AGREEMENT

EXHIBIT 99.1

AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that this Statement on Schedule 13D relating to the Common Stock, $0.0001 par value, of Genomic Health, Inc. is being filed with the Securities and Exchange Commission on behalf of each of them.

May 17, 2012

	XXXXX BROS. ADVISORS, LLC
	By:	/s/ Xxxxx X. Xxxxxxx
		Name: Xxxxx X. Xxxxxxx
		Title: President
		/s/ Xxxxxx X. Xxxxx
		Xxxxxx X. Xxxxx
		/s/ Xxxxx X. Xxxxx
		Xxxxx X. Xxxxx