A. Schulman (SLMNP) 10-Q 2012 Q3 Quarterly report

Exhibit 32

Certifications of Principal Executive and Principal Financial Officers

Pursuant to 18 U.S.C. 1350

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 A. Schulman, Inc. (the “Company”) on Form 10-Q for the period ending May 31, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned officer of the Company does hereby certify that:

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

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

/s/ Joseph M. Gingo

Joseph M. Gingo

President and Chief Executive Officer of A. Schulman, Inc.

July 9, 2012

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 A. Schulman, Inc. (the “Company”) on Form 10-Q for the period ending May 31, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned officer of the Company does hereby certify that:

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

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

/s/ Joseph J. Levanduski

Joseph J. Levanduski

Vice President, Chief Financial Officer, and Treasurer of A. Schulman, Inc.

July 9, 2012