Largest Nasdaq Short Interest Percent Increases as of April 30

The following are the 200 largest short interest percent increases on the Nasdaq Stock Market as of the April 30 settlement date. This list includes securities with a short position of at least 200,000 shares.



Ticker                                                                     
Symbol   Company                        April 30      April 15     % Change   
=============================================================================
ADNC     AUDIENCE INC                   649,740       259,340       150.5
SOXX     ISHARES PHLX SOX               749,561       340,453       120.2
AAPL     APPLE INC                   41,589,490    20,074,811       107.2
EZPW     EZCORP INC-A                 2,341,944     1,161,258       101.7
ACTG     ACACIA RESEARCH              2,989,409     1,620,568        84.5
CTCM     CTC MEDIA INC                  364,049       205,352        77.3
CHFN     CHARTER FINL                   376,168       216,609        73.7
DISH     DISH NETWORK-A               4,304,221     2,543,324        69.2
GOLD     RANDGOLD RES-ADR             1,362,149       805,246        69.2
AXDX     ACCELERATE DIAGN               545,272       327,708        66.4
INSM     INSMED INC                   1,345,499       838,494        60.5
PFMT     PERFORMANT FINAN             1,034,473       655,591        57.8
NDSN     NORDSON CORP                 1,331,273       851,516        56.3
MOLXA    MOLEX INC -A                   329,972       212,543        55.2
SIMO     SILICON MOTI-ADR             1,084,315       699,525        55.0
SYMX     SYNTHESIS ENERGY               432,325       278,955        55.0
FLEX     FLEXTRONICS INTL             8,204,851     5,380,283        52.5
AVEO     AVEO PHARMACEUTI             8,254,864     5,428,655        52.1
VLTR     VOLTERRA SEMICON               827,610       545,828        51.6
ECTY     ECOTALITY INC                  638,840       421,341        51.6
ARCP     AMERICAN REALTY              1,059,258       700,316        51.3
AMRI     ALBANY MOLECULAR               973,295       643,942        51.1
HDSN     HUDSON TECH                    505,529       335,536        50.7
RVBD     RIVERBED TECHNOL             8,105,882     5,393,506        50.3
FCFS     FIRST CASH FINL              1,471,770       984,425        49.5
SCON     SUPERCONDUCTOR T               300,699       202,821        48.3
CTXS     CITRIX SYSTEMS               3,485,769     2,373,751        46.8
SNPS     SYNOPSYS INC                 1,417,754       970,741        46.0
PNRA     PANERA BREAD-A               1,988,794     1,363,345        45.9
CPRX     CATALYST PHARMAC             3,500,809     2,405,056        45.6
BRKS     BROOKS AUTOMATIO             2,109,103     1,455,350        44.9
MENT     MENTOR GRAPHICS              2,938,482     2,029,426        44.8
DCIX     DIANA CONTAINERS             1,248,053       864,335        44.4
CKSW     CLICKSOFTWARE TE               387,578       269,340        43.9
IQNT     NEUTRAL TANDEM I             1,325,676       928,259        42.8
SVA      SINOVAC BIOTECH                618,587       434,262        42.4
OMER     OMEROS CORP                  5,239,997     3,710,721        41.2
GBDC     GOLUB CAPITAL BD             1,066,652       758,274        40.7
TECD     TECH DATA CORP               1,091,843       777,950        40.3
ROVI     ROVI CORP                    1,006,200       726,990        38.4
TINY     HARRIS & HARRIS                693,843       504,802        37.4
PMBC     PACIFIC MERCANTL               275,811       201,523        36.9
AFSI     AMTRUST FIN SERV             6,543,695     4,899,387        33.6
ACAD     ACADIA PHARMACEU             5,153,047     3,869,833        33.2
IPAR     INTER PARFUMS                  441,992       333,152        32.7
UCTT     ULTRA CLEAN HOLD               480,684       363,603        32.2
LAYN     LAYNE CHRISTENSN               786,034       595,579        32.0
ZINC     HORSEHEAD HOLDIN             4,634,425     3,513,961        31.9
MSG      MADISON SQUARE-A               520,616       395,909        31.5
KYTH     KYTHERA BIOPHARM               393,660       299,604        31.4
RDWR     RADWARE LTD                    909,606       695,185        30.8
SPNC     SPECTRANETICS                1,025,236       784,433        30.7
BCRX     BIOCRYST PHARM               6,603,174     5,056,193        30.6
RVLT     REVOLUTION LIGHT             1,241,958       951,892        30.5
MDAS     MEDASSETS INC                1,749,254     1,341,030        30.4
FLIR     FLIR SYSTEMS                 4,294,953     3,299,095        30.2
SCMP     SUCAMPO PHA-CL A               723,683       555,965        30.2
MKSI     MKS INSTRUMENTS              1,525,933     1,174,102        30.0
CBEY     CBEYOND INC                    742,863       572,053        29.9
VRNT     VERINT SYSTEMS                 950,266       732,545        29.7
AWRE     AWARE INC                      401,483       311,041        29.1
GRFS     GRIFOLS SA-ADR               1,137,853       883,569        28.8
STAN     STANDARD PARKING               731,883       570,408        28.3
SSNC     SS&C TECHNOLOGIE             1,276,904       996,259        28.2
GNTX     GENTEX CORP                  5,062,672     3,957,420        27.9
ERIC     ERICSSON LM-ADR              4,464,713     3,511,438        27.1
JBHT     HUNT (JB) TRANS              3,471,697     2,730,779        27.1
LPNT     LIFEPOINT HOSPIT             1,688,564     1,329,040        27.1
XNPT     XENOPORT INC                 2,619,832     2,063,176        27.0
CNDO     CORONADO BIOSCIE             1,732,993     1,365,290        26.9
MFLX     MULTI-FINELINE E               305,985       241,321        26.8
ARRY     ARRAY BIOPHARMA              5,278,025     4,164,275        26.7
VICR     VICOR CORP                     423,855       334,498        26.7
NFLX     NETFLIX INC                 10,371,036     8,185,777        26.7
RGLS     REGULUS THERAPEU               460,367       363,587        26.6
BODY     BODY CENTRAL COR               742,233       586,856        26.5
DENN     DENNY'S CORP                 2,605,451     2,066,002        26.1
EXAS     EXACT SCIENCES               8,578,947     6,825,724        25.7
ZNGA     ZYNGA INC- CL A             33,435,127    26,649,539        25.5
TSCO     TRACTOR SUPPLY               2,202,377     1,763,556        24.9
LMIA     LMI AEROSPACE                  344,779       276,372        24.8
RGEN     REPLIGEN CORP                3,324,779     2,665,766        24.7
CBLI     CLEVELAND BIOLAB             2,097,842     1,683,025        24.6
INFA     INFORMATICA CORP             3,720,996     2,990,956        24.4
PTX      PERNIX THERAPEUT               457,363       369,232        23.9
GIFI     GULF ISLAND FABR               287,165       232,094        23.7
SUBK     SUFFOLK BANCORP                249,172       201,528        23.6
HLIT     HARMONIC INC                 2,284,856     1,850,629        23.5
NGPC     NGP CAP RES CO                 573,361       465,890        23.1
BKMU     BANK MUTUAL CORP               789,672       643,151        22.8
TROV     TROVAGENE INC                  306,770       249,891        22.8
MSPD     MINDSPEED TECHNO             4,830,689     3,937,566        22.7
JJSF     J & J SNACK FOOD               250,114       203,875        22.7
MNTG     MTR GAMING GROUP               590,673       481,496        22.7
NTLS     NTELOS HOLDINGS                944,462       769,919        22.7
PLXT     PLX TECHNOLOGY               1,138,488       928,147        22.7
TRS      TRIMAS CORP                    622,762       507,732        22.7
NTES     NETEASE INC-ADR              1,278,150     1,042,268        22.6
FIBK     FIRST INTER/MT                 287,043       234,492        22.4
TICC     TICC CAPITAL COR             2,046,074     1,674,864        22.2
PCCC     PC CONNECTION                  333,689       273,198        22.1
SCSC     SCANSOURCE INC                 657,064       538,109        22.1
SHFL     SHFL ENTERTAINME             1,155,834       948,109        21.9
ESRX     EXPRESS SCRIPTS             12,596,259    10,340,202        21.8
STSA     STERLING FINL/WA               975,680       800,984        21.8
AREX     APPROACH RESOURC             7,583,075     6,241,159        21.5
HSON     HUDSON GLOBAL IN               686,040       564,837        21.5
SUPN     SUPERNUS PHARMAC             4,260,766     3,510,417        21.4
ACHC     ACADIA HEALTHCAR             3,648,268     3,008,602        21.3
VICL     VICAL INC                    7,455,110     6,150,699        21.2
VNR      VANGUARD NATURAL               787,797       650,034        21.2
WRES     WARREN RESOURCES             1,289,169     1,064,388        21.1
LIOX     LIONBRIDGE TECH              1,013,499       837,391        21.0
PAAS     PAN AMER SILVER              4,160,824     3,441,390        20.9
PDFS     PDF SOLUTIONS                  481,844       398,938        20.8
GAME     SHANDA GAMES-ADR               356,039       295,097        20.7
NXST     NEXSTAR BROADC-A               389,270       322,799        20.6
LPLA     LPL FINANCIAL HO             1,739,780     1,442,820        20.6
ADSK     AUTODESK INC                 3,810,389     3,160,340        20.6
BCPC     BALCHEM CORP                   523,023       433,898        20.5
NANO     NANOMETRICS INC                871,129       723,347        20.4
PEBO     PEOPLES BANC INC               324,447       269,552        20.4
VRTX     VERTEX PHARM                 5,643,615     4,696,892        20.2
SCVL     SHOE CARNIVAL                  438,189       365,308        20.0
ROCK     GIBRALTAR INDUST               812,005       677,073        19.9
ROCM     ROCHESTER MEDICA               248,970       207,691        19.9
HCSG     HEALTHCARE SERVS             6,434,269     5,369,192        19.8
GALT     GALECTIN THERAPE               334,198       278,907        19.8
HEES     H&E EQUIPMENT SE             1,067,689       891,149        19.8
NWSA     NEWS CORP-A                 48,488,208    40,490,393        19.8
MTSN     MATTSON TECH                 1,759,502     1,470,436        19.7
ALOG     ANALOGIC CORP                  589,764       493,201        19.6
POZN     POZEN INC                    2,032,085     1,699,902        19.5
IBKR     INTERACTIVE BROK               718,495       603,019        19.1
SONC     SONIC CORP                   3,452,223     2,899,233        19.1
HBIO     HARVARD BIOSCIEN               749,495       629,869        19.0
YRCW     YRC WORLDWIDE IN             1,023,452       860,322        19.0
PAMT     PARAMETRIC SOUND             1,514,692     1,275,484        18.8
FFNW     FIRST FINANCIAL                287,838       242,668        18.6
AXTI     AXT INC                        971,188       819,620        18.5
FWRD     FORWARD AIR CORP               775,002       654,570        18.4
ATMI     ATMI INC                       576,957       487,535        18.3
AMSG     AMSURG CORP                    710,174       600,844        18.2
SLTM     SOLTA MEDICAL IN             1,574,494     1,332,480        18.2
RSYS     RADISYS CORP                 1,000,183       848,602        17.9
EGLE     EAGLE BULK SHIPP             2,341,213     1,987,506        17.8
IRWD     IRONWOOD PHARMAC            16,540,312    14,043,052        17.8
ASCMA    ASCENT CAPITAL-A               299,403       254,962        17.4
PACB     PACIFIC BIOSCIEN             3,201,329     2,726,286        17.4
ESBF     ESB FINANCIAL                  435,302       370,900        17.4
LLTC     LINEAR TECH CORP             6,467,476     5,511,997        17.3
FALC     FALCONSTOR SOFTW               633,931       540,420        17.3
LGND     LIGAND PHARM-B               1,887,102     1,608,748        17.3
AEZS     AETERNA ZENTARIS             1,195,828     1,021,125        17.1
HGSH     CHINA HGS REAL E               248,792       212,513        17.1
GSIG     GSI GROUP INC                  574,929       491,299        17.0
ARIA     ARIAD PHARM                 12,735,768    10,884,174        17.0
SPAR     SPARTAN MOTORS                 656,384       561,259        16.9
SPRD     SPREADTRUM-ADR               2,473,450     2,115,267        16.9
SAIA     SAIA INC                       315,934       270,381        16.8
ELOS     SYNERON MEDICAL                422,642       361,783        16.8
QLGC     QLOGIC CORP                  2,946,665     2,523,199        16.8
WSBC     WESBANCO INC                   420,892       360,480        16.8
PCTI     PC-TEL INC                     295,038       252,715        16.7
FDUS     FIDUS INVESTMENT               597,012       511,810        16.6
POWR     POWERSECURE INTE               436,462       374,219        16.6
AMAG     AMAG PHARMACEUTI               882,209       756,429        16.6
CTSH     COGNIZANT TECH-A             2,951,705     2,531,869        16.6
CYTK     CYTOKINETICS INC             1,314,674     1,127,760        16.6
CCRN     CROSS COUNTRY HE               465,036       398,988        16.6
RBCN     RUBICON TECHNOLO             4,847,714     4,161,674        16.5
UPIP     UNWIRED PLANET I             2,076,745     1,783,254        16.5
AGEN     AGENUS INC                   1,343,896     1,154,106        16.4
COHU     COHU INC                       481,185       413,498        16.4
ATSG     AIR TRANSPORT SE             1,151,214       989,891        16.3
INOD     INNODATA INC                   555,795       477,959        16.3
WFM      WHOLE FOODS MKT              4,128,230     3,550,648        16.3
OFIX     ORTHOFIX INTL                  411,648       354,337        16.2
PPC      PILGRIM'S PRIDE              3,076,627     2,648,360        16.2
AMWD     AMER WOODMARK CO               576,339       496,878        16.0
ASTX     ASTEX PHARMACEUT             5,839,281     5,035,242        16.0
PCBK     PAC CONTL CORP                 249,365       215,216        15.9
GOOG     GOOGLE INC-CL A              4,124,954     3,560,211        15.9
RDI      READING INTL-A                 267,037       230,640        15.8
SPIL     SILICONWARE-ADR              3,899,819     3,370,066        15.7
AMSWA    AMER SOFTWARE-A                436,406       377,525        15.6
OSIS     OSI SYSTEMS INC                866,717       751,030        15.4
MYRG     MYR GROUP INC/DE               359,632       311,725        15.4
HALL     HALLMARK FINL                  241,793       209,607        15.4
WHF      WHITEHORSE FINAN               295,931       256,602        15.3
RNET     RIGNET INC                     230,570       200,072        15.2
HMIN     HOME INNS & -ADR               773,496       671,534        15.2
TLAB     TELLABS INC                  9,696,767     8,420,356        15.2
GALE     GALENA BIOPHARMA            11,624,548    10,099,283        15.1
CGEN     COMPUGEN LTD                   899,972       782,606        15.0
FIVE     FIVE BELOW                   3,860,401     3,358,811        14.9
AAXJ     ISHAR ASIA EX-JP               805,524       701,054        14.9
GEOS     GEOSPACE TECHNOL               737,030       641,625        14.9
DGII     DIGI INTL INC                  541,157       471,135        14.9
MGIC     MAGIC SOFTWARE                 297,615       259,135        14.8

*-- Data includes ETF positions.

-- Bloomberg News

To contact Bloomberg News for this story: newsdev@bloomberg.net

Press spacebar to pause and continue. Press esc to stop.

Bloomberg reserves the right to remove comments but is under no obligation to do so, or to explain individual moderation decisions.

Please enable JavaScript to view the comments powered by Disqus.