News article: https://www.cnbc.com/2018/09/04/fidelity-offers-first-ever-free-index-funds-and-1-billion-follows.html
Link to the funds: Fidelity ZERO Total Market Index Fund (FZROX)
Fidelity ZERO International Index Fund (FZILX)
Technically they only had $753.5M+$234.18M=$987.68M on August 31 but according to CNBC that’s good enough to round up to a billion.
h/t notafeg