Let's take a look at the S&P500 stocks that are experiencing unusual volume in today's session.
By Mill Chart
Last update: May 16, 2025
Let's have a look at the S&P500 stocks with an unusual volume in today's session.
Top unusual volume stocks
| Ticker | Change | Comment |
|---|---|---|
| UNH | 3.04% | UNITEDHEALTH GROUP INC (NYSE:UNH) has an unusual volume of 37.01M shares. UNH is advancing 3.04% today. The average volume over the last 50 days is 11.11M, making today's volume 233.0% above the average. This signifies a notable change in market participation. Two days ago the company had a press release: UNH INVESTOR ALERT: Bronstein, Gewirtz & Grossman LLC Announces That UnitedHealth Group Incorporated Investors With Substantial Losses Have Opportunity to Lead Class Action Lawsuit. |
| NRG | 1.42% | The trading activity for NRG ENERGY INC (NYSE:NRG) has surged with a volume of 4.53M shares today. Shares in NRG are on the rise, with a gain of 1.42% observed in today's trading session. The average daily volume over 50 days is 3.36M, so this is 34.8% above the average volume. Yesterday the company had a press release: NRG Energy, Inc. Announces Redemption of Any and All Outstanding Convertible Senior Notes due 2048. |
| SMCI | 3.34% | SUPER MICRO COMPUTER INC's (NASDAQ:SMCI) traded a high volume of 70.35M shares. SMCI is experiencing an advancement of 3.34% in its share price today. The average daily volume over 50 days is 56.0M, so this is 25.62% above the average volume. |
| FI | 4.67% | With 6.32M shares traded so far, FISERV INC (NYSE:FI) is experiencing an unusual level of activity today. The market is favoring FI today, as its share price records a notable increase of 4.67%. The current trading volume is 48.15% above the average 50-day volume. This indicates a significant deviation from the average trading activity. |
| AMAT | -6.15% | APPLIED MATERIALS INC (NASDAQ:AMAT) has an unusual volume of 10.03M shares today. The price of AMAT is experiencing a downturn, with a decrease of 6.15%. With an average volume of 7.96M over the past 50 days, the current volume is 25.95% above the average. This deviation signals a potential shift in market dynamics. Yesterday the company had a press release: Applied Materials Announces Second Quarter 2025 Results. |
| CHTR | 0.93% | The stock of CHARTER COMMUNICATIONS INC-A (NASDAQ:CHTR) has caught attention with a significant volume of 2.53M shares today. Shares in CHTR are on the rise, with a gain of 0.93% observed in today's trading session. The average volume over the last 50 days is 1.45M, making today's volume 73.87% above the average. This signifies a notable change in market participation. Earlier today the company had a press release: CHTR Stock Alert: Halper Sadeh LLC Is Investigating Whether the Merger of Charter Communications, Inc. Is Fair to Shareholders. |
Our unusual volume stocks screener will show you the full list.
321.58
+5.69 (+1.8%)
42.77
-2.02 (-4.51%)
165.73
-0.21 (-0.13%)
159.68
-1.56 (-0.97%)
165.87
-3.27 (-1.93%)
423.49
+4.86 (+1.16%)
Find more stocks in the Stock Screener
UNH Latest News and Analysis
3 hours ago - ChartmillMarket Monitor News May 21 (Amer Sports, Astera Labs UP - Super Micro Computer DOWN)Wall Street Cools Off After Six-Day Rally
14 hours ago - ChartmillStay informed about the most active stocks in the S&P500 index on Tuesday's session.Looking for the most active S&P500 stocks in today's session? Join us as we dive into the US markets on Tuesday and discover the stocks that are dominating the trading activity and setting the pace for the market.
19 hours ago - ChartmillWhat's going on in today's pre-market session: S&P500 moversPre-market stock analysis of S&P500 stocks on 2025-05-20: top gainers and losers in today's session.
a day ago - ChartmillMarket Monitor News May 20 (United Health UP - Tesla DOWN)Markets Close Mixed Following Credit Downgrade, AI Moves, and Economic Concerns
2 days ago - ChartmillWhat's going on in today's session: S&P500 moversStay updated with the movements of the S&P500 index one hour before the close of the markets on Monday. Discover which stocks are leading as top gainers and losers in today's session.
2 days ago - ChartmillMonday's session: most active stock in the S&P500 indexCurious about the most active S&P500 stocks in today's session? Get insights into the stocks that are leading the way in terms of trading volume and market attention.
2 days ago - ChartmillUncover the latest developments among S&P500 stocks in today's session.Join us in exploring the top gainers and losers within the S&P500 index in the middle of the day on Monday as we examine the latest happenings in today's session.
5 days ago - ChartmillDiscover which S&P500 stocks are making waves on Friday.Let's delve into the developments on the US markets one hour before the close of the markets on Friday. Below, you'll find the top gainers and losers within the S&P500 index during today's session.
5 days ago - ChartmillExplore the S&P500 index on Friday and find out which stocks are the most active in today's session.Looking for the most active S&P500 stocks in today's session? Join us as we dive into the US markets on Friday and discover the stocks that are dominating the trading activity and setting the pace for the market.
5 days ago - ChartmillLet's take a look at the S&P500 stocks that are experiencing unusual volume in today's session.Let's have a look at the S&P500 stocks with an unusual volume in today's session.
5 days ago - ChartmillThese S&P500 stocks that are showing activity before the opening bell on Friday.The US market is yet to commence its session on Friday, but let's get a preview of the pre-market session and explore the top S&P500 gainers and losers driving the early market movements.
5 days ago - ChartmillMarket Monitor News May 16 ( Foot Locker, Boot Barn UP - United Health, Dick's Sporting Goods DOWN)Wall Street ends mixed as inflation cools, Deere beats expectations, Walmart warns on prices, and oil sinks on Iran deal hopes.
