TESARO, Inc. is an oncology-focused biopharmaceutical company, which engages in the research and development of biopharmaceutical products. The firm offers Niraparib products. The company was founded by Leon Oliver Moulder, Jr., Mary Lynne Hedley, and Richard J. Rodgers on March 26, 2010 and is headquartered in Waltham, MA.

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All investments involve risks, including the loss of principal. Securities trading offered through Robinhood Financial LLC, [Member SIPC ](https://www.sipc.org/) and a registered broker-dealer.

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Options trading entails significant risk and is not appropriate for all investors. Options transactions are often complex and may involve the potential of losing your entire investment. Investors should consider their investment objectives and risks carefully before investing in options. To learn more about the risks associated with options, please read the [Characteristics and Risks of Standardized Options](https://cdn.robinhood.com/assets/robinhood/legal/Characteristics%20and%20Risks%20of%20Standardized%20Options.pdf) before you begin trading options. Supporting documentation for any claims, if applicable, will be furnished upon request.

Please also be aware of the risks listed in the following documents: [Day Trading Risk](https://d2ue93q3u507c2.cloudfront.net/assets/robinhood/legal/RHF%20Day%20Trading%20Risk%20Disclosure.pdf) [Disclosure Statement](https://d2ue93q3u507c2.cloudfront.net/assets/robinhood/legal/RHF%20Day%20Trading%20Risk%20Disclosure.pdf) and [FINRA Investor Information](https://www.finra.org/investors/learn-to-invest/advanced-investing/purchasing-margin).

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The line chart allows you to select different time spans. Each time span plots a time interval. On the 1 day span and weekly span, there is additional logic to only show the interval when trades occur. This allows you to see when trading volume occurs during periods of slower activity like extended hours or thinly traded equities. The candlestick chart works in the same manner.

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TESARO

Why Robinhood?

About TSRO

TESARO, Inc. is an oncology-focused biopharmaceutical company, which engages in the research and development of biopharmaceutical products. The firm offers Niraparib products.

TSRO Key Statistics

TESARO

Why Robinhood?

TESARO, Inc. is an oncology-focused biopharmaceutical company, which engages in the research and development of biopharmaceutical products. The firm offers Niraparib products. Show more

TSRO Key Statistics

TESARO, Inc. is an oncology-focused biopharmaceutical company, which engages in the research and development of biopharmaceutical products. The firm offers Niraparib products.