EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 

In connection with the Quarterly Report of Exact Sciences Corporation (the “Company”) on Form 10-Q for the quarter ended March 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Kevin T. Conroy, President and Chief Executive Officer of the Company and Jeffrey T. Elliott, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

Dated: May 8, 2024	/s/ Kevin T. Conroy
	Name:	Kevin T. Conroy
	Title:	President and Chief Executive Officer
		(Principal Executive Officer)
Dated: May 8, 2024	/s/ Jeffrey T. Elliott
	Name:	Jeffrey T. Elliott
	Title:	Executive Vice President and Chief Financial Officer
		(Principal Financial Officer and Principal Accounting Officer)