United States · Funded startup
4 rounds we have observed, with the 7 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Funding summaryUpdated 26 Oct 2026
$661Mraised across 4 rounds since 2010, from 4 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Source recordedSEC filing: $50M sold, first sale Apr 2016
New Enterprise Associates
Kleiner Perkins Caufield & Byers
InterWest Partners
T. Rowe Price
Pappas VenturesReported by finsmes.comSEC filing: $40M sold, first sale Jun 2011
Reported by onbiovc.comSEC filing: $10M sold, first sale May 2010
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
New Enterprise AssociatesKleiner Perkins Caufield & Byers
Kleiner PerkinsInterWest Partners
DeerfieldT. Rowe PricePappas VenturesFrom historical deal records. Wrong? Tell us.
Missing a round, or an investor who was in one? Tell us.
TESARO's investors include New Enterprise Associates, Kleiner Perkins Caufield & Byers, Kleiner Perkins, InterWest Partners and Deerfield, and 2 more on record.
TESARO has raised $661M across 4 rounds since 2010.
TESARO's most recent round was an Undisclosed round of $409M in Jun 2016.
Its most recent round, $409M in Jun 2016, is also its largest on record.
TESARO's first round on record, in May 2010, was backed by New Enterprise Associates.
TESARO's latest named round is an Undisclosed round, in Jun 2016.
TESARO is based in the United States.
In the same sector, and raised in the last eighteen months.
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United States · 
