(Adds Development Partners International, Willis Towers Watson PLC, Elliott Management; Updates Merck, Lordstown Motors Corp, Saudi Arabia's Public Investment Fund)
Sept 30 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Thursday:
** Merck & Co is buying Acceleron Pharma Inc XLRN.O for about $11.5 billion, broadening its portfolio beyond aging cancer drug Keytruda with potential treatments that could bring in fresh revenue.
** Swedish cloud communication services provider Sinch said it had agreed to buy cloud-based email delivery platform Pathwire in a cash-and-stock deal worth about $1.9 billion.
** Albemarle Corp said it would buy China-based Guangxi Tianyuan New Energy Materials Co Ltd, a lithium converter, for about $200 million as the company looks to increase its lithium conversion capacity.
** U.S. private equity firm Apollo Global Management said funds managed by its affiliates will buy Mitsubishi Chemical's thermal and emission control protection materials business.
** Cairo-based financial group EFG Hermes is negotiating to buy a stake in privately held Spanish power generation company Ignis Energia, Expansion newspaper said.
** Hedge fund Elliott Management said it owns a "significant" stake in troubled Japanese industrial conglomerate Toshiba Corp , which is conducting a strategic review amid pressure from other investors that could include a sale of the company.
** Private equity firm Development Partners International (DPI) said it has sold about a third of its stake in African quick-service restaurant group Food Concepts to African Capital Alliance (ACA), but will still own a majority of the company.
** Saudi Arabia's Public Investment Fund (PIF), the country's sovereign wealth fund, is considering selling part of its 70% stake in Saudi Telecom Co (STC) while retaining majority ownership, the state fund said.
** Electric vehicle startup Lordstown Motors Corp will announce the sale of the northeast Ohio assembly plant it acquired from General Motors Co to Taiwan contract manufacturer Foxconn , a person familiar with the matter said.
** Activist investors Starboard Value LP and Elliott Management Corp have taken stakes in insurance broker Willis Towers Watson PLC , the Wall Street Journal reported, citing people familiar with the matter.
(Compiled by Rajarshi Roy, Tiyashi Datta and Shreyasee Raj in Bengaluru) ((email@example.com;))