ARTHROCARE CORP - 043136100

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2014 · Compare: Q4 2013
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
JPMORGAN CHASE & CO History Added to 6,431,394 309,929 0.09% 0.0% 1 +6,342,123 7104.35% Q1 2014 May 15, 2014
FMR LLC History Added to 3,160,660 152,312 0.02% 0.0% 2 +2,990,660 1759.21% Q1 2014 May 15, 2014
WESTFIELD CAPITAL MANAGEMENT CO LP History Reduced 2,441,259 117,644 0.7% 0.75% 3 -734,228 -23.12% Q1 2014 May 12, 2014
PAULSON & CO INC History New 2,000,000 96,380 0.47% 4 +2,000,000 New Q1 2014 May 15, 2014
WATER ISLAND CAPITAL LLC History New 1,893,366 91,241 3.24% 5 +1,893,366 New Q1 2014 May 14, 2014
VANGUARD GROUP INC History Reduced 1,537,058 74,071 0.01% 0.01% 6 -160,866 -9.47% Q1 2014 May 13, 2014
RENAISSANCE TECHNOLOGIES LLC History Added to 1,161,901 55,992 0.13% 0.08% 7 +372,501 47.19% Q1 2014 May 14, 2014
BlackRock Institutional Trust Company, N.A. History Added to 878,809 42,350 0.01% 0.01% 8 +78,503 9.81% Q1 2014 May 02, 2014
BlackRock Fund Advisors History Added to 773,026 37,252 0.01% 0.01% 9 +23,012 3.07% Q1 2014 May 02, 2014
STATE STREET CORP History Added to 691,981 33,347 0.0% 0.0% 10 +139,578 25.27% Q1 2014 May 15, 2014
DIMENSIONAL FUND ADVISORS LP History Added to 624,311 30,086 0.02% 0.02% 11 +9,671 1.57% Q1 2014 May 14, 2014
GABELLI FUNDS LLC History Added to 586,813 28,279 0.15% 0.05% 12 +361,813 160.81% Q1 2014 May 16, 2014
CREDIT SUISSE AG/ History Added to 577,079 27,810 0.03% 0.0% 13 +510,189 762.73% Q1 2014 May 15, 2014
CITADEL ADVISORS LLC History Added to 528,209 25,454 36.66% 1.94% 14 +500,511 1807.03% Q1 2014 Aug 08, 2014
GAMCO INVESTORS, INC. ET AL History Added to 465,656 22,440 0.12% 0.07% 15 +140,356 43.15% Q1 2014 May 16, 2014
ALPINE ASSOCIATES ADVISORS History New 418,800 20,182 1.26% 16 +418,800 New Q1 2014 May 09, 2014
MORGAN STANLEY History Added to 403,481 19,443 0.01% 0.0% 17 +335,812 496.26% Q1 2014 May 13, 2014
NORTHERN TRUST CORP History Reduced 376,961 18,165 0.01% 0.01% 18 -34,179 -8.31% Q1 2014 May 14, 2014
BARCLAYS PLC History Added to 358,784 17,222 0.02% 0.0% 19 +332,823 1282.01% Q1 2014 May 15, 2014
Her Majesty the Queen in Right of the Province of Alberta as represented by Alberta Investment Management Corp History No change 339,076 16,340 0.2% 0.17% 20 0 0.0% Q1 2014 Apr 22, 2014
KENNEDY CAPITAL MANAGEMENT, INC. History Reduced 335,842 16,184 0.3% 0.25% 21 -6,744 -1.97% Q1 2014 May 14, 2014
GABELLI SECURITIES, INC. History New 331,733 15,986 4.35% 22 +331,733 New Q1 2014 May 16, 2014
AQR CAPITAL MANAGEMENT LLC History Added to 324,705 15,648 0.05% 0.02% 23 +195,505 151.32% Q1 2014 May 15, 2014
AMERICAN CAPITAL MANAGEMENT INC History Reduced 310,975 14,986 1.77% 1.58% 24 -6,000 -1.89% Q1 2014 Apr 14, 2014
OMERS ADMINISTRATION Corp History New 274,476 13,227 0.43% 25 +274,476 New Q1 2014 May 08, 2014
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS History New 259,067 12,484 0.19% 26 +259,067 New Q1 2014 May 08, 2014
Cheyne Capital Management (UK) LLP History New 257,107 12,390 11.88% 27 +257,107 New Q1 2014 May 14, 2014
TIVERTON ASSET MANAGEMENT LLC History No change 200,000 9,641 0.21% 0.18% 28 0 0.0% Q1 2014 May 07, 2014
MILLENNIUM MANAGEMENT LLC History Reduced 199,958 9,636 0.03% 0.03% 29 -35,225 -14.98% Q1 2014 May 15, 2014
TIAA CREF INVESTMENT MANAGEMENT LLC History Added to 188,675 9,092 0.01% 0.01% 30 +6,083 3.33% Q1 2014 May 13, 2014
HANCOCK HOLDING CO History Reduced 171,400 8,260 0.32% 0.28% 31 -520 -0.3% Q1 2014 May 15, 2014
Breithorn Capital Management History Reduced 160,910 7,754 4.12% 3.71% 32 -3,550 -2.16% Q1 2014 May 15, 2014
GEODE CAPITAL MANAGEMENT, LLC History Reduced 160,044 7,712 0.01% 0.0% 33 -3,362 -2.06% Q1 2014 May 14, 2014
Loeb Offshore Management LP History New 151,328 7,292 2.09% 34 +151,328 New Q1 2014 May 15, 2014
Bank of New York Mellon Corp History Reduced 146,549 7,062 0.0% 0.0% 35 -32,968 -18.36% Q1 2014 May 14, 2014
CREDIT AGRICOLE S A History New 140,977 6,794 0.03% 36 +140,977 New Q1 2014 May 12, 2014
DEUTSCHE BANK AG\ History Added to 136,504 6,577 0.0% 0.0% 37 +89,199 188.56% Q1 2014 May 15, 2014
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Added to 120,562 5,810 0.0% 0.0% 38 +62,568 107.89% Q1 2014 May 14, 2014
BlackRock Investment Management, LLC History Reduced 110,528 5,326 0.01% 0.01% 39 -2,116 -1.88% Q1 2014 May 02, 2014
Verition Fund Management LLC History New 100,067 4,822 0.73% 40 +100,067 New Q1 2014 May 14, 2014
D. E. Shaw & Co., Inc. History Reduced 99,254 4,783 0.01% 0.01% 41 -8,195 -7.63% Q1 2014 May 15, 2014
AXA History Reduced 95,730 4,613 0.02% 0.02% 42 -14,354 -13.04% Q1 2014 May 13, 2014
TFS CAPITAL LLC History Reduced 95,589 4,606 0.3% 0.33% 43 -79,441 -45.39% Q1 2014 May 05, 2014
EII CAPITAL MANAGEMENT, INC. History Reduced 90,500 4,361 0.09% 0.09% 44 -1,900 -2.06% Q1 2014 May 14, 2014
TWO SIGMA INVESTMENTS LLC History Reduced 81,621 3,934 0.02% 0.02% 45 -26,670 -24.63% Q1 2014 May 15, 2014
SCHWAB CHARLES INVESTMENT MANAGEMENT INC History Reduced 76,078 3,667 0.01% 0.01% 46 -56,263 -42.51% Q1 2014 Apr 29, 2014
TWO SIGMA ADVISERS, LLC History Reduced 74,800 3,605 0.03% 0.04% 47 -29,493 -28.28% Q1 2014 May 15, 2014
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM History Added to 72,900 3,509 0.01% 0.0% 48 +6,100 9.13% Q1 2014 Apr 18, 2014
AMERIPRISE FINANCIAL INC History New 69,445 3,346 0.0% 49 +69,445 New Q1 2014 May 14, 2014
PARAMETRIC PORTFOLIO ASSOCIATES LLC History Added to 63,268 3,049 0.01% 0.01% 50 +5,710 9.92% Q1 2014 May 13, 2014
Visium Asset Management, LP History Reduced 62,279 3,003 0.05% 0.47% 51 -537,721 -89.62% Q1 2014 May 15, 2014
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM History Added to 51,276 2,471 0.01% 0.01% 52 +200 0.39% Q1 2014 May 08, 2014
ALLIANCEBERNSTEIN L.P. History Reduced 50,460 2,432 0.0% 0.0% 53 -1,669 -3.2% Q1 2014 May 13, 2014
Lombard Odier Asset Management (USA) Corp History New 50,000 2,410 0.09% 54 +50,000 New Q1 2014 May 15, 2014
Realm Partners LLC History New 48,482 2,336 1.34% 55 +48,482 New Q1 2014 May 13, 2014
TEACHERS ADVISORS INC History Reduced 42,612 2,053 0.0% 0.02% 56 -169,567 -79.92% Q1 2014 May 13, 2014
HAVENS ADVISORS LLC History New 42,000 2,038 2.08% 57 +42,000 New Q1 2014 May 08, 2014
GOLDMAN SACHS GROUP INC History Reduced 38,474 1,854 0.0% 0.0% 58 -19,059 -33.13% Q1 2014 May 15, 2014
PEAK6 Investments, L.P. History New 37,600 1,812 0.02% 59 +37,600 New Q1 2014 May 19, 2014
STATE OF WISCONSIN INVESTMENT BOARD History New 35,000 1,687 0.01% 60 +35,000 New Q1 2014 May 14, 2014
GARDNER LEWIS ASSET MANAGEMENT L P History New 34,845 1,679 0.53% 61 +34,845 New Q1 2014 May 14, 2014
CITIGROUP INC History Added to 34,352 1,656 0.0% 0.0% 62 +25,215 275.97% Q1 2014 May 15, 2014
RHUMBLINE ADVISERS History Added to 31,807 1,533 0.0% 0.0% 63 +1,790 5.96% Q1 2014 May 06, 2014
Swiss National Bank History Added to 30,100 1,451 0.01% 0.0% 64 +7,300 32.02% Q1 2014 May 06, 2014
PANAGORA ASSET MANAGEMENT INC History No change 29,639 1,428 0.01% 0.01% 65 0 0.0% Q1 2014 May 15, 2014
BlackRock Group LTD History Added to 29,019 1,398 0.0% 0.0% 66 +2,089 7.76% Q1 2014 May 02, 2014
ProShare Advisors LLC History New 28,540 1,375 0.02% 67 +28,540 New Q1 2014 May 07, 2014
SUNRISE PARTNERS LIMITED PARTNERSHIP /CT History New 27,490 1,325 0.09% 68 +27,490 New Q1 2014 May 15, 2014
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM History No change 24,329 1,172 0.0% 0.0% 69 0 0.0% Q1 2014 Apr 24, 2014
METROPOLITAN LIFE INSURANCE CO/NY History No change 22,912 1,104 0.01% 0.01% 70 0 0.0% Q1 2014 May 05, 2014
STRS OHIO History Reduced 22,500 1,084 0.0% 0.0% 71 -4,000 -15.09% Q1 2014 Apr 28, 2014
MANUFACTURERS LIFE INSURANCE COMPANY, THE History Reduced 21,216 1,022 0.0% 0.0% 72 -128 -0.6% Q1 2014 May 15, 2014
BANK OF AMERICA CORP /DE/ History Added to 20,510 989 0.0% 9.55% 73 +4,772 30.32% Q1 2014 May 15, 2014
AMERICAN CENTURY COMPANIES INC History Reduced 20,069 967 0.0% 0.0% 74 -1,600 -7.38% Q1 2014 May 05, 2014
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO History New 20,000 964 0.01% 75 +20,000 New Q1 2014 May 15, 2014
HARVEST MANAGEMENT LLC History New 20,000 964 1.65% 76 +20,000 New Q1 2014 May 12, 2014
ING INVESTMENT MANAGEMENT LLC History No change 19,500 940 0.0% 0.0% 77 0 0.0% Q1 2014 May 15, 2014
AMERICAN INTERNATIONAL GROUP INC History Reduced 19,174 923 0.0% 0.0% 78 -1,240 -6.07% Q1 2014 May 12, 2014
BLACKROCK ADVISORS LLC History Reduced 19,011 916 25.93% 234.56% 79 -182,545 -90.57% Q1 2014 Jun 05, 2014
Catalyst Capital Advisors LLC History New 15,000 723 0.16% 80 +15,000 New Q1 2014 May 12, 2014
Jefferies Group LLC History New 14,693 708 0.01% 81 +14,693 New Q1 2014 May 16, 2014
Invesco Ltd. History Reduced 12,179 587 0.0% 0.0% 82 -1,295 -9.61% Q1 2014 May 15, 2014
Teton Advisors, Inc. History Reduced 11,000 530 0.04% 0.04% 83 -4,800 -30.38% Q1 2014 May 02, 2014
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO History No change 9,807 473 0.0% 0.0% 84 0 0.0% Q1 2014 May 02, 2014
MARTINGALE ASSET MANAGEMENT L P History Reduced 9,703 468 0.02% 0.02% 85 -4,515 -31.76% Q1 2014 May 14, 2014
PRINCIPAL FINANCIAL GROUP INC History Reduced 9,280 447 0.0% 0.0% 86 -110 -1.17% Q1 2014 May 13, 2014
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC History No change 8,399 405 0.0% 0.0% 87 0 0.0% Q1 2014 May 23, 2014
JENNISON ASSOCIATES LLC History Reduced 7,607 367 0.0% 0.0% 88 -8,687 -53.31% Q1 2014 May 07, 2014
Janney Montgomery Scott LLC History Reduced 7,500 361 0.01% 0.01% 89 -300 -3.85% Q1 2014 May 14, 2014
PILLAR PACIFIC CAPITAL MANAGEMENT LLC History No change 7,200 347 0.07% 0.06% 90 0 0.0% Q1 2014 May 02, 2014
PNC FINANCIAL SERVICES GROUP, INC. History Reduced 7,080 340 0.0% 0.0% 91 -6,730 -48.73% Q1 2014 May 09, 2014
KEYBANK NATIONAL ASSOCIATION/OH History Added to 6,694 323 0.0% 0.0% 92 +184 2.83% Q1 2014 May 14, 2014
TUDOR INVESTMENT CORP ET AL History Reduced 6,357 306 0.01% 0.37% 93 -180,038 -96.59% Q1 2014 May 15, 2014
GHP Investment Advisors, Inc. History No change 5,712 275 0.09% 0.08% 94 0 0.0% Q1 2014 Apr 28, 2014
Absolute Return Capital, LLC History New 5,535 267 0.0% 95 +5,535 New Q1 2014 May 15, 2014
GUGGENHEIM CAPITAL LLC History New 5,377 259 0.0% 96 +5,377 New Q1 2014 May 16, 2014
GROUP ONE TRADING, L.P. History Reduced 4,971 240 0.0% 0.0% 97 -1,216 -19.65% Q1 2014 May 07, 2014
ROYAL BANK OF CANADA History No change 4,860 234 0.0% 0.0% 98 0 0.0% Q1 2014 May 15, 2014
SPRINGBOK CAPITAL MANAGEMENT, LLC History New 4,728 228 0.03% 99 +4,728 New Q1 2014 May 15, 2014
CATAPULT CAPITAL MANAGEMENT LLC History Reduced 4,600 222 0.04% 0.8% 100 -79,200 -94.51% Q1 2014 May 15, 2014
Freestone Capital Holdings, LLC History New 4,410 213 0.04% 101 +4,410 New Q1 2014 May 15, 2014
Weiss Multi-Strategy Advisers LLC History Reduced 4,200 202 0.0% 0.2% 102 -230,801 -98.21% Q1 2014 May 15, 2014
Concept Capital Markets, LLC History New 3,500 169 0.06% 103 +3,500 New Q1 2014 May 13, 2014
IndexIQ Advisors LLC History New 3,190 154 0.01% 104 +3,190 New Q1 2014 May 05, 2014
DIAM Co., Ltd. History New 2,538 122 0.0% 105 +2,538 New Q1 2014 May 05, 2014
UBS AG History Added to 2,284 110 0.0% 0.0% 106 +138 6.43% Q1 2014 May 16, 2014
Capital Research Global Investors History Reduced 1,640,725 79 0.03% 0.04% 107 -768,654 -31.9% Q1 2014 May 15, 2014
WELLS FARGO & COMPANY/MN History Reduced 1,111 54 0.0% 0.0% 108 -160,510 -99.31% Q1 2014 May 15, 2014
TEACHER RETIREMENT SYSTEM OF TEXAS History Reduced 1,052 51 0.0% 0.0% 109 -3 -0.28% Q1 2014 May 01, 2014
GREAT WEST LIFE ASSURANCE CO /CAN/ History No change 1,075 51 0.0% 0.0% 110 0 0.0% Q1 2014 May 01, 2014
BlackRock Inc. History No change 998 48 0.0% 0.11% 111 0 0.0% Q1 2014 May 02, 2014
BANK OF MONTREAL /CAN/ History Reduced 690 33 0.0% 0.0% 112 -484 -41.23% Q1 2014 May 15, 2014
Tower Research Capital LLC History Added to 380 18 0.0% 0.0% 113 +98 34.75% Q1 2014 May 02, 2014
BNP PARIBAS ARBITRAGE, SA History New 132 6 0.0% 114 +132 New Q1 2014 May 13, 2014
Wunderlich Securities, Inc. History New 80 4 0.0% 115 +80 New Q1 2014 Jun 12, 2014
HealthCor Management, L.P. History Closed out 0 0 5.81% -2,375,000 -100.0% Q4 2013 Feb 14, 2014
EAGLE ASSET MANAGEMENT INC History Closed out 0 0 0.36% -1,596,139 -100.0% Q4 2013 Jan 31, 2014
Capital World Investors History Closed out 0 0 0.01% -1,105,000 -100.0% Q4 2013 Feb 14, 2014
PointState Capital LP History Closed out 0 0 0.28% -550,000 -100.0% Q4 2013 Feb 14, 2014
ARDSLEY ADVISORY PARTNERS History Closed out 0 0 2.51% -470,000 -100.0% Q4 2013 Feb 12, 2014
PRICE T ROWE ASSOCIATES INC /MD/ History Closed out 0 0 0.0% -428,056 -100.0% Q4 2013 Feb 18, 2014
SAC Capital Advisors LP History Closed out 0 0 0.07% -290,275 -100.0% Q4 2013 Feb 14, 2014
NORGES BANK History Closed out 0 0 0.01% -232,733 -100.0% Q4 2013 May 12, 2014
TURNER INVESTMENTS, L.P. History Closed out 0 0 0.16% -226,963 -100.0% Q4 2013 Feb 13, 2014
RUSSELL FRANK CO/ History Closed out 0 0 0.01% -135,817 -100.0% Q4 2013 Feb 14, 2014
BNP Paribas Investment Partners S.A. History Closed out 0 0 0.03% -100,609 -100.0% Q4 2013 Feb 14, 2014
CR Intrinsic Investors, LLC History Closed out 0 0 0.15% -85,000 -100.0% Q4 2013 Feb 14, 2014
Iguana Healthcare Management, LLC History Closed out 0 0 1.72% -75,000 -100.0% Q4 2013 Feb 14, 2014
OXFORD ASSET MANAGEMENT History Closed out 0 0 2.54% -45,250 -100.0% Q4 2013 Jun 04, 2014
First Light Asset Management, LLC History Closed out 0 0 1.5% -44,010 -100.0% Q4 2013 Feb 14, 2014
JACOBS LEVY EQUITY MANAGEMENT, INC History Closed out 0 0 0.02% -34,800 -100.0% Q4 2013 Feb 14, 2014
BALYASNY ASSET MANAGEMENT LLC History Closed out 0 0 0.02% -34,262 -100.0% Q4 2013 Feb 14, 2014
FALCON POINT CAPITAL, LLC History Closed out 0 0 1.11% -28,842 -100.0% Q4 2013 Jan 28, 2014
Neuberger Berman Group LLC History Closed out 0 0 0.0% -28,200 -100.0% Q4 2013 Feb 11, 2014
Napier Park Global Capital LLC History Closed out 0 0 0.18% -25,453 -100.0% Q4 2013 Feb 13, 2014
Nationwide Fund Advisors History Closed out 0 0 0.0% -21,799 -100.0% Q4 2013 Feb 07, 2014
DEERFIELD MANAGEMENT CO History Closed out 0 0 0.04% -20,000 -100.0% Q4 2013 Feb 14, 2014
FORTALEZA ASSET MANAGEMENT INC/ History Closed out 0 0 0.34% -16,810 -100.0% Q4 2013 Feb 11, 2014
J. Goldman & Co LP History Closed out 0 0 0.07% -14,599 -100.0% Q4 2013 Feb 14, 2014
FIRST QUADRANT L P/CA History Closed out 0 0 0.01% -12,300 -100.0% Q4 2013 Jan 29, 2014
TD ASSET MANAGEMENT INC History Closed out 0 0 0.0% -11,100 -100.0% Q4 2013 Feb 07, 2014
BOGLE INVESTMENT MANAGEMENT L P /DE/ History Closed out 0 0 0.03% -7,764 -100.0% Q4 2013 Feb 14, 2014
PACIFIC ALTERNATIVE ASSET MANAGEMENT COMPANY, LLC History Closed out 0 0 0.09% -6,665 -100.0% Q4 2013 Feb 10, 2014
Granite Point Capital Management, L.P. History Closed out 0 0 0.04% -6,153 -100.0% Q4 2013 Feb 13, 2014
PRUDENTIAL FINANCIAL INC History Closed out 0 0 0.0% -5,806 -100.0% Q4 2013 Feb 11, 2014
DAVENPORT & Co LLC History Closed out 0 0 0.0% -5,200 -100.0% Q4 2013 Jan 31, 2014
KBC Group NV History Reduced 1 0 0.0% -1,017 -99.9% Q1 2014 Apr 30, 2014