Yes, though Vanguard themselves have supposed stopped offering VOO internally as part of their employee 401(k) plans, and changed over to VTI.
* https://www.marketwatch.com/story/vanguard-thinks-its-own-em...
VTI has become the third ETF to pass US$ 100B in assets:
* https://www.cnbc.com/2018/09/11/most-investors-choose-sp-500...
SPY (a competitor to VOO) is the biggest though, and it follows S&P 500.
