Largest Nasdaq Short Interest Percent Increases as of April 29

The following are the 200 largest short interest percent increases on the Nasdaq Stock Market as of the April 29 settlement date. This list includes securities with a short position of at least 200,000 shares.



Ticker                                                                     
Symbol   Company                        April 29      April 15     % Change   
=============================================================================
ISTA     ISTA PHARMACEUTI             1,552,257       451,986       243.4
SLGN     SILGAN HOLDINGS              3,393,546     1,299,289       161.2
COGO     COGO GROUP INC                 543,554       233,367       132.9
DISCK    DISCOVERY COMM-C             1,451,043       623,083       132.9
ADAT     AUTHENTIDATE HLD             1,563,966       712,049       119.6
ACAD     ACADIA PHARMACEU               440,386       209,160       110.5
EXFO     EXFO INC                       511,473       260,126        96.6
MICC     MILLICOM INTL                1,166,082       620,763        87.8
TRGL     TOREADOR RES                 1,265,080       692,247        82.7
VELT     VELTI PLC                      765,762       431,604        77.4
ETFC     E*TRADE FINANCIA             6,160,857     3,587,553        71.7
FMAR     FIRST MARINER                  400,241       246,773        62.2
TXCC     TRANSWITCH CORP              1,087,491       675,689        60.9
SCEI     SINO CLEAN ENERG             1,223,521       762,210        60.5
CYOU     CHANGYOU.COM-ADR             1,130,372       709,660        59.3
AKAM     AKAMAI TECHNOLOG             8,710,784     5,519,258        57.8
PWRD     PERFECT WORL-ADR             1,001,854       638,835        56.8
AMRN     AMARIN CORP -ADR             4,313,665     2,763,544        56.1
OCZ      OCZ TECHNOLOGY               8,653,384     5,575,556        55.2
SNBC     SUN BANCORP-NJ                 485,223       313,735        54.7
INFY     INFOSYS TECH-ADR             7,332,020     4,776,090        53.5
ACOM     ANCESTRY.COM INC             6,444,941     4,245,319        51.8
BRKL     BROOKLINE BANCRP             3,756,397     2,503,880        50.0
CHINA    CDC CORP-CL A                1,723,575     1,176,663        46.5
RGLD     ROYAL GOLD INC               2,866,697     1,983,913        44.5
ONSM     ONSTREAM MEDIA C               288,566       200,761        43.7
DNBK     DANVERS BANCORP                852,294       593,393        43.6
NTES     NETEASE.COM-ADR              2,695,991     1,882,338        43.2
ABFS     ARKANSAS BEST                1,289,986       905,328        42.5
TSON     TRANS1 INC                     993,598       697,738        42.4
KOOL     THERMOGENESIS                  324,236       227,931        42.3
ASIA     ASIAINFO-LINKAGE             4,831,325     3,397,372        42.2
SYMC     SYMANTEC CORP                8,916,235     6,288,975        41.8
UTIW     UTI WORLDWIDE                  881,292       622,205        41.6
TDSC     3D SYSTEMS CORP              2,189,125     1,551,438        41.1
SODA     SODASTREAM INTER             3,360,582     2,386,597        40.8
SWSH     SWISHER HYGIENE              7,367,833     5,307,430        38.8
SBCF     SEACOAST BANK/FL             1,203,186       875,758        37.4
CPWR     COMPUWARE CORP               4,097,147     2,983,670        37.3
TWTC     TW TELECOM INC               7,237,366     5,325,497        35.9
JRJC     CHINA FINANC-ADR               279,525       205,713        35.9
HBAN     HUNTINGTON BANC             32,739,459    24,114,444        35.8
SIFY     SIFY TECHNOL-ADR             1,976,257     1,455,936        35.7
UFPI     UNIVERSAL FOREST             1,264,657       936,505        35.0
LPSN     LIVEPERSON INC               4,088,900     3,032,084        34.9
UEIC     UNIVERSAL ELEC                 666,072       496,430        34.2
IBKR     INTERACTIVE BROK             1,310,804       979,941        33.8
MSG      MADISON SQUARE-A             1,063,058       795,093        33.7
REDF     REDIFF.COM I-ADR             1,314,133       986,786        33.2
ACXM     ACXIOM CORP                  2,908,916     2,189,674        32.8
VRSN     VERISIGN INC                 7,755,239     5,844,627        32.7
MPWR     MONOLITHIC POWER             1,842,235     1,391,990        32.3
ZOOM     ZOOM TECHNOLOGIE               669,155       506,323        32.2
CRDN     CERADYNE INC                 1,198,850       907,493        32.1
VALV     SHENGKAI INNOVAT               617,440       468,319        31.8
ATML     ATMEL CORP                  16,202,518    12,310,205        31.6
BEBE     BEBE STORES INC              1,783,457     1,360,114        31.1
BBBY     BED BATH &BEYOND             6,924,421     5,284,300        31.0
CCIH     CHINACACHE-ADR                 998,237       766,948        30.2
BSFT     BROADSOFT INC                1,058,281       815,294        29.8
ASYS     AMTECH SYS INC                 990,458       769,466        28.7
ELMG     EMS TECHNOLOGIES               477,891       371,698        28.6
ALIM     ALIMERA SCIENCES               838,199       661,635        26.7
COOL     MAJESCO ENTERTAI             2,244,261     1,773,178        26.6
PRMW     PRIMO WATER CORP               902,089       713,097        26.5
BCSI     BLUE COAT SYSTEM             2,672,470     2,117,371        26.2
KSWS     K-SWISS INC-A                3,793,544     3,010,614        26.0
ININ     INTERACTIVE INT                573,458       455,599        25.9
CCIX     COLEMAN CABLE IN               389,653       309,676        25.8
URBN     URBAN OUTFITTER             15,855,622    12,628,506        25.6
TLCR     TALECRIS BIOTHER             1,664,443     1,326,822        25.4
AVEO     AVEO PHARMACEUTI               437,936       349,527        25.3
HNSN     HANSEN MEDICAL I             6,279,144     5,015,597        25.2
EROC     EAGLE ROCK ENERG               766,790       612,722        25.1
INSU     INSITUFORM TECH              4,164,663     3,330,449        25.0
EPOC     EPOCRATES INC                1,412,209     1,134,066        24.5
NXTM     NXSTAGE MEDICAL              3,374,682     2,712,748        24.4
CTFO     CHINA TRANSINFO                278,332       224,247        24.1
FURX     FURIEX PHARMACEU               438,427       353,659        24.0
IPGP     IPG PHOTONICS                1,146,975       926,706        23.8
JBHT     HUNT (JB) TRANS              2,656,598     2,150,302        23.5
AMTD     TD AMERITRADE HO            15,608,751    12,641,097        23.5
IART     INTEGRA LIFESCIE               829,351       671,675        23.5
COMV     COMVERGE INC                 1,787,482     1,451,516        23.1
ABMD     ABIOMED INC                  2,124,295     1,725,382        23.1
RELL     RICHARDSON ELEC                575,565       467,968        23.0
CWTR     COLDWATER CREEK              3,880,554     3,165,487        22.6
HOTT     HOT TOPIC INC                2,178,298     1,779,265        22.4
CHKP     CHECK POINT SOFT             3,788,387     3,116,511        21.6
CRUS     CIRRUS LOGIC INC             4,640,241     3,822,806        21.4
BBRG     BRAVO BRIO RESTA               460,713       379,626        21.4
INFN     INFINERA CORP                7,017,246     5,789,751        21.2
HFWA     HERITAGE FINL                  571,502       472,075        21.1
ARMH     ARM HOLDINGS-ADR            10,875,337     8,986,545        21.0
VRA      VERA BRADLEY INC             2,804,343     2,317,928        21.0
MSCC     MICROSEMI CORP               3,521,177     2,911,195        21.0
TITN     TITAN MACHINERY              1,839,461     1,524,659        20.6
ARII     AMERICAN RAILCAR               444,441       368,427        20.6
GIGM     GIGAMEDIA LTD                  806,187       668,684        20.6
MMSI     MERIT MEDICAL                1,167,980       970,589        20.3
SUTR     SUTOR TECHNOLOG                265,825       221,241        20.2
UDRL     UNION DRILLING                 572,488       476,918        20.0
GOLD     RANDGOLD RES-ADR               877,706       731,394        20.0
ORCL     ORACLE CORP                 29,805,558    24,838,895        20.0
KNOL     KNOLOGY INC                  1,061,271       885,979        19.8
APOG     APOGEE ENTERPR               1,075,715       898,145        19.8
SGMS     SCIENTIFIC GAM-A             3,798,161     3,172,032        19.7
AGNC     AMERICAN CAPITAL             7,272,381     6,081,619        19.6
ZBRA     ZEBRA TECH CORP                530,574       444,950        19.2
HSIC     HENRY SCHEIN INC             3,097,046     2,597,470        19.2
LINTA    LIBERTY-INTER A              4,747,750     3,990,556        19.0
LSCC     LATTICE SEMICOND             4,790,612     4,031,401        18.8
HSFT     HISOFT TECHN-ADR             1,218,949     1,032,031        18.1
RPRX     REPROS THERAPEUT               798,887       676,496        18.1
CLMS     CALAMOS ASSET-A                561,178       475,455        18.0
SYNT     SYNTEL INC                     792,237       671,458        18.0
HANS     HANSEN NATURAL               1,338,197     1,134,477        18.0
BDSI     BIODELIVERY SCIE               633,930       537,625        17.9
LEDS     SEMILEDS CORP/TW               517,847       439,755        17.8
XING     QIAO XING UNIVER             1,634,445     1,388,314        17.7
RUE      RUE21 INC                    4,694,262     3,988,794        17.7
RSTI     ROFIN-SINAR TECH               854,132       726,175        17.6
CBST     CUBIST PHARM                 7,418,853     6,311,799        17.5
TLAB     TELLABS INC                 18,304,734    15,626,801        17.1
BIDU     BAIDU INC-SP ADR             5,893,292     5,036,649        17.0
GOOG     GOOGLE INC-CL A              3,969,702     3,392,723        17.0
DBLE     DOUBLE EAGLE PET               328,095       280,898        16.8
IIVI     II-VI INC                      858,881       735,420        16.8
EDAP     EDAP TMS SA -ADR               248,530       212,880        16.7
SLRC     SOLAR CAPITAL LT               374,228       320,641        16.7
MNRO     MONRO MUFFLER                3,924,924     3,376,487        16.2
QCOM     QUALCOMM INC                21,990,403    18,932,650        16.2
SMCI     SUPER MICRO COMP             1,127,104       970,919        16.1
IMKTA    INGLES MARKETS-A               279,322       240,617        16.1
DTSI     DTS INC                      1,241,196     1,069,589        16.0
VRSK     VERISK ANALYTI-A               597,271       514,990        16.0
WIBC     WILSHIRE BANCORP             2,655,527     2,291,708        15.9
PSTI     PLURISTEM THERAP               444,139       383,291        15.9
BLTI     BIOLASE TECHNOLO             2,862,245     2,470,325        15.9
BWLD     BUFFALO WILD WIN             1,992,858     1,722,602        15.7
AAPL     APPLE INC                   13,349,219    11,546,774        15.6
GIFI     GULF ISLAND FABR               386,716       334,916        15.5
TRS      TRIMAS CORP                    566,913       491,106        15.4
SCMR     SYCAMORE NETWORK             1,294,471     1,122,879        15.3
IRBT     IROBOT CORP                  1,775,545     1,540,228        15.3
LNCR     LINCARE HOLDINGS             9,749,879     8,464,699        15.2
SKYW     SKYWEST INC                  1,707,145     1,482,636        15.1
ROIAK    RADIO ONE-CL D               2,722,186     2,366,144        15.0
GCOM     GLOBECOMM SYS                  698,548       607,239        15.0
MANT     MANTECH INTL-A               1,560,504     1,356,716        15.0
INTC     INTEL CORP                  82,244,286    71,546,703        15.0
WFSL     WASH FED                     4,098,284     3,565,927        14.9
HOFT     HOOKER FURNITURE               363,426       316,224        14.9
CMLS     CUMULUS MEDIA-A              4,812,971     4,189,217        14.9
RTEC     RUDOLPH TECHNOL              1,226,056     1,067,208        14.9
RIMM     RESEARCH IN MOTI            31,339,538    27,283,545        14.9
NTLS     NTELOS HOLDINGS                791,229       688,831        14.9
EXPD     EXPEDITORS INTL              3,557,913     3,099,949        14.8
USMO     USA MOBILITY INC             1,356,571     1,182,962        14.7
ULTR     ULTRAPETROL                    993,745       866,582        14.7
ELGX     ENDOLOGIX INC                2,222,300     1,939,214        14.6
OVRL     OVERLAND STORAGE               245,078       213,938        14.6
IDSA     INDUS SVCS AMER                325,037       283,829        14.5
PLFE     PRESIDENTIAL LIF               505,118       441,161        14.5
SLAB     SILICON LABS                 3,914,338     3,420,168        14.4
IPAR     INTER PARFUMS                  406,477       355,534        14.3
ISIL     INTERSIL CORP-A              9,998,043     8,750,681        14.3
ABCB     AMERIS BANCORP               1,293,379     1,132,142        14.2
GFRE     GULF RESOURCES I             4,898,221     4,288,104        14.2
HSII     HEIDRICK & STRUG               646,433       566,037        14.2
VLTR     VOLTERRA SEMICON             1,232,266     1,079,814        14.1
ARUN     ARUBA NETWORKS I            11,467,857    10,049,794        14.1
LQDT     LIQUIDITY SERVIC               686,747       601,832        14.1
DXPE     DXP ENTERPRISES                303,442       266,291        14.0
OFIX     ORTHOFIX INTL                  787,238       691,042        13.9
DRIV     DIGITAL RIVER                4,463,513     3,920,681        13.8
PLCM     POLYCOM INC                  2,324,541     2,041,869        13.8
AMRI     ALBANY MOLECULAR               990,978       872,827        13.5
KONG     KONGZHONG-ADR                  467,810       412,203        13.5
HOMB     HOME BANCSHARES                923,076       813,923        13.4
SABA     SABA SOFTWARE                1,033,522       911,866        13.3
TTMI     TTM TECHNOLOGIES             4,784,100     4,222,415        13.3
FMCN     FOCUS MEDIA-ADR              6,080,212     5,366,641        13.3
INAP     INTERNAP NETWORK             1,623,502     1,433,574        13.2
HERO     HERCULES OFFSHOR            12,956,385    11,447,009        13.2
HTGC     HERCULES TECHNOL             1,825,549     1,613,206        13.2
MCRI     MONARCH CASINO                 285,046       251,957        13.1
TRMB     TRIMBLE NAVIG                2,091,997     1,849,370        13.1
HEAT     SMARTHEAT INC                2,220,470     1,963,052        13.1
ISIG     INSIGNIA SYSTEMS               269,253       238,316        13.0
ECOL     US ECOLOGY INC                 563,598       499,121        12.9
TECUA    TECUMSEH PROD-A                471,624       417,975        12.8
MXIM     MAXIM INTEGRATED             6,196,665     5,494,193        12.8
ZLCS     ZALICUS INC                  3,432,571     3,043,623        12.8
MERU     MERU NETWORKS IN             3,409,745     3,025,244        12.7
ECPG     ENCORE CAPITAL G               438,536       389,092        12.7
MCGC     MCG CAPITAL CORP             2,934,719     2,604,841        12.7
CPWM     COST PLUS INC/CA             2,025,605     1,798,116        12.7
CRAI     CRA INTERNATIONA               263,435       233,857        12.6
MSW      MISSION WEST PRO               624,168       554,348        12.6

*-- Data includes ETF positions.

-- Bloomberg News To contact Bloomberg News for this story: +1-212-318-2000 or newsdev@bloomberg.net

-0- May/11/2011 15:46 GMT

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