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Mass. Movers

Repligen urged to boost its value by shareholder

Repligen supplies products used to make biologic drugs. It is also developing a synthetic hormone for use as an imaging agent.

AFP/getty images

Repligen supplies products used to make biologic drugs. It is also developing a synthetic hormone for use as an imaging agent.

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Ronald L. Chez, who with a 9.3 percent stake is one of Repligen Corp.’s largest shareholders, wrote to the Waltham company’s board to express “serious concerns regarding the lack of progress at the Company.” He acquired shares five years ago, he wrote, because the stock “was significantly undervalued.” But because the share price “is virtually unchanged over the past five years,” he requests that the board “take all appropriate actions to unlock the inherent value in the Company and explore strategic alternatives immediately.”

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