SEC Info - TESARO, Inc. - IPO: ‘S-1’ on 3/23/12

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TESARO, Inc. – IPO: ‘S-1’ on 3/23/12 – ‘EX-23.1’

On: Friday, 3/23/12, at 2:09pm ET · Accession #: 1047469-12-3207 · File #: 333-180309

  As Of                Filer                Filing    For·On·As Docs:Size              Issuer               Agent

 3/23/12  TESARO, Inc.                      S-1                   15:3.0M                                   Merrill Corp/New/FA

Initial Public Offering (IPO): Registration Statement (General Form) — Form S-1
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: S-1         Registration Statement (General Form)               HTML   1.19M 
 2: EX-3.1      Articles of Incorporation/Organization or By-Laws   HTML    120K 
 3: EX-3.2      Articles of Incorporation/Organization or By-Laws   HTML     14K 
 4: EX-3.3      Articles of Incorporation/Organization or By-Laws   HTML    137K 
 5: EX-10.1     Material Contract                                   HTML    268K 
11: EX-10.13    Material Contract                                   HTML     79K 
12: EX-10.14    Material Contract                                   HTML     78K 
13: EX-10.15    Material Contract                                   HTML     78K 
14: EX-10.16    Material Contract                                   HTML     56K 
 6: EX-10.5     Material Contract                                   HTML     64K 
 7: EX-10.6     Material Contract                                   HTML     75K 
 8: EX-10.7     Material Contract                                   HTML     71K 
 9: EX-10.8     Material Contract                                   HTML     72K 
10: EX-10.9     Material Contract                                   HTML     71K 
15: EX-23.1     Consent of Experts or Counsel                       HTML      9K

EX-23.1 — Consent of Experts or Counsel
Exhibit Table of Contents

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		Alternative Formats (Word, et al.) Consent of Independent Registered Public Accounting Firm Exhibit 23.1 QuickLinks
1	1st Page – Filing Submission
"	Exhibit 23.1
"	Consent of Independent Registered Public Accounting Firm
"	QuickLinks

This Exhibit is an HTML Document rendered as filed. [ Alternative Formats ]

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Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption "Experts" and to the use of our report dated March 23, 2012, in the Registration Statement (Form S-1) and the related Prospectus of TESARO, Inc.


		/s/ *Ernst & Young LLP*

Boston, Massachusetts
March 23, 2012

QuickLinks

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

Dates Referenced Herein

This ‘S-1’ Filing	Date	Other Filings

Filed on:	3/23/12	None on these Dates
		List all Filings

4 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 6/14/12  SEC                               UPLOAD¶    10/12/17    1:56K  TESARO, Inc.
 6/11/12  SEC                               UPLOAD¶    10/12/17    1:55K  TESARO, Inc.
 5/23/12  SEC                               UPLOAD¶    10/12/17    1:62K  TESARO, Inc.
 4/20/12  SEC                               UPLOAD¶    10/12/17    1:81K  TESARO, Inc.

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Filing Submission 0001047469-12-003207 – Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

TESARO, Inc. – IPO: ‘S-1’ on 3/23/12 – ‘EX-23.1’

On: Friday, 3/23/12, at 2:09pm ET · Accession #: 1047469-12-3207 · File #: 333-180309

Previous ‘S-1’: None · Next: ‘S-1/A’ on 5/17/12 · Latest: ‘S-1/A’ on 2/25/13 · 4 References: By: SEC – ‘UPLOAD’ on 6/14/12 By: SEC – ‘UPLOAD’ on 6/11/12 By: SEC – ‘UPLOAD’ on 5/23/12 By: SEC – ‘UPLOAD’ on 4/20/12

Initial Public Offering (IPO): Registration Statement (General Form) — Form S-1Filing Table of Contents

EX-23.1 — Consent of Experts or CounselExhibit Table of Contents

This Exhibit is an HTML Document rendered as filed. [ Alternative Formats ]

Dates Referenced Herein

4 Subsequent Filings that Reference this Filing

Previous ‘S-1’: None · Next: ‘S-1/A’ on 5/17/12 · Latest: ‘S-1/A’ on 2/25/13 · 4 References:

Initial Public Offering (IPO): Registration Statement (General Form) — Form S-1
Filing Table of Contents

EX-23.1 — Consent of Experts or Counsel
Exhibit Table of Contents