By Rebecca Ungarino

A longtime BlackRock executive who shaped the firm's digital assets, index, data, and technology strategies has left the firm after two decades.

Joseph Chalom, who was the head of strategic ecosystem partnerships, retired from BlackRock in June, a company spokesman confirmed.

Chalom was core to the high-profile partnership BlackRock struck with Coinbase in 2022, when the asset manager started to offer crypto access to clients of its flagship Aladdin investment-management tech platform.

He also oversaw relationships with sustainability analytics provider ClarityAI and tokenization start-up Securitize, which BlackRock backed with strategic minority investments in 2021 and 2024, respectively. He served on both companies' boards.

BlackRock is the world's largest money manager with $12.5 trillion of assets. In recent years, it has launched a series of crypto products, including its $88 billion iShares Bitcoin Trust ETF, and worked with other digital assets firms, including Circle and Anchorage Digital.

After a period of working as an advisor to BlackRock, the veteran financial executive Mark Cullen has taken over from Chalom as head of index and data solutions and head of strategic ecosystem partnerships.

Cullen previously held leadership roles at Deutsche Bank and its asset management business, DWS.

Ardeshir Mistri, a managing director who oversees index provider strategy within BlackRock's global product solutions group, is taking on expanded responsibilities and will work closely with Cullen. Robbie Mitchnick's position as BlackRock's head of digital assets is unchanged.

A lawyer by trade, Chalom joined BlackRock in 2005 and has worked in senior roles including as longtime chief operating officer of the division that houses Aladdin.

Write to Rebecca Ungarino at rebecca.ungarino@barrons.com

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July 23, 2025 10:16 ET (14:16 GMT)

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