NEW YORK (Reuters) -JPMorgan Chase's board is spending "significant" time on developing executives viewed as strong contenders to succeed CEO Jamie Dimon, it said, highlighting the succession planning underway at the biggest U.S. bank by assets.

The bank reshuffled executives in January to give them more experience running different businesses. An orderly CEO transition is the top priority for the board, it said in a regulatory filing on Monday.

Here are biographies of the bank's key leaders, based on company documents, statements and Reuters reports.

JAMIE DIMON, CEO

Dimon has been at the helm of the lender for 18 years, steering it through the 2008 financial crisis before playing, according to several sources, a major role in the rescue of First Republic last year as bank failures roiled the sector.

Arguably Wall Street's most prominent executive, the CEO is also a leading voice in corporate America. He is often asked to weigh in on economic, business and public policy issues and presents his views in an annual letter.

Dimon is known for being a larger-than-life personality who occasionally curses during public appearances. He also has a reputation for being meticulous and setting a high bar for performance among the company's employees.

During his time at the helm, several executives who were viewed as potential successors have left for other opportunities.

Dimon, whose pay rose 4% to $36 million for 2023, also has a financial incentive to stay. The bank's board awarded him a retention bonus of 1.5 million stock options in 2021 that can only be exercised in 2026.

DANIEL PINTO, PRESIDENT AND CHIEF OPERATING OFFICER

Pinto has spent his entire four-decade career at JPMorgan or its predecessor companies. He was promoted to president and COO in 2018 and ran the bank when Dimon had emergency heart surgery in 2020.

"Should the need arise in the near-term, we view Mr. Pinto as a key executive who is immediately ready to fulfill the responsibilities of the CEO," according to Monday's filing.

The executive rose through the trading business, running emerging markets, credit and fixed income. He became the head of its corporate and investment banking unit in 2014.

MARIANNE LAKE, CEO OF CONSUMER AND COMMUNITY BANKING

Lake in January was named the sole CEO of the consumer and community bank after jointly leading it with Jennifer Piepszak. Lake previously served as finance chief from 2013 to 2019.

The consumer division accounts for the bank's largest chunk of revenue, bringing in $18 billion in the fourth quarter.

Lake, a two-decade veteran of the firm, "has all of the qualities of a great leader," Dimon has said. Those include being demanding, drawing information out of people, recognizing talent and also challenging Dimon when she believes he is wrong, he said.

JENNIFER PIEPSZAK, CO-CEO OF COMMERCIAL & INVESTMENT BANK

Piepszak is the co-CEO of a newly merged commercial and investment banking unit with Troy Rohrbaugh.

In her nearly three decades at JPMorgan she has served as its finance chief, from 2019 to 2021, and CEO of card services and business banking. Piepszak also spent 17 years climbing the ranks in investment banking.

Lake and Piepszak were among the executives in charge of integrating failed First Republic Bank after JPMorgan bought it last year. The company had not made acquisitions of this scale since its financial crisis-era takeovers of Bear Stearns and Washington Mutual.

TROY ROHRBAUGH, CO-CEO OF COMMERCIAL & INVESTMENT BANK

Rohrbaugh, co-CEO of the newly-merged commercial and investment banking unit alongside Piepszak, traded currency options earlier in his career.

He was given a bigger remit to oversee markets, sales, research and securities services last year.

JPMorgan's trading business boomed as the Federal Reserve raised interest rates, fueling market volatility and client activity.

"If you went to any one of our traders right now in any asset class - equities, mortgages, commodities - they would tell you they are trading U.S. interest rates," Rohrbaugh told Reuters last year.

DOUG PETNO, CEO OF COMMERCIAL BANKING

Petno will lead an expanded commercial banking business that includes global corporate banking.

He has been at the bank for more than three decades, running a unit that has more than 18,000 clients, including mid-sized businesses and corporations, government entities and non-profits, and more than 33,000 real estate investors or owners.

He previously led JPMorgan's investment banking group covering natural resources.