EX.99.CODE ETH

                             PRIMECAP ODYSSEY FUNDS

                         SUPPLEMENTAL CODE OF ETHICS FOR

                PRINCIPAL OFFICERS AND SENIOR FINANCIAL OFFICERS

                               SEPTEMBER 27, 2004

The Board of Trustees (collectively, the "Board") of PRIMECAP Odyssey Funds (the
"Trust") have adopted this Supplemental Code of Ethics (the "Code") for the
Trust's Principal Officers and Senior Financial Officers (the "Officers") to
guide and remind the Officers of their responsibilities to the Trust, other
officers, shareholders of the Trust, and governmental authorities. Officers are
expected to act in accordance with the guidance and standards set forth in this
Code.

For the purposes of this Code, the Trust's Principal Officers and Senior
Financial Officers shall include: the President; the Vice President, Chief
Financial Officer, Treasurer; the Controller; and any persons performing similar
functions on behalf of the Trust, regardless of whether such persons are
employed by the Trust or a third party.

This Code is intended to serve as the code of ethics described in Section 406 of
The Sarbanes-Oxley Act of 2002 and Form N-CSR. Officers may be subject to the
Trust's code of ethics adopted pursuant to Rule 17j-1 of the Investment Company
Act of 1940, as amended (the "Rule 17j-1 Code"). This Code also should be
interpreted in the context of all applicable laws, regulations, the Trust's
Agreements and Declarations of Trust, Bylaws, and all other governance and
disclosure policies and documents adopted by the Board. All Officers must become
familiar and fully comply with this Code. Because this Code cannot and does not
cover every applicable law or provide answers to all questions that might arise,
all Officers are expected to use common sense about what is right and wrong,
including a sense of when it is proper to seek guidance from others on the
appropriate course of conduct.

The purpose of this Code is to set standards for the Officers that are
reasonably designed to deter wrongdoing and are necessary to promote:

      o     honest and ethical conduct, including the ethical handling of actual
            or apparent conflicts of interest between personal and professional
            relationships;

      o     full, fair, accurate, timely, and understandable disclosure in
            reports and documents that the Trust files with, or submits to, the
            Securities and Exchange Commission (the "SEC") and in any other
            public communications by the Trust;

      o     compliance with applicable governmental laws, rules and regulations;

      o     the prompt internal reporting of violations of the Code to the
            appropriate persons as set forth in the Code; and

      o     accountability for adherence to the Code.


1. Honest and Ethical Conduct

a. Honesty, Diligence and Professional Responsibility

Officers are expected to observe both the form and the spirit of the ethical
principles contained in this Code. Officers must perform their duties and
responsibilities for the Trust:

      o     with honesty, diligence, and a commitment to professional and
            ethical responsibility;

      o     carefully, thoroughly and in a timely manner; and

      o     in conformity with applicable professional and technical standards.

Officers who are certified public accountants are expected carry out their
duties and responsibilities in a manner consistent with the principles governing
the accounting profession, including any guidelines or principles issued by the
Public Company Accounting Oversight Board or the American Institute of Certified
Public Accountants from time to time.

b. Objectivity / Avoidance of Undisclosed Conflicts of Interest

Officers are expected to maintain objectivity and resolve conflicts of interest
in an ethical manner. In the performance of their duties and responsibilities
for the Trust, Officers must not subordinate their judgment to personal gain and
advantage, or be unduly influenced by their own interests or by the interests of
others except those of the Trust. Officers must avoid participation in any
activity or relationship that would give rise to a conflict of interest unless
that conflict has been completely disclosed to affected parties. Further,
Officers should avoid participation in any activity or relationship that could
create the appearance of a conflict of interest.

A conflict of interest would generally arise if an Officer directly or
indirectly participated in any investment, interest, association, activity or
relationship that may impair or appear to impair the Officer's ability to
perform his/her job objectively.

Although typically not presenting an opportunity for improper personal benefit,
conflicts arise from, or as a result of, the contractual relationship between
the Trust and the investment adviser or administrator of which the Officers are
also officers or employees. As a result, this Code recognizes that the Officers
will, in the normal course of their duties (whether formally for the Trust or
for the adviser, or for both), be involved in establishing policies and
implementing decisions that will have different effects on the adviser and the
Company. The participation of the Officers in such activities is inherent in the
contractual relationship between the Trust and the adviser and is consistent
with the performance by the Officers of their duties as officers of the Trust.
Thus, if performed in conformity with the provisions of the Investment Company
Act and the Investment Advisers Act, such activities will be deemed to have been
handled ethically. In addition, it is recognized by the Trust's Boards of
Trustees that the Officers may also be officers or employees of one or more
other investment companies covered by this or other codes.

Any Officer who is involved in a situation or activity that might be a conflict
of interest or give the appearance of a conflict of interest must report such
situation or activity using the reporting procedures set forth in Section 4 of
this Code.


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There are some conflict of interest situations that should always be discussed
with the General Counsel, if material. Examples of these include:

      o     service as a director on the board of any public company;

      o     the receipt of any non-nominal gifts;

      o     the receipt of any entertainment from any company with which the
            Trust has current or prospective business dealings unless such
            entertainment is business-related, reasonable in cost, appropriate
            as to time and place, and not so frequent as to raise any question
            of impropriety;

      o     any ownership interest in, or any consulting or employment
            relationship with, any of the Trust's service providers, other than
            its investment adviser, principal underwriter, administrator or any
            affiliated person thereof;

      o     a direct or indirect financial interest in commissions, transaction
            charges or spreads paid by the Trust for effecting portfolio
            transactions or for selling or redeeming shares other than an
            interest arising from the Officer's employment, such as compensation
            or equity ownership.

The Audit Committee will not be responsible for monitoring or enforcing this
conflict of interest policy, but rather each Officer is responsible for
self-compliance with this conflict of interest policy.

c. Preparation of Financial Statements

Officers must not knowingly make any misrepresentations regarding the Trust's
financial statements or any facts in the preparation of the Trust's financial
statements, and must comply with all applicable laws, standards, principles,
guidelines, rules and regulations in the preparation of the Trust's financial
statements. This section is intended to prohibit:

      o     making, or permitting or directing another to make, materially false
            or misleading entries in the Trust's financial statements or
            records;

      o     failing to correct the Trust's financial statements or records that
            are materially false or misleading when he or she has the authority
            to record an entry; and

      o     signing, or permitting or directing another to sign, a document
            containing materially false or misleading financial information.

Officers must be scrupulous in their application of generally accepted
accounting principles. No Officer may (i) express an opinion or state
affirmatively that the financial statements or other financial data of the Trust
are presented in conformity with generally accepted accounting principles, or
(ii) state that he or she is not aware of any material modifications that should
be made to such statements or data in order for them to be in conformity with
generally accepted accounting principles, if such statements or data contain any
departure from generally accepted accounting principles then in effect in the
United States.


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Officers must follow the laws, standards, principles, guidelines, rules and
regulations established by all applicable governmental bodies, commissions or
other regulatory agencies in the preparation of financial statements, records
and related information. If an Officer prepares financial statements, records or
related information for purposes of reporting to such bodies, commissions or
regulatory agencies, the Officer must follow the requirements of such
organizations in addition to generally accepted accounting principles.

If an Officer and his or her supervisor have a disagreement or dispute relating
to the preparation of financial statements or the recording of transactions, the
Officer should take the following steps to ensure that the situation does not
constitute an impermissible subordination of judgment:

      o     The Officer should consider whether (i) the entry or the failure to
            record a transaction in the records, or (ii) the financial statement
            presentation or the nature or omission of disclosure in the
            financial statements, as proposed by the supervisor, represents the
            use of an acceptable alternative and does not materially
            misrepresent the facts or result in an omission of a material fact.
            If, after appropriate research or consultation, the Officer
            concludes that the matter has authoritative support and/or does not
            result in a material misrepresentation, the Officer need do nothing
            further.

      o     If the Officer concludes that the financial statements or records
            could be materially misstated as a result of the supervisor's
            determination, the Officer should follow the reporting procedures
            set forth in Section 4 of this Code.

d. Obligations to the Independent Auditor of the Trust

In dealing with the Trust's independent auditor, Officers must be candid and not
knowingly misrepresent facts or knowingly fail to disclose material facts, and
must respond to specific inquiries and requests by the Trust's independent
auditor.

Officers must not take any action, or direct any person to take any action, to
fraudulently influence, coerce, manipulate or mislead the Trust's independent
auditor in the performance of an audit of the Trust's financial statements for
the purpose of rendering such financial statements materially misleading.

2. Full, Fair, Accurate, Timely and Understandable Disclosure

It is the Trust's policy to provide full, fair, accurate, timely, and
understandable disclosure in reports and documents that the Trust files with, or
submits to, the SEC and in any other public communications by the Trust. The
Trust has designed and implemented Form N-CSR and Form N-Q Controls and
Procedures to carry out this policy.

Officers are expected to use their best efforts to promote, facilitate, and
prepare full, fair, accurate, timely, and understandable disclosure in all
reports and documents that the Trust files with, or submits to, the SEC and in
any other public communications by the Trust.

Officers must review the Trust's Disclosure Controls and Procedures to ensure
they are aware of and carry out their duties and responsibilities in accordance
with the Disclosure Controls and Procedures and the public reporting obligations
of the Trust. Officers are responsible for monitoring the integrity and
effectiveness of the Trust's Disclosure Controls and Procedures.


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3. Compliance with Applicable Laws, Rules and Regulations

Officers are expected to know, respect and comply with all laws, rules and
regulations applicable to the conduct of the Trust's business. If an Officer is
in doubt about the legality or propriety of an action, business practice or
policy, the Officer should seek advice from the Officer's supervisor or the
Trust's legal counsel.

In the performance of their work, Officers must not knowingly be a party to any
illegal activity or engage in acts that are discreditable to the Trust.

Officers are expected to promote the Trust's compliance with applicable laws,
rules and regulations. To promote such compliance, Officers may establish and
maintain mechanisms to educate employees carrying out the finance and compliance
functions of the Trust about any applicable laws, rules or regulations that
affect the operation of the finance and compliance functions and the Trust
generally.

4. Reporting of Illegal or Unethical Behavior

Officers should promptly report any conduct or actions by an Officer that do not
comply with the law or with this Code. Officers and the Trust shall adhere to
the following reporting procedures:

      o     Any Officer who questions whether a situation, activity or practice
            is acceptable must immediately report such practice to the Trust's
            General Counsel. The General Counsel shall consider the matter and
            respond to the Officer within a reasonable amount of time. If the
            General Counsel determines that there has been a violation, it shall
            report such violation to the Audit Committee.

      o     If the Officer is not satisfied with the response of the General
            Counsel, the Officer must report the matter to the Chairman of the
            Audit Committee. If the Chairman is unavailable, the Officer may
            report the matter to any other member of the Audit Committee. The
            person receiving the report shall consider the matter, refer it to
            the full Audit Committee if he or she determines there has been a
            violation or that such referral is desirable for any other reason,
            and respond to the Officer within a reasonable amount of time.

      o     The Audit Committee and the Trust will not be responsible for
            monitoring or enforcing this reporting of violations policy, but
            rather each Officer is responsible for self-compliance with this
            reporting of violations policy.

      o     To the extent possible and as allowed by law, reports will be
            treated as confidential.

      o     If the Audit Committee determines that an Officer violated this
            Code, failed to report a known or suspected violation of this Code,
            or provided intentionally false or malicious information in
            connection with an alleged violation of this Code, the Audit
            Committee may recommend appropriate action to the Board and the
            Board may take disciplinary action against any such Officer. No
            Officer will be disciplined for reporting a concern in good faith.

      o     The Trust and the Audit Committee may report violations of the law
            to the appropriate authorities.


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5. Accountability and Applicability

All Officers will be held accountable for adherence to this Code. On an annual
basis, within 30 days of the beginning of each calendar year, each Officer shall
certify in writing his or her receipt, familiarity and commitment to compliance
with this Code, by signing the Acknowledgment Form (Appendix A to this Code),
and each Officer shall report his or her affiliations and other relationship
related to conflicts of interest as required by the Trust's annual Directors and
Officers Questionnaire.

This Code is applicable to all Officers, regardless of whether such persons are
employed by the Trust or a third party. If an Officer is aware of a person
("Potential Officer") who may be considered an Officer as defined by this Code,
the Officer should inform legal counsel to the Trust of such Potential Officer
so that a determination can be made regarding whether such Potential Officer has
completed or should complete an Acknowledgment Form. However, the absence of
such a determination will not be deemed to relieve any person of his or her
duties under this Code.

6. Disclosure of this Code

This Code shall be disclosed by at least one of the following methods in the
manner prescribed by the SEC, unless otherwise required by law:

      o     by filing a copy of the Code with the SEC;

      o     by posting the text of the Code on the Trust's website; or

      o     by providing, without charge, a copy of the Code to any person upon
            request.

7. Waivers, Approvals and Interpretations

The Trust's President is responsible for applying this Code to specific
situations in which questions are presented under it and has the authority to
interpret this Code in any particular situation. Any waiver of this Code,
including an implicit waiver, that has been granted to an Officer may be made by
the Trust's President and must be disclosed by the Trust in the manner
prescribed by law and as set forth above in Section 6 (Disclosure of this Code).
Notwithstanding the foregoing, any approvals or waivers of this Code sought by
the President must be made only by the Board or a committee of the Board to
which such responsibility has been delegated.

8. Amendments

This Code may be amended by the affirmative vote of a majority of the Board. Any
amendment of this Code, must be disclosed by the Trust in the manner prescribed
by law and as set forth above in Section 6 (Disclosure of this Code), unless
such amendment is deemed to be technical, administrative, or otherwise
non-substantive. Any amendments to this Code will be provided to the Officers.


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Appendix A

PRIMECAP ODYSSEY FUNDS

Certification and Acknowledgment of Receipt of Supplemental Code of Ethics for
Principal Officers and Senior Financial Officers

I acknowledge and certify that I have received a copy of the Supplemental Code
of Ethics for Principal Officers and Senior Financial Officers (the "Code"). I
understand and agree that it is my responsibility to read and familiarize myself
with the policies and procedures contained in the Code and to abide by those
policies and procedures.

I acknowledge my commitment to comply with the Code.


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Officer Name (Please Print)                     Officer Signature


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                                                Date


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