UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 13F
Form 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: June 30, 2000
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Check here if Amendment [ ]; Amendment Number: ___
This Amendment (Check only one.): [ ] is a restatement.
[ ] adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: CASTLEARK MANAGEMENT L.L.C.
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Address: 101 N. WACKER DR. SUITE 610
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CHICAGO, IL 60606
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Form 13F File Number: 28-05573
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The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists and tables, are considered integral parts of this form.
Person Signing this Report on Behalf of Reporting Manager:
Name: JAMES H. CASTELLINI
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Title: CFO
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Phone: 312 456-9682
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Signature, Place, and Date of Signing:
/s/ JAMES H. CASTELLINI CHICAGO, IL AUG 14, 2000
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[Signature] [City, State] [Date]
Report Type (Check only one.):
[X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting
manager are reported in this report.
[ ] 13F NOTICE. (Check here if no holdings reported are in this report,
and all holdings are reported by other reporting manager(s).)
[ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for
this reporting manager are reported in this report and a portion are
reported by other reporting manager(s).)
List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.] NONE
Form 13F File Number Name
28- _________________ ___________________________________-
[Repeat as necessary.]
<PAGE>
Form 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: NONE
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Form 13F Information Table Entry Total: 210
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Form 13F Information Table Value Total: $614,669
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(thousands)
List of Other Included Managers: NONE
<PAGE>
<TABLE>
<CAPTION>
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>
A C T MANUFACTURING INC COM 000973107 669 14400 SH SOLE 900 0 13500
ABBOTT LABS INC COM 002824100 98 2200 SH SOLE 0 0 2200
ACCREDO HEALTH INC COM 00437V104 591 17100 SH SOLE 1100 0 16000
ACLARA BIOSCIENCES INC COM 00461P106 509 10000 SH SOLE 700 0 9300
ACTEL CORP COM 004934105 511 11200 SH SOLE 700 0 10500
ADELPHIA COMMUNICATIONS CORP COM 006848105 539 11500 SH SOLE 0 0 11500
ADMINISTAFF INC COM 007094105 959 15100 SH SOLE 900 0 14200
ADVANCED DIGITAL INFO CORP COM 007525108 166 10400 SH SOLE 1000 0 9400
ADVANCED MICRO DEVICES INC COM 007903107 3090 40000 SH SOLE 0 0 40000
ADVENT SOFTWARE INC COM 007974108 1113 17250 SH SOLE 1050 0 16200
A E S CORP COM 00130H105 8377 183600 SH SOLE 0 0 183600
A L PHARMA INC COM 020813101 545 8750 SH SOLE 550 0 8200
ALTEON WEBSYSTEMS INC COM 02145A109 455 4550 SH SOLE 350 0 4200
ALTERA CORP COM 021441100 1560 15300 SH SOLE 0 0 15300
AMERICAN INTL GROUP INC COM 026874107 14209 120927 SH SOLE 0 0 120927
AMERICREDIT CORP. COM 03060R101 471 27700 SH SOLE 1700 0 26000
AMGEN INC COM 031162100 5999 85400 SH SOLE 0 0 85400
ANADARKO PETROLEUM CORP COM 032511107 21224 430400 SH SOLE 107000 0 323400
APEX INC COM 037580107 888 20300 SH SOLE 1300 0 19000
APOLLO GROUP INC CL A COM 037604105 778 27800 SH SOLE 0 0 27800
APPLIED MATERIALS INC COM 038222105 4894 54000 SH SOLE 19000 0 35000
ARTHROCARE CORP COM 043136100 208 3900 SH SOLE 300 0 3600
ASTROPOWER INC COM 04644A101 9275 341950 SH SOLE 202050 0 139900
AUTOMATIC DATA PROCESSING INC COM 053015103 161 3000 SH SOLE 0 0 3000
BVR TECHNOLOGIES LTD COM M20514101 4 400 SH SOLE 0 0 400
BARRETT RESOURCES CORP COM 068480201 14452 474800 SH SOLE 128500 0 346300
BED BATH & BEYOND INC COM 075896100 870 24000 SH SOLE 0 0 24000
BEST BUY COMPANY INC COM 086516101 1265 20000 SH SOLE 5000 0 15000
BETHLEHEM STEEL CORP COM 087509105 178 50000 SH SOLE 50000 0 0
BIOGEN INC COM 090597105 1135 17600 SH SOLE 400 0 17200
BIOMET INC COM 090613100 1268 33000 SH SOLE 600 0 32400
BIOSITE DIAGNOSTICS INC COM 090945106 535 11100 SH SOLE 600 0 10500
BIO TECHNOLOGY GENERAL CORP COM 090578105 235 17800 SH SOLE 1100 0 16700
B J SERVICES CO COM 055482103 3125 50000 SH SOLE 0 0 50000
BEST BUY COMPANY INC COM 086516101 46 1600 SH SOLE 1600 0 0
BROADBASE SOFTWARE INC COM 11130R100 674 22000 SH SOLE 0 0 22000
BROADCOM CORP COM 111320107 12764 58300 SH SOLE 200 0 58100
BROADVISION INC COM 111412102 534 10500 SH SOLE 500 0 10000
BROADWING INC COM 111620100 10904 420400 SH SOLE 32000 0 388400
CALIFORNIA AMPLIFIER INC COM 129900106 490 10700 SH SOLE 700 0 10000
CARDINAL HEALTH INC COM 14149Y108 10946 147925 SH SOLE 0 0 147925
CELGENE CORP COM 151020104 6983 118600 SH SOLE 0 0 118600
CELL PATHWAYS INC COM 15114R101 353 15000 SH SOLE 15000 0 0
CHEAP TICKETS INC COM 162672109 336 28000 SH SOLE 2000 0 26000
CHECKFREE HOLDINGS CORP COM 162816102 433 8400 SH SOLE 0 0 8400
CIENA CORP COM 171779101 2150 12900 SH SOLE 200 0 12700
CINTAS CORP COM 172908105 1881 51275 SH SOLE 1000 0 50275
CIRCUIT CITY STORES INC COM 172737108 166 5000 SH SOLE 5000 0 0
CISCO SYSTEMS INC COM 17275R102 7589 119400 SH SOLE 15000 0 104400
CITIGROUP INC COM 172967101 11402 189250 SH SOLE 0 0 189250
CITRIX SYSTEMS INC COM 177376100 227 12000 SH SOLE 0 0 12000
COCA COLA CO COM 191219104 92 1600 SH SOLE 0 0 1600
COMCAST CORP CL A COM 200300101 3293 84700 SH SOLE 0 0 84700
COMCAST CORP-SPECIAL CL A COM 200300200 4512 111400 SH SOLE 0 0 111400
COMPUCREDIT CORP COM 20478N100 795 26500 SH SOLE 1700 0 24800
CONCORD E F S INC COM 206197105 9515 365950 SH SOLE 1000 0 364950
COOPER CAMERON CORP COM 216640102 18348 278000 SH SOLE 48000 0 230000
CORE INC COM 21867P102 55 8000 SH SOLE 8000 0 0
CORE LABORATORIES NV COM N22717107 2175 75000 SH SOLE 75000 0 0
CROSS TIMBERS OIL CO COM 227573102 10680 482725 SH SOLE 121800 0 360925
CYTYC CORP COM 232946103 870 16300 SH SOLE 700 0 15600
DEVRY INC COM 251893103 563 21300 SH SOLE 1300 0 20000
DIONEX CORP COM 254546104 1008 37700 SH SOLE 700 0 37000
WALT DISNEY CO COM 254687106 93 2400 SH SOLE 0 0 2400
DSP GROUP INC COM 23332B106 582 10400 SH SOLE 700 0 9700
D S T SYSTEMS INC COM 233326107 792 10400 SH SOLE 0 0 10400
E M C CORP COM 268648102 5632 73200 SH SOLE 0 0 73200
ELANTEC SEMICONDUCTOR INC COM 284155108 543 7800 SH SOLE 500 0 7300
ELECTRO SCIENTIFIC IND INC COM 285229100 339 7700 SH SOLE 500 0 7200
EMMIS COMMUNICTNS CORP CL A COM 291525103 505 12200 SH SOLE 800 0 11400
ENRON CORP COM 293561106 22124 343000 SH SOLE 68000 0 275000
ENSCO INTERNATIONAL INC COM 26874Q100 9057 252900 SH SOLE 137900 0 115000
EXAR CORP COM 300645108 881 10100 SH SOLE 650 0 9450
EXTREME NETWORKS INC COM 30226D106 791 7500 SH SOLE 0 0 7500
FASTENAL CO COM 311600104 643 12700 SH SOLE 0 0 12700
FINISAR CORP COM 31787A101 262 10000 SH SOLE 0 0 10000
FIRST DATA CORP COM 319963104 9171 184800 SH SOLE 0 0 184800
FISERV INC COM 337738108 10832 250450 SH SOLE 0 0 250450
FREEMARKETS INC COM 356602102 1532 32300 SH SOLE 0 0 32300
GASONICS INTERNATIONAL CORP COM 367278108 872 22100 SH SOLE 1300 0 20800
GENERAL ELECTRIC CO COM 369604103 382 7200 SH SOLE 0 0 7200
GILLETTE CO COM 375766102 51 1446 SH SOLE 0 0 1446
GLOBAL CROSSING LTD COM G3921A100 4999 190000 SH SOLE 0 0 190000
GLOBAL MARINE INC COM 379352404 16242 576200 SH SOLE 186200 0 390000
GO2NET INC COM 383486107 259 5150 SH SOLE 350 0 4800
GRANT PRIDECO INC COM 38821G101 1500 60000 SH SOLE 0 0 60000
GREY WOLF INC COM 397888108 9738 1947500 SH SOLE 2E+06 0 0
HAIN CELESTIAL GROUP INC COM 405217100 521 14200 SH SOLE 900 0 13300
HALLIBURTON CO COM 406216101 10145 215000 SH SOLE 50000 0 165000
HARKEN ENERGY CORP COM 412552101 6 10000 SH SOLE 10000 0 0
HEIDRICK & STRUGGLES INTL INC COM 422819102 505 8000 SH SOLE 500 0 7500
H N C SOFTWARE INC COM 40425P107 618 10000 SH SOLE 0 0 10000
HOME DEPOT INC COM 437076102 172 3450 SH SOLE 0 0 3450
ILLINOIS TOOL WORKS INC COM 452308109 889 15600 SH SOLE 0 0 15600
ILLUMINET HOLDINGS INC COM 452334105 397 7800 SH SOLE 500 0 7300
IN FOCUS SYSTEMS INC COM 452919103 753 23400 SH SOLE 1400 0 22000
INFOUSA INC COM 456818103 195 30000 SH SOLE 3000 0 27000
INKTOMI CORP COM 457277101 8538 72200 SH SOLE 0 0 72200
INSIGHT ENTERPRISES INC COM 45765U103 1198 20200 SH SOLE 1300 0 18900
INTEGRATED SILICON SOLUTION INC COM 45812P107 600 15800 SH SOLE 1000 0 14800
INTEL CORP COM 458140100 428 3200 SH SOLE 0 0 3200
INTUIT INC COM 461202103 765 18500 SH SOLE 500 0 18000
INTUITIVE SURGICAL INC COM 46120E107 236 25000 SH SOLE 2000 0 23000
JABIL CIRCUIT INC COM 466313103 7444 150000 SH SOLE 5000 0 145000
JDS UNIPHASE CORP COM 46612J101 10022 83600 SH SOLE 0 0 83600
KEANE INC COM 486665102 553 25550 SH SOLE 0 0 25550
KENT ELECTRONICS CORP COM 490553104 623 20900 SH SOLE 1300 0 19600
KOHLS CORP COM 500255104 9301 167200 SH SOLE 10000 0 157200
K V PHARMACEUTICALS CO COM 482740107 782 29500 SH SOLE 1900 0 27600
LEAP WIRELESS INTL INC COM 521863100 705 15000 SH SOLE 500 0 14500
LEXMARK INTL GROUP INC CL A COM 529771107 34 500 SH SOLE 0 0 500
LIQUID AUDIO INC COM 53631T102 814 86000 SH SOLE 2000 0 84000
L T V CORP COM 501921100 288 100000 SH SOLE 100000 0 0
LUCENT TECHNOLOGIES INC COM 549463107 212 3580 SH SOLE 0 0 3580
MACROVISION CORP COM 555904101 8093 126600 SH SOLE 400 0 126200
MANUGISTICS GROUP INC COM 565011106 407 8700 SH SOLE 700 0 8000
MARINE DRILLING COS INC COM 568240204 2976 106300 SH SOLE 20700 0 85600
MCMORAN EXPLORATION INC COM 582411104 2830 171500 SH SOLE 71500 0 100000
MEDIMMUNE INC COM 584699102 3552 48000 SH SOLE 6300 0 41700
MEDQUIST INC COM 584949101 292 8600 SH SOLE 600 0 8000
MEDTRONIC INC COM 585055106 13888 278796 SH SOLE 0 0 278796
MERCK & CO INC COM 589331107 153 2000 SH SOLE 0 0 2000
METRIS COMPANIES INC COM 591598107 523 20800 SH SOLE 1300 0 19500
M G I C INVESTMENT CORP WIS COM 552848103 673 14800 SH SOLE 0 0 14800
MICREL INC COM 594739101 547 12600 SH SOLE 600 0 12000
MICRON TECHNOLOGY INC COM 595112103 440 5000 SH SOLE 0 0 5000
MICROSOFT CORP COM 594918104 212 2650 SH SOLE 0 0 2650
MICROSTRATEGY INC COM 594972101 2112 70400 SH SOLE 0 0 70400
MKS INSTRUMENTS INC COM 55306N104 974 24900 SH SOLE 900 0 24000
MOTOROLA INC COM 620076109 221 3200 SH SOLE 200 0 3000
MOLEX INC CL A COM 608554200 8765 250437 SH SOLE 63500 0 186937
MOOG INC CL A COM 615394202 520 19700 SH SOLE 0 0 19700
MOTOROLA INC COM 620076109 135 4650 SH SOLE 0 0 4650
M SYS FLASH DISK PIONEERS LTD COM M7061C100 265 3400 SH SOLE 200 0 3200
NABORS INDUSTRIES INC COM 629568106 19352 465600 SH SOLE 76900 0 388700
NASDAQ 100 SHARES COM 631100104 1398 15000 SH SOLE 15000 0 0
NATIONAL OILWELL INC COM 637071101 901 27400 SH SOLE 2200 0 25200
NET2PHONE INC COM 64108N106 591 16550 SH SOLE 800 0 15750
NEWELL RUBBERMAID INC COM 651229106 538 20900 SH SOLE 0 0 20900
NEWPARK RESOURCES INC COM 651718504 3395 359700 SH SOLE 153700 0 206000
NICE SYSTEMS LTD COM 653656108 417 5400 SH SOLE 400 0 5000
99 CENTS ONLY STORES COM 65440K106 638 16000 SH SOLE 1000 0 15000
NOVELLUS SYSTEMS INC COM 670008101 701 12400 SH SOLE 400 0 12000
NUCOR CORP COM 670346105 27 800 SH SOLE 0 0 800
NUMERICAL TECHNOLOGIES INC COM 67053T101 973 20000 SH SOLE 1000 0 19000
OCEAN ENERGY INC COM 67481E106 7321 516000 SH SOLE 426500 0 89500
OMNICOM GROUP INC COM 681919106 8310 93300 SH SOLE 0 0 93300
ORACLE CORP COM 68389X105 7919 94200 SH SOLE 0 0 94200
ORTHODONTIC CENTERS OF AM INC COM 68750P103 446 19700 SH SOLE 1200 0 18500
OUTBACK STEAKHOUSE INC COM 686899102 734 25100 SH SOLE 0 0 25100
PAPA JOHNS INTERNATIONAL INC COM 698813102 581 23700 SH SOLE 0 0 23700
PARAMETRIC TECHNOLOGY CORP COM 699173100 14 1300 SH SOLE 0 0 1300
PAYCHEX INC COM 704326107 1369 32587 SH SOLE 0 0 32587
PE BIOSYSTEMS GROUP COM 69332S102 1080 16400 SH SOLE 400 0 16000
PE CORP COM 714041126 368 4000 SH SOLE 200 0 3800
PSS WORLD MEDICAL INC COM 69366A100 20 3000 SH SOLE 3000 0 0
PEPSICO INC COM 713448108 71 1600 SH SOLE 0 0 1600
PER-SE TECHNOLOGIES INC COM 713569309 24 2549 SH SOLE 0 0 2549
PF CHANGS CHINA BISTRO INC COM 69333Y108 613 19200 SH SOLE 1200 0 18000
PFIZER INC COM 717081103 120 2500 SH SOLE 0 0 2500
PHOTRONICS CORP COM 719405102 576 20300 SH SOLE 1300 0 19000
PLEXUS CORP COM 729132100 735 6500 SH SOLE 400 0 6100
POLYCOM INC COM 73172K104 932 9900 SH SOLE 400 0 9500
PRIMUS TELECOM GROUP INC COM 741929103 525 21100 SH SOLE 1600 0 19500
PRIORITY HEALTHCARE CORP COM 74264T102 1144 15400 SH SOLE 900 0 14500
PROVINCE HEALTHCARE CO COM 743977100 596 16500 SH SOLE 1000 0 15500
RADISYS CORP COM 750459109 616 10850 SH SOLE 700 0 10150
RAMBUS INC COM 750917106 3028 29400 SH SOLE 400 0 29000
REMEDY CORP COM 759548100 814 14600 SH SOLE 900 0 13700
ROWAN COMPANIES INC COM 779382100 2697 88800 SH SOLE 60000 0 28800
RURAL CELLULAR CORP COM 781904107 383 5000 SH SOLE 500 0 4500
SANGAMO BIOSCIENCES INC COM 800677106 138 5000 SH SOLE 0 0 5000
SCHLUMBERGER LTD COM 806857108 228 3050 SH SOLE 0 0 3050
CHARLES SCHWAB CORP COM 808513105 1296 38550 SH SOLE 0 0 38550
SEALED AIR CORP COM 81211K100 906 17300 SH SOLE 0 0 17300
SEPRACOR INC COM 817315104 1242 10300 SH SOLE 0 0 10300
SERVICEMASTER LTD PARTNERSHIP UNIT LTD PARTN 81760N109 546 48000 PRN SOLE 0 0 48000
SMITH INTERNATIONAL INC COM 832110100 10194 140000 SH SOLE 38000 0 102000
SOLECTRON CORP COM 834182107 15142 361600 SH SOLE 800 0 360800
SOUTHWEST AIRLINES CO COM 844741108 851 44950 SH SOLE 0 0 44950
SPRINT PCS GROUP INC COM 852061506 10418 175100 SH SOLE 4000 0 171100
STARBUCKS CORP COM 855244109 4403 115300 SH SOLE 1000 0 114300
STERICYCLE INC COM 858912108 710 29600 SH SOLE 1600 0 28000
STRYKER CORP COM 863667101 5324 121700 SH SOLE 0 0 121700
SUN MICROSYSTEMS INC COM 866810104 7002 77000 SH SOLE 0 0 77000
SUNGARD DATA SYSTEMS INC COM 867363103 1835 59200 SH SOLE 0 0 59200
TEKELEC INC COM 879101103 443 9200 SH SOLE 700 0 8500
TELLABS INC COM 879664100 356 5200 SH SOLE 0 0 5200
TEXACO INC COM 881694103 2663 50000 SH SOLE 50000 0 0
TEXAS INSTRUMENTS INC COM 882508104 4362 63500 SH SOLE 2400 0 61100
TIME WARNER INC COM 887315109 2500 32900 SH SOLE 0 0 32900
TITAN CORP COM 888266103 586 13100 SH SOLE 800 0 12300
TOLLGRADE COMMUNICATIONS INC COM 889542106 398 3000 SH SOLE 200 0 2800
TRANSOCEAN SEDCO FOREX INC COM G90078109 10490 196302 SH SOLE 0 0 196302
TRITON ENERGY LTD COM G90751101 6597 167800 SH SOLE 110300 0 57500
TUT SYSTEMS INC COM 901103101 316 5500 SH SOLE 500 0 5000
UNIT CORP COM 909218109 5117 379000 SH SOLE 321000 0 58000
VALERO ENERGY CORP COM 91913Y100 2381 75000 SH SOLE 75000 0 0
VENTRO CORP COM 922815105 328 17400 SH SOLE 400 0 17000
VERISIGN INC COM 92343E102 9014 51070 SH SOLE 200 0 50870
VERITAS SOFTWARE CO COM 923436109 1678 14850 SH SOLE 200 0 14650
VERITY INC COM 92343C106 232 6100 SH SOLE 400 0 5700
VITESSE SEMICONDUCTOR CORP COM 928497106 471 6400 SH SOLE 0 0 6400
WAL MART STORES INC COM 931142103 98 1700 SH SOLE 0 0 1700
WALGREEN CO COM 931422109 48 1500 SH SOLE 0 0 1500
WASTE CONNECTIONS INC COM 941053100 336 17000 SH SOLE 1000 0 16000
WEATHERFORD INTL INC COM 947074100 2389 60000 SH SOLE 0 0 60000
WEBTRENDS CORP COM 94844D104 306 7900 SH SOLE 500 0 7400
WORLDCOM INC COM 55268B106 10024 218500 SH SOLE 0 0 218500
WRIGLEY WILLIAM JR CO COM 982526105 1050 13100 SH SOLE 0 0 13100
</TABLE>
