Marianne Lake (born 1969) is a senior British-American banker.

Lake was born to an American mother and English father, and has dual nationality.^[2]

Lake has said that she aimed high - encouraged by her mother - from an early age.^[3]

She did her bachelor's degree in physics from the University of Reading in United Kingdom.^[4]

Lake trained as a Chartered Accountant from Institute of Chartered Accountants in England and Wales at PwC^[5] and worked for the firm in London and Sydney.

She joined JPMorgan Chase in 1999.^[6] She initially worked in London, moving to New York in 2004,^[7] and in various roles in the finance functions within the bank.^[8] Lake was chief financial officer^[9] from 2013 to 2019.^[10] She was chief executive officer of consumer lending from 2019 to 2021.^[11][12] In 2021 Lake and Jennifer Piepszak were named heads of the consumer and community bank.^[13] In 2024 she became sole CEO of this business.^[14] In January 2024, following a re-shuffle at JP Morgan Chase, Lake was tipped in the media as a likely successor to Jamie Dimon as CEO of the global firm. Lake is a member of the JPMorgan Chase Operating Committee.

Lake has emphasized JPMorgan Chase's role as a technological innovator.^[15]

Lake co-founded the Women on the Move initiative within JPMorgan Chase.^[16][17][18]

She was ranked 23rd on Fortune's list of Most Powerful Women in 2023.^[19]

At age 41 Lake decided to have her three children through a surrogate even though she didn't have a partner.^[7][20][3]