Vanguard, BlackRock join investors pledging to hit net zero Alastair Marsh, Bloomberg News VIDEO SIGN OUT The worldâs largest asset managers have joined a group of investors committing to cut the net greenhouse-gas emissions of their portfolios to zero. BlackRock Inc. and Vanguard Group Inc. are among 43 investment firms managing more thanâ¯US$22.8 trillion of assets that are joining the Net Zero Asset Managers initiative, according to a statement Monday. By signing up, the money managers are pledging to support efforts to limit global warming to 1.5 degrees Celsius by targeting net-zero emissions by 2050 across all their holdings. They also will set a public goal for the proportion of their assets that in 2030 will be on course for net zero.