PRIMECAP Odyssey Funds

What PRIMECAP Odyssey Funds does

PRIMECAP Odyssey Funds is a U.S. mutual fund complex managed by PRIMECAP Management Company, a privately held investment management firm co-founded in September 1983 by Theo A. Kolokotrones. The firm operates three growth-oriented equity mutual funds—the PRIMECAP Odyssey Stock Fund (POSKX), the PRIMECAP Odyssey Growth Fund (POGRX), and the PRIMECAP Odyssey Aggressive Growth Fund (POAGX)—with combined assets under management of approximately $14.89 billion as of 3/31/2026. The investment process is bottom-up and fundamentals-driven, executed under a distinctive multi-counselor model in which each of the five portfolio managers operates with full autonomy over a distinct sleeve of every fund, eschewing committee-based decision-making in favor of independent accountability.

The firm's core technology is its research and portfolio-construction methodology rather than a software platform. Portfolio managers conduct deep fundamental research through direct engagement with companies, competitors, suppliers, and customers, building independent views that are deliberately uncorrelated with Wall Street consensus. Average holding period is approximately ten years, against a 3-5 year stated horizon, and Active Share of 77%-83% confirms meaningful deviation from the S&P 500 benchmark. All three funds have outperformed the S&P 500 over since-inception, 10-year, and 3-year windows (e.g., Aggressive Growth Fund 14.05% annualized since inception versus 11.23% for S&P 500; 30.43% / 26.87% / 25.45% three-year annualized for Growth / Aggressive Growth / Stock).

PRIMECAP earns management fees through Total Annual Fund Operating Expenses of 0.66%-0.67% of assets under management, with a $2,000 minimum initial investment per fund ($1,000 for IRAs). Distribution is exclusively direct-to-consumer via the firm's website, mail, wire transfer, and a toll-free telephone line (1-800-729-2307), with Quasar Distributors, LLC acting as principal underwriter and U.S. Bancorp Fund Services providing transfer-agent and custody services out of Milwaukee, Wisconsin. The funds serve U.S. retail investors with long-term (3-5+ year) horizons, are offered only for sale in the United States, and the firm operates under five portfolio managers with 21-43 years of tenure, providing the deepest institutional continuity of any active U.S. mutual fund manager we have reviewed.

Name

PRIMECAP Odyssey Funds

Legal name

PRIMECAP Management Company

Website

https://primecap.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

11–50 employees

Short description

PRIMECAP Odyssey Funds is a U.S. mutual fund complex managed by PRIMECAP Management Company, offering three growth-equity mutual funds (Stock, Growth, Aggressive Growth) with ~$14.89B AUM, distributed direct-to-consumer to long-term U.S. retail investors.

Ownership category

akta.pro rank

Product category

Equity Mutual Funds

NAICS

Open-End Investment Funds (525910), Portfolio Management and Investment Advice (52394)

SIC

Investment Advice (6282)

akta.pro primary industry

Fund of Funds & Multi-Manager Mutual Funds (FSAAAEAL)

Keywords

• Equity mutual funds
• Investment management
• Active equity management
• Growth equity funds
• Long-term investing

Headquarters

HQ city

Milwaukee

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure, Others

Revenue model

1. Management fees: The firm earns management fees from its three mutual funds. The funds charge Total Annual Fund Operating Expenses ranging from 0.66% to 0.67% of assets under management. The Aggressive Growth Fund charges a 0.55% management fee plus 0.11% other expenses (0.66% total). The Stock Fund has total expenses of 0.67%. Revenue is generated as a percentage of assets under management across a combined fund complex of approximately $14.89 billion.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

PRIMECAP Odyssey Funds operates three equity mutual funds — the Stock Fund (POSKX), Growth Fund (POGRX), and Aggressive Growth Fund (POAGX) — under PRIMECAP Management Company. Each fund invests in equity securities selected through a bottom-up fundamental research process and is managed by multiple portfolio managers specializing in specific industry sectors. The funds pursue long-term capital appreciation with low portfolio turnover and are offered to individual investors as direct mutual fund share classes.

Product overview

PRIMECAP Odyssey Funds offers three distinct mutual funds managed by PRIMECAP Management Company using a bottom-up, fundamentals-driven investment approach. The fund family includes the PRIMECAP Odyssey Stock Fund (a core equity fund), PRIMECAP Odyssey Growth Fund (focused on above-average earnings growth), and PRIMECAP Odyssey Aggressive Growth Fund (targeting rapid earnings growth). Each fund operates with individual portfolio manager autonomy within their respective sleeves, emphasizing long-term value creation through fundamental stock selection.

Differentiator

Problem solved

Functional benefit

Brands

• PRIMECAP Odyssey Stock Fund: Growth-oriented equity mutual fund investing primarily in common stocks of U.S. companies with attractive growth prospects at reasonable valuations.
• PRIMECAP Odyssey Growth Fund
• PRIMECAP Odyssey Aggressive Growth Fund

Products and services

• PRIMECAP Odyssey Stock Fund (POSKX) A diversified equity mutual fund that invests primarily in U.S. common stocks across multiple sectors selected through bottom-up fundamental research. The fund is intended for long-term individual investors seeking capital appreciation and is managed jointly by multiple portfolio managers with sector specializations.
• PRIMECAP Odyssey Growth Fund (POGRX) A growth-oriented equity mutual fund that invests in common stocks of companies the managers believe are growing significantly faster than the average company. The fund is designed for long-term individual investors seeking concentrated exposure to faster-growing businesses.
• PRIMECAP Odyssey Aggressive Growth Fund (POAGX) An aggressive growth equity mutual fund that invests primarily in common stocks of small, mid-, and large-capitalization companies believed capable of generating significantly higher-than-average earnings growth. The fund targets long-term individual investors comfortable with greater volatility in pursuit of higher long-run returns.

Quantifiable outcome

• Aggressive Growth Fund: 14.05% annualized since inception (Nov 2004) vs. S&P 500 11.23%; 26.87% 3-year annualized vs. S&P 500 20.61%; 16.31% 10-year annualized vs. S&P 500 15.51%
• +3 more outcomes

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Quasar Distributors, LLCcoreChannel Partner/ Reseller/ DistributorQuasar Distributors, LLC serves as the principal underwriter and distributor for all PRIMECAP Odyssey Funds. This is a standard mutual fund distribution arrangement required for registered investment companies.

Scale indicators5 records

Recent moves4 records

Expansion highlights4 records

Direct peers

• Hartford Funds: Hartford Funds distributes a mid-sized family of actively managed US equity mutual funds, including growth-oriented strategies (e.g., Hartford Growth Opportunities) that compete for similar retail and advisor-sold investors. It represents a comparable mid-sized active mutual fund franchise with overlapping growth-equity exposure.
• Jensen Investment Management: Jensen runs a focused family of actively managed US equity mutual funds emphasizing quality, long-tenured companies with consistent earnings growth. Its concentrated, low-turnover, fundamentals-first approach is highly comparable to PRIMECAP Odyssey's investment style at a similar AUM scale.
• Harris Associates (Oakmark Funds): Oakmark Funds is a concentrated, long-term, fundamental value-tilted active mutual fund family with low turnover and high active share, run by a stable tenured investment team. Its approach to identifying undervalued companies with multi-year holding periods parallels PRIMECAP's long-horizon philosophy, making it a strong direct comparable.
• Dodge & Cox: Dodge & Cox runs a multi-manager, fundamental, long-horizon active mutual fund family (Stock, Balanced, Bond, Income) with a similar committee-of-analysts investment culture and similarly low expense ratios. It is the closest philosophical and structural comparable to PRIMECAP Odyssey in the US active mutual fund space.
• Sequoia Fund: Sequoia Fund is a concentrated, long-term US equity mutual fund famous for its multi-decade outperformance and patient capital approach. Its investor base, low-turnover philosophy, and willingness to hold companies for 10+ years closely mirror PRIMECAP Odyssey's investment culture, making it one of the most philosophically aligned peers.
• American Funds (Capital Group): American Funds operates one of the most prominent multi-manager mutual fund complexes, with multiple portfolio managers running autonomous sleeves within each fund. The structure, active growth/equity orientation, and long-term fundamental approach closely mirror PRIMECAP Odyssey's multi-counselor model, though at substantially greater AUM scale.
• MFS Investment Management: MFS is one of the oldest US active mutual fund managers, with a research-driven, long-term approach and a similar growth/equity product set (e.g., Massachusetts Investors Growth Stock). Its mutual fund structure, fund family composition, and growth-equity focus position it as a direct peer to PRIMECAP Odyssey.
• T. Rowe Price: T. Rowe Price is a long-tenured, fundamentally-driven active mutual fund manager with a strong growth equity franchise (e.g., T. Rowe Price Growth Stock). Like PRIMECAP, it emphasizes bottom-up research and long holding periods, and it is a frequent head-to-head competitor in advisor-sold and direct channels.

Broad incumbents

• Fidelity Investments (Equity Funds): Fidelity offers a broad suite of actively managed equity mutual funds (e.g., Fidelity Contrafund, Fidelity Growth Company) competing in the same retail and advisor channels. While Fidelity is much larger and multi-asset, its flagship active growth funds are among the most direct substitutes for PRIMECAP Odyssey Aggressive Growth.
• Wellington Management: Wellington is a large, established global active asset manager offering fundamental equity strategies alongside fixed income and multi-asset solutions. While not exclusively mutual funds, its bottom-up fundamental equity approach and long manager tenures make it a broad comparable for PRIMECAP's investment style.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about PRIMECAP Odyssey Funds