Kiwoom Securities said on Tuesday that balances in its brokerage individual savings account (ISA) reached 3.007 trillion won as of Feb. 6, based on the amount invested.

The evaluated amount was 3.5623 trillion won. As the domestic stock market performed strongly, the evaluated amount grew larger than the invested amount.

Kiwoom Securities' brokerage ISA balance stood at 1.2 trillion won at end-2024 and rose to nearly triple in a little over a year. The number of subscribed accounts also jumped from 145,000 at end-2024 to more than 350,000 recently.

Kiwoom Securities started as a late entrant in brokerage ISAs but has steadily raised its market share over the past two years. Its market share by number of brokerage ISA accounts rose to 1.36 percent in 2023, 2.9 percent in 2024 and 4.44 percent in 2025.

Its market share by balance was 7.4 percent last year. The average subscription amount per person was 8.6 million won, larger than the overall brokerage ISA average of 4.8 million won, based on figures compiled by the Korea Financial Investment Association.

A Kiwoom Securities official said its strategy tailored to customer needs improved customer accessibility. The official added that offering various event benefits and marketing to open brokerage ISA accounts through external partnerships also proved effective.