N-CSR

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT

INVESTMENT COMPANIES

Investment Company Act file number 811-4410

Oppenheimer Discovery Fund

(Exact name of registrant as specified in charter)

6803 South Tucson Way, Centennial, Colorado 80112-3924

(Address of principal executive offices) (Zip code)

Arthur S. Gabinet

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: September 30

Date of reporting period: 9/30/2015

Item 1. Reports to Stockholders.

Table of Contents

Fund Performance Discussion	3
Top Holdings and Allocations	6
Fund Expenses	9
Statement of Investments	11
Statement of Assets and Liabilities	15
Statement of Operations	17
Statements of Changes in Net Assets	18
Financial Highlights	19
Notes to Financial Statements	25
Report of Independent Registered Public Accounting Firm	38
Federal Income Tax Information	39
Board Approval of the Fund’s Investment Advisory and Sub-Advisory Agreements	40
Portfolio Proxy Voting Policies and Procedures; Updates to Statement of Investments	43
Trustees and Officers	44
Privacy Policy Notice	52

Class A Shares

AVERAGE ANNUAL TOTAL RETURNS AT 9/30/15

	Class A Shares of the Fund
	Without Sales   Charge			With Sales   Charge			Russell 2000 Growth Index			Russell 2000 Index			S&P 500 Index
1-Year		8.43	%		2.19	%		4.04	%		1.25	%		-0.61	%
5-Year		15.08			13.73			13.26			11.73			13.34
10-Year		8.44			7.80			7.67			6.55			6.80

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. Fund returns include changes in share price, reinvested distributions, and a 5.75% maximum applicable sales charge except where “without sales charge” is indicated. 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. For performance data current to the most recent month-end, visit oppenheimerfunds.com or call 1.800.CALL OPP (225.5677).

2      OPPENHEIMER DISCOVERY FUND

Fund Performance Discussion

The Fund’s Class A shares (without sales charge) produced a return of 8.43% during the reporting period, outperforming the Russell 2000 Growth Index’s (the “Index”) return of 4.04% and the Morningstar Small Growth Funds Category Average return of 2.39% over the same period. The Fund outperformed the Index in nine out of ten sectors, led by stock selection in the consumer discretionary, energy and financials sectors.

In addition, the Fund’s Class A shares (without sales charge) ranked in the 11th (75 out of 722 funds), 9th (50 out of 579 funds), and 12th (50 out of 408 funds) Morningstar Small Cap Growth percentiles for the 1-, 5- and 10-year periods ended September 30, 2015, respectively.

MARKET OVERVIEW

Markets were volatile during the reporting period, but growth stocks generally performed positively and outperformed value stocks. After U.S. equities outperformed other developed and emerging market equities in 2014, the market environment shifted over the first half of 2015. The dollar continued to strengthen, which

acted as a drag on growth. Businesses, especially U.S. firms with revenues dependent on exporting goods and services, cited this as a headwind. European Central Bank (“ECB”) President Mario Draghi announced the purchase of €60 billion a month in sovereign bonds from Eurozone countries

    Comparison of Change in Value of $10,000 Hypothetical Investments in:

3      OPPENHEIMER DISCOVERY FUND

for at least 19 months, a form of Quantitative Easing (“QE”) that is projected to increase the ECB’s balance sheet by over €1 trillion. The announcement and implementation of these extraordinary monetary policies had a significant impact on financial markets. European markets rallied and the euro fell against the currencies of most major trading partners.

Over the second half of the reporting period, fallout from the collapse of oil prices, weak overseas economies and a strong U.S. dollar weighed on U.S. Gross Domestic Product (GDP) and corporate profit forecasts. First quarter GDP growth was just 0.6%. Meanwhile, the Federal Reserve continued to forewarn a shift in monetary policy to higher interest rates later this year. Outside of the U.S., concerns around Greece’s debt situation emerged yet again. In addition, a slowdown in China weighed heavily on markets in August of 2015.

FUND REVIEW

During the reporting period, top contributors to performance included DexCom, Inc., Tyler Technologies, Inc. and Skechers U.S.A., Inc. DexCom, a medical device company focused on diabetes, reported strong first quarter growth in new patients and received approval of a new product that we believe can help it maintain above-average revenue growth in the near future. Tyler Technologies, provider of information management solutions and

services for local governments, reported strong second quarter results with revenue and earnings per share (EPS) above consensus estimates and raised full year 2015 guidance. Tyler’s defensive characteristics held up well during the global economic uncertainty rattling the market in the second half of the reporting period. Skechers, designer and marketer of lifestyle footwear for men, women and children, performed well over the second half of the reporting period. The company benefited from strong demand across its product line, both domestically and in overseas markets. In its latest quarter, the company reported a total revenue increase of 36% and a 129% increase in EPS.

Detractors from performance during the reporting period included H&E Equipment Services, Inc., Tetraphase Pharmaceuticals, Inc. and Greenbrier Companies, Inc., all of which we exited. H&E Equipment Services is an equipment rental company focused on heavy construction and industrial equipment. Shares of H&E Equipment Services declined over the first half of the reporting period as lower oil prices impaired its growth prospects, with over 50% of the company’s revenue and gross profit being derived from the Gulf Coast region. Tetraphase Pharmaceuticals, an emerging biopharmaceutical company that is developing antibiotics for complex infections, reported disappointing Phase 3 data for their lead drug, which caused a dramatic decline in the stock over the

4      OPPENHEIMER DISCOVERY FUND

second half of the reporting period. Given the unclear path forward for this drug, we decided to exit our position. Greenbrier Companies, a leading supplier of railroad equipment and services traded down due to concerns that a continued decline in the price of crude will reduce future demand for tank cars and frac sand cars.

STRATEGY & OUTLOOK

Our long-term investment process remains the same. We seek dynamic companies with above average and sustainable revenue and earnings growth that we believe are positioned to outperform. This includes leading firms in

structurally attractive industries with committed management teams that have proven records of performance.

The macroeconomic environment is characterized by modest economic expansion, flat aggregate profit growth and increased merger and acquisition activity. We believe that this is an environment that favors growth companies and are optimistic regarding the Fund’s investment strategy. Our focus on well-established, higher quality growth companies has the potential to provide both upside participation and a degree of downside protection over the long term.

	Ronald J. Zibelli, Jr., CFA
	Portfolio Manager

	Ash Shah, CFA
	Portfolio Manager

5      OPPENHEIMER DISCOVERY FUND

Top Holdings and Allocations

TOP TEN COMMON STOCK HOLDINGS

Monolithic Power Systems, Inc.	2.4%
Ultimate Software Group, Inc. (The)	2.3
Proofpoint, Inc.	2.3
Tyler Technologies, Inc.	2.2
Middleby Corp. (The)	2.2
Bright Horizons Family Solutions, Inc.	2.1
G-III Apparel Group Ltd.	2.0
CoStar Group, Inc.	2.0
Acadia Healthcare Co., Inc.	1.9
DexCom, Inc.	1.9

Portfolio holdings and allocations are subject to change. Percentages are as of September 30, 2015, and are based on net assets. For more current Fund holdings, please visit oppenheimerfunds.com.

TOP TEN COMMON STOCK INDUSTRIES

Software	16.4%
Health Care Providers & Services	8.6
Health Care Equipment & Supplies	8.1
Hotels, Restaurants & Leisure	7.1
Textiles, Apparel & Luxury Goods	6.3
Building Products	5.2
Semiconductors & Semiconductor Equipment	4.8
Commercial Banks	4.6
Internet Software & Services	3.8
Machinery	3.5

Portfolio holdings and allocations are subject to change. Percentages are as of September 30, 2015, and are based on net assets.

SECTOR ALLOCATION

Portfolio holdings and allocations are subject to change. Percentages are as of September 30, 2015, and are based on the total market value of common stocks.

6      OPPENHEIMER DISCOVERY FUND

Share Class Performance

AVERAGE ANNUAL TOTAL RETURNS WITHOUT SALES CHARGE AS OF 9/30/15

	Inception Date		1-Year		5-Year			10-Year
Class A (OPOCX)		9/11/86		8.43%		15.08%			8.44%
Class B (ODIBX)		4/4/94		7.59%		14.16%			7.93%
Class C (ODICX)		10/2/95		7.62%		14.19%			7.59%
Class I (ODIIX)		1/27/12		8.88%		13.75%	*		N/A
Class R (ODINX)		3/1/01		8.13%		14.76%			8.14%
Class Y (ODIYX)		6/1/94		8.69%		15.44%			8.77%

AVERAGE ANNUAL TOTAL RETURNS WITH SALES CHARGE AS OF 9/30/15

	Inception Date		1-Year		5-Year			10-Year
Class A (OPOCX)		9/11/86		2.19%		13.73%			7.80%
Class B (ODIBX)		4/4/94		2.83%		13.92%			7.93%
Class C (ODICX)		10/2/95		6.66%		14.19%			7.59%
Class I (ODIIX)		1/27/12		8.88%		13.75%	*		N/A
Class R (ODINX)		3/1/01		8.13%		14.76%			8.14%
Class Y (ODIYX)		6/1/94		8.69%		15.44%			8.77%

* Shows performance since inception.

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. For performance data current to the most recent month-end, visit oppenheimerfunds.com or call 1.800.CALL OPP (225.5677). Fund returns include changes in share price, reinvested distributions, and the applicable sales charge: for Class A shares, the current maximum initial sales charge of 5.75%; for Class B shares, the contingent deferred sales charge of 5% (1-year) and 2% (5-year); and for Class C shares, the contingent deferred sales charge (“CDSC”) of 1% for the 1-year period. Prior to 7/1/14, Class R shares were named Class N shares. Beginning 7/1/14, new purchases of Class R shares will no longer be subject to a CDSC upon redemption (any CDSC will remain in effect for purchases prior to 7/1/14). There is no sales charge for Class I and Class Y shares. Because Class B shares convert to Class A shares 72 months after purchase, the 10-year return for Class B shares uses Class A performance for the period after conversion.

The Fund’s performance is compared to the performance of the Russell 2000 Growth Index, the Russell 2000 Index and the S&P 500 Index. The Russell 2000 Growth Index is an index of those companies among the 2,000 smallest companies in the Russell 3000 Index that have higher price-to-book ratios and higher forecasted growth values. The Russell 2000 Index is a capitalization-weighted index of the 2,000 smallest companies in the Russell 3000 Index. The Russell 3000 Index measures the performance of the 3,000 largest U.S. companies based on

7      OPPENHEIMER DISCOVERY FUND

total market capitalization. The S&P 500 Index is an index of large-capitalization equity securities that is a measure of the general domestic stock market. The indices are unmanaged 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 the indices. 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 Morningstar Small Growth Funds Category Average is the average return of the mutual funds within the investment category as defined by Morningstar. Returns include the reinvestment of distributions but do not consider sales charges. The Morningstar Small Growth Funds Category Average performance is shown for illustrative purposes only and does not predict or depict the performance of the Fund.

Morningstar ranking is for Class A shares and ranking may include more than one share class of funds in the category, including other share classes of this Fund. Ranking is based on total return as of 9/30/15, without considering sales charges. Different share classes may have different expenses and performance characteristics. Fund rankings are subject to change monthly. The Fund’s total-return percentile rank is relative to all funds that are in the Small Growth Funds category. The highest (or most favorable) percentile rank is 1 and the lowest (or least favorable) percentile rank is 100. The top-performing fund in a category will always receive a rank of 1.

The Fund's investment strategy and focus can change over time. The mention of specific fund holdings does not constitute a recommendation by OppenheimerFunds, Inc. or its affiliates.

Before investing in any of the Oppenheimer funds, investors should carefully consider a fund's investment objectives, risks, charges and expenses. Fund prospectuses and summary prospectuses contain this and other information about the funds, and may be obtained by asking your financial advisor, visiting oppenheimerfunds.com, or calling 1.800.CALL OPP (225.5677). Read prospectuses and summary prospectuses carefully before investing.

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.

8      OPPENHEIMER DISCOVERY FUND

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 entire 6-month period ended September 30, 2015.

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 for the class of shares you hold, 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 September 30, 2015” 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 for each class of shares, and an assumed rate of return of 5% per year for each class 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 for the class of shares you hold 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 as front-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.

9      OPPENHEIMER DISCOVERY FUND

Actual	Beginning Account Value April 1, 2015		Ending Account Value September 30, 2015		Expenses Paid During 6 Months Ended September 30, 2015
Class A	$	1,000.00	$	936.20	$	5.35
Class B		1,000.00		932.50		9.05
Class C		1,000.00		932.60		9.05
Class I		1,000.00		938.20		3.26
Class R		1,000.00		934.90		6.62
Class Y		1,000.00		937.20		4.19
Hypothetical
(5% return before expenses)
Class A		1,000.00		1,019.55		5.58
Class B		1,000.00		1,015.74		9.44
Class C		1,000.00		1,015.74		9.44
Class I		1,000.00		1,021.71		3.40
Class R		1,000.00		1,018.25		6.90
Class Y		1,000.00		1,020.76		4.37

Expenses are equal to the Fund’s annualized expense ratio for that class, multiplied by the average account value over the period, multiplied by 183/365 (to reflect the one-half year period). Those annualized expense ratios, excluding indirect expenses from affiliated funds, based on the 6-month period ended September 30, 2015 are as follows:

Class	Expense Ratios
Class A		1.10%
Class B		1.86
Class C		1.86
Class I		0.67
Class R		1.36
Class Y		0.86

The expense ratios reflect 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” tables in the Fund’s financial statements, included in this report, also show the gross expense ratios, without such waivers or reimbursements and reduction to custodian expenses, if applicable.

10      OPPENHEIMER DISCOVERY FUND

STATEMENT OF INVESTMENTS September 30, 2015

	Shares		Value
Common Stocks—95.5%
Consumer Discretionary—21.2%
Diversified Consumer Services—2.4%
2U, Inc.1		151,610	$	5,442,799
Bright Horizons Family Solutions, Inc.1		672,434		43,197,160
				48,639,959
Hotels, Restaurants & Leisure—7.1%
Buffalo Wild Wings, Inc.1		121,570		23,515,285
Dave & Buster’s Entertainment, Inc.1		407,840		15,428,587
Fiesta Restaurant Group, Inc.1		248,280		11,264,464
Jack in the Box, Inc.		197,058		15,181,349
Papa John’s International, Inc.		362,640		24,833,587
Popeyes Louisiana Kitchen, Inc.1		505,020		28,462,927
Wingstop, Inc.1		214,790		5,150,664
Zoe’s Kitchen, Inc.1		479,180		18,922,818
				142,759,681
Household Durables—0.5%
WCI Communities, Inc.1		462,060		10,456,418
Internet & Catalog Retail—0.8%
HSN, Inc.		280,490		16,055,248
Multiline Retail—1.6%
Burlington Stores, Inc.1		608,630		31,064,475
Specialty Retail—2.5%
Lithia Motors, Inc., Cl. A		289,440		31,291,358
Michaels Cos., Inc. (The)1		857,610		19,810,791
				51,102,149
Textiles, Apparel & Luxury Goods—6.3%
Carter’s, Inc.		223,500		20,258,040
Columbia Sportswear Co.		235,620		13,852,100
G-III Apparel Group Ltd.1		666,554		41,099,720

	Shares		Value
Textiles, Apparel & Luxury Goods (Continued)
Skechers U.S.A., Inc., Cl. A1		266,201	$	35,692,230
Steven Madden Ltd.1		439,930		16,110,236
				127,012,326
Consumer Staples—1.5%
Food Products—1.5%
Blue Buffalo Pet Products, Inc.1		152,750		2,735,753
Hain Celestial Group, Inc. (The)1		286,800		14,798,880
J&J Snack Foods Corp.		110,864		12,600,802
				30,135,435
Energy—1.6%
Oil, Gas & Consumable Fuels—1.6%
Diamondback Energy, Inc.1		370,180		23,913,628
Matador Resources Co.1		377,960		7,838,890
				31,752,518
Financials—8.2%
Capital Markets—0.8%
HFF, Inc., Cl. A		353,478		11,933,417
WisdomTree Investments, Inc.		279,660		4,510,916
				16,444,333
Commercial Banks—4.6%
Bank of the Ozarks, Inc.		395,650		17,313,644
Pinnacle Financial Partners, Inc.		258,120		12,753,709
PrivateBancorp, Inc.		304,350		11,665,736
Signature Bank1		167,989		23,108,567
Western Alliance Bancorp1		928,710		28,520,684
				93,362,340
Diversified Financial Services—1.3%
MarketAxess Holdings, Inc.		289,342		26,874,085
Real Estate Management & Development—0.8%
Marcus & Millichap, Inc.1		343,640		15,804,003

11      OPPENHEIMER DISCOVERY FUND

STATEMENT OF INVESTMENTS Continued

	Shares		Value
Thrifts & Mortgage Finance—0.7%
Essent Group Ltd.1		518,180	$	12,876,773
Health Care—23.6%
Biotechnology—3.3%
Bluebird Bio, Inc.1		60,230		5,152,676
Cepheid1		212,960		9,625,792
Clovis Oncology, Inc.1		79,930		7,350,363
Dyax Corp.1		319,540		6,100,019
Neurocrine Biosciences, Inc.1		200,550		7,979,884
Repligen Corp.1		424,330		11,817,590
Ultragenyx Pharmaceutical, Inc.1		185,550		17,870,321
				65,896,645
Health Care Equipment & Supplies—8.1%
ABIOMED, Inc.1		129,380		12,001,289
Cantel Medical Corp.		423,353		24,004,115
DexCom, Inc.1		446,588		38,344,046
Inogen, Inc.1		366,380		17,787,749
Integra LifeSciences Holdings Corp.1		165,190		9,837,064
K2M Group Holdings, Inc.1		603,720		11,229,192
Merit Medical Systems, Inc.1		852,320		20,378,971
Neogen Corp.1		160,540		7,222,695
NuVasive, Inc.1		127,960		6,170,231
Penumbra, Inc.1		80,240		3,217,624
West Pharmaceutical Services, Inc.		250,805		13,573,567
				163,766,543
Health Care Providers & Services—8.6%
Acadia Healthcare Co., Inc.1		583,537		38,670,997
Amsurg Corp.1		97,280		7,559,629
Centene Corp.1		461,440		25,023,891
Diplomat Pharmacy, Inc.1		442,410		12,710,439
HealthEquity, Inc.1		480,640		14,202,912
LifePoint Health, Inc.1		230,626		16,351,383

	Shares		Value
Health Care Providers & Services (Continued)
Team Health Holdings, Inc.1		414,340	$	22,386,790
Teladoc, Inc.1		172,130		3,836,778
VCA, Inc.1		615,220		32,391,333
				173,134,152
Health Care Technology—1.7%
Omnicell, Inc.1		515,033		16,017,526
Press Ganey Holdings, Inc.1		221,010		6,539,686
Veeva Systems, Inc., Cl. A1		494,553		11,577,486
				34,134,698
Life Sciences Tools & Services—1.5%
ICON plc1		190,110		13,492,107
INC Research Holdings, Inc., Cl. A1		418,236		16,729,440
				30,221,547
Pharmaceuticals—0.4%
Depomed, Inc.1		427,526		8,058,865
Industrials—11.9%
Aerospace & Defense—0.8%
Curtiss-Wright Corp.		232,400		14,506,408
Airlines—1.5%
Allegiant Travel Co., Cl. A		140,485		30,379,881
Building Products—5.2%
A.O. Smith Corp.		553,240		36,065,716
Apogee Enterprises, Inc.		332,940		14,865,771
Continental Building Products, Inc.1		669,310		13,747,627
Lennox International, Inc.		231,500		26,235,895
Masonite International Corp.1		228,140		13,820,721
				104,735,730
Commercial Services & Supplies—0.5%
Mobile Mini, Inc.		329,820		10,155,158
Machinery—3.5%
Middleby Corp. (The)1		414,183		43,567,910

12      OPPENHEIMER DISCOVERY FUND

	Shares		Value
Machinery (Continued)
Wabtec Corp.		300,988	$	26,501,993
				70,069,903
Professional Services—0.4%
TransUnion1		326,937		8,212,658
Information Technology—26.0%
Electronic Equipment, Instruments, & Components—0.5%
Cognex Corp.		304,540		10,467,040
Internet Software & Services—3.8%
Benefitfocus, Inc.1		314,230		9,819,688
comScore, Inc.1		295,990		13,659,939
CoStar Group, Inc.1		232,390		40,217,413
Demandware, Inc.1		250,990		12,971,163
				76,668,203
IT Services—0.5%
EPAM Systems, Inc.1		119,070		8,873,096
Semiconductors & Semiconductor Equipment—4.8%
Ambarella, Inc.1		135,630		7,838,058
Cavium, Inc.1		474,190		29,101,040
Microsemi Corp.1		361,680		11,870,338
Monolithic Power Systems, Inc.		925,320		47,376,384
				96,185,820
Software—16.4%
CyberArk Software Ltd.1		159,460		7,995,324
Ellie Mae, Inc.1		263,180		17,519,893
Globant SA1		607,931		18,596,609
Guidewire Software, Inc.1		679,782		35,742,937
HubSpot, Inc.1		594,613		27,572,205

	Shares			Value
Software (Continued)
Manhattan Associates, Inc.1		367,790		$	22,913,317
Paylocity Holding Corp.1		798,300			23,941,017
Proofpoint, Inc.1		762,471			45,992,251
ServiceNow, Inc.1		325,865			22,631,324
Tableau Software, Inc., Cl. A1		191,590			15,285,050
Tyler Technologies, Inc.1		302,970			45,236,451
Ultimate Software Group, Inc. (The)1		260,562			46,643,204
					330,069,582
Materials—1.5%
Construction Materials—0.7%
Headwaters, Inc.1		705,910			13,271,108
Containers & Packaging—0.8%
Berry Plastics Group, Inc.1		558,930			16,807,025
Total Common Stocks (Cost $1,476,256,062)					1,919,953,805
Investment Company—5.1%
Oppenheimer Institutional Money Market Fund, Cl. E, 0.18%2,3 (Cost $103,491,399)		103,491,399			103,491,399
Total Investments, at Value (Cost $1,579,747,461)		100.6	%		2,023,445,204
Net Other Assets (Liabilities)		(0.6	)		(11,143,104	)
Net Assets		100.0	%	$	2,012,302,100

Footnotes to Statement of Investments

1. Non-income producing security.

2. Rate shown is the 7-day yield at period end.

13      OPPENHEIMER DISCOVERY FUND

STATEMENT OF INVESTMENTS Continued

Footnotes to Statement of Investments (Continued)

3. 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						Shares
	September 30,		Gross		Gross		September 30,
	2014		Additions		Reductions		2015
Oppenheimer Institutional Money
Market Fund, Cl. E		72,774,930		915,053,357		884,336,888		103,491,399
					Value		Income
Oppenheimer Institutional Money Market Fund, Cl. E					$	103,491,399	$	79,445

See accompanying Notes to Financial Statements.

14      OPPENHEIMER DISCOVERY FUND

STATEMENT OF ASSETS AND LIABILITIES September 30, 2015

Assets
Investments, at value—see accompanying statement of investments:
Unaffiliated companies (cost $1,476,256,062)	$	1,919,953,805
Affiliated companies (cost $103,491,399)		103,491,399
		2,023,445,204
Cash		1,529,714
Receivables and other assets:
Investments sold		26,158,649
Shares of beneficial interest sold		2,032,505
Dividends		347,232
Other		138,792
Total assets		2,053,652,096
Liabilities
Payables and other liabilities:
Investments purchased		35, 880,587
Shares of beneficial interest redeemed		4,770,585
Trustees’ compensation		330,895
Distribution and service plan fees		320,000
Shareholder communications		16,962
Other		30,967
Total liabilities		41,349,996
Net Assets	$	2,012,302,100
Composition of Net Assets
Par value of shares of beneficial interest	$	28,322
Additional paid-in capital		1,477,006,382
Accumulated net investment loss		(11,116,558)
Accumulated net realized gain on investments		102,686,211
Net unrealized appreciation on investments		443,697,743
Net Assets	$	2,012,302,100

15      OPPENHEIMER DISCOVERY FUND

STATEMENT OF ASSETS AND LIABILITIES Continued

Net Asset Value Per Share
Class A Shares:
Net asset value and redemption price per share (based on net assets of $1,244,242,508 and
17,450,101 shares of beneficial interest outstanding)	$	71.30
Maximum offering price per share (net asset value plus sales charge of 5.75% of offering price)	$	75.65
Class B Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales charge) and offering price per share (based on net assets of $29,322,850 and 538,372 shares of beneficial interest outstanding)	$	54.47
Class C Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales charge) and offering price per share (based on net assets of $156,113,738 and 2,774,156 shares of beneficial interest outstanding)	$	56.27
Class I Shares:
Net asset value, redemption price and offering price per share (based on net assets of
$76,082,976 and 966,361 shares of beneficial interest outstanding)	$	78.73
Class R Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales charge) and offering price per share (based on net assets of $52,499,948 and 777,537 shares of beneficial interest outstanding)	$	67.52
Class Y Shares:
Net asset value, redemption price and offering price per share (based on net assets of
$454,040,080 and 5,815,336 shares of beneficial interest outstanding)	$	78.08

See accompanying Notes to Financial Statements.

16      OPPENHEIMER DISCOVERY FUND

STATEMENT OF OPERATIONS For the Year Ended September 30, 2015

Investment Income
Dividends:
Unaffiliated companies (net of foreign withholding taxes of $32,486)	$	9,293,572
Affiliated companies		79,445
Interest		800
Total investment income		9,373,817
Expenses
Management fees		13,433,478
Distribution and service plan fees:
Class A		3,196,399
Class B		384,358
Class C		1,688,246
Class R		280,274
Transfer and shareholder servicing agent fees:
Class A		2,936,373
Class B		85,092
Class C		372,956
Class I		21,236
Class R		123,769
Class Y		989,121
Shareholder communications:
Class A		47,883
Class B		3,148
Class C		6,233
Class I		511
Class R		1,158
Class Y		8,614
Trustees’ compensation		44,235
Custodian fees and expenses		12,103
Borrowing fees		6,884
Other		71,116
Total expenses		23,713,187
Less waivers and reimbursements of expenses		(60,764	)
Net expenses		23,652,423
Net Investment Loss		(14,278,606	)
Realized and Unrealized Gain
Net realized gain on unaffiliated companies		164,505,267
Net change in unrealized appreciation/depreciation on investments		12,833,786
Net Increase in Net Assets Resulting from Operations	$	163,060,447

See accompanying Notes to Financial Statements.

17      OPPENHEIMER DISCOVERY FUND

STATEMENTS OF CHANGES IN NET ASSETS

	Year Ended September 30, 2015			Year Ended September 30, 2014
Operations
Net investment loss	$	(14,278,606	)	$	(20,541,798	)
Net realized gain		164,505,267			249,024,873
Net change in unrealized appreciation/depreciation		12,833,786			(281,144,234	)
Net increase (decrease) in net assets resulting from operations		163,060,447			(52,661,159	)
Dividends and/or Distributions to Shareholders
Distributions from net realized gain:
Class A		(118,870,223	)		(114,411,303	)
Class B		(4,969,299	)		(6,012,165	)
Class C		(18,860,323	)		(17,210,691	)
Class I		(4,490,360	)		(3,420,454	)
Class R1		(5,339,440	)		(4,928,061	)
Class Y		(37,400,883	)		(29,113,799	)
		(189,930,528	)		(175,096,473	)
Beneficial Interest Transactions
Net increase (decrease) in net assets resulting from beneficial interest transactions:
Class A		(1,977,369	)		(115,060,919	)
Class B		(15,251,132	)		(16,544,716	)
Class C		(1,373,812	)		(5,103,017	)
Class I		24,458,429			8,228,755
Class R1		(1,667,598	)		(1,566,660	)
Class Y		22,074,184			79,847,966
		26,262,702			(50,198,591	)
Net Assets
Total decrease		(607,379	)		(277,956,223	)
Beginning of period		2,012,909,479			2,290,865,702
End of period (including accumulated net investment loss of $11,116,558 and $14,801,839, respectively)	$	2,012,302,100		$	2,012,909,479

1. Effective July 1, 2014, Class N shares were renamed Class R. See Note 1 of the accompanying Notes.

See accompanying Notes to Financial Statements.

18      OPPENHEIMER DISCOVERY FUND

FINANCIAL HIGHLIGHTS

	Year Ended			Year Ended			Year Ended			Year Ended			Year Ended
	September 30,			September 30,			September 30,			September 28,			September 30,
Class A	2015			2014			2013			20121			2011
Per Share Operating Data
Net asset value, beginning of period	$	72.35		$	79.80		$	65.78		$	52.70		$	47.67
Income (loss) from investment operations:
Net investment loss2		(0.49	)3		(0.66	)		(0.47	)		(0.35	)4		(0.62	)
Net realized and unrealized gain (loss)		6.45			(0.80	)		18.89			16.61			5.65
Total from investment operations		5.96			(1.46	)		18.42			16.26			5.03
Dividends and/or distributions to shareholders:
Distributions from net realized gain		(7.01	)		(5.99	)		(4.40	)		(3.18	)		0.00
Net asset value, end of period	$	71.30		$	72.35		$	79.80		$	65.78		$	52.70
Total Return, at Net Asset Value5		8.43%			(2.21)%			30.58%			31.86%			10.55%
Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	1,244,242		$	1,258,537		$	1,517,368		$	1,142,202		$	822,073
Average net assets (in thousands)	$	1,334,300		$	1,469,328		$	1,259,365		$	1,002,017		$	930,632
Ratios to average net assets:6
Net investment loss		(0.66)%	3		(0.87)%			(0.70)%			(0.58)%	4		(1.04)%
Expenses excluding interest and fees from borrowings		1.10%			1.12%			1.24%			1.29%			1.30%
Interest and fees from borrowings		0.00%	7		0.00%			0.00%			0.00%			0.00%
Total expenses8		1.10%			1.12%			1.24%			1.29%			1.30%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses		1.10%			1.12%			1.22%			1.24%			1.30%
Portfolio turnover rate		88%			87%			86%			100%			112%

1. September 28, 2012 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. Net investment loss per share and the net investment loss ratio include $0.10 and 0.13%, respectively, resulting from a special dividend from HSN, Inc. in February 2015.

4. Net investment loss per share and the net investment loss ratio include $0.23 and 0.38%, respectively, resulting from a special dividend from H&E Equipment Services, Inc. in September 2012.

5. 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. The returns do not include adjustments in accordance with generally accepted accounting principles required at the period end for financial reporting purposes.

6. Annualized for periods less than one full year.

7. Less than 0.005%.

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

Year Ended September 30, 2015	1.10	%
Year Ended September 30, 2014	1.12	%
Year Ended September 30, 2013	1.24	%
Year Ended September 28, 2012	1.29	%
Year Ended September 30, 2011	1.30	%

See accompanying Notes to Financial Statements.

19      OPPENHEIMER DISCOVERY FUND

FINANCIAL HIGHLIGHTS Continued

Class B	Year Ended September 30, 2015			Year Ended September 30, 2014		Year Ended September 30, 2013		Year Ended September 28, 20121			Year Ended September 30, 2011
Per Share Operating Data
Net asset value, beginning of period	$	57.21		$	64.82	$	54.73	$	44.67		$	40.72
Income (loss) from investment operations:
Net investment loss2		(0.81)3			(1.05)		(0.82)		(0.72)4			(0.92)
Net realized and unrealized gain (loss)		5.08			(0.57)		15.31		13.96			4.87
Total from investment operations		4.27			(1.62)		14.49		13.24			3.95
Dividends and/or distributions to shareholders:
Distributions from net realized gain		(7.01)			(5.99)		(4.40)		(3.18)			0.00
Net asset value, end of period	$	54.47		$	57.21	$	64.82	$	54.73		$	44.67
Total Return, at Net Asset Value5		7.59%			(2.96)%		29.48%		30.73%			9.70%
Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	29,323		$	45,662	$	69,220	$	70,099		$	65,720
Average net assets (in thousands)	$	38,598		$	59,224	$	64,723	$	69,972		$	86,703
Ratios to average net assets:6
Net investment loss		(1.40)%	3		(1.71)%		(1.52)%		(1.44)%	4		(1.84)%
Expenses excluding interest and fees from borrowings		1.86%			1.96%		2.21%		2.30%			2.35%
Interest and fees from borrowings		0.00%	7		0.00%		0.00%		0.00%			0.00%
Total expenses8		1.86%			1.96%		2.21%		2.30%			2.35%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses		1.86%			1.96%		2.05%		2.07%			2.08%
Portfolio turnover rate		88%			87%		86%		100%			112%

1. September 28, 2012 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. Net investment loss per share and the net investment loss ratio include $0.08 and 0.13%, respectively, resulting from a special dividend from HSN, Inc. in February 2015.

4. Net investment loss per share and the net investment loss ratio include $0.19 and 0.38%, respectively, resulting from a special dividend from H&E Equipment Services, Inc. in September 2012.

5. 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. The returns do not include adjustments in accordance with generally accepted accounting principles required at the period end for financial reporting purposes.

6. Annualized for periods less than one full year.

7. Less than 0.005%.

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

Year Ended September 30, 2015	1.86	%
Year Ended September 30, 2014	1.96	%
Year Ended September 30, 2013	2.21	%
Year Ended September 28, 2012	2.30	%
Year Ended September 30, 2011	2.35	%

See accompanying Notes to Financial Statements.

20      OPPENHEIMER DISCOVERY FUND

Class C	Year Ended September 30, 2015			Year Ended September 30, 2014		Year Ended September 30, 2013		Year Ended September 28, 20121			Year Ended September 30, 2011
Per Share Operating Data
Net asset value, beginning of period	$	58.89		$	66.50	$	56.01	$	45.63		$	41.60
Income (loss) from investment operations:
Net investment loss2		(0.84)3			(1.02)		(0.83)		(0.71)4			(0.92)
Net realized and unrealized gain (loss)		5.23			(0.60)		15.72		14.27			4.95
Total from investment operations		4.39			(1.62)		14.89		13.56			4.03
Dividends and/or distributions to shareholders:
Distributions from net realized gain		(7.01)			(5.99)		(4.40)		(3.18)			0.00
Net asset value, end of period	$	56.27		$	58.89	$	66.50	$	56.01		$	45.63
Total Return, at Net Asset Value5		7.62%			(2.94)%		29.54%		30.83%			9.69%
Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	156,114		$	163,675	$	191,061	$	142,944		$	108,443
Average net assets (in thousands)	$	169,437		$	187,330	$	158,132	$	127,254		$	117,476
Ratios to average net assets:6
Net investment loss		(1.41)%	3		(1.62)%		(1.49)%		(1.38)%	4		(1.80)%
Expenses excluding interest and fees from borrowings		1.86%			1.88%		2.00%		2.07%			2.11%
Interest and fees from borrowings		0.00%	7		0.00%		0.00%		0.00%			0.00%
Total expenses8		1.86%			1.88%		2.00%		2.07%			2.11%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses		1.86%			1.88%		2.00%		2.04%			2.05%
Portfolio turnover rate		88%			87%		86%		100%			112%

1. September 28, 2012 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. Net investment loss per share and the net investment loss ratio include $0.08 and 0.13%, respectively, resulting from a special dividend from HSN, Inc. in February 2015.

4. Net investment loss per share and the net investment loss ratio include $0.20 and 0.38%, respectively, resulting from a special dividend from H&E Equipment Services, Inc. in September 2012.

5. 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. The returns do not include adjustments in accordance with generally accepted accounting principles required at the period end for financial reporting purposes.

6. Annualized for periods less than one full year.

7. Less than 0.005%.

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

Year Ended September 30, 2015	1.86	%
Year Ended September 30, 2014	1.88	%
Year Ended September 30, 2013	2.00	%
Year Ended September 28, 2012	2.07	%
Year Ended September 30, 2011	2.11	%

See accompanying Notes to Financial Statements.

21      OPPENHEIMER DISCOVERY FUND

FINANCIAL HIGHLIGHTS Continued

Class I	Year Ended September 30, 2015			Year Ended September 30, 2014			Year Ended September 30, 2013			Period Ended September 28, 20121,2
Per Share Operating Data
Net asset value, beginning of period	$	78.88		$	86.11		$	70.26		$	61.45
Income (loss) from investment operations:
Net investment income (loss)3		(0.19	)4		(0.34	)		(0.21	)		0.06	5
Net realized and unrealized gain (loss)		7.05			(0.90	)		20.46			8.75
Total from investment operations		6.86			(1.24	)		20.25			8.81
Dividends and/or distributions to shareholders:
Distributions from net realized gain		(7.01	)		(5.99	)		(4.40	)		0.00
Net asset value, end of period	$	78.73		$	78.88		$	86.11		$	70.26
Total Return, at Net Asset Value6		8.88	%		(1.75	)%		31.27	%		14.36	%
Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	76,083		$	51,668		$	48,274		$	11
Average net assets (in thousands)	$	70,840		$	51,768		$	29,818		$	11
Ratios to average net assets:7
Net investment income (loss)		(0.23)%	4		(0.41)%			(0.29)%			0.13%	5
Expenses excluding interest and fees from borrowings		0.67%			0.67%			0.68%			0.69%
Interest and fees from borrowings		0.00%	8		0.00%			0.00%			0.00%
Total expenses9		0.67%			0.67%			0.68%			0.69%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses		0.67%			0.67%			0.68%			0.69%
Portfolio turnover rate		88%			87%			86%			100%

1. September 28, 2012 represents the last business day of the Fund’s reporting period.

2. For the period from January 27, 2012 (inception of offering) to September 28, 2012.

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

4. Net investment loss per share and the net investment loss ratio include $0.11 and 0.20%, respectively, resulting from a special dividend from HSN, Inc. in February 2015.

5. Net investment loss per share and the net investment loss ratio include $0.25 and 0.57%, respectively, resulting from a special dividend from H&E Equipment Services, Inc. in September 2012.

6. 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. The returns do not include adjustments in accordance with generally accepted accounting principles required at the period end for financial reporting purposes.

7. Annualized for periods less than one full year.

8. Less than 0.005%.

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

Year Ended September 30, 2015	0.67	%
Year Ended September 30, 2014	0.67	%
Year Ended September 30, 2013	0.68	%
Period Ended September 28, 2012	0.69	%

See accompanying Notes to Financial Statements.

22      OPPENHEIMER DISCOVERY FUND

Class R	Year Ended September 30, 2015			Year Ended September 30, 2014			Year Ended September 30, 2013			Year Ended September 28, 20121			Year Ended September 30, 2011
Per Share Operating Data
Net asset value, beginning of period	$	69.02		$	76.59		$	63.51		$	51.12		$	46.36
Income (loss) from investment operations:
Net investment loss2		(0.65	)3		(0.83	)		(0.65	)		(0.51	)4		(0.74	)
Net realized and unrealized gain (loss)		6.16			(0.75	)		18.13			16.08			5.50
Total from investment operations		5.51			(1.58	)		17.48			15.57			4.76
Dividends and/or distributions to shareholders:
Distributions from net realized gain		(7.01	)		(5.99	)		(4.40	)		(3.18	)		0.00
Net asset value, end of period	$	67.52		$	69.02		$	76.59		$	63.51		$	51.12
Total Return, at Net Asset Value5		8.13	%		(2.45	)%		30.17	%		31.49	%		10.27	%
Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	52,500		$	55,092		$	62,994		$	44,516		$	34,945
Average net assets (in thousands)	$	56,234		$	62,176		$	50,464		$	40,753		$	36,695
Ratios to average net assets:6
Net investment loss		(0.91	)%3		(1.14	)%		(1.01	)%		(0.89	)%4		(1.29	)%
Expenses excluding interest and fees from borrowings		1.36	%		1.39	%		1.51	%		1.55	%		1.55	%
Interest and fees from borrowings		0.00	%7		0.00	%		0.00	%		0.00	%		0.00	%
Total expenses8		1.36	%		1.39	%		1.51	%		1.55	%		1.55	%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses		1.36	%		1.39	%		1.51	%		1.54	%		1.54	%
Portfolio turnover rate		88	%		87	%		86	%		100	%		112	%

1. September 28, 2012 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. Net investment loss per share and the net investment loss ratio include $0.10 and 0.13%, respectively, resulting from a special dividend from HSN, Inc. in February 2015.

4. Net investment loss per share and the net investment loss ratio include $0.22 and 0.38%, respectively, resulting from a special dividend from H&E Equipment Services, Inc. in September 2012.

5. 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. The returns do not include adjustments in accordance with generally accepted accounting principles required at the period end for financial reporting purposes.

6. Annualized for periods less than one full year.

7. Less than 0.005%.

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

Year Ended September 30, 2015	1.36	%
Year Ended September 30, 2014	1.39	%
Year Ended September 30, 2013	1.51	%
Year Ended September 28, 2012	1.55	%
Year Ended September 30, 2011	1.55	%

See accompanying Notes to Financial Statements.

23      OPPENHEIMER DISCOVERY FUND

FINANCIAL HIGHLIGHTS Continued

Class Y	Year Ended September 30, 2015			Year Ended September 30, 2014			Year Ended September 30, 2013			Year Ended September 28, 20121			Year Ended September 30, 2011
Per Share Operating Data
Net asset value, beginning of period	$	78.42		$	85.80		$	70.16		$	55.83		$	50.30
Income (loss) from investment operations:
Net investment loss2		(0.35	)3		(0.50	)		(0.31	)		(0.11	)4		(0.38	)
Net realized and unrealized gain (loss)		7.02			(0.89	)		20.35			17.62			5.91
Total from investment operations		6.67			(1.39	)		20.04			17.51			5.53
Dividends and/or distributions to shareholders:
Distributions from net realized gain		(7.01	)		(5.99	)		(4.40	)		(3.18	)		0.00
Net asset value, end of period	$	78.08		$	78 .42		$	85.80		$	70.16		$	55.83
Total Return, at Net Asset Value5		8.69	%		(1.96	)%		30.99	%		32.34	%		11.00	%
Ratios/Supplemental Data
Net assets, end of period (in thousands)	$	454,040		$	438,275		$	401,949		$	157,892		$	75,912
Average net assets (in thousands)	$	449,539		$	467,755		$	271,295		$	110,845		$	61,766
Ratios to average net assets:6
Net investment loss		(0.42	)%3		(0.61	)%		(0.43	)%		(0.17	)%4		(0.60	)%
Expenses excluding interest and fees from borrowings		0.86	%		0.87	%		0.91	%		0.90	%		0.86	%
Interest and fees from borrowings		0.00	%7		0.00	%		0.00	%		0.00	%		0.00	%
Total expenses8		0.86	%		0.87	%		0.91	%		0.90	%		0.86	%
Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses		0.86	%		0.87	%		0.91	%		0.90	%		0.86	%
Portfolio turnover rate		88	%		87	%		86	%		100	%		112	%

1. September 28, 2012 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. Net investment loss per share and the net investment loss ratio include $0.11 and 0.13%, respectively, resulting from a special dividend from HSN, Inc. in February 2015.

4. Net investment loss per share and the net investment loss ratio include $0.25 and 0.38%, respectively, resulting from a special dividend from H&E Equipment Services, Inc. in September 2012.

5. 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. The returns do not include adjustments in accordance with generally accepted accounting principles required at the period end for financial reporting purposes.

6. Annualized for periods less than one full year.

7. Less than 0.005%.

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

Year Ended September 30, 2015	0.86	%
Year Ended September 30, 2014	0.87	%
Year Ended September 30, 2013	0.91	%
Year Ended September 28, 2012	0.90	%
Year Ended September 30, 2011	0.86	%

See accompanying Notes to Financial Statements.

24      OPPENHEIMER DISCOVERY FUND

NOTES TO FINANCIAL STATEMENTS September 30, 2015

1. Organization

Oppenheimer Discovery Fund (the “Fund”) is a diversified open-end management investment company registered under the Investment Company Act of 1940 (“1940 Act”), as amended. The Fund’s investment objective is to seek capital appreciation. 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 a sub-advisory agreement with OFI.

The Fund offers Class A, Class C, Class I, Class R and Class Y shares, and previously offered Class B shares for new purchase through June 29, 2012. Subsequent to that date, no new purchases of Class B shares are permitted, however reinvestment of dividend and/or capital gain distributions and exchanges of Class B shares into and from other Oppenheimer funds are allowed. As of July 1, 2014, Class N shares were renamed Class R shares. Class N shares subject to a contingent deferred sales charge (“CDSC”) on July 1, 2014, continue to be subject to a CDSC after the shares were renamed. Purchases of Class R shares occurring on or after July 1, 2014, are not subject to a CDSC upon redemption. Class A shares are sold at their offering price, which is normally net asset value plus a front-end sales charge. Class C and Class R shares are sold, and Class B shares were sold, without a front-end sales charge but may be subject to a contingent deferred sales charge (“CDSC”). Class R shares are sold only through retirement plans. Retirement plans that offer Class R shares may impose charges on those accounts. Class I and Class Y shares are sold to certain institutional investors or intermediaries without either a front-end sales charge or a CDSC, however, the intermediaries may impose charges on their accountholders who beneficially own Class I and Class Y shares. All classes of shares have identical rights and voting privileges with respect to the Fund in general and exclusive voting rights on matters that affect that class alone. Earnings, net assets and net asset value per share may differ due to each class having its own expenses, such as transfer and shareholder servicing agent fees and shareholder communications, directly attributable to that class. Class A, B, C and R shares have separate distribution and/or service plans under which they pay fees. Class I and Class Y shares do not pay such fees. Class B shares will automatically convert to Class A shares 72 months after the date of purchase.

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.

Reporting Period End Date. The last day of the Fund’s reporting period is the last day the New York Stock Exchange was open for trading during the period. The Fund’s financial statements have been presented through that date to maintain consistency with the Fund’s net asset value calculations used for shareholder transactions.

25      OPPENHEIMER DISCOVERY FUND

NOTES TO FINANCIAL STATEMENTS Continued

2. Significant Accounting Policies (Continued)

Allocation of Income, Expenses, Gains and Losses. Income, expenses (other than those attributable to a specific class), gains and losses are allocated on a daily basis to each class of shares based upon the relative proportion of net assets represented by such class. Operating expenses directly attributable to a specific class are charged against the operations of that class.

Dividends and Distributions to Shareholders. Dividends and distributions to shareholders, which are determined in accordance with income tax regulations and may differ from U.S. generally accepted accounting principles, are recorded on the ex-dividend date. Income and capital gain distributions, if any, are declared and paid annually or at other times as deemed necessary by the Manager.

Investment Income. Dividend income is recorded on the ex-dividend date or upon ex-dividend notification in the case of certain foreign dividends where the ex-dividend date may have passed. Non-cash dividends included in dividend income, if any, are recorded at the fair market value of the securities received. Interest income 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 overdrafts, to the extent they are not offset by positive cash balances maintained by the Fund, based on the negative rolling average balance at an average Federal Funds Rate plus 0.50%. 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.

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

Federal Taxes. The Fund intends to comply with provisions of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its investment company taxable income, including any net realized gain on investments not

26      OPPENHEIMER DISCOVERY FUND

2. Significant Accounting Policies (Continued)

offset by capital loss carryforwards, if any, to shareholders. Therefore, no federal income or excise tax provision is required. The Fund files income tax returns in U.S. federal and applicable state jurisdictions. The statute of limitations on the Fund’s tax return filings generally remains open for the three preceding fiscal reporting period ends.

The tax components of capital shown in the following table represent distribution requirements the Fund must satisfy under the income tax regulations, losses the Fund may be able to offset against income and gains realized in future years and unrealized appreciation or depreciation of securities and other investments for federal income tax purposes.

Undistributed Net Investment Income1	Undistributed Long-Term Gain		Accumulated Loss Carryforward2,3,4		Net Unrealized Appreciation Based on cost of Securities and Other Investments for Federal Income Tax Purposes
$—	$	129,620,240	$	18,358,259	$	435,121,974

1. As of September 30, 2015, the Fund elected to defer $10,793,940 of late year ordinary losses.

2. At period end, the Fund had $18,358,259 of net capital loss carryforward available to offset future realized capital gains, if any, and thereby reduce future taxable gain distributions. Details of the capital loss carryforwards are included in the table below. Capital loss carryovers with no expiration, if any, must be utilized prior to those with expiration dates.

Expiring
2016	$	18,358,259

Of these losses, $18,358,259 are subject to loss limitation rules resulting from merger activity. These limitations generally reduce the utilization of these losses to a maximum of $18,358,259 per year.

3. During the reporting period, the Fund utilized $18,358,259 of capital loss carryforward to offset capital gains realized in that fiscal year.

4. During the previous reporting period, the Fund utilized $18,358,259 of capital loss carryforward to offset capital gains realized in that fiscal year.

Net investment income (loss) and net realized gain (loss) may differ for financial statement and tax purposes. The character of dividends and distributions made during the fiscal year from net investment income or net realized gains are determined in accordance with federal income tax requirements, which may differ from the character of net investment income or net realized gains presented in those financial statements in accordance with GAAP. Also, due to timing of dividends and distributions, the fiscal year in which amounts are distributed may differ from the fiscal year in which the income or net realized gain was recorded by the Fund.

Accordingly, the following amounts have been reclassified for the reporting period. Net assets of the Fund were unaffected by the reclassifications.

Reduction to Paid-in Capital	Reduction to Accumulated Net Investment Loss		Reduction to Accumulated Net Realized Gain on Investments5
$3,004,996	$	17,963,887	$	14,958,891

27      OPPENHEIMER DISCOVERY FUND

NOTES TO FINANCIAL STATEMENTS Continued

2. Significant Accounting Policies (Continued)

5. $14,958,891, all of which was long-term capital gain, was distributed in connection with Fund share redemptions.

The tax character of distributions paid during the reporting periods:

	Year Ended September 30, 2015		Year Ended September 30, 2014
Distributions paid from:
Long-term capital gain	$	189,930,528	$	175,096,473

The aggregate cost of securities and other investments and the composition of unrealized appreciation and depreciation of securities and other investments for federal income tax purposes at period end are noted in the following table. The primary difference between book and tax appreciation or depreciation of securities and other investments, if applicable, is attributable to the tax deferral of losses or tax realization of financial statement unrealized gain or loss.

Federal tax cost of securities	$	1,588,323,230
Gross unrealized appreciation	$	484,030,772
Gross unrealized depreciation		(48,908,798	)
Net unrealized appreciation	$	435,1212,974

Use of Estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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.

3. Securities Valuation

The Fund calculates the net asset value of its shares as of the close of the New York Stock Exchange (the “Exchange”), normally 4:00 P.M. Eastern time, on each day the Exchange is open for trading.

The Fund’s Board has adopted procedures for the valuation of the Fund’s securities and has delegated the day-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 its next regularly scheduled meeting covering the calendar quarter in which the fair valuation was determined.

Valuation Methods and Inputs

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

28      OPPENHEIMER DISCOVERY FUND

3. Securities Valuation (Continued)

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

Securities traded on a registered U.S. securities exchange (including exchange-traded derivatives other than futures and futures options) are valued based on the last sale price of the security reported on the principal exchange on which it is traded, prior to the time when the Fund’s assets are valued. In the absence of a sale, the security is valued at the mean between the bid and asked price on the principal exchange or, if not available from the principal exchange, obtained from two dealers. If bid and asked prices are not available from either the exchange or two dealers, the security is valued by using one of the following methodologies (listed in order of priority): (1) using a bid from the principal exchange, (2) the mean between the bid and asked price as provided by a single dealer, or (3) a bid from a single dealer. A security of a foreign issuer traded on a foreign exchange, but not listed on a registered U.S. securities exchange, is valued based on the last sale price on the principal exchange on which the security is traded, as identified by the third party pricing service used by the Manager, prior to the time when the Fund’s assets are valued. If the last sale price is unavailable, the security is valued at the most recent official closing price on the principal exchange on which it is traded. If the last sales price or official closing price for a foreign security is not available, the security is valued at the mean between the bid and asked price per the exchange or, if not available from the exchange, obtained from two dealers. If bid and asked prices are not available from either the exchange or two dealers, the security is valued by using one of the following methodologies (listed in order of priority): (1) using a bid from the exchange, (2) the mean between the bid and asked price as provided by a single dealer, or (3) a bid from a single dealer.

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, event-linked bonds, loans, 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.

Short-term money market type debt securities with a remaining maturity of sixty days or less are valued at cost adjusted by the amortization of discount or premium to maturity (amortized cost), which approximates market value. Short-term debt securities with a remaining maturity in excess of sixty days are valued at the mean between the “bid” and “asked” prices utilizing evaluated prices obtained from third party pricing services or broker-dealers.

A description of the standard inputs that may generally be considered by the third party pricing vendors in determining their evaluated prices is provided below.

Security Type	Standard inputs generally considered by third-party pricing vendors
Corporate debt, government debt, municipal, mortgage-backed and asset-backed securities	Reported trade data, broker-dealer price quotations, benchmark yields, issuer spreads on comparable securities, the credit quality, yield, maturity, and other appropriate factors.

29      OPPENHEIMER DISCOVERY FUND

NOTES TO FINANCIAL STATEMENTS Continued

3. Securities Valuation (Continued)

Security Type (Continued)	Standard inputs generally considered by third-party pricing vendors
Loans	Information obtained from market participants regarding reported trade data and broker-dealer price quotations.
Event-linked bonds	Information obtained from market participants regarding reported trade data and broker-dealer price quotations.

If a market value or price cannot be determined for a security using the methodologies described above, or if, in the “good faith” opinion of the Manager, the market value or price obtained does not constitute a “readily available market quotation,” or a significant event has occurred that would materially affect the value of the security, the security is 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. Fair value determinations by the Manager are subject to review, approval and ratification by the Fund’s Board at its next regularly scheduled meeting covering the calendar quarter in which the fair valuation was determined. Those fair valuation standardized 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.

To assess the continuing appropriateness of security valuations, the Manager, or its third party service provider who is subject to oversight by the Manager, regularly compares prior day prices, prices on comparable securities, and sale prices to the current day prices and challenges those prices exceeding certain tolerance levels with the third party pricing service or broker source. For those securities valued by fair valuations, whether through a standardized fair valuation methodology or a fair valuation determination, the Valuation Committee reviews and affirms the reasonableness of the valuations based on such methodologies and fair valuation determinations on a regular basis after considering all relevant information that is reasonably available.

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 are 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:

30      OPPENHEIMER DISCOVERY FUND

3. Securities Valuation (Continued)

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

2) Level 2-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) Level 3-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 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:
Common Stocks
Consumer Discretionary	$	427,090,256	$	—	$	—	$	427,090,256
Consumer Staples		30,135,435		—		—		30,135,435
Energy		31,752,518		—		—		31,752,518
Financials		165,361,534		—		—		165,361,534
Health Care		475,212,450		—		—		475,212,450
Industrials		238,059,738		—		—		238,059,738
Information Technology		522,263,741		—		—		522,263,741
Materials		30,078,133		—		—		30,078,133
Investment Company		103,491,399		—		—		103,491,399
Total Assets	$	2,023,445,204	$	—	$	—	$	2,023,445,204

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.

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 open-end management investment companies registered under the 1940 Act, as amended. The Manager is the investment adviser of, and the Sub-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.

31      OPPENHEIMER DISCOVERY FUND

NOTES TO FINANCIAL STATEMENTS Continued

4. Investments and Risks (Continued)

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.

Investment in Oppenheimer Institutional Money Market Fund. The Fund is permitted to invest daily available cash balances in a money market Affiliated Fund. The Fund may invest the available cash in Class E shares of Oppenheimer Institutional Money Market Fund (“IMMF”) to seek current income while preserving liquidity or for defensive purposes. IMMF is regulated as a money market fund under the Investment Company Act of 1940, as amended.

Equity Security Risk. Stocks and other equity securities fluctuate in price. The value of the Fund’s portfolio may be affected by changes in the equity markets generally. Equity markets may experience significant short-term volatility and may fall sharply at times. Different markets may behave differently from each other and U.S. equity markets may move in the opposite direction from one or more foreign stock markets. Adverse events in any part of the equity or fixed-income markets may have unexpected negative effects on other market segments.

The prices of individual equity securities generally do not all move in the same direction at the same time and a variety of factors can affect the price of a particular company’s securities. These factors may include, but are not limited to, poor earnings reports, a loss of customers, litigation against the company, general unfavorable performance of the company’s sector or industry, or changes in government regulations affecting the company or its industry.

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.

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.

32      OPPENHEIMER DISCOVERY FUND

5. Market Risk Factors (Continued)

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. Shares of Beneficial Interest

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

	Year Ended September 30, 2015						Year Ended September 30, 2014
	Shares			Amount			Shares			Amount
Class A
Sold		1,438,655		$	108,394,470			1,952,010		$	152,631,061
Dividends and/or distributions reinvested		1,657,187			115,903,648			1,467,648			111,776,053
Redeemed		(3,041,232	)		(226,275,487	)		(5,039,671	)		(379,468,033	)
Net increase (decrease)		54,610		$	(1,977,369	)		(1,620,013	)	$	(115,060,919	)
Class B
Sold		9,627		$	561,865			18,669		$	1,192,921
Dividends and/or distributions reinvested		91,813			4,935,863			98,545			5,972,839
Redeemed		(361,169	)		(20,748,860	)		(387,060	)		(23,710,476	)
Net decrease		(259,729	)	$	(15,251,132	)		(269,846	)	$	(16,544,716	)
Class C
Sold		254,157		$	15,171,968			293,605		$	18,787,931
Dividends and/or distributions reinvested		328,255			18,231,290			266,048			16,596,087
Redeemed		(587,469	)		(34,777,070	)		(653,482	)		(40,487,035	)
Net decrease		(5,057	)	$	(1,373,812	)		(93,829	)	$	(5,103,017	)

33      OPPENHEIMER DISCOVERY FUND

NOTES TO FINANCIAL STATEMENTS Continued

6. Shares of Beneficial Interest (Continued)

	Year Ended September 30, 2015						Year Ended September 30, 2014
	Shares			Amount			Shares			Amount
Class I
Sold		486,755		$	38,980,704			208,147		$	17,526,895
Dividends and/or distributions reinvested		58,340			4,489,219			41,333			3,419,479
Redeemed		(233,727	)		(19,011,494	)		(155,119	)		(12,717,619	)
Net increase		311,368		$	24,458,429			94,361		$	8,228,755
Class R1
Sold		139,489		$	9,947,264			161,959		$	11,976,216
Dividends and/or distributions reinvested		76,908			5,104,370			64,569			4,701,866
Redeemed		(237,023	)		(16,719,232	)		(250,829	)		(18,244,742	)
Net decrease		(20,626	)	$	(1,667,598	)		(24,301	)	$	(1,566,660	)
Class Y
Sold		2,357,847		$	195,991,612			2,995,969		$	251,026,367
Dividends and/or distributions reinvested		477,507			36,495,880			325,430			26,812,173
Redeemed		(2,608,892	)		(210,413,308	)		(2,417,410	)		(197,990,574	)
Net increase		226,462		$	22,074,184			903,989		$	79,847,966

1. Effective July 1, 2014, Class N shares were renamed Class R. See Note 1.

7. Purchases and Sales of Securities

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

	Purchases		Sales
Investment securities	$	1,814,761,749	$	1,994,664,910

8. 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 $200 million	0.75	%
Next $200 million	0.72
Next $200 million	0.69
Next $200 million	0.66
Next $700 million	0.60
Next $3.5 billion	0.58
Over $5 billion	0.55

The Fund’s effective management fee for the reporting period was 0.63% of average annual net assets before any applicable waivers.

34      OPPENHEIMER DISCOVERY FUND

8. Fees and Other Transactions with Affiliates (Continued)

Sub-Adviser Fees. The Manager has retained the Sub-Adviser to provide the day-to-day portfolio management of the Fund. Under the Sub-Advisory Agreement, the Manager pays the Sub-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 the Sub-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. Fees incurred and average net assets for each class 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 the day-to-day transfer agent and shareholder servicing of the Fund. Under the Sub-Transfer Agency Agreement, the Transfer Agent pays the Sub-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 the Sub-Transfer Agent is paid by the Transfer Agent, not by the Fund.

Trustees’ Compensation. The Fund has adopted an unfunded retirement plan (the “Plan”) for the Fund’s Independent Trustees. Benefits are based on years of service and fees paid to each Trustee during their period of service. The Plan was frozen with respect to adding new participants effective December 31, 2006 (the “Freeze Date”) and existing Plan Participants as of the Freeze Date will continue to receive accrued benefits under the Plan. Active Independent Trustees as of the Freeze Date have each elected a distribution method with respect to their benefits under the Plan. During the year ended September 30, 2015, the Fund’s projected benefit obligations, payments to retired Trustees and accumulated liability were as follows:

Projected Benefit Obligations Increased	$	11,806
Payments Made to Retired Trustees		27,261
Accumulated Liability as of September 30, 2015		199,867

The Fund’s Board of Trustees (“Board”) has adopted a compensation deferral plan for Independent Trustees that enables Trustees 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 Trustee under the plan, deferred amounts are treated as though equal dollar amounts had been invested in shares of the Fund or in other Oppenheimer funds selected by the Trustee. The Fund purchases shares of the funds selected for deferral by the Trustee 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 Trustees’ fees under the plan will not affect the net assets of the Fund and will not materially affect the

35      OPPENHEIMER DISCOVERY FUND

NOTES TO FINANCIAL STATEMENTS Continued

8. Fees and Other Transactions with Affiliates (Continued)

Fund’s assets, liabilities or net investment income per share. Amounts will be deferred until distributed in accordance with the compensation deferral plan.

Distribution and Service Plan (12b-1) Fees. Under its General Distributor’s Agreement with the Fund, OppenheimerFunds Distributor, Inc. (the “Distributor”) acts as the Fund’s principal underwriter in the continuous public offering of the Fund’s classes of shares.

Service Plan for Class A Shares. The Fund has adopted a Service Plan (the “Plan”) for Class A shares pursuant to Rule 12b-1 under the 1940 Act. Under the Plan, the Fund reimburses the Distributor for a portion of its costs incurred for services provided to accounts that hold Class A shares. Reimbursement is made periodically at an annual rate of up to 0.25% of the daily net assets of Class A shares of the Fund. The Distributor currently uses all of those fees to pay dealers, brokers, banks and other financial institutions periodically for providing personal service and maintenance of accounts of their customers that hold Class A shares. Any unreimbursed expenses the Distributor incurs with respect to Class A shares in any fiscal year cannot be recovered in subsequent periods. Fees incurred by the Fund under the Plan are detailed in the Statement of Operations.

Distribution and Service Plans for Class B, Class C and Class R Shares. The Fund has adopted Distribution and Service Plans (the “Plans”) for Class B, Class C and Class R shares pursuant to Rule 12b-1 under the 1940 Act to compensate the Distributor for distributing those share classes, maintaining accounts and providing shareholder services. Under the Plans, the Fund pays the Distributor an annual asset-based sales charge of 0.75% on Class B and Class C shares’ daily net assets and 0.25% on Class R shares’ daily net assets. The Fund also pays a service fee under the Plans at an annual rate of 0.25% of daily net assets. The Plans continue in effect from year to year only if the Fund’s Board of Trustees votes annually to approve their continuance at an in person meeting called for that purpose. Fees incurred by the Fund under the Plans are detailed in the Statement of Operations.

Sales Charges. Front-end sales charges and CDSC do not represent expenses of the Fund. They are deducted from the proceeds of sales of Fund shares prior to investment or from redemption proceeds prior to remittance, as applicable. The sales charges retained by the Distributor from the sale of shares and the CDSC retained by the Distributor on the redemption of shares is shown in the following table for the period indicated.

			Class A		Class B		Class C		Class R
	Class A		Contingent		Contingent		Contingent		Contingent
	Front-End		Deferred Sales		Deferred Sales		Deferred Sales		Deferred Sales
	Sales Charges		Charges		Charges		Charges		Charges
	Retained by		Retained by		Retained by		Retained by		Retained by
Year Ended	Distributor		Distributor		Distributor		Distributor		Distributor
September 30, 2015		$159,560		$3,165		$27,523		$3,934		$182

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

36      OPPENHEIMER DISCOVERY FUND

8. Fees and Other Transactions with Affiliates (Continued)

through the Fund’s investment in IMMF. During the reporting period, the Manager waived fees and/or reimbursed the Fund $60,764 for IMMF management fees.

Waivers and/or reimbursements may be modified or terminated as set forth according to the terms in the prospectus.

9. Borrowings and Other Financing

Joint Credit Facility. A number of mutual funds managed by the Manager participate in a $1.28 billion revolving credit facility (the “Facility”) intended to provide short-term financing, if necessary, subject to certain restrictions in connection with atypical redemption activity. Expenses and fees related to the Facility are paid by the participating funds and are disclosed separately or as other expenses on the Statement of Operations. The Fund did not utilize the Facility during the reporting period.

10. Pending Litigation

In 2009, several putative class action lawsuits were filed and later consolidated before the U.S. District Court for the District of Colorado against OppenheimerFunds, Inc. (“OFI”), OppenheimerFunds Distributor, Inc. (“OFDI”), and Oppenheimer Rochester California Municipal Fund, a fund advised by OFI Global Asset Management, Inc. and distributed by the Distributor (the “California Fund”), in connection with the California Fund’s investment performance. The plaintiffs asserted claims against OFI, OFDI and certain present and former trustees and officers of the California Fund under the federal securities laws, alleging, among other things, that the disclosure documents of the California Fund contained misrepresentations and omissions and the investment policies of the California Fund were not followed. Plaintiffs in the suit filed an amended complaint and defendants filed a motion to dismiss. In 2011, the court issued an order which granted in part and denied in part the defendants’ motion to dismiss. In 2012, plaintiffs filed a motion, which defendants opposed, to certify a class and appoint class representatives and class counsel. In March 2015, the court granted plaintiffs’ motion for class certification. In May 2015, the U.S. Court of Appeals for the Tenth Circuit vacated the class certification order and remanded the matter to the district court for further proceedings. In July 2015, the district court held an evidentiary hearing on plaintiffs’ motion for class certification.

OFI and OFDI believe the suit is without merit; that it is premature to render any opinion as to the likelihood of an outcome unfavorable to them in the suit; and that no estimate can yet be made as to the amount or range of any potential loss. Furthermore, OFI believes that the suit should not impair the ability of OFI or OFDI to perform their respective duties to the Fund and that the outcome of the suit should not have any material effect on the operations of any of the Oppenheimer funds.

37      OPPENHEIMER DISCOVERY FUND

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Trustees and Shareholders of Oppenheimer Discovery Fund:

We have audited the accompanying statement of assets and liabilities of Oppenheimer Discovery Fund, including the statement of investments, as of September 30, 2015, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the years in the two-year period then ended, and the financial highlights for each of the years or periods in the five-year period then ended. 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 conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). 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. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of September 30, 2015, by correspondence with the custodian, transfer agent and brokers, or by other appropriate auditing procedures where replies from brokers were not received. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Oppenheimer Discovery Fund as of September 30, 2015, the results of its operations for the year then ended, the changes in its net assets for each of the years in the two-year period then ended, and the financial highlights for each of the years or periods in the five-year period then ended, in conformity with U.S. generally accepted accounting principles.

KPMG LLP

Denver, Colorado

November 25, 2015

38      OPPENHEIMER DISCOVERY FUND

FEDERAL INCOME TAX INFORMATION Unaudited

In early 2015, if applicable, shareholders of record received information regarding all dividends and distributions paid to them by the Fund during calendar year 2014.

Capital gain distributions of $7.01258 per share were paid to Class A, Class B, Class C, Class I, Class R and Class Y shareholders, respectively, on December 3, 2014. Whether received in stock or in cash, the capital gain distribution should be treated by shareholders as a gain from the sale of the capital assets held for more than one year (long-term capital gains).

None of the dividends paid by the Fund during the reporting period are eligible for the corporate dividend-received deduction.

Dividends, if any, paid by the Fund during the reporting period which are not designated as capital gain distributions, may be eligible for lower individual income tax rates to the extent that the Fund has received qualified dividend income as stipulated by recent tax legislation. In early 2015, shareholders of record received information regarding the percentage of distributions that are eligible for lower individual income tax rates. The amount will be the maximum amount allowed.

The foregoing information is presented to assist shareholders in reporting distributions received from the Fund to the Internal Revenue Service. Because of the complexity of the federal regulations which may affect your individual tax return and the many variations in state and local tax regulations, we recommend that you consult your tax advisor for specific guidance.

39      OPPENHEIMER DISCOVERY FUND

BOARD APPROVAL OF THE FUND’S INVESTMENT ADVISORY AND

SUB-ADVISORY AGREEMENTS Unaudited

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 a sub-advisory agreement with OFI whereby OFI provides investment sub-advisory services to the Fund (collectively, the “Agreements”). Each year, the Board of Trustees (the “Board”), including a majority of the independent Trustees, 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 to in-person meetings focused on this evaluation, the Board receives information throughout the year regarding Fund services, fees, expenses and performance.

The Adviser, Sub-Adviser 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 the portfolio managers and the Sub-Adviser’s 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 the Sub-Adviser. OFI Global is also responsible for providing certain administrative services to the Fund as well. 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.

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

40      OPPENHEIMER DISCOVERY FUND

the Sub-Adviser has had 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 services and risk management, and information the Board has received regarding the experience and professional qualifications of the Managers’ key personnel and the size and functions of its staff. In its evaluation of the quality of the portfolio management services provided, the Board considered the experience of Ronald Zibelli, Jr. and Ash Shah, the portfolio managers for the Fund, and the Sub-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 renewal of the Fund’s service agreements. 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 the Sub-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 benchmarks or market indices and to the performance of other retail funds in the small growth category. The Board noted that the three-year, five-year and ten-year performance was better than its category median although its one-year performance was below its category median.

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 also considered the comparability of the fees charged and the services provided to the Fund to the fees and services for other clients or accounts advised by the Adviser. The independent consultant provided comparative data in regard to the fees and expenses of the Fund and other retail front-end load small growth funds with comparable asset levels and distribution features. The Board noted that the Fund’s contractual management fees and total expenses were lower than its peer group median and category median.

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 and sub-adviser, including the costs associated with the personnel and systems necessary 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 may 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

41      OPPENHEIMER DISCOVERY FUND

BOARD APPROVAL OF THE FUND’S INVESTMENT ADVISORY AND

SUB-ADVISORY AGREEMENTS Unaudited / Continued

indirect benefits the Managers receive as a result of their relationship with the Fund, including compensation paid to the Managers’ affiliates and research provided to the Adviser in connection with permissible brokerage arrangements (soft dollar arrangements).

Conclusions. These factors were also considered by the independent Trustees meeting separately from the full Board, assisted by experienced counsel to the Fund and to the independent Trustees. Fund counsel and the independent Trustees’ 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 Trustees, decided to continue the Agreements through September 30, 2016. 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.

42      OPPENHEIMER DISCOVERY FUND

PORTFOLIO PROXY VOTING POLICIES AND PROCEDURES;

UPDATES TO STATEMENTS OF INVESTMENTS Unaudited

The Fund has adopted Portfolio Proxy Voting Policies and Procedures 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 Procedures 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 Form N-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 Form N-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 Form N-Q. The Fund’s Form N-Q filings are available on the SEC’s website at www.sec.gov. Those forms may be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330.

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 at 1.800.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.

43      OPPENHEIMER DISCOVERY FUND

TRUSTEES 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 TRUSTEES	The address of each Trustee in the chart below is 6803 S. Tucson Way, Centennial, Colorado 80112-3924. Each Trustee serves for an indefinite term, or until his or her resignation, retirement, death or removal.
Brian F. Wruble, Chairman of the Board of Trustees (since 2007), Trustee (since 2005) Year of Birth: 1943	Director and Vice Chairman of Community Foundation of the Florida Keys (non- profit) (since July 2012); Trustee of the Board of Trustees, The Jackson Laboratory (non-profit) (1991-2011 and since May 2014); Chairman Emeritus (since August 2011) of The Jackson Laboratory (non-profit); Director of Special Value Opportunities Fund, LLC (registered investment company) (affiliate of the Sub-Adviser’s parent company) (since September 2004); Member of Zurich Insurance Group’s Investment Management Advisory Council (insurance) (since 2004); Treasurer (since 2007) and Trustee of the Institute for Advanced Study (non-profit educational institute) (since May 1992); General Partner of Odyssey Partners, L.P. (hedge fund) (September 1995-December 2007); Special Limited Partner of Odyssey Investment Partners, LLC (private equity investment) (January 1999-September 2004). Oversees 53 portfolios in the OppenheimerFunds complex. Mr. Wruble has served on the Boards of certain Oppenheimer funds since April 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 Boards’ deliberations.
David K. Downes, Trustee (since 2007) Year of Birth: 1940	Director of THL Credit Inc. (since June 2009); Chief Executive Officer and Board Member of Community Capital Management (investment management company) (since January 2004); President of The Community Reinvestment Act Qualified Investment Fund (investment management company) (since 2004); Director of Actua Corporation (information technology company) (since October 2003); formerly, Independent Chairman GSK Employee Benefit Trust (April 2006- June 2013); Director of Correctnet (January 2006-2007); Independent Chairman of the Board of Trustees of Quaker Investment Trust (registered investment company) (2004-2007); Chief Operating Officer and Chief Financial Officer of Lincoln National Investment Companies, Inc. (subsidiary of Lincoln National Corporation, a publicly traded company) and Delaware Investments U.S., Inc. (investment management subsidiary of Lincoln National Corporation) (1993-2003); President, Chief Executive Officer and Trustee of Delaware Investment Family of Funds (1993-2003); President and Board Member of Lincoln National Convertible Securities Funds, Inc. and the Lincoln National Income Funds, TDC (1993-2003); Chairman and Chief Executive Officer of Retirement Financial Services, Inc. (registered transfer agent and investment adviser and subsidiary of Delaware Investments U.S., Inc.) (1993-2003); President and Chief Executive Officer of Delaware Service Company, Inc. (1995-2003); Chief Administrative Officer, Chief Financial Officer, Vice Chairman and Director of Equitable Capital Management Corporation (investment subsidiary of Equitable Life Assurance Society) (1985-1992); Corporate Controller of Merrill Lynch Company (financial services holding company) (1977-1985); held the following positions at the Colonial Penn Group, Inc. (insurance company): Corporate Budget Director (1974-1977), Assistant Treasurer (1972-1974) and Director of Corporate Taxes (1969-1972); held the following positions at Price Waterhouse Company (financial services firm): Tax Manager (1967-1969), Tax Senior (1965-1967) and Staff Accountant (1963-1965); United States Marine Corps (1957-1959).

44      OPPENHEIMER DISCOVERY FUND

David K. Downes, Continued	Oversees 53 portfolios in the OppenheimerFunds complex. Mr. Downes has served on the Boards of certain Oppenheimer funds since December 2005, 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 Boards’ deliberations.
Matthew P. Fink, Trustee (since 2005) Year of Birth: 1941	Trustee of the Committee for Economic Development (policy research foundation) (2005-2011); Director of ICI Education Foundation (education foundation) (October 1991-August 2006); President of the Investment Company Institute (trade association) (October 1991-June 2004); Director of ICI Mutual Insurance Company (insurance company) (October 1991-June 2004); Author of The Rise of Mutual Funds: An Insider’s View published by Oxford University Press (second edition 2010). Oversees 53 portfolios in the OppenheimerFunds complex. Mr. Fink has served on the Boards of certain Oppenheimer funds since January 2005, 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 Boards’ deliberations.
Edmund P. Giambastiani, Jr., Trustee (since 2013) Year of Birth: 1948	Advisory Board Member of the Maxwell School of Citizenship and Public Affairs of Syracuse University (since April 2012); Director of Mercury Defense Systems Inc. (information technology) (August 2011-February 2013); Trustee of the U.S. Naval Academy Foundation (since November 2010); Advisory Board Member of the Massachusetts Institute of Technology Lincoln Laboratory (federally-funded research development center) (since May 2010); Director of The Boeing Company (aerospace and defense) (since October 2009); Trustee of MITRE Corporation (federally-funded research development center) (since September 2008); Independent Director of QinetiQ Group Plc (defense technology and security) (February 2008-August 2011); Director of Monster Worldwide, Inc. (on- line career services) (since January 2008, Lead Director since June 2011); Chairman of Alenia North America, Inc. (military and defense products) (January 2008-October 2009); Director of SRA International, Inc. (information technology and services) (January 2008-July 2011); President of Giambastiani Group LLC (national security and energy consulting) (since October 2007); United States Navy, career nuclear submarine officer (June 1970-October 2007), Vice Chairman of the Joint Chiefs of Staff (2005-October 2007), Supreme Allied Commander of NATO Commander Transformation (2003-2005), Commander, U.S. Joint Forces Command (2002-2005). Since his retirement from the U.S. Navy in October 2007, Admiral Giambastiani has also served on numerous U.S. Government advisory boards, investigations and task forces for the Secretaries of Defense, State and Interior and the Central Intelligence Agency. Oversees 53 portfolios in the OppenheimerFunds complex. Admiral Giambastiani has served on the Boards of certain Oppenheimer funds since February 2013, including as an Advisory Board Member for certain Oppenheimer funds, 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 Boards’ deliberations. For purposes of this report, Admiral Giambastiani is identified as a Trustee.
Elizabeth Krentzman, Trustee (since 2014) Year of Birth: 1959	Advisory Board Member of the Securities and Exchange Commission Historical Society (since 2007); held the following positions at Deloitte & Touche LLP: Principal and Chief Regulatory Advisor for Asset Management Services (2007 - 2014) and U.S. Mutual Fund Leader (2011 - 2014); General Counsel of the Investment Company Institute (trade association) (June 2004 - April 2007); held

45      OPPENHEIMER DISCOVERY FUND

TRUSTEES AND OFFICERS Unaudited / Continued

Elizabeth Krentzman, Continued	the following positions at Deloitte & Touche LLP: National Director of the Investment Management Regulatory Consulting Practice (1997 - 2004), Principal (2003 - 2004), Director (1998 - 2003) and Senior Manager (1997 - 1998); Assistant Director of the Division of Investment Management - Office of Disclosure and Investment Adviser Regulation (1996 - 1997) and various positions with the Division of Investment Management – Office of Regulatory Policy (1991 - 1996) of the U.S. Securities and Exchange Commission; Associate at Ropes & Gray (1987 - 1991); former Chair of the Investment Management Subcommittee of the Washington, D.C. Bar. Oversees 53 portfolios in the OppenheimerFunds complex. Ms. Krentzman has served on the Boards of certain Oppenheimer funds since August 2014, 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 Boards’ deliberations.
Mary F. Miller, Trustee (since 2004) Year of Birth: 1942	Trustee of International House (not-for-profit) (since June 2007); Trustee of the American Symphony Orchestra (not-for-profit) (October 1998-November 2011); and Senior Vice President and General Auditor of American Express Company (financial services company) (July 1998-February 2003). Oversees 53 portfolios in the OppenheimerFunds complex. Ms. Miller has served on the Boards of certain Oppenheimer funds since August 2004, 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 Boards’ deliberations.
Joel W. Motley, Trustee (since 2002) Year of Birth: 1952	Director of Greenwall Foundation (since October 2013); Member of the Vestry of Trinity Wall Street (since April 2012); Director of Southern Africa Legal Services Foundation (since March 2012); Board Member of Pulitzer Center for Crisis Reporting (non-profit journalism) (since March 2011); Managing Director of Public Capital Advisors, LLC (privately-held financial advisor) (since January 2006); Managing Director of Carmona Motley, Inc. (privately-held financial advisor) (since January 2002); Director of Columbia Equity Financial Corp. (privately-held financial advisor) (2002-2007); Managing Director of Carmona Motley Hoffman Inc. (privately-held financial advisor) (January 1998-December 2001); Member of the Finance and Budget Committee of the Council on Foreign Relations, Member of the Investment Committee and Board of Human Rights Watch (since July 2000) and Member of the Investment Committee and Board of Historic Hudson Valley (since February 2010). Oversees 53 portfolios in the OppenheimerFunds complex. Mr. Motley has served on the Boards of certain Oppenheimer funds since October 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 Boards’ deliberations.
Joanne Pace, Trustee (since 2012) Year of Birth: 1958	Board Director of Horizon Blue Cross Blue Shield of New Jersey (since November 2012); Advisory Board Director of The Alberleen Group LLC (since March, 2012); Advisory Council Member of 100 Women in Hedge Funds (non-profit) (since December, 2012); Advisory Council Member of Morgan Stanley Children’s Hospital (non-profit) (since May, 2012); Board Director of The Komera Project (non-profit) (since April, 2012); Advisory Board Director of The Agile Trading Group LLC (2012-2013); New York Advisory Board Director of Peace First (non-profit) (2010-2013); Senior Advisor of SECOR Asset Management, LP (2010-2011); Managing Director and Chief Operating Officer of Morgan Stanley Investment Management (2006-2010); Partner and Chief Operating Officer of

46      OPPENHEIMER DISCOVERY FUND

Joanne Pace, Continued	FrontPoint Partners, LLC (hedge fund) (2005-2006); held the following positions at Credit Suisse: Managing Director (2003-2005); Global Head of Human Resources and member of Executive Board and Operating Committee (2004- 2005), Global Head of Operations and Product Control (2003-2004); held the following positions at Morgan Stanley: Managing Director (1997-2003), Controller and Principal Accounting Officer (1999-2003); Chief Financial Officer (temporary assignment) for the Oversight Committee, Long Term Capital Management (1998-1999). Lead Independent Director and Chair of the Audit and Nominating Committee of The Global Chartist Fund, LLC of Oppenheimer Asset Management (2011-2012); Board Director of Managed Funds Association (2008-2010); Board Director of Morgan Stanley Foundation (2007-2010) and Investment Committee Chair (2008-2010). Oversees 53 portfolios in the OppenheimerFunds complex. Ms. Pace has served on the Boards of certain Oppenheimer funds since November 2012, including as an Advisory Board Member for certain Oppenheimer funds, 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. For purposes of this report, Ms. Pace is identified as a Trustee.
Daniel Vandivort, Trustee (since 2014) Year of Birth: 1954	Chairman and Lead Independent Director/Trustee (March 2010-September 2014), Chairman of the Audit Committee (March 2009-September 2014) and Director/Trustee (December 2008-September 2014) of the Board of Directors/Trustees of Value Line Funds; Trustee, Board of Trustees of Huntington Disease Foundation of America (June 2007-December 2013): Trustee, Board of Trustees, RIM Retirement Savings Plan (2005-2007); President and Chief Investment Officer, Robeco Investment Management, formerly known as Weiss Peck and Greer (January 2005-June 2007); Member, Management Committee of Robeco Investment Management (2001-2007); Chairman and Trustee of the Board of Trustees of Weiss, Peck and Greer Funds (2004-2005); Managing Director and Head of Fixed Income, Weiss, Peck and Greer (November 1994-January 2005); Managing Director and Head of Fixed Income, CS First Boston Investment Management (January 1992-November 1994); Director, Global Product Development, First Boston Asset Management (November 1989-January 1992); Vice President, Fixed Income Sales, First Boston Corp. (May 1984- November 1989). Oversees 53 portfolios in the OppenheimerFunds complex. Mr. Vandivort has served on the Boards of certain Oppenheimer funds since 2014, 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 Boards’ deliberations.
INTERESTED TRUSTEES	Mr. Glavin is an “Interested Trustee” because he is affiliated with the Manager and the Sub-Adviser by virtue of his positions as director of the Sub-Adviser, and as a shareholder of the Sub-Adviser’s parent company. As a Trustee, he serves for an indefinite term, or until his resignation, retirement, death or removal. Mr. Glavin’s address is 225 Liberty Street, New York, New York 10281-1008. Mr. Steinmetz is an “Interested Trustee” because he is affiliated with the Manager and the Sub-Adviser by virtue of his positions as Chairman of the Sub-Adviser and officer and director of the Manager. Both as a Trustee 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.

47      OPPENHEIMER DISCOVERY FUND

TRUSTEES AND OFFICERS Unaudited / Continued

William F. Glavin, Jr., Trustee (since 2013), Year of Birth: 1958

Chairman of the Sub-Adviser (July 2014-December 2014 and December 2009-December 2012) and Director of the Sub-Adviser (since January 2009); Chairman, Director and Chief Executive Officer (January 2013-June 2014) of the Manager; President of the Manager (January 2013-May 2013); Chief Executive Officer (January 2009-December 2012); President of the Sub-Adviser (May 2009-December 2012); Management Director (June 2009-June 2014), President (December 2009-June 2014) and Chief Executive Officer (January 2011-June 2014) of Oppenheimer Acquisition Corp. (“OAC”) (the Sub-Adviser’s parent holding company); Director of Oppenheimer Real Asset Management, Inc. (March 2010-June 2014); Executive Vice President (March 2006-February 2009) and Chief Operating Officer (July 2007-February 2009) of Massachusetts Mutual Life Insurance Company (OAC’s parent company); Director (May 2004-March 2006) and Chief Operating Officer and Chief Compliance Officer (May 2004- January 2005), President (January 2005-March 2006) and Chief Executive Officer (June 2005-March 2006) of Babson Capital Management LLC; Director (March 2005-March 2006), President (May 2003-March 2006) and Chief Compliance Officer (July 2005-March 2006) of Babson Capital Securities, Inc. (a broker-dealer); President (May 2003-March 2006) of Babson Investment Company, Inc.; Director (May 2004-August 2006) of Babson Capital Europe Limited; Director (May 2004-October 2006) of Babson Capital Guernsey Limited; Director (May 2004-March 2006) of Babson Capital Management LLC; Non-Executive Director (March 2005-March 2007) of Baring Asset Management Limited; Director (February 2005-June 2006) Baring Pension Trustees Limited; Director and Treasurer (December 2003-November 2006) of Charter Oak Capital Management, Inc.; Director (May 2006-September 2006) of C.M. Benefit Insurance Company; Director (May 2008-June 2009) and Executive Vice President (June 2007-July 2009) of C.M. Life Insurance Company; President (March 2006-May 2007) of MassMutual Assignment Company; Director (January 2005-December 2006), Deputy Chairman (March 2005-December 2006) and President (February 2005-March 2005) of MassMutual Holdings (Bermuda) Limited; Director (May 2008-June 2009) and Executive Vice President (June 2007-July 2009) of MML Bay State Life Insurance Company; Chief Executive Officer and President (April 2007-January 2009) of MML Distributors, LLC; and Chairman (March 2006-December 2008) and Chief Executive Officer (May 2007-December 2008) of MML Investors Services, Inc. An officer of 91 portfolios in the OppenheimerFunds complex. Mr. Glavin has served on the Boards of certain Oppenheimer funds since December 2009, 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 Boards’ deliberations.

Arthur P. Steinmetz, Trustee (since 2015), President and Principal Executive Officer (since 2014) Year of Birth: 1958

Chairman of the Sub-Adviser (since January 2015); CEO and Chairman of the Manager (since July 2014), President of the Manager (since May 2013), a Director of the Manager (since January 2013), Director of the Sub-Adviser (since July 2014), President, Management Director and CEO of Oppenheimer Acquisition Corp. (the Sub-Adviser’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 from (January 2013-December 2013); Executive Vice President of the Manager (January 2013-May 2013); Chief Investment Officer of the Sub-Adviser (October 2010-December 2012); Chief Investment Officer, Fixed-Income, of the Sub-Adviser (April 2009-October 2010); Executive Vice President of the Sub-Adviser (October

48      OPPENHEIMER DISCOVERY FUND

Arthur P. Steinmetz, Continued	2009-December 2012); Director of Fixed Income of the Sub-Adviser (January 2009-April 2009); and a Senior Vice President of the Sub-Adviser (March 1993-September 2009). An officer of 91 portfolios in the OppenheimerFunds complex.
OTHER OFFICERS OF THE FUND	The addresses of the Officers in the chart below are as follows: for Messrs. Zibelli, Jr., Shah, Gabinet, Mss. Sexton and Picciotto, 225 Liberty Street, New York, New York 10281-1008, for Mr. Wixted, 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.
Ronald J. Zibelli, Jr., Vice President (since 2006) Year of Birth: 1959	Senior Vice President of the Sub-Adviser (since January 2014); Senior Portfolio Manager of the Sub-Adviser (since May 2006) and Vice President of the Sub-Adviser (May 2006-January 2014). Prior to joining the Sub-Adviser, he spent six years at Merrill Lynch Investment Managers, during which time he was a Managing Director and Small Cap Growth Team Leader, responsible for managing 11 portfolios. Prior to joining Merrill Lynch Investment Managers, Mr. Zibelli spent 12 years with Chase Manhattan Bank, including two years as Senior Portfolio Manager (U.S. Small Cap Equity) at Chase Asset Management. A portfolio manager and officer of other portfolios in the OppenheimerFunds complex.
Ash Shah, Vice President (since 2014) Year of Birth: 1969	Senior Portfolio Manager of the Sub-Adviser (since February 2014) and a Vice President of the Sub-Adviser (since May 2006). Senior Research Analyst of the Sub-Adviser (February 2006-February 2014). Prior to joining the Sub-Adviser, Mr. Shah was a Vice President and Senior Analyst with Merrill Lynch Investment Managers. Prior to that, he was a Vice President and Senior Analyst with BlackRock Financial Management. A portfolio manager and officer in the OppenheimerFunds complex.
Arthur S. Gabinet, Secretary and Chief Legal Officer (since 2011) Year of Birth: 1958	Executive Vice President, Secretary and General Counsel of the Manager (since January 2013); General Counsel OFI SteelPath, Inc. (since January 2013); Executive Vice President (May 2010-December 2012) and General Counsel (since January 2011) of the Sub-Adviser; General Counsel of the Distributor (since January 2011); General Counsel of Centennial Asset Management Corporation (January 2011-December 2012); Executive Vice President (January 2011-December 2012) and General Counsel of HarbourView Asset Management Corporation (since January 2011); Assistant Secretary (since January 2011) and Director (since January 2011) of OppenheimerFunds International Ltd. and OppenheimerFunds plc; Director of Oppenheimer Real Asset Management, Inc. (January 2011-December 2012) and General Counsel (since January 2011); Executive Vice President (January 2011-December 2011) and General Counsel of Shareholder Financial Services, Inc. and Shareholder Services, Inc. (since January 2011); Executive Vice President (January 2011-December 2012) and General Counsel of OFI Private Investments Inc. (since January 2011); Vice President of OppenheimerFunds Legacy Program (January 2011-December 2011); Executive Vice President (January 2011-December 2012) and General Counsel of OFI Institutional Asset Management, Inc. (since January 2011); General Counsel, Asset Management of the Sub-Adviser (May 2010-December 2010); Principal, The Vanguard Group (November 2005-April 2010); District Administrator, U.S. Securities and Exchange Commission (January 2003-October 2005). An officer of 91 portfolios in the OppenheimerFunds complex.

49      OPPENHEIMER DISCOVERY FUND

TRUSTEES AND OFFICERS Unaudited / Continued

Jennifer Sexton, 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 the Sub-Adviser (January 1998-March 2006); Assistant Vice President of the Sub-Adviser (October 1991-December 1998). An officer of 91 portfolios in the OppenheimerFunds complex.
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 the Manager (since March 2014); Chief Compliance Officer of the Sub-Adviser, OFI SteelPath, Inc., OFI Global Trust Company, 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). An officer of 91 portfolios in the OppenheimerFunds complex.
Brian W. Wixted, Treasurer and Principal Financial & Accounting Officer (since 1999) Year of Birth: 1959	Senior Vice President of the Manager (since January 2013); Treasurer of the Sub-Adviser, HarbourView Asset Management Corporation, Shareholder Financial Services, Inc., Shareholder Services, Inc., and Oppenheimer Real Asset Management, Inc. (March 1999-June 2008), OFI Private Investments, Inc. (March 2000-June 2008), OppenheimerFunds International Ltd. and OppenheimerFunds plc (since May 2000), OFI Institutional Asset Management, Inc. (November 2000-June 2008), and OppenheimerFunds Legacy Program (charitable trust program established by the Sub-Adviser) (June 2003-December 2011); Treasurer and Chief Financial Officer of OFI Trust Company (since May 2000); Assistant Treasurer of Oppenheimer Acquisition Corporation (March 1999-June 2008). An officer of 91 portfolios in the OppenheimerFunds complex.

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

50      OPPENHEIMER DISCOVERY FUND

OPPENHEIMER DISCOVERY FUND

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
Legal Counsel	Kramer Levin Naftalis & Frankel LLP

^© 2015 OppenheimerFunds, Inc. All rights reserved.

51      OPPENHEIMER DISCOVERY FUND

PRIVACY POLICY NOTICE

As an Oppenheimer fund shareholder, you are entitled to know how we protect your personal information and how we limit its disclosure.

Information Sources

We obtain nonpublic personal information about our shareholders from the following sources:

• Applications or other forms

• When you create a user ID and password for online account access

• When you enroll in eDocs Direct, our electronic document delivery service

• Your transactions with us, our affiliates or others

• A software program on our website, often referred to as a “cookie,” which indicates which parts of our site you’ve visited

• When you set up challenge questions to reset your password online

If you visit oppenheimerfunds.com and do not log on to the secure account information areas, we do not obtain any personal information about you. When you do log on to a secure area, we do obtain your user ID and password to identify you. We also use this information to provide you with products and services you have requested, to inform you about products and services that you may be interested in and assist you in other ways.

We do not collect personal information through our website unless you willingly provide it to us, either directly by email or in those areas of the website that request information. In order to update your personal information (including your mailing address, email address and phone number) you must first log on and visit your user profile.

If you have set your browser to warn you before accepting cookies, you will receive the warning message with each cookie. You can refuse cookies by turning them off in your browser. However, doing so may limit your access to certain sections of our website.

We use cookies to help us improve and manage our website. For example, cookies help us recognize new versus repeat visitors to the site, track the pages visited, and enable some special features on the website. This data helps us provide a better service for our website visitors.

Protection of Information

We do not disclose any non-public personal information (such as names on a customer list) about current or former customers to anyone, except as permitted by law.

Disclosure of Information

Copies of confirmations, account statements and other documents reporting activity in your fund accounts are made available to your financial advisor (as designated by you). We may also use details about you and your investments to help us, our financial service affiliates, or firms that jointly market their financial products and services with ours, to better serve your investment needs or suggest financial services or educational material that may be of interest to you. If this requires us to provide you with an opportunity to “opt in” or “opt out” of such information sharing with a firm not affiliated with us, you will receive notification on how to do so, before any such sharing takes place.

Right of Refusal

We will not disclose your personal information to unaffiliated third parties (except as permitted by law), unless we first offer you a reasonable opportunity to refuse or “opt out” of such disclosure.

52      OPPENHEIMER DISCOVERY FUND

PRIVACY POLICY NOTICE Continued

Internet Security and Encryption

In general, the email services provided by our website are encrypted and provide a secure and private means of communication with us. To protect your own privacy, confidential and/or personal information should only be communicated via email when you are advised that you are using a secure website. As a security measure, we do not include personal or account information in non-secure emails, and we advise you not to send such information to us in non-secure emails. Instead, you may take advantage of the secure features of our website to encrypt your email correspondence. To do this, you will need to use a browser that supports Secure Sockets Layer (SSL) protocol.

We do not guarantee or warrant that any part of our website, including files available for download, are free of viruses or other harmful code. It is your responsibility to take appropriate precautions, such as use of an anti-virus software package, to protect your computer hardware and software.

• All transactions, including redemptions, exchanges and purchases, are secured by SSL and 256-bit encryption. SSL is used to establish a secure connection between your PC and OppenheimerFunds’ server. It transmits information in an encrypted and scrambled format.

• Encryption is achieved through an electronic scrambling technology that uses a “key” to code and then decode the data. Encryption acts like the cable converter box you may have on your television set. It scrambles data with a secret code so that no one can make sense of it while it is being transmitted. When the data reaches its destination, the same software unscrambles the data.

• You can exit the secure area by either closing your browser, or for added security, you can use the Log Out button before you close your browser.

Other Security Measures

We maintain physical, electronic and procedural safeguards to protect your personal account information. Our employees and agents have access to that information only so that they may offer you products or provide services, for example, when responding to your account questions.

How You Can Help

You can also do your part to keep your account information private and to prevent unauthorized transactions. If you obtain a user ID and password for your account, do not allow it to be used by anyone else. Also, take special precautions when accessing your account on a computer used by others.

Who We Are

This joint notice describes the privacy policies of the Oppenheimer funds, OppenheimerFunds, Inc., each of its investment adviser subsidiaries, OppenheimerFunds Distributor, Inc. and OFI Global Trust Co. It applies to all Oppenheimer fund accounts you presently have, or may open in the future, using your Social Security number—whether or not you remain a shareholder of our funds. This notice was last updated March 2015. In the event it is updated or changed, we will post an updated notice on our website at oppenheimerfunds.com. If you have any questions about this privacy policy, write to us at P.O. Box 5270, Denver, CO 80217-5270, email us by clicking on the Contact Us section of our website at oppenheimerfunds.com or call us at 1.800.CALL OPP (225.5677).

53      OPPENHEIMER DISCOVERY FUND

THIS PAGE INTENTIONALLY LEFT BLANK.

54      OPPENHEIMER DISCOVERY FUND

THIS PAGE INTENTIONALLY LEFT BLANK.

55      OPPENHEIMER DISCOVERY FUND

	Visit us at oppenheimerfunds.com for 24-hr access to account information and transactions or call us at 800 CALL OPP (800 225 5677) for 24-hr automated information and automated transactions. Representatives also available Mon–Fri 8am–8pm ET.
Visit Us oppenheimerfunds.com Call Us 800 225 5677 Follow Us
	Oppenheimer funds are distributed by OppenheimerFunds Distributor, Inc. 225 Liberty Street, New York, NY 10281-1008 © 2015 OppenheimerFunds Distributor, Inc. All rights reserved. RA0500.001.0915     November 23, 2015

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 Trustees of the registrant has determined that David Downes, the Board’s Audit Committee Chairman, is an audit committee financial expert and that Mr. Downes 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 $23,700 in fiscal 2015 and $22,600 in fiscal 2014.

(b) Audit-Related Fees

The principal accountant for the audit of the registrant’s annual financial statements billed no such fees in fiscal 2015 and no such fees in fiscal 2014.

The principal accountant for the audit of the registrant’s annual financial statements billed $185,479 in fiscal 2015 and $1,042,959 in fiscal 2014 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, system conversion testing, and corporate restructuring

(c) Tax Fees

The principal accountant for the audit of the registrant’s annual financial statements billed no such fees in fiscal 2015 and no such fees in fiscal 2014.

The principal accountant for the audit of the registrant’s annual financial statements billed $628,126 in fiscal 2015 and $467,462 in fiscal 2014 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 2015 and no such fees in fiscal 2014.

The principal accountant for the audit of the registrant’s annual financial statements billed no such fees in fiscal 2015 and no such fees in fiscal 2014 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 Trustees.

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

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

Under applicable laws, pre-approval of non-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 as non-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 $813,605 in fiscal 2015 and $1,510,421 in fiscal 2014 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 to non-audit fees. Those billings did not include any prohibited non-audit services as defined by the Securities Exchange Act of 1934.

(h) The registrant’s audit committee of the board of Trustees has considered whether the provision of non-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 not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-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 Form N-CSR.

b) Not applicable.

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

Not applicable.

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

Not applicable.

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

Not applicable.

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

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 rule 30a-3(c) under the Investment Company Act of 1940 (17 CFR 270.30a-3(c)) as of 9/30/2015, 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. Exhibits.

(a) (1) Exhibit attached hereto.

(2) Exhibits attached hereto.

(3) Not applicable.

(b) Exhibit 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 Discovery Fund

By:	/s/ Arthur P. Steinmetz
	Arthur P. Steinmetz
	Principal Executive Officer
Date:	11/17/2015

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:	11/17/2015
By:	/s/ Brian W. Wixted
	Brian W. Wixted
	Principal Financial Officer
Date:	11/17/2015

EX-99.CODE ETH

CODE OF ETHICS FOR PRINCIPAL EXECUTIVE AND FINANCIAL OFFICERS OF

THE OPPENHEIMER FUNDS, OPPENHEIMERFUNDS, INC., OFI GLOBAL ASSET

MANAGEMENT, INC. AND OFI STEELPATH, INC.

This Code of Ethics for Principal Executive and Financial Officers (referred to in this document as the “Code”) has been adopted by each of the investment companies for which OppenheimerFunds, Inc. (“OFI”), OFI Global Asset Management, Inc. (“OFI Global”) , OFI SteelPath, Inc. (“OFI SteelPath”) or one of OFI’s other subsidiaries (referred to collectively in this document as “OFI”) acts as investment adviser (individually, a “Fund” and collectively, the “Funds”), and by OFI to effectuate compliance with Section 406 under the Sarbanes-Oxley Act of 2002 and the rules adopted to implement Section 406.

This Code applies to OFI’s and each Fund’s principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions (“Covered Officers”). A listing of positions currently within the ambit of Covered Officers is attached as Exhibit A.¹

INTRODUCTION / DEFINITION / POLICY STATEMENT:

In general, the principles that govern honest and ethical conduct, including the avoidance of conflicts of interest between personal and professional relationships, reflect, at the minimum, the following: (1) the duty at all times in performing any responsibilities as a Fund financial officer, controller, accountant or principal executive officer to place the interests of the Funds ahead of personal interests; (2) the fundamental standard that Covered Officers should not take inappropriate advantage of their positions; (3) the duty to assure that a Fund’s financial statements and reports to its shareholders are prepared honestly and accurately in accordance with applicable rules, regulations and accounting standards; and (4) the duty to conduct the Funds’ business and affairs in an honest and ethical manner. Each Covered Officer should be sensitive to situations that may give rise to actual as well as apparent conflicts of interest.

It is acknowledged that, as a result of the contractual relationship between each Fund and OFI, of which the Covered Officers are also officers or employees, and subject to OFI’s fiduciary duties to each Fund, the Covered Officers may, in the normal course of their duties, be involved in establishing policies and implementing decisions that will have different effects on OFI and the Funds. It is further acknowledged that the participation of the Covered Officers in such activities is inherent in the contractual relationship between each Fund and OFI and is consistent with the expectations of the Board of Trustees/Directors of the performance by the Covered Officers of their duties as officers of the Funds.

POLICY DETAILS:

1. Prohibitions

¹ The obligations imposed by this Code on Covered Officers are separate from and in addition to any obligations that may be imposed on such persons as Covered Persons under the Code of Ethics adopted by OFI and the Funds under Rule 17j-1 of the Investment Company Act of 1940, as amended and any other code of conduct applicable to Covered Officers in whatever capacity they serve. This Code does not incorporate by reference any provisions of the Rule 17j-1 Code of Ethics and accordingly, any violations or waivers granted under the Rule 17j-1 Code of Ethics will not be considered a violation or waiver under this Code.

The specific provisions and reporting requirements of this Code are concerned primarily with promoting honest and ethical conduct and avoiding conflicts of interest in personal and professional relationships. No Covered Officer may use information concerning the business and affairs of a Fund, including the investment intentions of a Fund, or use his or her ability to influence such investment intentions, for personal gain to himself or herself, his or her family or friends or any other person or in a manner detrimental to the interests of a Fund or its shareholders.

No Covered Officer may use his or her personal influence or personal relationships to influence the preparation and issuance of financial reports of a Fund whereby the Covered Officer would benefit personally to the detriment of the Fund and its shareholders.

No Covered Officer shall intentionally for any reason take any action or fail to take any action in connection with his or her official acts on behalf of a Fund that causes the Fund to violate applicable laws, rules and regulations.

No Covered Officer shall, in connection with carrying out his or her official duties and responsibilities on behalf of a Fund:

(i) employ any device, scheme or artifice to defraud a Fund or its shareholders;

(ii) intentionally cause a Fund to make any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements made, in light of the circumstances under which they are made, not misleading in its official documents, regulatory filings, financial statements or communications to the public;

(iii) engage in any act, practice, or course of business which operates or would operate as a fraud or deceit upon any Fund or its shareholders;

(iv) engage in any manipulative practice with respect to any Fund;

(v) use his or her personal influence or personal relationships to influence any business decision, investment decisions, or financial reporting by a Fund whereby the Covered Officer would benefit personally to the detriment of the Fund or its shareholders;

(vi) intentionally cause a Fund to fail to comply with applicable laws, rules and regulations, including failure to comply with the requirement of full, fair, accurate, understandable and timely disclosure in reports and documents that a Fund files with, or submits to, the SEC and in other public communications made by the Fund;

(vii) intentionally mislead or omit to provide material information to the Fund’s independent auditors or to the Board of Trustees/Directors or the officers of the Fund or its investment adviser in connection with financial reporting matters;

(viii) fail to notify the Code Administrator or the Chief Executive Officer of the Fund or its investment adviser promptly if he or she becomes aware of any existing or potential violations of this Code or applicable laws;

(ix) retaliate against others for, or otherwise discourage the reporting of, actual or apparent violations of this Code; or

(x) fail to acknowledge or certify compliance with this Code if requested to do so.

2. Reports of Conflicts of Interests

If a Covered Officer becomes aware of a conflict of interest under this Code or, to the Covered Officer’s reasonable belief, the appearance of one, he or she must immediately report the matter to the Code’s Administrator. If the Code Administrator is involved or believed to be involved in the conflict of interest or appearance of conflict of interest, the Covered Officer shall report the matter directly to the Chief Executive Officer of OFI Global.

Upon receipt of a report of a conflict, the Code Administrator will take prompt steps to determine whether a conflict of interest exists. If the Code Administrator determines that an actual conflict of interest exists, the Code Administrator will take steps to resolve the conflict. If the Code Administrator determines that the appearance of a conflict exists, the Code Administrator will take appropriate steps to remedy such appearance. If the Code Administrator determines that no conflict or appearance of a conflict exists, the Code Administrator shall meet with the Covered Officer to advise him or her of such finding and of his or her reason for taking no action. In lieu of determining whether a conflict or appearance of conflict exists, the Code Administrator may in his or her discretion refer the matter to the Fund’s Board of Trustees/Directors.

3. Waivers

Any Covered Officer requesting a waiver of any of the provisions of this Code must submit a written request for such waiver to the Code Administrator, setting forth the basis of such request and all necessary facts upon which such request can be evaluated. The Code Administrator shall review such request and make a written determination thereon, which shall be binding. The Code Administrator may in reviewing such request, consult at his discretion with legal counsel to OFI Global or to the Fund.

In determining whether to waive any of the provisions of this Code, the Code Administrator shall consider whether the proposed waiver:

(i) is prohibited by this Code;

(ii) is consistent with honest and ethical conduct; and

(iii) will result in a conflict of interest between the Covered Officer’s personal and professional obligations to a Fund.

In lieu of determining whether to grant a waiver, the Code Administrator in his or her discretion may refer the matter to the appropriate Fund’s Board of Trustees/Directors.

4. Reporting Requirements

(a)       Each Covered Officer shall, upon becoming subject to this Code, be provided with a copy of this Code and shall affirm in writing that he or she has received, read, understands and shall adhere to this Code.

(b)       At least annually, all Covered Officers shall be provided with a copy of this Code and shall certify that they have read and understand this Code and recognize that they are subject thereto.

(c)       At least annually, all Covered Officers shall certify that they have complied with the requirements of this Code and that they have disclosed or reported any violations of this Code to the Code Administrator or the Chief Executive Officer of the Fund or its investment adviser.

(d)       The Code Administrator shall submit a quarterly report to the Board of Trustees/Directors of each Fund containing (i) a description of any report of a conflict of interest or apparent conflict and the disposition thereof; (ii) a description of any request for a waiver from this Code and the disposition thereof; (iii) any violation of the Code that has been reported or found and the sanction imposed; and (iv) any other significant information arising under the Code including any proposed amendments.

(e)       Each Covered Officer shall notify the Code Administrator promptly if he or she knows of or has a reasonable belief that any violation of this Code has occurred or is likely to occur. Failure to do so is itself a violation of this Code.

(f)       Any changes to or waivers of this Code, including “implicit” waivers as defined in applicable SEC rules, will, to the extent required, be disclosed by the Code Administrator or his or her designee as provided by applicable SEC rules.²

5. Annual Review

At least annually, the Board of Trustees/Directors of each Fund shall review the Code and consider whether any amendments are necessary or desirable.

6. Sanctions

Any violation of this Code of Ethics shall be subject to the imposition of such sanctions by OFI as may be deemed appropriate under the circumstances to achieve the purposes of this Code and may include, without limitation, a letter of censure, suspension from employment or termination of employment, in the sole discretion of OFI.

7. Administration and Construction

(a) The administration of this Code of Ethics shall be the responsibility of OFI Global’s General Counsel or his or her designee as the “Code Administrator” of this Code, acting under the terms of this Code and the oversight of the Trustees/Directors of the Funds.

(b) The duties of such Code Administrator will include:

² An “implicit waiver” is the failure to take action within a reasonable period of time regarding a material departure from a provision of this Code that has been made known to the General Counsel, the Code Administrator, and an executive officer of the Fund or OFI.

(i) Continuous maintenance of a current list of the names of all Covered Officers;

(ii) Furnishing all Covered Officers a copy of this Code and initially and periodically informing them of their duties and obligations thereunder;

(iii) Maintaining or supervising the maintenance of all records required by this Code, including records of waivers granted hereunder;

(iv) Issuing interpretations of this Code which appear to the Code Administrator to be consistent with the objectives of this Code and any applicable laws or regulations; and

(v) Conducting reviews as shall reasonably be required to detect and report any violations of this Code, with his or her recommendations, to the Chief Executive Officer of OFI Global and to the Trustees/Directors of the affected Fund(s) or any committee appointed by them to deal with such information; and Periodically conducting educational training programs as needed to explain and reinforce the terms of this Code.

(c) In carrying out the duties and responsibilities described under this Code, the Code Administrator may consult with legal counsel, who may include legal counsel to the applicable Funds, and such other persons as the Administrator shall deem necessary or desirable. The Code Administrator shall be protected from any liability hereunder or under any applicable law, rule or regulation, for decisions made in good faith based upon his or her reasonable judgment.

8. Required Records

The Administrator shall maintain and cause to be maintained in an easily accessible place, the following records for the period required by applicable SEC rules (currently six years following the end of the fiscal year of OFI in which the applicable event or report occurred):

(a) A copy of any Code which has been in effect during the period;

(b) A record of any violation of any such Code and of any action taken as a result of such violation, during the period;

(c) A copy of each annual report pursuant to the Code made by a Covered Officer during the period;

(d) A copy of each report made by the Code Administrator pursuant to this Code during the period;

(e) A list of all Covered Officers who are or have been required to make reports pursuant to this Code during the period, plus those person(s) who are or were responsible for reviewing these reports;

(f) A record of any request to waive any requirement of this Code, the decision thereon and the reasons supporting the decision; and

(g) A record of any report of any conflict of interest or appearance of a conflict of interest received by the Code Administrator or discovered by the Code Administrator during the period, the decision thereon and the reasons supporting the decision.

9. Amendments and Modifications

Other than non-substantive or administrative changes, this Code may not be amended or modified unless approved or ratified by the Board of Trustees/Directors of each Fund.

10. Confidentiality.

This Code is identified for the internal use of the Funds and OFI. Reports and records prepared or maintained under this Code are considered confidential and shall be maintained and protected accordingly to the extent permitted by applicable laws, rules and regulations. Except as otherwise required by law or this Code, such matters shall not be disclosed to anyone other than the Trustees/Directors of the affected Fund(s) and their counsel, the independent auditors of the affected Funds and/or OFI, and to OFI, except as such disclosure may be required pursuant to applicable judicial or regulatory process.

Approved by the Denver Board of the Oppenheimer Funds on August 24, 2014

Approved by the New York of the Oppenheimer Funds on September 15, 2014

Approved by OFI Legal and Compliance on May 27, 2014

Exhibit A

Positions Covered by this Code of Ethics for Principal Executive and Financial Officers*

Each Oppenheimer fund

President (Principal Executive Officer)

Treasurer (Principal Financial Officer)

OppenheimerFunds, Inc., OFI Global Asset Management, Inc., and OFI SteelPath, Inc.

President (Principal Executive Officer)

Chief Executive Officer (Principal Executive Officer)

Chief Financial Officer Principal Financial Officer)

Treasurer (Principal Financial Officer)

* There are no other positions with the Funds, OFI, OFI Global or OFI SteelPath, Inc. held by persons who perform similar functions to those listed above.

EX-99.CERT

Exhibit 99.CERT

Section 302 Certifications

CERTIFICATIONS

I, Arthur P. Steinmetz, certify that:

1. I have reviewed this report on Form N-CSR of Oppenheimer Discovery Fund;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed to the registrant’s auditors and the audit committee of the registrant’s board of Trustees (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:     11/17/2015

/s/ Arthur P. Steinmetz

Arthur P. Steinmetz

Principal Executive Officer

Exhibit 99.CERT

Section 302 Certifications

CERTIFICATIONS

I, Brian W. Wixted, certify that:

1. I have reviewed this report on Form N-CSR of Oppenheimer Discovery Fund;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed to the registrant’s auditors and the audit committee of the registrant’s board of Trustees (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:     11/17/2015

/s/ Brian W. Wixted

Brian W. Wixted

Principal Financial Officer

EX-99.906CERT

EX-99.906CERT

Section 906 Certifications

CERTIFICATION PURSUANT TO 18 U.S.C SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Arthur P. Steinmetz, Principal Executive Officer, and Brian W. Wixted, Principal Financial Officer, of Oppenheimer Discovery Fund (the “Registrant”), each certify to the best of his knowledge that:

1. The Registrant’s periodic report on Form N-CSR for the period ended 9/30/2015 (the “Form N-CSR”) fully complies with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Registrant. This certification is being furnished to the Commission solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the Form N-CSR filed with the Commission.

Principal Executive Officer	Principal Financial Officer
Oppenheimer Discovery Fund	Oppenheimer Discovery Fund
/s/ Arthur P. Steinmetz	/s/ Brian W. Wixted
Arthur P. Steinmetz	Brian W. Wixted
Date: 11/17/2015	Date: 11/17/2015