Index history
S&P 500 changes in 2011
The S&P 500 saw 19 changes in 2011: 19 companies added and 19 removed. Dates and reasons for each change below — or browse every change since 1976.
Date
Added
Removed
Reason
- Dec 31, 2011
wpx
WPX Energy
cpwr
Compuware
Market capitalization changes - Dec 20, 2011
trip
TripAdvisor
tlab
Tellabs
Expedia spun off TripAdvisor. - Dec 16, 2011
bwa
BorgWarner
aks
AK Steel
Market capitalization changes - Dec 16, 2011
prgo
Perrigo
mww
Monster Worldwide
Market capitalization changes - Dec 16, 2011
wfr
MEMC Electronic Materials
Market capitalization changes - Dec 12, 2011
gas
AGL Resources.
gas
Nicor Gas
Nicor acquired by AGL, which retained the GAS ticker. - Nov 18, 2011
cbe
Cooper Industries
jns
Janus Capital Group
Janus Capital Group's market capitalization is less than $1.2 billion and is no longer representative of the large cap market space. - Oct 31, 2011
itt
ITT
Spun off from ITT Corp. - Oct 14, 2011
ceph
Cephalon
Acquired by Teva Pharmaceutical Industries (TEVA). - Sep 23, 2011
nsm
National Semiconductor
Acquired by Texas Instruments (TXN). - Jul 5, 2011
mi
Marshall & Ilsley
Marshall & Iisley is being bought by Bank of Montreal - Jun 30, 2011
rsh
RadioShack
Market capitalization adjustments. - Jun 1, 2011
anr
Alpha Natural Resources
mee
Massey Energy
Alpha Natural Resources acquired Massey Energy. - Apr 27, 2011
novl
Novell
Acquired by private equity firms. - Apr 1, 2011
genz
Genzyme
Acquired by Sanofi Aventis (SNY) - Mar 31, 2011Acquired by CenturyLink
- Feb 28, 2011
cov
Covidien
mfe
McAfee
Acquired by Intel - Feb 25, 2011
joyg
Joy Global
aye
Allegheny Energy
Acquired by First Energy (FE). - Jan 3, 2011
mmi
Motorola Mobility
mdp
Meredith Corp
S&P constituent Motorola spun off Motorola Mobility.
Get all S&P 500 logos
One-time payment. SVG, PNG, and a Figma library. Free updates as the index changes.