What's going on in today's pre-market session: S&P500 movers

Last update: May 20, 2025

Pre-market stock analysis of S&P500 stocks on 2025-05-20: top gainers and losers in today's session.

Gainers

Ticker	Change	Comment
LNT	4.52%	During Tuesday's pre-market session, ALLIANT ENERGY CORP (NASDAQ:LNT) experienced a 4.52% increase, with the stock price reaching $65.94. The stock is trading 26.31% higher than a year ago.
TMO	3.77%	THERMO FISHER SCIENTIFIC INC's (NYSE:TMO) shares rose 3.77% to $429.52 during Tuesday's pre-market session. In the last 3 months the stock lost 22.28%.
HPE	3.38%	HEWLETT PACKARD ENTERPRISE's (NYSE:HPE) stock price increased by 3.38% to $18.05. A press release (Hewlett Packard Enterprise Deepens Integration with NVIDIA on AI Factory Portfolio) was released yesterday.
UNH	2.69%	During Tuesday's pre-market session, UNITEDHEALTH GROUP INC (NYSE:UNH) exhibited strong growth, with the stock price climbing 2.69% to $324.39. Yesterday the company had a press release: UNITEDHEALTH GROUP INCORPORATED (NYSE: UNH) SHAREHOLDER ALERT Bernstein Liebhard LLP Reminds UnitedHealth Group Incorporated Investors of Upcoming Deadline.
EW	2.51%	EDWARDS LIFESCIENCES CORP's (NYSE:EW) shares rose 2.51% to $80.0.
HD	2.4%	HOME DEPOT INC (NYSE:HD) rose 2.4% to $388.5 during Tuesday's pre-market session. yesterday the company released their earnings.
CI	2.17%	Pre-market trading on Tuesday showed positive momentum for THE CIGNA GROUP (NYSE:CI), as the stock price advanced 2.17% to reach $328.95.

For the full premarket gainers list go to our premarket gainers page.

Today's pre-market losers

Ticker	Change	Comment
DE	-5.96%	DEERE & CO's (NYSE:DE) shares fell 5.96% to $498.25. The stock is trading 41.3% higher than a year ago.
GE	-5.73%	GENERAL ELECTRIC's (NYSE:GE) shares fell 5.73% to $221.81 during Tuesday's pre-market session. The stock is trading 31.93% higher than a month ago.
MCK	-5.23%	Investors observed a 5.23% decline in MCKESSON CORP's (NYSE:MCK) stock price, which now stands at $688.4 during Tuesday's pre-market session. In the last 3 months the stock gained 21.53%.
RMD	-4.09%	RESMED INC's (NYSE:RMD) shares fell 4.09% to $243.0. In the last month the share price increased with 20.15%.
IBM	-3.81%	The stock price of INTL BUSINESS MACHINES CORP (NYSE:IBM) is declining by 3.81%, reaching $258.19 during Tuesday's pre-market session. Shareholders saw the stock price going 20.38% higher is the past 6 months.
MCD	-3.55%	MCDONALD'S CORP's (NYSE:MCD) stock price decreased by 3.55% to $309.83. In the last year the stock gained 24.45%.
BSX	-3.29%	BOSTON SCIENTIFIC CORP's (NYSE:BSX) shares experienced a 3.29% decline, falling to $103.15 during Tuesday's pre-market session. Shareholders saw the stock price going 41.03% higher is the past year.
TJX	-3.22%	During Tuesday's pre-market session, the shares of TJX COMPANIES INC (NYSE:TJX) declined by 3.22%, reaching $130.68. TJX is releasing earnings today. In the last year the stock gained 32.2%.
HAS	-3.04%	HASBRO INC's (NASDAQ:HAS) shares fell 3.04% to $66.11 during Tuesday's pre-market session. Shareholders saw the stock price going 32.29% higher in the past month.
HON	-2.86%	The stock price of HONEYWELL INTERNATIONAL INC (NASDAQ:HON) is experiencing a decline of 2.86%, reaching $218.51 in today's pre-market session on Tuesday.

To see the full list of premarket losers you can use our premarket losers page.