These S&P500 stocks have an unusual volume in today's session

Last update: May 13, 2025

Let's take a closer look at the S&P500 stocks with an unusual volume in today's session on Tuesday. Stay informed about the market activity below.

Today's unusual volume stocks

Ticker	Change	Comment
ENPH	-5.42%	So far 11.65M shares of ENPHASE ENERGY INC (NASDAQ:ENPH) have traded in today's session. The share price experienced a decrease of 5.42%. The average daily volume over 50 days is 4.93M, so this is 136.0% above the average volume.
LNT	0.25%	ALLIANT ENERGY CORP's (NASDAQ:LNT) traded a high volume of 2.73M shares. The market is favoring LNT today, as its share price records a notable increase of 0.25%. Compared to the average daily volume of the past 50 days, the current volume is 25.06% above, suggesting an unusual level of trading activity. Yesterday the company had a press release: Alliant Energy Prices Offering of $500 Million of 3.250% Convertible Senior Notes due 2028.
BLDR	6.15%	Today's trading session witnessed an unusual volume of 2.18M shares for BUILDERS FIRSTSOURCE INC (NYSE:BLDR). The market is favoring BLDR today, as its share price records a notable increase of 6.15%. The average volume over the last 50 days is 1.79M, making today's volume 21.31% above the average. This signifies a notable change in market participation.
FSLR	21.62%	FIRST SOLAR INC's (NASDAQ:FSLR) traded a high volume of 13.08M shares. The market is favoring FSLR today, as its share price records a notable increase of 21.62%. In comparison to the average daily volume of the last 50 days, the current volume is 233.0% above. This suggests a notable change in trading activity.
DVA	-1.6%	The trading volume of DAVITA INC (NYSE:DVA) today is 1.14M shares, which is considered unusual. DVA is experiencing a downward trend, with a decline of 1.6%. In comparison to the average daily volume of the last 50 days, the current volume is 29.73% above. This suggests a notable change in trading activity.
UNH	-15.99%	UNITEDHEALTH GROUP INC (NYSE:UNH) has an unusual volume of 34.3M shares today. This decline in share price leads to a decrease of 15.99%. In comparison to the average daily volume of the last 50 days, the current volume is 391.0% above. This suggests a notable change in trading activity. Earlier today the company had a press release: INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in UnitedHealth Group Incorporated of Class Action Lawsuit and Upcoming Deadlines - UNH.
PSX	5.57%	The trading activity for PHILLIPS 66 (NYSE:PSX) has surged with a volume of 8.0M shares today. Investors in PSX are enjoying a price surge of 5.57% today, indicating bullish market sentiment. This volume is 135.0% above the average 50 day volume. Earlier today the company had a press release: Phillips 66 Issues Statement Following Glass Lewis and ISS Reports.