Top 1%: 40% to 54% -> +14%
Top 10%: 77% to 93% -> +16%
Top 10% minus the top 1%: 37% to 39% -> +2%
Essentially this was all the top 1% and the rest of the 10%ers barely budged in ownership percent. I'd be curious to see the results for top 0.1% and 0.01% as well.
[edit] Found the source numbers:
50-90% https://fred.stlouisfed.org/series/WFRBSN40172
90-99% https://fred.stlouisfed.org/series/WFRBSN09145
99-99.9% https://fred.stlouisfed.org/series/WFRBS99T999258
top 0.1% https://fred.stlouisfed.org/series/WFRBSTP1285
Bottom 50% barely registers, hovering below 1% https://fred.stlouisfed.org/series/WFRBSB50199
It looks like the top 0.1% barely nudged in the past two decades as well. I would guess that the top 0.1% is probably hard to account for given all the ways the wealthiest can distribute their wealth to make it opaque and hard to granularly track. Those numbers could reflect changes in choices of financial vehicles for the wealthiest households.