The world’s largest asset manager has found a new leader for its Canadian division.
Bay Street veteran and competitive athlete Katherine Tweedie has been named head of Canada at BlackRock Inc. BLK-N, according to a source familiar with the appointment. The Globe and Mail is not naming the source as they are not authorized to publicly disclose internal deliberations.
She is starting her new role this summer, according to an internal memo viewed by The Globe.
BlackRock Canada declined to comment. The global company’s assets under management recently surpassed US$14-trillion. As of October, 2025, BlackRock managed more than $480-billion on behalf of its Canadian clients, including more than 200 pension plans.
Ms. Tweedie did not immediately reply to a request for comment. She currently works as the Toronto-based co-head of the North American institutional client group and head of Canada for Ninety One, an Anglo-South African investment manager, which as of March 31 held US$226-billion in assets.
Prior to joining Ninety One in 2012, she worked at the World Economic Forum, where she led all African-related affairs and engagement at the annual gathering in Davos.
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Ms. Tweedie replaces Marcia Moffat, who stepped down as head of BlackRock Canada in February, after having held that role since 2015. She joined the board of directors of insurance giant Sun Life Financial Inc. in March.
During her tenure at BlackRock, Ms. Moffat partnered with Royal Bank of Canada in 2019 on the iShares suite of exchange-traded fund products.
The former head of iShares Canada, Helen Hayes, left the company as part of a broader restructuring around one year ago, in late April, 2025. Ms. Hayes joined BlackRock in 2021 to lead iShares Canada. According to data from the Canadian ETF Association, iShares products maintain a dominant share of the country’s ETF market.
Ms. Tweedie got her start in finance working for BMO Capital Markets and CIBC Capital Markets in the late 1990s and early 2000s, respectively. She holds a master’s degree in public administration from the Harvard Kennedy School and a bachelor of commerce from the University of Victoria.
Ms. Tweedie also serves on several volunteer boards of directors, most notably as chair of the Investor Leadership Network. The organization was launched at the 2018 meeting of the G7 and describes itself as “a highly curated, CEO‑led coalition of leading institutional investors dedicated to accelerating the transition to a sustainable and inclusive global economy.”
Ms. Tweedie is also a member of the Women’s College Hospital Foundation’s board of directors, where she chairs the investment committee. She previously served on the St. Michaels University School’s board of governors.
In her personal life, according to her LinkedIn profile, Ms. Tweedie is an avid traveller and a competitive athlete across multiple sports. She holds three Ironman Triathlon age-group wins and was among the top 10 finishers in her age group at the 2005 Ironman World Championships in Hawaii.
Editor’s note: This article has been updated to reflect that Katherine Tweedie no longer serves on the St. Michaels University School’s board of governors.