Schedule of Investments
PRIMECAP Odyssey Aggressive Growth Fund
January 31, 2023 (Unaudited)
Shares			Value
		COMMON STOCKS - 95.5%
		Communication Services - 5.9%
	722,850	Alphabet, Inc. - Class A (a)	$	71,446,494
	632,390	Alphabet, Inc. - Class C (a)		63,156,789
	937,120	Baidu, Inc. - ADR (a)		126,211,322
	1,123,725	comScore, Inc. (a)		1,370,945
	81,500	Electronic Arts, Inc.		10,487,420
	725,499	IMAX Corp. (a)		12,333,483
	74,470	Live Nation Entertainment, Inc. (a)		5,994,090
	584,128	Madison Square Garden Entertainment Corp. - Class A (a)		30,544,053
	2,850	Madison Square Garden Sports Corp. - Class A		518,244
	80,700	Meta Platforms, Inc. - Class A (a)		12,021,879
	10,400	Netflix, Inc. (a)		3,680,144
	1,615,400	Pinterest, Inc. - Class A (a)		42,468,866
	25,900	Roblox Corp. - Class A (a)		963,739
	105,300	Snap, Inc. - Class A (a)		1,217,268
	203,300	T-Mobile US, Inc. (a)		30,354,723
	6,033,430	WildBrain Ltd. - CAD (a)		12,923,434
	91,669	ZoomInfo Technologies, Inc. (a)		2,587,816
				428,280,709
		Consumer Discretionary - 12.2%
	1,121,000	Alibaba Group Holding Ltd. - ADR (a)		123,534,200
	147,050	Amazon.com, Inc. (a)		15,165,267
	67,100	Boot Barn Holdings, Inc. (a)		5,602,179
	99,180	Burlington Stores, Inc. (a)		22,794,539
	157,937	Capri Holdings Ltd. (a)		10,501,231
	766,300	CarMax, Inc. (a)		53,985,835
	13,500	Darden Restaurants, Inc.		1,997,595
	700	Deckers Outdoor Corp. (a)		299,236
	850	Dollar General Corp.		198,560
	1,500	Duolingo, Inc. (a)		143,235
	249,370	eBay, Inc.		12,343,815
	3,659,109	Entain PLC - GBP		67,476,446
	3,000	Five Below, Inc. (a)		591,390
	22,700	Flutter Entertainment PLC - GBP (a)		3,522,036
	1,433,485	GAN Ltd. (a)		3,268,346
	99,430	Gildan Activewear, Inc.		3,115,142
	846,100	GrowGeneration Corp. (a)		4,365,876
	799,795	iRobot Corp. (a)		35,990,775
	336,700	Mobileye Global, Inc. - Class A (a)		12,996,620
	1,059,865	Norwegian Cruise Line Holdings Ltd. (a)		16,120,547
	148,000	Ollie’s Bargain Outlet Holdings, Inc. (a)		8,104,480
	61,200	Restaurant Brands International, Inc.		4,096,116
	59,960	Rivian Automotive, Inc. - Class A (a)		1,163,224
	935,476	Royal Caribbean Cruises Ltd. (a)		60,749,811
	2,448,120	Sony Group Corp. - ADR		219,008,815
	822,350	Tesla, Inc. (a)		142,447,467
	26,760	Tuesday Morning Corp. (a)		14,136
	25,000	Ulta Beauty, Inc. (a)		12,849,000
	108,400	Victoria’s Secret & Co. (a)		4,569,060
	3,009,450	XPeng, Inc. - ADR (a)		32,020,548
				879,035,527
		Consumer Staples - 0.0%
	4,000	Bakkafrost P/F - NOK		248,206
	5,554	Calavo Growers, Inc.		178,006
	5,000	Grocery Outlet Holding Corp. (a)		151,950
	18,000	Real Good Food Co., Inc. (The) - Class A (a)		100,080
				678,242
		Energy - 1.4%
	557,850	Coterra Energy, Inc.		13,962,985
	127,200	EOG Resources, Inc.		16,822,200
	203,900	New Fortress Energy, Inc.		7,909,281
	8,862,882	Transocean Ltd. (a)		59,735,825
				98,430,291
		Financials - 5.6%
	192,700	AssetMark Financial Holdings, Inc. (a)		5,114,258
	150,471	CME Group, Inc. - Class A		26,582,207
	294,653	Discover Financial Services		34,394,845
	116,700	Galaxy Digital Holdings Ltd. - CAD (a)		449,065
	37,000	LPL Financial Holdings, Inc.		8,773,440
	528,220	MarketAxess Holdings, Inc.		192,192,847
	734,072	Morgan Stanley		71,447,228
	658,400	NMI Holdings, Inc. - Class A (a)		15,294,632
	114,030	Progressive Corp. (The)		15,547,990
	484,100	Tradeweb Markets, Inc. - Class A		36,084,814
				405,881,326
		Health Care - 32.3%
	284,100	Abbott Laboratories		31,407,255
	194,500	Accuray, Inc. (a)		490,140
	104,230	Adaptive Biotechnologies Corp. (a)		966,212
	1,175,700	Alkermes PLC (a)		33,672,048
	1,991,770	Allogene Therapeutics, Inc. (a)		15,376,464
	1,153,400	Amicus Therapeutics, Inc. (a)		15,040,336
	351,500	Arbutus Biopharma Corp. (a)		1,058,015
	709,147	BeiGene Ltd. - ADR (a)		181,541,632
	6,145	Berkeley Lights, Inc. (a)		13,212
	851,389	Biogen, Inc. (a)		247,669,060
	1,917,310	BioMarin Pharmaceutical, Inc. (a)		221,161,709
	1,376,522	BioNTech SE - ADR		197,407,020
	420,000	Boston Scientific Corp. (a)		19,425,000
	363,700	Bridgebio Pharma, Inc. (a)		3,375,136
	126,712	Calithera Biosciences, Inc. (a)		51,952
	8,849,600	Cerus Corp. (a)		27,787,744
	14,000	Charles River Laboratories International, Inc. (a)		3,405,500
	642,092	Elanco Animal Health, Inc. (a)		8,815,923
	709,194	Eli Lilly & Co.		244,069,115
	437,600	Exact Sciences Corp. (a)		29,546,752
	4,246,541	FibroGen, Inc. (a)		100,218,368
	467,200	Glaukos Corp. (a)		22,916,160
	83,269	Guardant Health, Inc. (a)		2,617,145
	476,596	Health Catalyst, Inc. (a)		6,624,684
	11,440	Illumina, Inc. (a)		2,450,448
	196,400	ImmunoGen, Inc. (a)		903,440
	383,306	Insulet Corp. (a)		110,131,480
	1,008,000	LivaNova PLC (a)		56,649,600
	206,730	Mereo Biopharma Group PLC - ADR (a)		193,313
	9,916,620	Nektar Therapeutics (a) (b)		26,973,206
	64,900	NuVasive, Inc. (a)		2,959,440
	617,020	OraSure Technologies, Inc. (a)		3,442,972
	19,220	Penumbra, Inc. (a)		4,812,880
	380,525	PolyPeptide Group AG - CHF (a)		11,055,580
	3,718,491	Pulmonx Corp. (a) (b)		33,057,385
	195,030	QIAGEN N.V. - EUR (a)		9,514,133
	20,886	Repligen Corp. (a)		3,870,176
	4,938,057	Rhythm Pharmaceuticals, Inc. (a) (b)		135,055,859
	118,800	Roche Holding AG - CHF		37,085,844
	62,500	Sage Therapeutics, Inc. (a)		2,771,250
	1,510,593	Seagen, Inc. (a)		210,697,512
	225,080	Shockwave Medical, Inc. (a)		42,299,284
	11,800	Sio Gene Therapies, Inc. (a)		5,263
	3,731,262	Standard BioTools, Inc. (a)		7,462,524
	3,585,770	Wave Life Sciences Ltd. (a)		17,677,846
	5,302,126	Xencor, Inc. (a) (b)		174,545,988
	818,950	Zentalis Pharmaceuticals, Inc. (a)		19,327,220
				2,327,599,225
		Industrials - 12.2%
	2,144,300	AECOM		187,133,061
	428,100	Alaska Air Group, Inc. (a)		21,978,654
	25,100	Allegiant Travel Co. (a)		2,159,353
	4,316,500	American Airlines Group, Inc. (a)		69,668,310
	1,760,300	Array Technologies, Inc. (a)		39,131,469
	3,345,600	Aurora Innovation, Inc. - Class A (a)		6,088,992
	120,000	Axon Enterprise, Inc. (a)		23,452,800
	49,600	Bloom Energy Corp. - Class A (a)		1,236,528
	41,000	Controladora Vuela Compania de Aviacion, S.A.B. de C.V. - ADR (a)		454,280
	208,350	Curtiss-Wright Corp.		34,544,430
	2,286,247	Delta Air Lines, Inc. (a)		89,392,258
	31,400	FedEx Corp.		6,087,204
	70,600	Frontier Group Holdings, Inc. (a)		888,148
	304,400	GFL Environmental, Inc.		9,393,784
	195,300	Gibraltar Industries, Inc. (a)		10,462,221
	158,500	Hawaiian Holdings, Inc. (a)		1,952,720
	438,600	Hertz Global Holdings, Inc. (a)		7,903,572
	909,620	Jacobs Solutions, Inc.		112,383,551
	2,641,900	JetBlue Airways Corp. (a)		21,135,200
	2,007,700	Li-Cycle Holdings Corp. (a)		10,921,888
	257,750	Lyft, Inc. - Class A (a)		4,188,437
	160,200	Masonite International Corp. (a)		14,613,444
	1,240,876	NN, Inc. (a)		2,556,205
	3,700	Old Dominion Freight Line, Inc.		1,232,988
	22,400	RXO, Inc. (a)		410,368
	15,800	Ryanair Holdings PLC - ADR (a)		1,430,374
	1,760,200	Southwest Airlines Co.		62,962,354
	211,200	Spirit Airlines, Inc.		4,190,208
	46,815	Sun Country Airlines Holdings, Inc. (a)		874,036
	33,800	TransDigm Group, Inc.		24,259,950
	20,000	TuSimple Holdings, Inc. - Class A (a)		42,000
	320,300	Uber Technologies, Inc. (a)		9,906,879
	1,980,670	United Airlines Holdings, Inc. (a)		96,973,603
	26,800	WillScot Mobile Mini Holdings Corp. (a)		1,298,728
	30,300	XPO, Inc. (a)		1,207,758
				882,515,755
		Information Technology - 24.9%
	161,700	Adobe, Inc. (a)		59,883,978
	91,400	Ambarella, Inc. (a)		8,211,376
	109,200	Applied Materials, Inc.		12,174,708
	2,756,200	Arlo Technologies, Inc. (a)		10,335,750
	39,200	ASML Holding N.V. - ADR		25,904,928
	31,700	Autodesk, Inc. (a)		6,820,572
	1,164,186	Axcelis Technologies, Inc. (a)		128,002,251
	9,443,066	BlackBerry Ltd. (a)		40,133,030
	70,300	Credo Technology Group Holding Ltd. (a)		1,218,299
	123,499	CrowdStrike Holdings, Inc. - Class A (a)		13,078,544
	59,200	CyberArk Software Ltd. (a)		8,340,096
	85,140	Dell Technologies, Inc. - Class C		3,458,387
	488,041	Descartes Systems Group, Inc. (The) (a)		35,636,754
	200	DocuSign, Inc. (a)		12,128
	13,000	FARO Technologies, Inc. (a)		357,240
	6,872,120	Flex Ltd. (a)		160,464,002
	16,250	Flywire Corp. (a)		438,262
	876,765	FormFactor, Inc. (a)		24,672,167
	108,500	Freshworks, Inc. - Class A (a)		1,755,530
	27,150	GitLab, Inc. - Class A (a)		1,341,481
	740,000	Hewlett Packard Enterprise Co.		11,936,200
	220,870	HP, Inc.		6,436,152
	103,100	HubSpot, Inc. (a)		35,776,731
	2,618,900	indie Semiconductor, Inc. - Class A (a)		20,872,633
	107,050	Intuit, Inc.		45,246,823
	670,000	Jabil, Inc.		52,682,100
	88,800	Jamf Holding Corp. (a)		1,764,456
	40,180	Keysight Technologies, Inc. (a)		7,206,283
	128,904	Keywords Studios PLC - GBP		4,527,544
	308,900	KLA Corp.		121,237,072
	107,500	Marqeta, Inc. - Class A (a)		712,725
	37,900	Marvell Technology, Inc.		1,635,385
	155,000	Materialise NV - ADR (a)		1,633,700
	1,725,580	MaxLinear, Inc. (a)		71,093,896
	3,272,700	Micron Technology, Inc.		197,343,810
	25,050	MongoDB, Inc. (a)		5,365,960
	977,107	NetApp, Inc.		64,713,797
	768,443	nLIGHT, Inc. (a)		9,528,693
	1,964,425	Nutanix, Inc. - Class A (a)		54,748,525
	175,000	NVIDIA Corp.		34,189,750
	84,000	Okta, Inc. - Class A (a)		6,183,240
	190,110	OSI Systems, Inc. (a)		18,005,318
	66,550	Palo Alto Networks, Inc. (a)		10,557,492
	298,400	PROS Holdings, Inc. (a)		7,519,680
	335,293	QUALCOMM, Inc.		44,664,381
	189,700	Rapid7, Inc. (a)		7,563,339
	3,250	RingCentral, Inc. - Class A (a)		126,848
	1,693,570	Splunk, Inc. (a)		162,193,199
	1,275,900	Stratasys Ltd. (a)		18,283,647
	45,800	Tenable Holdings, Inc. (a)		1,842,534
	501,080	Trimble, Inc. (a)		29,092,705
	246,833	Unity Software, Inc. (a)		8,767,508
	810,629	Universal Display Corp.		107,432,661
	124,140	VMware, Inc. - Class A (a)		15,203,426
	347,300	Western Digital Corp. (a)		15,263,835
	77,250	WEX, Inc. (a)		14,288,933
	501,000	Wolfspeed, Inc. (a)		38,582,010
	43,700	Zoom Video Communications, Inc. - Class A (a)		3,277,500
				1,799,739,974
		Materials - 0.9%
	84,900	Albemarle Corp.		23,895,105
	56,219	Bioceres Crop Solutions Corp. (a)		702,737
	34,500	Ingevity Corp. (a)		2,844,180
	2,680,600	Ivanhoe Mines Ltd. - Class A - CAD (a)		25,183,195
	1,290,252	Perimeter Solutions SA (a)		11,999,344
				64,624,561
		Real Estate - 0.1%
	148,280	EPR Properties		6,298,935
	53,600	Safehold, Inc.		1,873,856
				8,172,791
		TOTAL COMMON STOCKS
		(Cost $4,006,865,927)	$	6,894,958,401
		PREFERRED STOCKS - 0.0%
		Financials - 0.0%
	595,000	Freddie Mac Fixed-to-Floating Rate Non-Cumulative Preferred Stock Series Z, Perpetual Maturity 7.875% (a)		1,201,900
		TOTAL PREFERRED STOCKS
		(Cost $3,289,812)		1,201,900
		RIGHTS - 0.0%
		Health Care - 0.0%
	349,922	ABIOMED, Inc. - CVR (Issue Date 12/23/22) (a) (c) (d)		356,920
	10,344,756	Epizyme, Inc. - CVR (Issue Date 8/15/22) (a) (c) (d)		206,895
	3,786,300	Mereo BioPharma Group PLC - CVR (Issue Date 4/23/19) (a) (c) (d)		0
				563,815
		TOTAL RIGHTS
		(Cost $0)		563,815
		WARRANTS - 0.0%
		Materials - 0.0%
	364,100	Perimeter Solutions SA (Expiration Date 11/8/24) (a)		178,409
		TOTAL WARRANTS
		(Cost $3,641)		178,409
Shares			Value
		SHORT-TERM INVESTMENTS - 4.4%
	317,136,370	Dreyfus Treasury Securities Cash Management Fund - Institutional Shares - 4.23% (e)	$	317,136,370
		TOTAL SHORT-TERM INVESTMENTS
		(Cost $317,136,370)		317,136,370
		TOTAL INVESTMENTS IN SECURITIES
		(Cost $4,327,295,750) - 99.9%		7,214,038,895
		Other Assets in Excess of Liabilities - 0.1%		4,295,730
		TOTAL NET ASSETS - 100.0%	$	7,218,334,625
ADR		American Depository Receipt
CAD		Canadian Dollars
CHF		Swiss Francs
CVR		Contingent Value Rights
EUR		Euros
GBP		British Pound Sterling
NOK		Norwegian Krone
(a)		Non-Income Producing
(b)		Considered an affiliated company of the fund as the fund owns 5% or more of the outstanding
		voting securities of such company.
(c)		Illiquid security
(d)		Fair-valued security
(e)		Rate quoted is seven-day yield at period end.
The Global Industry Classification Standard (GICS ®) was developed by and is the exclusive property of MSCI Inc. and Standard & Poor’s Financial Services LLC (“S&P”). GICS is a service mark of MSCI and S&P and has been licensed for use by the fund’s administrator.

Security Valuation

Securities traded on a national securities exchange are valued at the last reported sales price at the close of regular trading on each day the exchanges are open for trading. Securities traded on the National Association of Securities Dealers Automated Quotations (“NASDAQ”) are valued at the NASDAQ Official Closing Price, which may not necessarily represent the last sale price. Non-U.S. traded stocks are valued at the last sale price or official closing price in the primary local market where the stock is traded. Securities traded on an exchange for which there have been no sales are valued at the mean between the bid and ask price. Because trading on most non-U.S. exchanges is normally completed before the close of the New York Stock Exchange, the value of

securities traded on foreign exchanges can change by the time the Fund calculates its net asset value per share (“NAV”). To address these changes, the Fund may utilize adjustment factors provided by an independent pricing service to systematically value foreign securities at fair value. These adjustment factors are based on statistical analyses of subsequent movement in securities indices, specific security prices, and exchange rates in foreign markets.

Securities for which quotations are not readily available are valued at their respective fair values as determined in good faith by a valuation committee of the Investment Advisor in accordance with procedures approved by the Trust’s Board of Trustees. Pursuant to those procedures, the Board of Trustees has designated the Investment Advisor as the Fund’s valuation designee responsible for determining whether market quotations are readily available and reliable, and making good faith determinations of fair value when appropriate. In determining fair value, the Fund takes into account all relevant factors and available information.  Consequently, the price of a security used by the Fund to calculate its NAV may differ from quoted or published prices for the same security.  Fair value pricing involves subjective judgments, and there is no single standard for determining a security’s fair value.  As a result, different mutual funds could reasonably arrive at a different fair value for the same security. It is possible that the fair value determined for a security is materially different from the value that could be realized upon the sale of that security or from the values that other mutual funds may determine.

Investments in other funds are valued at their respective net asset values as determined by those funds, in accordance with the 1940 Act.

Valuation Measurements

The Fund has adopted fair valuation accounting standards which establish an authoritative definition of fair value and set forth a hierarchy for measuring fair value.  These standards require additional disclosure about the various inputs and valuation techniques used to develop the  measurements of fair value and a discussion of changes in valuation techniques and related inputs during the period.  These standards define fair value as the price that would be received in the sale of an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date.  The fair value hierarchy is organized into three levels based upon the assumptions (referred to as “inputs”) used to value the asset or liability.  These standards state that “observable inputs” reflect the significant assumptions that market participants would use in valuing an asset or liability based on market data obtained from independent sources.   “Unobservable inputs” reflect the Fund’s own assumptions about the inputs market participants would use to value the asset or liability.

Various inputs are used in determining the value of the Fund’s investments, and the lowest level for any significant input determines leveling.  These inputs are summarized in the three broad levels below:

Level 1      – Unadjusted quoted prices in active markets for identical securities to which the Trust has access at the date of measurement.

Level 2      – Other significant observable inputs (including quoted prices for similar or related securities in both active and inactive markets, interest rates, foreign exchange rates, and fair value estimates for foreign securities indices).

Level 3      – Significant unobservable inputs to the extent observable inputs are unavailable (including the Fund’s own assumptions in determining fair value of investments based on the best available information).

The following table provides the fair value measurements of the Fund assets by level within the fair value hierarchy for the Fund as of January 31, 2023. These assets are measured on a recurring basis.

		Quoted prices		Significant
		in active		other		Significant
		markets for		observable		unobservable
		identical assets		inputs		inputs
Fund	Description	(Level 1)		(Level 2)		(Level 3)		Total
Aggressive	Common Stocks(1)	$	6,761,528,612	$	133,429,789	$	-	$	6,894,958,401
Growth Fund	Preferred Stocks(2)		1,201,900		-		-		1,201,900
	Rights(3)		-		-		563,815		563,815
	Warrants(4)		178,409		-		-		178,409
	Short-Term Investments		317,136,370		-		-		317,136,370
	Total Investments in Securities	$	7,080,045,291	$	133,429,789	$	563,815	$	7,214,038,895
(1) Refer to the Fund’s Schedule of Investments for the breakdown of major categories.
(2) Financials
(3) Health Care
(4) Materials
Following is a reconciliation of investments in which significant unobservable inputs (Level 3) were used in determining fair value.
	ABIOMED, Inc. - CVR (Issue Date 12/23/22)
						Aggressive
						Growth Fund
Balance at October 31, 2022						$	-
Purchases (Received)							356,920
Sales (Proceeds)							-
Realized Gain (Loss)							-
Change in Unrealized Appreciation/Depreciation							-
Balance at January 31, 2023						$	356,920
During the period ended January 31, 2023, the Fund determined the fair value of ABIOMED, Inc. (“ABIOMED”) CVR considering available information, including the value of ABIOMED stock prior to the issuance of the CVR. The likelihood of receiving payments pursuant to an agreement will depend on achievement of certain milestones.
	Epizyme, Inc. - CVR (Issue Date 8/15/22)
						Aggressive
						Growth Fund
Balance at October 31, 2022						$	206,895
Purchases (Received)							-
Sales (Proceeds)							-
Realized Gain (Loss)							-
Change in Unrealized Appreciation/Depreciation							-
Balance at January 31, 2023						$	206,895
During the period ended January 31, 2023, the Fund determined the fair value of Epizyme, Inc. (“Epizyme”) CVR considering available information, including the value of Epizyme stock prior to the issuance of the CVR. The likelihood of receiving payments pursuant to an agreement will depend on  achievement of certain milestones.

Other Affiliates
                                                           
Certain of the Funds’ investments are in companies that are considered to be affiliated companies of a Fund because the Fund owns 5% or more of the outstanding voting securities of the company. With respect to each such investment, refer to each Fund’s respective Schedule of Investments for the information on the sector of each such company, the number of shares of each such company held, and the percentages of net assets represented by such companies held in each sector. Transactions during the period in securities of these companies were as follows:

PRIMECAP Odyssey Aggressive Growth Fund
			Current Period Transactions
Common Stock	Market Value at October 31, 2022		Purchases at Cost		Proceeds from Securities Sold		Dividend Income		Realized Gain (Loss)			Change in Unrealized Gain (Loss)			Market Value at January 31, 2023
Calithera Biosciences, Inc.(1)	$	702,085	$	-	$	76,483	$	-	$	(13,601,986	)	$	13,028,336		$	N/A
Cerus Corp.(1)		33,718,482		-		1,430,338		-		(566,712	)		(3,933,688	)		N/A
Nektar Therapeutics		38,735,031		117,379		1,468,071		-		(4,390,342	)		(6,020,791	)		26,973,206
Pulmonx Corp.		49,234,152		170,119		-		-		-			(16,346,886	)		33,057,385
Rhythm Pharmaceuticals, Inc.		126,267,319		1,486,350		3,478,354		-		(603,045	)		11,383,589			135,055,859
Standard BioTools, Inc.(1)		4,652,896		-		286,899		-		(3,301,193	)		6,397,720			N/A
Xencor, Inc.		123,164,076		25,325,553		-		-		-			26,056,359			174,545,988
Total	$	376,474,041	$	27,099,401	$	6,740,145	$	-	$	(22,463,278	)	$	30,564,639		$	369,632,438
(1) No longer an affiliate as of January 31, 2023