Fidelity Investments Inc., already one of the largest employers in New Hampshire, is about to become even larger.

The massive investment firm announced April 28 that it plans to add 1,200 jobs at its Merrimack campus — one-tenth of a total 12,000 jobs that the company said it will add worldwide.

It’s the third consecutive year that Fidelity has added a significant number of jobs in Merrimack, which is already home to about 6,500 employees.

According to Joe Murray, vice president of government relations and public affairs in Merrimack, the company expects to add the jobs between now and the end of the third quarter, primarily customerfacing and technology positions.

The latest hiring spree comes “in response to our continued customer engagement and to stay ahead of emerging customer needs, putting us on track for a third consecutive year of record hiring,” Murray said.

Since the pandemic, the company has grown significantly. In 2020, it had 49,000 jobs worldwide, and by the end of 2021, that number grew to 57,000. The addition of the new jobs will bring total employment to 69,000 worldwide — nearly a 20 percent jump from the beginning of 2021.

The firm manages 401(k) plans for more than 20 million people across 23,000 companies. Fidelity has $11.3 trillion assets under administration, including discretionary assets of $4.2 trillion.

In 2021, Fidelity reported revenue surpassing $24 billion, a 15 percent yearover-year increase, along with another record year for profits, with $8.1 billion in operating income. — JEFF FEINGOLD