13F-HR 1 rorer13f.txt United States Securities and Exchange Commission Washington, DC 20549 Form 13F Form 13F Cover Page Report for the Calendar Year or Quarter Ended: 03/31/06 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: Rorer Asset Management, LLC Address: Eight Tower Bridge 161 Washington St., Suite 1500 Conshohocken, PA 19428 13F File Number: 028-03869 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: Robert D. Leininger Title: Principal, Senior Equity Analyst, COO & CCO Phone: (484)530-4300 I AM SIGNING THIS REPORT AS REQUIRED BY THE SECURITIES EXCHANGE ACT OF 1934. Signature, Place and Date of Signing: _________________________________ Robert D. Leininger Conshohocken, PA May 3, 2006 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).)

RORER ASSET MANAGEMENT, LLC 13F REPORT AS OF ~~DECEMBER~~MARCH 31, ~~2004~~2006 TITLE VOTING AUTHORITY OF VALUE SH/ PUT/ INVESTMENT SOLE SHARED NONE NAME OF ISSUER CLASS CUSIP (X $1000) SHARES PRN CALL DISCRETION MANAGERS (A) (B) (C) ------------------------------------------------------------------------------------------------------------------------------------ AFLAC INC COMMON 001055102 $6746,~~606~~653.8932 1,~~867~~036,~~062~~425 SH DEFINED 01 1935,~~664,050~~882 ~~824~~567 ~~202~~99,~~188~~976 ~~ABBOTT~~AFFILIATED ~~LABS~~COMPUTER S COMMON ~~002824100~~008190100 $974,~~468~~169.1035 269,~~303,843~~947 SH DEFINED 01 268,~~057,734~~819 0 1,~~025~~128 ~~245~~AMERICAN INTL GROUP I COMMON 026874107 $41,~~084~~108.15 640,785 SH DEFINED 01 581,327 335 59,123 AMGEN INC COMMON 031162100 $3033,~~431~~292.4058 ~~523~~457,~~026~~630 SH DEFINED 01 ~~461~~400,~~172~~299 ~~225~~313 6157,~~629~~018 ~~BJS~~BJ ~~WHSL~~SVCS ~~CLUB~~CO ~~INC~~ COM COMMON ~~05548J106~~055482103 $737,~~503~~236.0772 ~~259~~1,~~504~~060,842 SH DEFINED 01 ~~248~~967,~~894~~424 ~~200~~533 1092,~~410~~885 ~~BANK~~BAXTER ~~NEW~~INTL ~~YORK~~ INC COM COMMON ~~064057102~~071813109 $8338,~~287~~844.5570 2993,~~777,904~~590 SH DEFINED 01 2896,~~451,908~~866 ~~1,315~~546 ~~324~~96,~~681~~178 BEAR STEARNS COS INC COMMON 073902108 $74,~~212~~165.7277 7030,~~862~~147 SH DEFINED 01 6729,~~977~~664 550 ~~2,830~~483 BERKSHIRE HATHAWAY IN COMMON 084670207 $~~308~~316.2826 105 SH DEFINED 01 0 0 105 ~~BEST~~BIOMET ~~BUY~~ INC COMMON ~~086516101~~090613100 $863,~~720~~157.7776 188,~~612,829~~901 SH DEFINED 01 187,~~438,680~~459 ~~700~~0 ~~173~~1,~~449~~442 ~~CIGNA~~CBS CORP ~~COM~~NEW CL B COMMON ~~125509109~~124857202 $~~101~~15,~~442~~590.6168 1599,~~370,826~~658 SH DEFINED 01 1544,~~220,454~~922 ~~605~~320 ~~149~~54,~~767~~416 ~~CVS~~CIGNA CORP COM COMMON ~~126650100~~125509109 $~~105~~35,~~908~~013.9013 2304,~~577,046~~506 SH DEFINED 01 2279,~~294,421~~412 ~~1,152~~144 ~~281~~24,~~473~~950 ~~CEPHALON~~CVS ~~INC~~CORP COM COMMON ~~156708109~~126650100 $647,~~465~~104.2693 ~~128~~1,~~831~~552,518 SH DEFINED 01 ~~123~~1,~~536~~398,838 ~~100~~863 5152,~~195~~817 CHEVRONTEXACO CORP. COMMON 166764100 $8330,~~992~~398.0977 1536,~~758,912~~833 SH DEFINED 01 1488,~~567,890~~854 ~~787~~282 ~~190~~47,~~235~~697 CISCO SYS INC COMMON 17275R102 $8041,~~527~~893.6922 41,~~589~~875,~~327~~361 SH DEFINED 01 41,~~089~~689,~~915~~341 21,~~021~~064 ~~497~~184,~~391~~956 CITIGROUP INC. COMMON 172967101 $9141,~~558~~814.0491 2888,~~090,622~~030 SH DEFINED 01 804,428 481 83,121 CLOROX CO COMMON 189054109 $1,~~861~~725.80 28,~~641~~856 ~~919~~SH ~~228~~DEFINED 01 28,~~062~~402 ~~COMPUTER~~0 ~~SCIENCES~~454 ~~COR~~COMMUNITY HEALTH SYS COMMON ~~205363104~~203668108 $43,~~219~~003.8956 7783,~~197~~086 SH DEFINED 01 7381,~~117~~727 500 41,~~030~~359 CONOCOPHILLIPS COM COMMON 20825C104 $8947,~~633~~102.0566 1760,~~135,156~~113 SH DEFINED 01 1689,~~012,350~~411 ~~503~~413 ~~122~~70,~~303~~289 CONSTELLATION ENERGY COMMON 210371100 $73,~~193~~560.1374 ~~155~~64,~~247~~990 SH DEFINED 01 ~~148~~63,~~912~~945 ~~120~~0 61,~~215~~045 CORNING INC COMMON 219350105 $33,076.50 1,188,087 SH DEFINED 01 1,071,676 657 115,754 CULLEN FROST BANKERS COMMON 229899109 $~~583~~430.2000 128,000 SH DEFINED 01 0 0 128,000 ~~DOVER~~DANAHER CORP SHS BEN COMMON ~~260003108~~235851102 $622,~~247~~312.1407 ~~154~~367,~~504~~911 SH DEFINED 01 ~~148~~335,~~199~~631 ~~120~~180 632,~~185~~100 EDISNEY ~~TRADE~~WALT ~~GROUP~~PRODTNS ~~INC~~COMMON ~~COM~~254687106 $27,840.96 964,645 SH DEFINED 01 873,228 531 90,886 DOW CHEMICAL CORP COMMON ~~269246104~~260543103 $728,~~518~~947.7627 ~~520~~707,~~396~~451 SH DEFINED 01 ~~499~~642,~~211~~140 ~~405~~382 2064,~~780~~929 ~~EASTMAN~~ENSCO ~~KODAK~~INTL INC COM COMMON ~~277461109~~26874Q100 $963,~~690~~672.1909 371,~~261,111~~422 SH DEFINED 01 270,~~920,484~~268 0 1,~~520~~154 ~~339,107~~E ~~ECHOSTAR~~TRADE ~~COMMUN~~GROUP ~~CORP~~INC COM COMMON ~~278762109~~269246104 $763,~~078~~362.0945 125,692 SH DEFINED 01 123,691 0 2,~~523~~001 EDUCATION MGMT CORP C COMMON 28139T101 $781.37 18,~~331~~783 SH DEFINED 01 18,406 0 377 EMULEX CORP COM NEW COMMON 292475209 $2,~~251~~619.16 153,~~337~~257 1SH DEFINED 01 150,~~117~~755 ~~270~~0 2,~~877~~502 EXXON MOBIL CORPORATI COMMON 30231G102 $7243,~~481~~451.1854 1728,~~552,551~~631 SH DEFINED 01 1662,~~385~~058 395 66,~~028~~178 ~~653~~FIRST ~~166~~MARBLEHEAD CORP COMMON 320771108 $2,~~870~~285.89 52,853 SH DEFINED 01 51,988 0 865 FISERV INC COM COMMON 337738108 $~~104~~38,~~799~~861.2280 2911,~~863,179~~416 SH DEFINED 01 2834,~~563,735~~025 ~~1,315~~431 ~~298~~76,~~129~~960 ~~FOREST~~FISHER ~~LABS~~SCIENTIFIC ~~INC~~INT COMMON ~~345838106~~338032204 $6027,~~483~~223.1342 1400,~~488,148~~090 SH DEFINED 01 356,560 243 43,287 FORWARD AIR CORP COM COMMON 349853101 $1,~~326~~504.58 40,~~192~~348 ~~651~~SH ~~161~~DEFINED 01 39,~~305~~702 ~~FREESCALE~~0 ~~SEMICONDUCT~~646 GAMESTOP CORPORATION COMMON ~~35687M206~~36467W109 $~~232~~2,584.8617 1254,~~683~~819 SH DEFINED 01 1153,~~983~~926 0 ~~700~~893 GENERAL ELEC CO COMMON 369604103 $9441,~~475~~472.6038 21,~~847~~177,~~768~~200 SH DEFINED 01 21,~~533~~063,~~359~~784 ~~1,248~~660 ~~313~~112,~~161~~756 ~~GOLDMAN~~HCC ~~SACHS~~INS ~~GROUP~~HLDGS IINC COM COMMON ~~38141G104~~404132102 $~~100~~4,~~266~~755.3424 1136,~~060,713~~900 SH DEFINED 01 ~~945~~134,~~299~~696 ~~460~~0 ~~114~~2,~~954~~204 ~~HEALTH~~HEWLETT ~~MGMT~~PACKARD ~~ASSOC INC~~ COMMON ~~421933102~~428236103 $523,~~458~~386.2713 ~~243~~689,~~063~~161 SH DEFINED 01 ~~233~~624,~~028~~894 ~~190~~365 963,~~845~~902 ~~HEWLETT~~HOME ~~PACKARD~~DEPOT INC COMMON ~~428236103~~437076102 $~~115~~16,~~473~~293.8153 6382,~~065,374~~139 SH DEFINED 01 5349,~~395,226~~414 ~~2,690~~187 ~~667~~32,~~458~~538 IINGRAM BMICRO MINC CL A COMMON ~~459200101~~457153104 $892,~~409~~657.7664 1132,~~003,218~~882 SH DEFINED 01 ~~893~~130,~~883~~683 ~~439~~0 ~~108~~2,~~896~~199 J.P. MORGAN CHASE & C COMMON 46625H100 $9044,~~769~~305.1005 21,~~564~~059,~~310~~013 SH DEFINED 01 2956,~~282,589~~997 ~~1,125~~582 ~~280~~101,~~596~~434 JOHNSON & JOHNSON COMMON 478160104 $9929,~~175~~541.4904 1512,~~721,492~~734 SH DEFINED 01 1465,~~532,973~~934 ~~773~~266 ~~187~~46,~~746~~534 ~~LEXMARK~~KLA-TENCOR ~~INTL~~CORP ~~GROUP~~COM IN COMMON ~~529771107~~482480100 $563,~~279~~561.4807 ~~730~~73,~~868~~640 SH DEFINED 01 ~~652~~72,~~471~~453 ~~324~~0 781,~~073~~187 ~~LINEAR~~L-3 ~~TECHNOLOGY~~COMMUNICATIONS ~~COR~~HL COMMON ~~535678106~~502424104 $550,~~500~~125.7779 ~~143~~611,~~497~~592 SH DEFINED 01 ~~137~~559,~~652~~771 ~~110~~300 551,~~735~~521 ~~LIZ~~LABORATORY ~~CLAIBORNE~~CORP ~~INC~~AMER COMMON ~~539320101~~50540R409 $645,~~362~~392.4065 ~~151~~790,~~137~~397 SH DEFINED 01 ~~144~~725,~~952~~178 ~~120~~388 664,~~065~~831 ~~LOWES~~MBIA COINC COMMON ~~548661107~~55262C100 $~~103~~32,~~720~~462.3792 1554,~~984,657~~784 SH DEFINED 01 1508,~~769,865~~093 ~~871~~260 ~~213~~46,~~921~~431 MCDONALDS CORP COMMON 580135101 $9847,~~564~~920.2420 31,~~380~~375,~~455~~841 SH DEFINED 01 31,~~010~~242,~~421~~740 1771 132,~~503~~330 ~~368~~MEDICIS PHARMACEUTICA COMMON 584690309 $2,~~531~~638.55 ~~MERCURY~~80,937 ~~GEN~~SH ~~CORP~~DEFINED ~~NEW~~01 79,623 0 1,314 MENS WEARHOUSE INC CO COMMON ~~589400100~~587118100 $62,~~705~~206.7950 ~~114~~61,~~301~~394 SH DEFINED 01 ~~109~~60,~~576~~390 900 41,~~635~~004 MICROSOFT CORP COMMON 594918104 $~~636~~43,942.7466 231,~~830~~576,310 SH DEFINED 01 01,421,460 880 153,970 MICROCHIP TECHNOLOGY COMMON 595017104 $2,826.09 77,932 SH DEFINED 01 76,687 0 231,~~830~~245 MORGAN ~~STANLY~~STANLEY DNCOM ~~WTTR~~ COMMON 617446448 $4443,~~449~~699.9848 ~~882~~711,~~496~~174 SH DEFINED 01 ~~790~~647,~~220~~429 ~~387~~380 9163,~~889~~365 MOTOROLA INC COMMON 620076109 $8351,~~772~~730.6101 52,~~376~~199,~~393~~174 SH DEFINED 01 41,~~784~~976,~~156~~830 21,~~375~~241 ~~589~~221,~~862~~103 ~~NAVISTAR~~NEWFIELD ~~INTL~~EXPL ~~CORP~~ CO COM COMMON ~~63934E108~~651290108 $62,~~965~~692.1789 ~~166~~64,~~309~~158 SH DEFINED 01 ~~159~~63,~~584~~119 ~~130~~0 61,~~595~~039 ~~NEWFIELD~~OFFICE ~~EXPL~~DEPOT COINC ~~COM~~ COMMON ~~651290108~~676220106 $74,~~644~~493.1295 ~~127~~120,~~521~~944 SH DEFINED 01 ~~122~~118,~~306~~994 ~~100~~0 51,~~115~~950 ~~POGO~~PARKER ~~PRODUCING~~HANNIFIN COCORP ~~COM~~COMMON 701094104 $4,142.96 51,480 SH DEFINED 01 50,643 0 837 PATTERSON-UTI ENERGY COMMON ~~730448107~~703481101 $3,~~691~~550.2555 76110,~~124~~954 SH DEFINED 01 70109,~~819~~173 ~~100~~0 51,~~205~~781 ~~PRICELINE~~PEPSI ~~COM~~BOTTLING GROUP COMMON 713409100 $1,716.28 56,516 SH DEFINED 01 55,623 0 893 PEPSICO INC COMMON 713448108 $37,358.31 659,144 SH DEFINED 01 598,273 362 60,509 PERKINELMER INC COM COMMON ~~741503403~~714046109 $63,~~210~~852.9495 ~~268~~164,~~047~~395 SH DEFINED 01 ~~257~~161,~~107~~746 ~~210~~0 102,~~730~~649 PFIZER INC COMMON 717081103 $21,482.08 817,108 SH DEFINED 01 740,729 449 75,930 PROCTER & GAMBLE COMP COMMON 742718109 $8037,~~918~~480.6312 1662,~~617,850~~610 SH DEFINED 01 1600,~~445~~962 358 61,~~295~~290 ~~677~~QUALCOMM ~~171~~INC COM COMMON 747525103 $29,~~878~~766.80 593,841 SH DEFINED 01 539,268 310 54,263 QUEST DIAGNOSTICS INC COMMON 74834L100 $~~103~~17,~~057~~570.0255 1349,~~183,087~~957 SH DEFINED 01 1319,~~058~~989 171 29,~~572~~797 ~~555~~RESPIRONICS ~~123~~INC COM COMMON 761230101 $2,~~960~~746.27 ~~RADIOSHACK~~70,580 SH DEFINED 01 69,430 0 1,150 SEI CORP COM COMMON ~~750438103~~784117103 $63,~~851~~765.5919 ~~207~~92,~~749~~916 SH DEFINED 01 ~~199~~91,~~269~~412 ~~160~~0 81,~~320~~504 ~~REEBOK~~SRA ~~INTERNATIONAL~~INTL INC CL A COMMON ~~758110100~~78464R105 $61,~~945~~396.4465 ~~157~~37,~~061~~017 SH DEFINED 01 ~~150~~36,~~574~~432 ~~123~~0 6585 ST. PAUL TRAVELERS CO COMMON 792860108 $34,~~364~~802.87 ~~SPDR~~828,120 TRSH ~~UNIT~~DEFINED ~~SER~~01 1748,867 449 78,804 SMITHFIELD FOODS COMMON ~~78462F103~~832248108 $42,~~433~~996.0334 36102,~~676~~098 SH DEFINED 01 36100,~~676~~447 0 1,651 SMURFIT-STONE CONTAIN COMMON 832727101 $2,959.81 218,114 SH DEFINED 01 214,550 0 3,564 SOUTHWEST AIRLS CO COMMON 844741108 $8225,~~538~~020.3275 51,~~589~~308,~~897~~845 SH DEFINED 01 41,~~983~~181,~~773~~367 ~~2,443~~725 ~~603~~126,~~681~~753 STAPLES INC COMMON 855030102 $65,~~454~~265.0684 ~~193~~206,~~791~~696 SH DEFINED 01 ~~185~~203,~~880~~375 ~~150~~0 73,~~761~~321 ~~SUNGARD~~TARGET ~~DATA~~CORP ~~SYS~~COM ~~INC~~ COMMON ~~867363103~~87612E106 $616,~~579~~201.6962 ~~237~~320,~~323~~208 SH DEFINED 01 ~~227~~293,~~577~~914 ~~185~~153 926,~~561~~141 ~~TELLABS~~US ~~INC~~BANCORP ~~COM~~DEL NEW CO COMMON ~~879664100~~902973304 $324,~~336~~477.4312 ~~388~~776,~~580~~731 SH DEFINED 01 ~~361~~704,~~475~~231 ~~515~~419 2672,~~590~~081 ~~TIME~~UNITED ~~WARNER~~PARCEL SVC INC COMMON ~~887317105~~911312106 $9817,~~393~~627.5544 5246,~~579,129~~490 SH DEFINED 01 4227,~~965~~396 110 18,~~550~~984 UNIVISION COMMUNICATI COMMON 914906102 $2,~~495~~948.12 ~~611~~85,~~084~~527 USSH ~~BANCORP~~DEFINED ~~DEL~~01 ~~NEW~~84,124 CO0 1,403 WASHINGTON MUT INC COMMON ~~902973304~~939322103 $~~107~~15,~~397~~808.3274 3368,~~775,424~~500 SH DEFINED 01 3336,~~360,538~~594 ~~1,687~~180 ~~413~~31,~~199~~726 ~~UNITED~~WILLIAMS ~~TECHNOLOGIES~~SONOMA INC C COMMON ~~913017109~~969904101 $~~272~~1,227.3359 228,~~635~~988 SH DEFINED 01 028,530 0 2458 WYETH COMMON 983024100 $21,~~635~~595.90 ~~VIACOM~~449,402 ~~INC~~SH ~~CLASS~~DEFINED B01 408,694 230 40,478 XEROX CORP COMMON ~~925524308~~984121103 $9134,~~044~~128.0044 2,~~746~~139,~~189~~735 SH DEFINED 01 21,~~441~~925,~~721~~680 1,~~225~~248 ~~303~~212,~~243~~807 ~~WILLIAMS~~ZIONS ~~SONOMA~~BANCORP ~~INC C~~ COMMON ~~969904101~~989701107 $42,~~017~~613.3595 ~~115~~31,~~156~~644 SH DEFINED 01 ~~109~~31,~~021~~136 750 ~~6,060~~508 ------------- -------------- ---------- ------ ---------------- TOTALS: $31,~~004~~583,~~364~~713.1828 8640,~~448~~031,~~322~~650 7736,~~240~~462,~~227~~828 3920,~~917~~124 93,~~168~~548,~~178~~698 ============= ============== ========== ====== ================

FORM 13F SUMMARY PAGE Number of Other Included Managers: 1 Form 13F Information Table Entry Total: 80 Form 13F Information Table Value Total: 1,583,713,280 List of Other Included Managers: Provide a numbered list of the name(s) and 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report. No. 13F File Number Name -------- --------------- ---------- 1 28-04975 Affiliated Managers Group, Inc.

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