Assets managed by the New York-based company increased to $11.55 trillion from $10.01 trillion a year earlier and $11.48 trillion in the third quarter.
Client assets were buoyed by a U.S. stock market rally after Donald Trump's presidential election victory in November, with investors betting on lower corporate taxes and deregulation.
BlackRock's quarterly results complete a banner year for the asset manager, which has sought to strengthen its position in rapidly growing private markets, spending about $25 billion last year on infrastructure investment fund Global Infrastructure Partners and private credit business HPS Investment Partners.
"For many companies, periods of M&A contribute to a pause in client engagement. At BlackRock, clients are instead embracing and rewarding our strategy," CEO Larry Fink said in a statement on Wednesday.
Net income rose to $1.67 billion, or $10.63 per share, in the three months to Dec. 31 from $1.38 billion, or $9.15 per share, a year earlier. BlackRock registered $201 billion in long-term net inflows in the fourth quarter. Total net inflows hit $281.4 billion, up from $95.6 billion a year ago.
A majority of the long-term inflows were captured by exchange-traded funds (ETFs), at $142.6 billion. Clients poured in $23.8 billion into BlackRock's fixed-income products.
Assets under management mainly depend on two factors - the performance of investments, and money flowing in and out of the funds.
The benchmark S&P 500 index (.SPX) gained 2.1% in the fourth quarter and finished the year up 23.3%, marking its second straight year of gains exceeding 20%.
Elsewhere, the MSCI's gauge of stocks across the globe (.MIWD00000PUS) fell 1.2% in the fourth quarter but finished up 15.7% in 2024, marking its second straight yearly gain.
"Strong asset inflows this quarter contributed to a record-setting year for BLK," said Kyle Sanders, senior equity research analyst at Edward Jones.
This, he said, "should boost investor confidence that the long-awaited great rotation, where investors move off the sidelines and start to 're-risk' by investing in equity and fixed income products, is beginning to materialize."
Shares of the company were up 2% in premarket trading.
