Who owns Cyberonics?

Key details on Cyberonics (Ticker: CYBX)

Who owns Cyberonics?

Is CYBX a good stock to own? Find out who bought Cyberonics, who sold Cyberonics (CYBX) stock, and who holds a large position in Cyberonics.

Fund Name Number of Shares Share Valuation As Of
Schroder Investment Management 6.06M $307.66M Sept. 30, 2013
Renaissance Technologies 2.47M $125.12M Sept. 30, 2013
Timpani Capital Management 2.06M $2.06M Dec. 31, 2012
Palo Alto Investors 1.95M $127.67M Dec. 31, 2013
Icahn Capital 1.93M $61.38M March 31, 2011
Vanguard 1.77M $116.17M Dec. 31, 2013
BlackRock Fund Advisors 1.41M $92.24M Dec. 31, 2013
Damian Sousa 1.21M $79.27M Dec. 31, 2013
William Blair $ Company 934677 $49.10M Dec. 31, 2012
RS INVESTMENT MANAGEMENT 912588 $59.78M Dec. 31, 2013
KALMAR INVESTMENTS INC /DE/ 884645 $57.87M Dec. 31, 2013
BlackRock Institutional Trust Company, N.A. 799317 $52.29M Dec. 31, 2013
STATE STREET CORPORATION 761263 $49.87M Dec. 31, 2013
MACKENZIE FINANCIAL 744803 $48.73M Dec. 31, 2013
Luther King Capital Management Corporation 738365 $48.30M Dec. 31, 2013
Columbus Circle Investors 738235 $34.55M March 31, 2013
Waddell & Reed Financial 662263 $43.38M Dec. 31, 2013
CITADEL ADVISORS 648412 $30.35M March 31, 2013
Neuberger Berman 642156 $28.86M June 30, 2012
FMR 613600 $31.88M June 30, 2013
Visium Asset Management 606914 $28.40M March 31, 2013
Sentinel Asset Management 589400 $22.47M March 31, 2012
Century Capital Management 556089 $36.43M Dec. 31, 2013
Westfield Capital Management Company 544600 $35.63M Dec. 31, 2013
Chartwell Investment Partners 532785 $20.32M March 31, 2012
DIMENSIONAL FUND ADVISORS 516466 $33.83M Dec. 31, 2013
Hussman Econometrics Advisors 509000 $25.83M Sept. 30, 2013
Heather K. Mellem, Esq. 504310 $16.89M Dec. 31, 2011
Perella Weinberg Partners Capital Management 488033 $25.36M June 30, 2013
NORTHERN TRUST 411539 $26.92M Dec. 31, 2013

Who sold Cyberonics?

Fund Name Date Sold Number of Shares Sold Share Valuation
Parnassus Investments Sept. 30, 2011 400000 $11.32M
CARL C. ICAHN, INDIVIDUAL March 31, 2011 482391 $15.34M
Rainier Investment Management Dec. 31, 2010 710940 $22.05M
Arbor Capital Management Dec. 31, 2010 442900 $13.74M
Driehaus Capital Management Dec. 31, 2010 400953 $12.44M
Manulife Asset Management Sept. 30, 2006 534795 $9.37M