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

                                   FORM N-Q

                   QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS
    OF REGISTERED MANAGEMENT INVESTMENT COMPANY



  Investment Company Act file number 811-01466


                            Pioneer Fund
               (Exact name of registrant as specified in charter)


                       60 State Street, Boston, MA 02109
              (Address of principal executive offices) (ZIP code)


            Terrence J. Cullen, Pioneer Investment Management, Inc.,
                       60 State Street, Boston, MA 02109
                    (Name and address of agent for service)


Registrant's telephone number, including area code:  (617) 742-7825


Date of fiscal year end:  December 31

Date of reporting period:  September 30, 2013

Form N-Q is to be used by management investment companies, other than small
business investment companies registered on Form N-5 (239.24 and 274.5 of this
chapter), to file reports with the Commission, not later than 60 days after
close of the first and third fiscal quarters, pursuant to Rule 30b1-5 under
the Investment Company Act of 1940 (17 CFR 270.30b1-5).  The Commission may
use the information provided on Form N-Q in its regulatory, disclosure review,
inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q,
and the Commission will make this information public. A registrant is not
required to respond to the collection of information contained in Form N-Q
unless the Form displays a currently valid Office of Management and Budget
("OMB") control number. Please direct comments concerning the accuracy of the
information collection burden estimate and any suggestions for reducing the
burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW,
Washington, DC 20549-0609.  The OMB has reviewed this collection of information
under the clearance requirements of 44 U.S.C. ss. 3507.


<PAGE>
ITEM 1. Schedule of Investments.

		Pioneer Fund
		Schedule of Investments 9/30/2013
	Shares			Value
		COMMON STOCKS - 100.1%
		Energy - 9.3%
		Oil & Gas Drilling - 0.8%
	607,174	Ensco Plc	$	32,635,602
	146,615	Helmerich & Payne, Inc.		10,109,104
			$	42,744,706
		Oil & Gas Equipment & Services - 2.1%
	175,077	Cameron International Corp. *	$	10,219,244
	172,721	FMC Technologies, Inc. *		9,572,198
	317,028	Halliburton Co.		15,264,898
	326,122	National Oilwell Varco, Inc.		25,473,389
	484,324	Schlumberger, Ltd.		42,794,869
			$	103,324,598
		Integrated Oil & Gas - 1.4%
	464,041	Chevron Corp.	$	56,380,982
	134,276	Occidental Petroleum Corp.		12,560,177
			$	68,941,159
		Oil & Gas Exploration & Production - 3.9%
	491,844	Apache Corp.	$	41,875,598
	1,181,814	Cabot Oil & Gas Corp.		44,105,298
	518,332	ConocoPhillips		36,029,257
	1,106,762	Marathon Oil Corp.		38,603,859
	861,689	Southwestern Energy Co. *		31,348,246
			$	191,962,258
		Oil & Gas Refining & Marketing - 1.1%
	416,557	Marathon Petroleum Corp.	$	26,792,946
	449,296	Phillips 66		25,978,295
			$	52,771,241
		Total Energy	$	459,743,962
		Materials - 2.9%
		Fertilizers & Agricultural Chemicals - 0.7%
	195,182	Monsanto Co.	$	20,371,145
	338,278	The Mosaic Co.		14,552,720
			$	34,923,865
		Industrial Gases - 0.9%
	410,486	Airgas, Inc.	$	43,532,040
		Specialty Chemicals - 1.1%
	562,216	Ecolab, Inc.	$	55,524,452
		Paper Products - 0.2%
	230,884	International Paper Co.	$	10,343,603
		Total Materials	$	144,323,960
		Capital Goods - 9.0%
		Aerospace & Defense - 2.1%
	208,914	Raytheon Co.	$	16,101,002
	836,908	United Technologies Corp.		90,235,421
			$	106,336,423
		Electrical Components & Equipment - 0.4%
	168,855	Rockwell Automation, Inc.	$	18,057,354
		Industrial Conglomerates - 2.9%
	682,809	3M Co.	$	81,534,223
	2,578,983	General Electric Co.		61,611,904
			$	143,146,127
		Construction & Farm Machinery & Heavy Trucks - 1.8%
	332,202	Cummins, Inc.	$	44,139,680
	794,943	PACCAR, Inc.		44,246,527
			$	88,386,207
		Industrial Machinery - 1.8%
	873,614	Ingersoll-Rand Plc	$	56,732,493
	393,111	SPX Corp.		33,272,915
			$	90,005,408
		Total Capital Goods	$	445,931,519
		Transportation - 2.3%
		Air Freight & Logistics - 0.5%
	266,587	United Parcel Service, Inc. (Class B)	$	24,358,054
		Railroads - 1.8%
	554,086	Norfolk Southern Corp.	$	42,858,552
	291,008	Union Pacific Corp.		45,205,183
			$	88,063,735
		Total Transportation	$	112,421,789
		Automobiles & Components - 2.6%
		Auto Parts & Equipment - 1.3%
	258,703	BorgWarner, Inc.	$	26,229,897
	840,054	Johnson Controls, Inc.		34,862,241
			$	61,092,138
		Automobile Manufacturers - 1.3%
	3,878,999	Ford Motor Co.	$	65,438,713
		Total Automobiles & Components	$	126,530,851
		Consumer Durables & Apparel - 0.5%
		Apparel, Accessories & Luxury Goods - 0.5%
	421,904	Coach, Inc.	$	23,006,425
		Total Consumer Durables & Apparel	$	23,006,425
		Consumer Services - 1.6%
		Restaurants - 1.6%
	426,656	McDonald's Corp.	$	41,048,574
	497,078	Starbucks Corp.		38,260,094
			$	79,308,668
		Total Consumer Services	$	79,308,668
		Media - 4.8%
		Cable & Satellite - 0.3%
	361,922	Comcast Corp.	$	16,340,778
		Movies & Entertainment - 1.8%
	1,109,402	The Walt Disney Co.	$	71,545,335
	280,612	Time Warner, Inc.		18,467,076
			$	90,012,411
		Publishing - 2.7%
	2,770,350	John Wiley & Sons, Inc.	$	132,117,992
		Total Media	$	238,471,181
		Retailing - 4.4%
		Department Stores - 1.1%
	775,434	Macy's, Inc.	$	33,553,029
	320,475	Nordstrom, Inc.		18,010,695
			$	51,563,724
		General Merchandise Stores - 0.8%
	627,785	Target Corp.	$	40,165,684
		Apparel Retail - 1.8%
	552,690	Ross Stores, Inc.	$	40,235,832
	875,380	TJX Companies, Inc.		49,362,678
			$	89,598,510
		Home Improvement Retail - 0.7%
	334,680	Lowe's Companies, Inc.	$	15,934,115
	261,192	The Home Depot, Inc.		19,811,413
			$	35,745,528
		Total Retailing	$	217,073,446
		Food & Staples Retailing - 2.9%
		Drug Retail - 2.5%
	726,983	CVS Caremark Corp.	$	41,256,285
	1,560,551	Walgreen Co.		83,957,644
			$	125,213,929
		Hypermarkets & Super Centers - 0.4%
	230,100	Wal-Mart Stores, Inc.	$	17,018,196
		Total Food & Staples Retailing	$	142,232,125
		Food, Beverage & Tobacco - 5.8%
		Soft Drinks - 1.0%
	348,385	Coca-Cola Enterprises, Inc.	$	14,008,561
	397,721	Dr. Pepper Snapple Group, Inc.		17,825,855
	227,550	PepsiCo, Inc.		18,090,225
			$	49,924,641
		Packaged Foods & Meats - 4.8%
	522,101	Campbell Soup Co.	$	21,254,732
	651,922	General Mills, Inc.		31,240,102
	400,759	Kraft Foods Group, Inc.		21,015,802
	1,202,380	Mondelez International, Inc.		37,778,780
	1,367,563	The Hershey Co.		126,499,578
			$	237,788,994
		Total Food, Beverage & Tobacco	$	287,713,635
		Household & Personal Products - 2.8%
		Household Products - 2.8%
	1,652,803	Colgate-Palmolive Co.	$	98,011,218
	231,522	The Clorox Co.		18,919,978
	304,446	The Procter & Gamble Co.		23,013,073
			$	139,944,269
		Total Household & Personal Products	$	139,944,269
		Health Care Equipment & Services - 6.4%
		Health Care Equipment - 5.2%
	1,151,429	Abbott Laboratories	$	38,215,929
	365,986	Baxter International, Inc.		24,041,620
	487,872	Becton Dickinson and Co.		48,796,957
	678,804	Covidien Plc		41,366,316
	687,494	CR Bard, Inc.		79,199,309
	1,868,853	Smith & Nephew Plc		23,322,175
			$	254,942,306
		Health Care Services - 0.6%
	341,326	DaVita HealthCare Partners, Inc. *	$	19,421,449
	184,973	Express Scripts Holding Co. *		11,427,632
			$	30,849,081
		Managed Health Care - 0.6%
	464,809	Aetna, Inc.	$	29,757,072
		Total Health Care Equipment & Services	$	315,548,459
		Pharmaceuticals, Biotechnology & Life Sciences - 8.8%
		Biotechnology - 2.5%
	478,315	Amgen, Inc.	$	53,542,581
	258,594	Celgene Corp. *		39,805,374
	434,306	Gilead Sciences, Inc. *		27,291,789
			$	120,639,744
		Pharmaceuticals - 5.8%
	1,151,429	AbbVie, Inc.	$	51,503,419
	373,518	Eli Lilly & Co.		18,799,161
	1,029,662	Johnson & Johnson		89,261,399
	84,875	Mallinckrodt Plc *		3,742,139
	563,016	Merck & Co., Inc.		26,805,192
	2,092,510	Pfizer, Inc.		60,075,962
	1,194,462	Zoetis, Inc.		37,171,657
			$	287,358,929
		Life Sciences Tools & Services - 0.5%
	279,533	Thermo Fisher Scientific, Inc.	$	25,758,966
		Total Pharmaceuticals, Biotechnology & Life Sciences	$	433,757,639
		Banks - 6.7%
		Diversified Banks - 3.8%
	250,009	Canadian Imperial Bank of Commerce	$	19,911,427
	1,680,584	US Bancorp/MN		61,475,763
	2,630,719	Wells Fargo & Co.		108,701,309
			$	190,088,499
		Regional Banks - 2.9%
	1,000,000	BB&T Corp.	$	33,750,000
	1,952,036	KeyCorp		22,253,210
	1,200,600	The PNC Financial Services Group, Inc.		86,983,470
			$	142,986,680
		Total Banks	$	333,075,179
		Diversified Financials - 6.6%
		Other Diversified Financial Services - 2.7%
	2,163,774	Bank of America Corp.	$	29,860,081
	1,296,269	Citigroup, Inc.		62,882,009
	826,262	JPMorgan Chase & Co.		42,709,483
			$	135,451,573
		Consumer Finance - 1.4%
	421,317	American Express Co.	$	31,817,860
	704,308	Discover Financial Services, Inc.		35,595,726
			$	67,413,586
		Asset Management & Custody Banks - 2.1%
	707,045	Franklin Resources, Inc.	$	35,741,125
	730,325	Invesco, Ltd.		23,297,368
	615,462	T. Rowe Price Group, Inc.		44,270,182
			$	103,308,675
		Investment Banking & Brokerage - 0.4%
	119,954	The Goldman Sachs Group, Inc.	$	18,977,922
		Total Diversified Financials	$	325,151,756
		Insurance - 3.3%
		Life & Health Insurance - 0.8%
	645,378	Aflac, Inc.	$	40,006,982
		Property & Casualty Insurance - 2.5%
	975,148	The Chubb Corp.	$	87,041,710
	458,039	The Travelers Companies, Inc.		38,827,966
			$	125,869,676
		Total Insurance	$	165,876,658
		Software & Services - 11.3%
		Internet Software & Services - 2.5%
	499,557	eBay, Inc. *	$	27,870,285
	718,905	Facebook, Inc. *		36,117,787
	50,316	Google, Inc. *		44,072,288
	497,500	Yahoo!, Inc. *		16,497,100
			$	124,557,460
		IT Consulting & Other Services - 1.0%
	280,196	International Business Machines Corp.	$	51,886,695
		Data Processing & Outsourced Services - 3.3%
	804,447	Automatic Data Processing, Inc.	$	58,225,874
	345,615	DST Systems, Inc.		26,062,827
	317,732	Fiserv, Inc. *		32,106,819
	35,898	Mastercard, Inc.		24,151,456
	126,919	Visa, Inc.		24,254,221
			$	164,801,197
		Application Software - 1.0%
	792,123	Adobe Systems, Inc. *	$	41,142,869
	356,921	Nuance Communications, Inc. *		6,672,638
			$	47,815,507
		Systems Software - 3.5%
	2,952,257	Microsoft Corp.	$	98,339,681
	1,240,151	Oracle Corp.		41,135,809
	1,297,434	Symantec Corp.		32,111,492
			$	171,586,982
		Total Software & Services	$	560,647,841
		Technology Hardware & Equipment - 3.7%
		Communications Equipment - 1.3%
	1,567,231	Cisco Systems, Inc.	$	36,704,550
	128,096	F5 Networks, Inc. *		10,985,513
	290,244	Motorola Solutions, Inc.		17,234,689
			$	64,924,752
		Computer Hardware - 2.0%
	208,925	Apple, Inc.	$	99,604,994
		Computer Storage & Peripherals - 0.4%
	744,741	EMC Corp.	$	19,035,580
		Total Technology Hardware & Equipment	$	183,565,326
		Semiconductors & Semiconductor Equipment - 3.3%
		Semiconductor Equipment - 0.5%
	268,298	ASML Holding NV (A.D.R.)	$	26,497,110
		Semiconductors - 2.8%
	1,297,646	Analog Devices, Inc.	$	61,054,244
	801,865	Intel Corp.		18,378,746
	467,479	Maxim Integrated Products, Inc.		13,930,874
	905,590	Xilinx, Inc.		42,435,947
			$	135,799,811
		Total Semiconductors & Semiconductor Equipment	$	162,296,921
		Telecommunication Services - 0.7%
		Integrated Telecommunication Services - 0.7%
	783,371	Verizon Communications, Inc.	$	36,552,091
		Total Telecommunication Services	$	36,552,091
		Utilities - 0.4%
		Electric Utilities - 0.4%
	464,809	American Electric Power Co., Inc.	$	20,149,470
		Total Utilities	$	20,149,470
		TOTAL COMMON STOCKS
		(Cost $2,852,062,430)	$	4,953,323,170
		TOTAL INVESTMENT IN SECURITIES - 100.1%
		(Cost $2,852,062,430) (a)	$	4,953,323,170
		OTHER ASSETS & LIABILITIES - (0.1)%	$	(4,735,978)
		TOTAL NET ASSETS - 100.0%	$	4,948,587,192
	*	Non-income producing security.
	+	Investment held by the Fund representing 5% or more of the outstanding voting stock of such company.  See Notes to Financial Statements - Note 6.
	(A.D.R.)	American Depositary Receipts.
	(a)	At September 30, 2013, the net unrealized gain on investments based on
		cost for federal income tax purposes of $2,856,795,161 was as follows:
		Aggregate gross unrealized gain for all investments in which
		there is an excess of value over tax cost	$	2,146,739,049
		Aggregate gross unrealized loss for all investments in which
		there is an excess of tax cost over value		(50,211,040)
		Net unrealized gain	$	2,096,528,009
Various inputs are used in determining the value of the Fund’s investments.  These inputs are summarized in the three broad levels listed below.
Level 1 – quoted prices in active markets for identical securities
Level 2 – other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements - Note 1A.
Level 3 – significant unobservable inputs (including the Fund’s own assumptions in determining fair value of investments) See Notes to Financial Statements - Note 1A.
Generally, equity securities are categorized as Level 1, fixed income securities and senior loans as Level 2 and securities valued
using fair value methods (other than prices supplied by independent pricing services) as Level 3.  See Notes to Financial Statements - Note 1A.
The following is a summary of the inputs used as of September 30, 2013, in valuing the Fund’s investments:

	Level 1		Level 2		Level 3		Total
Common Stocks	$	4,953,323,170	$	-	$	-	$	4,953,323,170
Total	$	4,953,323,170	$	-	$	-	$	4,953,323,170
During the six months ended September 30, 2013, there were no transfers between Levels 1, 2 and 3.

ITEM 2. CONTROLS AND PROCEDURES.

(a) Disclose the conclusions of the registrant's principal executive
and principal financial officers, or persons performing similar functions,
regarding the effectiveness of the registrant's disclosure
controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR
270.30a-3(c))) as of a date within 90 days of the filing date of the report
that includes the disclosure required by this paragraph, based on the
evaluation of these controls and procedures required by Rule 30a-3(b)
under the Act (17 CFR 270.30a-3(b))) and Rule 13a-15(b) or 15d-15(b)
under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)).

The registrant's principal executive officer and principal financial officer
have concluded that the registrant's disclosure controls and procedures are
effective based on their evaluation of these controls and procedures as of
a date within 90 days of the filing date of this report.

(b) Disclose any change in the registrant's internal controls over financial
reporting (as defined in Rule 30a-3(d) under the Act (17 CFR 270.30a-3(d))
that occurred during the registrant's last fiscal quarter that has materially
affected, or is reasonably likely to materially affect, the registrant's
internal control over financial reporting.

There were no significant changes in the registrant's internal control over
financial reporting that occurred during the 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 3. EXHIBITS.

(a) A separate certification for each principal executive officer and principal
financial officer of the registrant as required by Rule 30a-2(a) under the Act
(17 CFR 270.30a-2(a)).

Filed herewith.



<PAGE>


                                   SIGNATURES

                          [See General Instruction F]


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.


(Registrant) Pioneer Fund

By (Signature and Title)* /s/ John F. Cogan, Jr.
John F. Cogan, Jr, President

Date November 29, 2013


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 (Signature and Title)* /s/ John F. Cogan, Jr.
John F. Cogan, Jr., President

Date November 29, 2013



By (Signature and Title)* /s/ Mark Bradley
Mark Bradley, Treasurer

Date November 29, 2013

* Print the name and title of each signing officer under his or her signature.