To realize better synergies between people in its personal and workplace investing divisions, Fidelity is reshuffling about 1,000 staff members in four locations.

People will be moved around in Merrimack, N.H., but 950 people will be removed from Marlborough, Mass., and there will be 500 additional workers in both Boston and Smithfield, R.I.

Fidelity, which employs 11,000 people in Massachusetts, said it was making the changes to “ensure that groups with share accountabilities and natural synergies are located near each other.”

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