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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. _________________)*
Qlogic Corporation
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(NAME OF ISSUER)
Common
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(TITLE OF CLASS OF SECURITIES)
747277101
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(CUSIP NUMBER)
Check the following box if a fee is being paid with this statement [ ]. (A fee
is not required only if the filing person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7).
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
Page 1 of 4 pages
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CUSIP NO. 747277101 13G PAGE _____ of _____ PAGES
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1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Driehaus Capital Management, Inc.
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
ILLINOIS, U.S.A.
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5 SOLE VOTING POWER
287,812
NUMBER OF
SHARES ----------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY
EACH 0
REPORTING
PERSON ----------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
482,938
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8 SHARED DISPOSITIVE POWER
0
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
482,938
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.52%
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12 TYPE OF REPORTING PERSON*
IA
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*SEE INSTRUCTION BEFORE FILLING OUT!
Page 2 of 4 pages
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Driehaus Capital Management, Inc.
SCHEDULE 13G
Item 1. (a) Name of Issuer: Qlogic Corporation
(b) Issuer's Principal Executive Offices:
3545 Harbor Blvd.
Costa Mesa, California 92626
Item 2. (a) Person Filing - Driehaus Capital Management, Inc.
(b) Address - 25 East Erie Street
Chicago, IL 60611
(c) Citizenship - U.S.A.
(d) Title of Class of Securities - Common
(e) CUSIP Number -747277101
Item 3. (e) Investment Adviser Registered under section 203 of
the Investment Advisers Act of 1940.
Item 4. (a) Amount Beneficially Owned - 482,938
(b) Percent of Class - 5.52%
(c) Number of shares as to which reporting person has:
(i) Sole voting power 287,812
(ii) Shared voting power 0
(iii) Sole dispositive power 482,938
(iv) Shared dispositive power 0
Item 5. Not Applicable
Item 6. The reporting person, Driehaus Capital Management, Inc.,
manages accounts for numerous clients on a fully
discretionary basis. Securities held in these clients'
accounts are included in this report to reflect the fact
that the reporting person may have voting power or
dispositive power. To the best of the reporting person's
knowledge, none of the clients whose securities are
included in this report have an ownership interest in the
subject class of securities which exceeds five percent of
the class.
Page 3 of 4
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Driehaus Capital Management, Inc.
Item 7. Not Applicable
Item 8. Not Applicable
Item 9. Not Applicable
Item 10. Certification
By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and are held in
the ordinary course of business and were not acquired and are not held
for the purpose of or with the effect of changing or influencing the
control of the issuer of the securities and were not acquired and are
not held in connection with or as a participant in any transaction
having that purpose or effect.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true,
complete and correct.
February 8, 1999
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Date
/s/ Mary H. Weiss
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Signature
Mary H. Weiss, Vice President
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Name/Title
Page 4 of 4
