosed by the registrant in the reports that it files under the Securities Exchange Act of 1934 (a) is accumulated and communicated to registrant’s management, including its principal executive officer and principal financial officer, to allow timely decisions regarding required disclosure, and (b) is recorded, processed, summarized and reported, within the time periods specified in the rules and forms adopted by the U.S. Securities and Exchange Commission.

There have been no changes in the registrant’s internal controls over financial reporting that occurred during the registrant’s second fiscal quarter of the period covered by this report that

have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 12.  Disclosure of Securities Lending Activities forClosed-End Management Investment Companies.

Not applicable.

Item 13.  Exhibits.

(a) (1) Exhibit attached hereto.

(2) Exhibits attached hereto.

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.

Oppenheimer Master Inflation Protected Securities Fund, LLC

By:	/s/ Arthur P. Steinmetz
	Arthur P. Steinmetz
	Principal Executive Officer
Date:	3/15/2019

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/ Arthur P. Steinmetz
	Arthur P. Steinmetz
	Principal Executive Officer
Date:	3/15/2019

By:	/s/ Brian S. Petersen
	Brian S. Petersen
	Principal Financial Officer
Date:	3/15/2019