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

• Artisan Partners Holdings owns 4.28M shares worth $175.85M
• Artisan Partners Limited Partnership owns 3.64M shares worth $353.17M
• T. Rowe Price Associates owns 2.46M shares worth $238.98M
• Vanguard owns 1.95M shares worth $189.39M
• Criterion Capital Management owns 1.23M shares worth $118.92M
• Barclays owns 1.06M shares worth $102.47M
• Riverbrige Partners owns 870580 shares worth $84.48M
• STATE STREET CORPORATION owns 751948 shares worth $72.97M
• Macquarie owns 703408 shares worth $68.26M
• RCM Capital Management owns 637774 shares worth $31.31M
• Franklin Resources owns 609660 shares worth $59.16M
• TAMRO Capital Partners owns 505927 shares worth $49.10M
• Charles Schwab Bank owns 504608 shares worth $5.20M
• Next Century Growth Investors owns 464870 shares worth $42.66M
• CALAMOS ADVISORS owns 457830 shares worth $42.02M
• Otter Creek Management owns 450000 shares worth $43.66M
• William Blair $ Company owns 442516 shares worth $40.61M
• Ranger Investment Management owns 424657 shares worth $41.21M
• Wells Fargo & Company owns 402489 shares worth $31.90M
• BAM owns 387125 shares worth $30.65M
• TCW owns 373543 shares worth $36.25M
• Waddell & Reed Financial owns 367170 shares worth $18.04M
• Select Equity owns 360487 shares worth $26.42M
• SuttonBrook Capital Management owns 320000 shares worth $1.57M
• Ruane, Cunniff & Goldfarb owns 300000 shares worth $29.11M
• ALLIANCEBERNSTEIN owns 292391 shares worth $28.37M
• Norges Bank Investment Management owns 290443 shares worth $21.33M
• JHL Capital owns 285900 shares worth $14.04M
• ClearBridge Advisors owns 285522 shares worth $27.71M
• Cupps Capital Management owns 282935 shares worth $25.96M
• FRED ALGER MANAGEMENT owns 274837 shares worth $26.67M
• Washington Trust Company owns 272200 shares worth $24.98M

• GENEVA INVESTMENT MANAGEMENT OF CHICAGO sold on Sept. 30, 2011
• Daniel D. Thurber sold on Sept. 30, 2011
• GAGNON SECURITIES sold on Sept. 30, 2011
• Ameriprise Financial sold on June 30, 2011
• Copper Rock Capital Partners sold on June 30, 2011
• Columbia Wanger Asset Management sold on March 31, 2011
• FMR sold on Dec. 31, 2010
• Maverick Capital sold on Dec. 31, 2009

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