SHAREHOLDER INVESTIGATION: Halper Sadeh LLP Investigates ROG, RRD, MIME, UMPQ; Shareholders are Encouraged to Contact the Firm

NEW YORK, Dec. 14, 2021

Rogers Corporation (NYSE: ROG) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to its sale to DuPont de Nemours, Inc. for $277.00 in cash per share. If you are a Rogers shareholder, click here to learn more about your rights and options.

R.R. Donnelley & Sons Company (NYSE: RRD) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to a sale of the company. If you are an RRD shareholder, click here to learn more about your rights and options.

Mimecast Limited (NASDAQ: MIME) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to its sale to funds advised by Permira for $80.00 per share in cash. If you are a Mimecast shareholder, click here to learn more about your rights and options.

Umpqua Holdings Corporation (NASDAQ: UMPQ) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to its sale to Columbia Banking System, Inc. Under the terms of the agreement, Umpqua shareholders will receive 0.5958 of a share of Columbia stock for each Umpqua share they own. Upon completion of the transaction, Umpqua shareholders will own approximately 62% of the combined company. If you are an Umpqua shareholder, click here to learn more about your rights and options.

Halper Sadeh LLP may seek increased consideration, additional disclosures and information concerning the proposed transaction, or other relief and benefits on behalf of shareholders.