EXHIBIT 31
CERTIFICATIONS
I, Kevin W. Sharer, Chairman of the Board, Chief Executive Officer and President
of Amgen Inc., certify that:
1. I have reviewed this quarterly report on Form 10-Q of Amgen Inc.;
2. Based on my knowledge, this quarterly report does not contain any
untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances
under which such statements were made, not misleading with respect
to the periods covered by this quarterly report;
3. Based on my knowledge, the financial statements, and other financial
information included in this quarterly report, fairly present in all
material respects the financial condition, results of operations and
cash flows of the registrant as of, and for, the periods presented
in this quarterly report;
4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
registrant and have:
(a) Designed such disclosure controls and procedures, or caused
such disclosure controls and procedures to be designed under
our supervision, to ensure that material information relating
to the registrant, including its consolidated subsidiaries, is
made known to us by others within those entities, particularly
during the period in which this quarterly report is being
prepared;
(b) Evaluated the effectiveness of the registrant's disclosure
controls and procedures and presented in this quarterly report
our conclusions about the effectiveness of the disclosure
controls and procedures, as of the end of the periods covered
by this quarterly report based on such evaluation; and
(c) Disclosed in this quarterly report any change in the
registrant's internal control over financial reporting that
occurred during the registrant's most recent fiscal quarter
(the registrant's fourth fiscal quarter in the case of an
annual report) that has materially affected, or is reasonably
likely to materially affect, the registrant's internal control
over financial reporting; and
5. The registrant's other certifying officers and I have disclosed,
based on our most recent evaluation of internal control over
financial reporting, to the registrant's auditors and the audit
committee of the registrant's board of directors (or persons
performing the equivalent functions):
(a) All significant deficiencies and material weaknesses in the
design or operation of internal control over financial reporting
which are reasonably likely to adversely affect the registrant's
ability to record, process, summarize and report financial
information; and
(b) Any fraud, whether or not material, that involves management
or other employees who have a significant role in the
registrant's internal control over financial reporting.
Date: August 6, 2004
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/s/ KEVIN W. SHARER
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Kevin W. Sharer
Chairman of the Board, Chief Executive
Officer and President
CERTIFICATIONS
I, Richard D. Nanula, Executive Vice President and Chief Financial Officer of
Amgen Inc., certify that:
1. I have reviewed this quarterly report on Form 10-Q of Amgen Inc.;
2. Based on my knowledge, this quarterly report does not contain any
untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances
under which such statements were made, not misleading with respect
to the periods covered by this quarterly report;
3. Based on my knowledge, the financial statements, and other financial
information included in this quarterly report, fairly present in all
material respects the financial condition, results of operations and
cash flows of the registrant as of, and for, the periods presented
in this quarterly report;
4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
registrant and have:
(a) Designed such disclosure controls and procedures, or caused
such disclosure controls and procedures to be designed under
our supervision, to ensure that material information relating
to the registrant, including its consolidated subsidiaries, is
made known to us by others within those entities, particularly
during the period in which this quarterly report is being
prepared;
(b) Evaluated the effectiveness of the registrant's disclosure
controls and procedures and presented in this quarterly report
our conclusions about the effectiveness of the disclosure
controls and procedures, as of the end of the periods covered
by this quarterly report based on such evaluation; and
(c) Disclosed in this quarterly report any change in the
registrant's internal control over financial reporting that
occurred during the registrant's most recent fiscal quarter
(the registrant's fourth fiscal quarter in the case of an
annual report) that has materially affected, or is reasonably
likely to materially affect, the registrant's internal control
over financial reporting; and
5. The registrant's other certifying officers and I have disclosed,
based on our most recent evaluation of internal control over
financial reporting, to the registrant's auditors and the audit
committee of the registrant's board of directors (or persons
performing the equivalent functions):
(a) All significant deficiencies and material weaknesses in the
design or operation of internal control over financial reporting
which are reasonably likely to adversely affect the registrant's
ability to record, process, summarize and report financial
information; and
(b) Any fraud, whether or not material, that involves management
or other employees who have a significant role in the
registrant's internal control over financial reporting.
Date: August 6, 2004
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/S/ RICHARD D. NANULA
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Richard D. Nanula
Executive Vice President
and Chief Financial Officer