SHAREHOLDER INVESTIGATION: Halper Sadeh LLP Investigates XLRN, AZPN, UMPQ, TGP; Shareholders are Encouraged to Contact the Firm

NEW YORK, Oct. 13, 2021

Acceleron Pharma Inc. (NASDAQ: XLRN) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to its sale to Merck & Co., Inc. for $180.00 per share in cash. If you are an Acceleron shareholder, click here to learn more about your rights and options.

Aspen Technology, Inc. (NASDAQ: AZPN) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to its merger with certain of Emerson Electric Co.'s industrial software businesses. Under the terms of the agreement, Aspen shareholders will receive approximately $87.00 per share in cash and 0.42 shares of common stock of the combined company for each share of Aspen common stock they own. If you are an Aspen 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.  

Teekay LNG Partners L.P. (NYSE: TGP) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to its sale to Stonepeak for $17.00 in cash per common unit or common unit equivalent. If you are a Teekay LNG 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.