OAK ASSOCIATES LTD /OH/
13F-HR, 2000-11-13
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<PAGE>   1
FORM
13F

      INFORMATION REGUIRED OF INSTITUTIONAL INVESTMENT MANAGERS PURSUANT TO
                        SECTION 13(f) OF THE SECURITIES
                    EXCHANGE ACT OF 1934 AND RULES THEREUNDER

                       Securities and Exchange Commission
                             Washington, D.C. 20549






        Report for the Calendar Year or Quarter Ended September 30, 2000



Name of Institutional Investment Manager:

  OAK ASSOCIATES, LTD.                      #28-2338

Business Address:

3875 EMBASSY PARKWAY, #250    AKRON, OHIO  44333

Name, Phone No., and Title of Person      Duly Authorized to Submit This Report.

  JAMES D. OELSCHLAGER,                   MANAGING MEMBER        (330) 668-1234

               ATTENTION --   Intentional misstatements or omissions of facts
                              constitute Federal Criminal Violations. See 18
                              U.S.C. 1001 and 15 U.S.C. 78ff(a).

                    The institutional investment manager submitting this Form
          and its attachments and the person by whom it is signed represent
          hereby that all information contained therein is true, correct and
          complete. It is understood that all required items, statements and
          schedules are considered integral parts of this Form and that the
          submission of any amendment represents that all unattended items,
          statements and schedules remain true, correct and complete as
          previously submitted.

                    Pursuant to the requirements of Securities Exchange Act of
          1934, the undersigned institutional investment manager has caused this
          report to be signed on its behalf in the City of AKRON and State of
          OHIO on the 10th day of November 2000

                                                JAMES D. OELSCHLAGER

                                  (Manual Signature of Person Duly Authorized
                                              to Submit This Report)


Name and 13F file numbers of ALL Institutional Investment Managers with respect
to which this schedule is filed (other than the one filing this report): (List
in alphabetical order).

13F File Numbers will be assigned to Institutional Investment Managers after
they file their first report.


<PAGE>   2

<TABLE>
<CAPTION>

                                                                                                         FORM 13F INFORMATION TABLE

                                                           VALUE   SHARES/  SH/ PUT/ INVSTMT    OTHER          VOTING AUTHORITY
        NAME OF ISSUER          TITLE OF CLASS    CUSIP   (x$1000) PRN AMT  PRN CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------
<S>                            <C>              <C>       <C>      <C>      <C> <C>  <C>     <C>          <C>      <C>      <C>
ADVENT SOFTWARE                COM              007974108    24393   349100 SH       SOLE        349100

AKAMAI TECHNOLOGIES            COM              00971T101    33106   630400 SH       SOLE        630400

AMERICAN EXPRESS CO            COM              025816109      401     6600 SH       SOLE          6600

AMERICAN HOME PRODUCTS         COM              026609107     3185    56310 SH       SOLE         56310

AMERICAN INT'L. GRP            COM              026874107  1160075 12123594 SH       SOLE      11891390

AMGEN INC                      COM              031162100      852    12200 SH       SOLE         12200

ANHEUSER-BUSCH CO INC          COM              035229103      491    11600 SH       SOLE         11600

APPLIED MATERIALS              COM              038222105  1262047 21277932 SH       SOLE      20973552

ATMEL CORP.                    COM              049513104   306704 20194555 SH       SOLE      20045848

AVANEX CORP COM                COM              05348W109    31079   288600 SH       SOLE        288600

BANK OF AMERICA CORP.          COM              060505104      974    18607 SH       SOLE         16501

BANK ONE CORP                  COM              059438101     1008    26109 SH       SOLE         26109

BRISTOL MYERS SQUIBB           COM              110122108      500     8750 SH       SOLE          8750

BROADCOM CORP CL A             COM              111320107   115557   474080 SH       SOLE        474080

BROCADE COMMUNICATIONS         COM              111621108  1330064  5635868 SH       SOLE       5530831

CACHEFLOW INC                  COM              126946102   326043  2280020 SH       SOLE       2280020

CHASE MANHATTAN CORP           COM              16161A108     4221    91380 SH       SOLE         91380

CIENA CORP.                    COM              171779101  1897517 15450524 SH       SOLE      15121838

CISCO SYSTEMS                  COM              17275R102  5154604 93296024 SH       SOLE      92837977

CITIGROUP INC.                 COM              172967101  1219426 22555888 SH       SOLE      22177428

COMMERCE ONE INC DEL           COM              200693109     2038    25963 SH       SOLE         25963
</TABLE>


                                     Page 1
<PAGE>   3


<TABLE>

<S>                            <C>              <C>       <C>      <C>      <C> <C>  <C>     <C>          <C>      <C>      <C>
COMPAQ COMPUTER                COM              204493100      331    12000 SH       SOLE        12000

CORNING GLASS WORKS            COM              219350105   284271   957143 SH       SOLE       957143

DELL COMPUTER                  COM              247025109     4433   143880 SH       SOLE       143880

DIGEX INC.                     COM              253756100    65113  1389080 SH       SOLE      1389080

DIGITAL LIGHTWAVE INC COM      COM              253855100     1633    22481 SH       SOLE        22481

EARTHLINK                      COM              270321102    11180  1225200 SH       SOLE      1225200

ELI LILLY & CO.                COM              532457108   575446  7093334 SH       SOLE      7087524

EMC CORP.                      COM              268648102  1921684 19386491 SH       SOLE     19089314

EXODUS COMMUNICATIONS          COM              302088109   254206  5148470 SH       SOLE      5143120

EXPRESS SCRIPTS INC.           COM              302182100    62661   867280 SH       SOLE       867280

EXTREME NETWORKS, INC.         COM              30226D106    67269   587500 SH       SOLE       587500

FIRST DATA CORP                COM              319963104    31549   807658 SH       SOLE       807658

FIRSTMERIT CORP.               COM              337915102     2743   119566 SH       SOLE       119566

FLEETBOSTON FINL CORP COM      COM              339030108      934    23960 SH       SOLE        23960

FOREST LABORATORIES INC.       COM              345838106     6606    57600 SH       SOLE        57600

FOUNDRY NETWORKS               COM              35063R100   271266  4052536 SH       SOLE      4052336

FRANKLIN RES INC               COM              354613101     4105    92400 SH       SOLE        92400

GANNETT CO INC                 COM              364730101      636    12000 SH       SOLE        12000

GATEWAY                        COM              367626108      248     5300 SH       SOLE         5300

GENERAL DYNAMICS CORP          COM              369550108     1256    20000 SH       SOLE        20000

GENERAL ELECTRIC               COM              369604103    12136   210380 SH       SOLE       210380

GLIMCHER REALTY TRUST          COM              379302102      535    35800 SH       SOLE        35800

HRPT PPTYS TR COM SH BEN INT   COM              40426W101      307    43900 SH       SOLE        43900

INTEGRATED DEVICE TECH COM     COM              458118106    78192   864000 SH       SOLE       864000

INTEL CORP                     COM              458140100  1022049 24590668 SH       SOLE     24228136
</TABLE>


                                     Page 2
<PAGE>   4



<TABLE>

<S>                            <C>              <C>       <C>      <C>      <C> <C>  <C>     <C>          <C>      <C>      <C>
INTERNATIONAL FLAVORS & FRAGRA COM              459506101     1199    65700 SH       SOLE       65700

JDS UNIPHASE CORP COM          COM              46612J101  1112263 11746692 SH       SOLE    11552845

JNI CORP COM                   COM              46622G105    84639   951000 SH       SOLE      951000

JOHNSON & JOHNSON              COM              478160104     9027    96100 SH       SOLE       96100

JUNIPER NETWORKS               COM              48203R104   905148  4134281 SH       SOLE     4129713

LINEAR TECHNOLOGY CORP.        COM              535678106  1146034 17699392 SH       SOLE    17326622

MAXIM INTEGRATED PRODUCTS      COM              57772K101  1245532 15484489 SH       SOLE    15183502

MBNA CORP.                     COM              55262L100   686657 17835284 SH       SOLE    17259662

MBO PPTYS INC COM              COM              55263L109        3    10022 SH       SOLE       10022

MEDTRONIC INC                  COM              585055106   648011 12506870 SH       SOLE    12147055

MERCK & CO INC                 COM              589331107   956278 12846739 SH       SOLE    12593284

MICROSOFT                      COM              594918104   834899 13842899 SH       SOLE    13604740

MORGAN STANLEY DEAN WITTER & C COM              617446448   724968  7928575 SH       SOLE     7702520

NETWORK APPLIANCE              COM              64120L104   431322  3386387 SH       SOLE     3207010

NEWPORT CORP.                  COM              651824104   108810   683200 SH       SOLE      683200

NEXTEL COMMUNICATIONS INC CLAS COM              338898109    37983   812466 SH       SOLE      812466

NORTEL NETWORKS NEW            COM              656568102   496536  8336401 SH       SOLE     8335135

NOVELLUS SYS INC.              COM              670008101    88469  1900000 SH       SOLE     1900000

PARAMETRIC TECHNOLOGY          COM              699173100      506    46300 SH       SOLE       38400

PEPSICO INC.                   COM              713448108      759    16510 SH       SOLE       16510

PFIZER INC                     COM              717081103   816141 18161739 SH       SOLE    17714001

PHILIP MORRIS COS.             COM              718154107      484    16458 SH       SOLE       16458

PINE BROOK CAP INC CL A        COM              72246F109        0    10228 SH       SOLE       10228

PMC-SIERRA, INC.               COM              69344F106   654509  3040695 SH       SOLE     3038110

PROCTER & GAMBLE CO            COM              742718109     1506    22478 SH       SOLE       22478
</TABLE>


                                     Page 3
<PAGE>   5


<TABLE>

<S>                            <C>              <C>       <C>      <C>      <C> <C>  <C>     <C>          <C>      <C>      <C>
RF MICRODEVICES INC COM        COM              749941100     2560    80000 SH       SOLE      80000

SCHWAB CHARLES CORP            COM              808513105   252838  7122200 SH       SOLE    7122200

SDL INC                        COM              784076101    78117   252550 SH       SOLE     252550

SEMTECH                        COM              816850101    75719  1755800 SH       SOLE    1755800

STATE STREET BOSTON CORP       COM              857473102      637     4900 SH       SOLE       4900

SUN MICROSYSTEMS               COM              866810104   564917  4838706 SH       SOLE    4838531

SYCAMORE NETWORKS              COM              871206108   136705  1265794 SH       SOLE    1263999

TIBCO SOFTWARE INC COM         COM              88632Q103    80300   951000 SH       SOLE     951000

TRIQUINT SEMICONDUCTOR         COM              89674K103   101726  2791810 SH       SOLE    2785350

VERITAS SOFTWARE CO COM        COM              923436109    60180   423800 SH       SOLE     423800

VITESSE SEMICONDUCTOR CORP.    COM              928497106   326962  3676308 SH       SOLE    3673418

WAYNE BANCORP INC              COM              944293109      439    30521 SH       SOLE      30521

XILINX INC.                    COM              983919101   492359  5750198 SH       SOLE    5739656

CIENA CORP.                                     171779101    13656   111194 SH       SOLE     111194

NORTEL NETWORKS NEW                             656568102    13103   219993 SH       SOLE     219993

REPORT SUMMARY               86 DATA RECORDS              30746975        0 OTHER MANAGERS ON WHOSE BEHALF REPORT IS FILED.
</TABLE>



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