Pioneer Fund

Schedule of Investments | September 30, 2021

Ticker Symbols:

Class A PIODX

Class C PCODX

Class K PIOKX

Class R PIORX

Class Y PYODX

 Schedule of Investments | 9/30/21 (unaudited) 

Shares				Value
			UNAFFILIATED ISSUERS - 96.7%
			COMMON STOCKS - 96.7% of Net Assets
			Air Freight & Logistics - 3.0%
	1,260,250		United Parcel Service, Inc., Class B	$	229,491,525
			Total Air Freight & Logistics	$	229,491,525
			Banks - 9.1%
	3,693,355		Citizens Financial Group, Inc.	$	173,513,818
	2,945,413		Truist Financial Corp.		172,748,472
	7,426,039		Wells Fargo & Co.		344,642,470
			Total Banks	$	690,904,760
			Beverage - 3.0%
	4,278,370		Coca-Cola Co.	$	224,486,074
			Total Beverage	$	224,486,074
			Biotechnology - 2.2%
	269,975	(a)	Biogen, Inc.	$	76,400,225
	154,411	(a)	Regeneron Pharmaceuticals, Inc.		93,446,449
			Total Biotechnology	$	169,846,674
			Building Product - 1.4%
	2,095,650		Carrier Global Corp.	$	108,470,844
			Total Building Product	$	108,470,844
			Capital Market - 1.3%
	493,828		CME Group, Inc.	$	95,496,459
			Total Capital Market	$	95,496,459
			Chemical - 2.4%
	1,340,641		International Flavors & Fragrances, Inc.	$	179,270,515
			Total Chemical	$	179,270,515
			Construction Material - 2.2%
	493,192		Martin Marietta Materials, Inc.	$	168,513,843
			Total Construction Material	$	168,513,843
			Consumer Discretionary - 0.9%
	488,905		NIKE, Inc., Class B	$	71,003,673
			Total Consumer Discretionary	$	71,003,673
			Electrical Equipment - 0.5%
	269,543		Eaton Corp. Plc	$	40,245,465
			Total Electrical Equipment	$	40,245,465
			Energy Equipment & Service - 3.0%
	7,708,844		Schlumberger, Ltd.	$	228,490,136
			Total Energy Equipment & Service	$	228,490,136
			Entertainment - 5.1%
	1,431,470		Electronic Arts, Inc.	$	203,626,607
	1,978,237	(a)	Live Nation Entertainment, Inc.		180,276,738
			Total Entertainment	$	383,903,345
			Food & Staple Retailing - 2.1%
	348,706		Costco Wholesale Corp.	$	156,691,041
			Total Food & Staple Retailing	$	156,691,041
			Health Care - 2.4%
	319,011		Thermo Fisher Scientific, Inc.	$	182,260,555
			Total Health Care	$	182,260,555
			Health Care Equipment & Supplies - 2.2%
	404,365		Danaher Corp.	$	123,104,880
	347,051		Medtronic Plc		43,502,843
			Total Health Care Equipment & Supplies	$	166,607,723
			Health Care Provider & Service - 1.0%
	184,029		UnitedHealth Group, Inc.	$	71,907,491
			Total Health Care Provider & Service	$	71,907,491
			Hotels, Restaurants & Leisure - 2.6%
	1,875,852	(a)	Planet Fitness, Inc.	$	147,348,175
	615,565	(a)	Shake Shack, Inc.		48,297,230
			Total Hotels, Restaurants & Leisure	$	195,645,405
			Interactive Media & Service - 6.6%
	186,743	(a)	Alphabet, Inc.	$	499,261,145
			Total Interactive Media & Service	$	499,261,145
			Internet & Direct Marketing Retail - 4.1%
	76,731	(a)	Amazon.com, Inc.	$	252,064,404
	23,242	(a)	Booking Holdings, Inc.		55,173,487
			Total Internet & Direct Marketing Retail	$	307,237,891
			IT Services - 7.9%
	1,207,097	(a)	Akamai Technologies, Inc.	$	126,250,275
	1,026,518	(a)	PayPal Holdings, Inc.		267,110,249
	934,652		Visa, Inc.		208,193,733
			Total IT Services	$	601,554,257
			Life Science Tool & Service - 1.0%
	471,164		Agilent Technologies, Inc.	$	74,222,465
			Total Life Science Tool & Service	$	74,222,465

 Schedule of Investments | 9/30/21 (unaudited)(continued) 

Shares				Value
			Machinery - 1.0%
	383,269		Caterpillar, Inc.	$	73,576,150
			Total Machinery	$	73,576,150
			Oil, Gas & Consumable Fuel - 0.8%
	790,164		EOG Resources, Inc.	$	63,426,464
			Total Oil, Gas & Consumable Fuel	$	63,426,464
			Personal Product - 0.8%
	211,071		Estee Lauder Cos, Inc.	$	63,306,525
			Total Personal Product	$	63,306,525
			Pharmaceutical - 3.6%
	8,645,622	(a)	Elanco Animal Health, Inc.	$	275,708,886
			Total Pharmaceutical	$	275,708,886
			Road & Rail - 3.0%
	1,161,759		Union Pacific Corp.	$	227,716,382
			Total Road & Rail	$	227,716,382
			Semiconductors & Semiconductor Equipment - 7.9%
	1,772,522		Analog Devices, Inc.	$	296,861,985
	268,909		Lam Research Corp.		153,049,557
	735,213		NVIDIA Corp.		152,306,725
			Total Semiconductors & Semiconductor Equipment	$	602,218,267
			Software - 7.7%
	1,610,950		Microsoft Corp.	$	454,159,024
	41,675	(a)	MicroStrategy, Inc.		24,104,820
	386,751	(a)	salesforce.com, Inc.		104,894,606
			Total Software	$	583,158,450
			Specialty Retail - 3.0%
	396,041		Home Depot, Inc.	$	130,004,419
	279,967	(a)	Ulta Beauty, Inc.		101,045,689
			Total Specialty Retail	$	231,050,108
			Technology Hardware, Storage & Peripheral - 4.9%
	2,642,376		Apple, Inc.	$	373,896,204
			Total Technology Hardware, Storage & Peripheral	$	373,896,204
			TOTAL COMMON STOCKS
			(Cost $5,097,482,569)	$	7,339,568,722
			TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS - 96.7%
			(Cost $5,097,482,569)	$	7,339,568,722
			OTHER ASSETS AND LIABILITIES - 3.3%	$	252,873,775
			NET ASSETS - 100.0%	$	7,592,442,497

(a) Non-income producing security.

Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels below.
Level 1 - unadjusted 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 risks, etc.).
Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments).
The following is a summary of the inputs used as of September 30, 2021, in valuing the Fund's investments:
	Level 1	Level 2	Level 3	Total
Common Stocks	$ 7,339,568,722	$ –	$ –	$ 7,339,568,722
Total Investments in Securities	$ 7,339,568,722	$ –	$ –	$ 7,339,568,722

During the nine months ended September 30, 2021, there were no transfers in or out of Level 3.

Pioneer Fund | 9/30/21