Shareholder Report
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6 Months Ended |
|
Apr. 30, 2026
USD ($)
$ / shares
|
|---|
| Shareholder Report [Line Items] |
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|
| Document Type |
N-CSRS
|
|
| Amendment Flag |
false
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|
| Registrant Name |
PRIMECAP
Odyssey Funds
|
|
| Entity Central Index Key |
0001293967
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| Entity Investment Company Type |
N-1A
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|
| Document Period End Date |
Apr. 30, 2026
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| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
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| PRIMECAP Odyssey Stock Fund |
|
|
| Shareholder Report [Line Items] |
|
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| Fund Name |
PRIMECAP Odyssey Stock Fund
|
|
| Class Name |
PRIMECAP Odyssey Stock Fund
|
|
| Trading Symbol |
POSKX
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|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the PRIMECAP Odyssey Stock Fund (the “Fund”) for the period of November 1, 2025, to April 30, 2026.
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.primecap.com/funds/primecap-odyssey-stock-fund/#literature. You can also request this information by contacting us at 1-800-729-2307.
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|
| Additional Information Phone Number |
1-800-729-2307
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|
| Additional Information Website |
https://www.primecap.com/funds/primecap-odyssey-stock-fund/#literature
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|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
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|
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|
Fund Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment*
|
|
PRIMECAP Odyssey Stock Fund
|
$36
|
0.67%
|
|
[1] |
| Expenses Paid, Amount |
$ 36
|
|
| Expense Ratio, Percent |
0.67%
|
|
| Net Assets |
$ 4,430,881,578
|
|
| Holdings Count | $ / shares |
148
|
|
| Investment Company Portfolio Turnover |
3.00%
|
|
| Additional Fund Statistics [Text Block] |
KEY FUND STATISTICS (as of April 30, 2026)
|
|
|
Net Assets
|
$4,430,881,578
|
|
Number of Holdings
|
148
|
|
Portfolio Turnover
|
3%
|
|
|
| Holdings [Text Block] |
WHAT DID THE FUND INVEST IN? (% of net assets as of April 30, 2026)
|
|
|
Top 10 Issuers
|
(%)
|
|
Intel Corp.
|
8.2%
|
|
Eli Lilly & Co.
|
4.9%
|
|
AstraZeneca PLC
|
4.0%
|
|
KLA Corp.
|
3.1%
|
|
Flex Ltd.
|
3.0%
|
|
FedEx Corp.
|
2.5%
|
|
Siemens AG
|
2.5%
|
|
Alphabet, Inc. - Class A & C
|
2.4%
|
|
Ross Stores, Inc.
|
2.3%
|
|
Biogen, Inc.
|
2.3%
|
|
|
|
Top Sectors
|
(%)
|
|
Information Technology
|
27.6%
|
|
Industrials
|
21.8%
|
|
Health Care
|
21.2%
|
|
Financials
|
10.0%
|
|
Consumer Discretionary
|
6.7%
|
|
Communication Services
|
3.6%
|
|
Consumer Staples
|
2.4%
|
|
Energy
|
2.4%
|
|
Materials
|
2.2%
|
|
Utilities
|
0.0%
|
|
Cash & Other
|
2.1%
|
|
|
| Updated Prospectus Web Address |
https://www.primecap.com/funds/primecap-odyssey-stock-fund/#literature
|
|
| PRIMECAP Odyssey Growth Fund |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
PRIMECAP Odyssey Growth Fund
|
|
| Class Name |
PRIMECAP Odyssey Growth Fund
|
|
| Trading Symbol |
POGRX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the PRIMECAP Odyssey Growth Fund (the “Fund”) for the period of November 1, 2025, to April 30, 2026.
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.primecap.com/funds/primecap-odyssey-growth-fund/#literature. You can also request this information by contacting us at 1-800-729-2307.
|
|
| Additional Information Phone Number |
1-800-729-2307
|
|
| Additional Information Website |
https://www.primecap.com/funds/primecap-odyssey-growth-fund/#literature
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
|
|
|
|
Fund Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment*
|
|
PRIMECAP Odyssey Growth Fund
|
$35
|
0.66%
|
|
[2] |
| Expenses Paid, Amount |
$ 35
|
|
| Expense Ratio, Percent |
0.66%
|
|
| Net Assets |
$ 5,423,917,747
|
|
| Holdings Count | $ / shares |
179
|
|
| Investment Company Portfolio Turnover |
3.00%
|
|
| Additional Fund Statistics [Text Block] |
KEY FUND STATISTICS (as of April 30, 2026)
|
|
|
Net Assets
|
$5,423,917,747
|
|
Number of Holdings
|
179
|
|
Portfolio Turnover
|
3%
|
|
|
| Holdings [Text Block] |
WHAT DID THE FUND INVEST IN? (% of net assets as of April 30, 2026)
|
|
|
Top 10 Issuers
|
(%)
|
|
Micron Technology, Inc.
|
7.7%
|
|
Intel Corp.
|
5.1%
|
|
Alphabet, Inc. - Class A & C
|
4.9%
|
|
Eli Lilly & Co.
|
4.2%
|
|
Xometry, Inc.
|
3.4%
|
|
BeOne Medicines Ltd.
|
3.2%
|
|
Flex Ltd.
|
3.0%
|
|
Biogen, Inc.
|
2.1%
|
|
KLA Corp.
|
1.9%
|
|
NVIDIA Corp.
|
1.9%
|
|
|
|
Top Sectors
|
(%)
|
|
Information Technology
|
31.2%
|
|
Health Care
|
22.8%
|
|
Industrials
|
16.6%
|
|
Communication Services
|
7.8%
|
|
Financials
|
7.7%
|
|
Consumer Discretionary
|
7.3%
|
|
Consumer Staples
|
1.6%
|
|
Energy
|
1.1%
|
|
Materials
|
0.7%
|
|
Real Estate
|
0.2%
|
|
Cash & Other
|
3.0%
|
|
|
| Updated Prospectus Web Address |
https://www.primecap.com/funds/primecap-odyssey-growth-fund/#literature
|
|
| PRIMECAP Odyssey Aggressive Growth Fund |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
PRIMECAP Odyssey Aggressive Growth Fund
|
|
| Class Name |
PRIMECAP Odyssey Aggressive Growth Fund
|
|
| Trading Symbol |
POAGX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the PRIMECAP Odyssey Aggressive Growth Fund (the “Fund”) for the period of November 1, 2025, to April 30, 2026.
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.primecap.com/funds/primecap-odyssey-aggressive-growth-fund/#literature. You can also request this information by contacting us at 1-800-729-2307.
|
|
| Additional Information Phone Number |
1-800-729-2307
|
|
| Additional Information Website |
https://www.primecap.com/funds/primecap-odyssey-aggressive-growth-fund/#literature
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
|
|
|
|
Fund Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment*
|
|
PRIMECAP Odyssey Aggressive Growth Fund
|
$34
|
0.66%
|
|
[3] |
| Expenses Paid, Amount |
$ 34
|
|
| Expense Ratio, Percent |
0.66%
|
|
| Net Assets |
$ 6,765,772,559
|
|
| Holdings Count | $ / shares |
180
|
|
| Investment Company Portfolio Turnover |
6.00%
|
|
| Additional Fund Statistics [Text Block] |
KEY FUND STATISTICS (as of April 30, 2026)
|
|
|
Net Assets
|
$6,765,772,559
|
|
Number of Holdings
|
180
|
|
Portfolio Turnover
|
6%
|
|
|
| Holdings [Text Block] |
WHAT DID THE FUND INVEST IN? (% of net assets as of April 30, 2026)
|
|
|
Top 10 Issuers
|
(%)
|
|
Micron Technology, Inc.
|
10.5%
|
|
Alphabet, Inc. - Class A & C
|
3.6%
|
|
Flex Ltd.
|
3.6%
|
|
Eli Lilly & Co.
|
3.1%
|
|
BeOne Medicines Ltd.
|
2.9%
|
|
Rhythm Pharmaceuticals, Inc.
|
2.6%
|
|
NVIDIA Corp.
|
2.5%
|
|
Glaukos Corp.
|
2.3%
|
|
MarketAxess Holdings, Inc.
|
2.1%
|
|
Biogen, Inc.
|
2.0%
|
|
|
|
Top Sectors
|
(%)
|
|
Information Technology
|
35.6%
|
|
Health Care
|
24.3%
|
|
Industrials
|
13.1%
|
|
Consumer Discretionary
|
11.3%
|
|
Communication Services
|
7.1%
|
|
Financials
|
4.3%
|
|
Materials
|
1.8%
|
|
Consumer Staples
|
0.8%
|
|
Energy
|
0.3%
|
|
Real Estate
|
0.1%
|
|
Cash & Other
|
1.3%
|
|
|
| Updated Prospectus Web Address |
https://www.primecap.com/funds/primecap-odyssey-aggressive-growth-fund/#literature
|
|
|
|