CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

(AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT)

I, Matthew H. Scanlan, President of RS Investment Trust (the “Registrant”), with respect to the report on Form N-CSR/A of RS Investment Trust for the period ended December 31, 2010, as filed with the Securities and Exchange Commission, hereby certify that:

1. The Report on Form N-CSR/A fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date: March 5, 2012	/s/ Matthew H. Scanlan
	Matthew H. Scanlan, President
	(Principal Executive Officer)

I, James E. Klescewski, Treasurer of RS Investment Trust (the “Registrant”), with respect to the report on Form N-CSR/A of RS Investment Trust for the period ended December 31, 2010, as filed with the Securities and Exchange Commission, hereby certify that:

1. The Report on Form N-CSR/A fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date: March 5, 2012	/s/ James E. Klescewski
	James E. Klescewski, Treasurer
	(Principal Financial Officer)