Retail investors were heavy net sellers of PLTR on Tuesday, 4 August.
August 5, 2026
According to VandaTrack, it was the largest day of retail net selling in the stock’s history. Retail generated approximately $855 million of turnover during the session, ending the day with $173.3 million of net selling.
The stock, however, moved sharply in the opposite direction.
PLTR closed at $162.66 on Tuesday, up 29.5% from Monday’s close of $125.65, after the company delivered a particularly strong set of second-quarter results and raised its full-year outlook. Palantir reported 93% year-on-year revenue growth, with especially strong expansion across its US commercial and government businesses.
At first glance, record retail selling alongside a near-30% rally might suggest that retail missed the move.
The Vanda view is more nuanced.
Retail investors haven't completely missed out, but they have become more tactical.
Throughout 2026, retail has repeatedly added to Palantir during periods of weakness and reduced exposure as the stock rallied. Tuesday’s record selling therefore looks less like a wholesale rejection of the company’s fundamentals and more like aggressive profit-taking into post-earnings strength.
The other side of the trade is equally important.
Over the past three sessions, institutional investors have recorded one of the strongest 3-day increases in net call buying of US single-stocks in Vanda’s data since 2017, ranking in the 98th percentile. Daily institutional flows have also moved back above their 21-day average, while CTAs have returned to buying after the S&P 500 cleared a key systematic trigger.
Those signals relate to the broader market rather than proving exactly who bought PLTR. Nevertheless, the stock’s ability to advance almost 30% while retail supplied substantial liquidity points to powerful demand from elsewhere in the market, including institutional, hedge-fund and systematic participants responding to the earnings surprise and improved fundamental outlook.
The setup now is clear:
Retail has used the rally to monetise gains. Professional and systematic demand appears to have driven the broader post-earnings repricing.
The question for today is whether that demand has further to run, or whether Tuesday captured most of the fundamental reset in a single session.
That is the dynamic Vanda is watching.
VandaTrack provides intraday retail-investor flow data at ten-minute intervals across all US-listed stocks and ETFs. Request access using the form below.