S&P 500 register

LII — S&P 500 index addition

Lennox International joined the S&P 500 at the close on Oct 1, 2024, replacing Catalent.

Register
S&P 500
Date announced
27 SEPT 2024
Date effective
01 OCT 2024
Replaces
Catalent
Sector
Industrials

Carried to each window

Measured from the effective-date close, and against the S&P 500

LII returns at each window after inclusion, absolute and relative to the index
WindowRun-up 30d1W1M3M6M1Y
LII+7.9%+0.8%+4.1%+4.1%-7.3%-11.4%
vs S&P 500Not yet elapsed+0.9%+4.4%+1.3%-5.4%-27.9%

Losses are entered in red. A blank cell means that window hasn't elapsed yet.

Analysis

Recorded outcomes for LII and comparable S&P 500 additions

Lennox International (LII) entered the S&P 500 at the close on Oct 1, 2024, replacing Catalent. The recorded announcement came 4 calendar days before the effective close, on Sep 27, 2024. The company is classified in Industrials in this dataset.

In the 30 calendar days leading into the effective close, LII moved +7.9%. The median 30-day run-up among the 25 S&P 500 entries with a recorded announcement and prices for that interval was +16.9%; this stock was 9.0 percentage points below that median. Measured from the effective close, LII returned 1W: +0.8% versus +0.3% for the 28-entry index median; 1M: +4.1% versus +2.2% for the 28-entry index median; 3M: +4.1% versus +5.2% for the 28-entry index median; 1Y: -11.4% versus +11.6% for the 24-entry index median. These figures do not measure movement from the announcement price.

At 1M, it ranks 9th of 28 measured S&P 500 additions and beat the benchmark by 4.4 percentage points. At 3M, it ranks 15th of 28 measured S&P 500 additions and beat the benchmark by 1.3 percentage points. At 1Y, it ranks 17th of 24 measured S&P 500 additions and lagged the benchmark by 27.9 percentage points. The other 3 Industrials additions with a measured 1M return averaged +9.8%. This is historical context, not a projection.

Around the effective date

Indexed performance, effective close = 100

Prices last updated: unknown

Other entries in the S&P 500 register

Same sector first, then the most recent

  • EMEEMCOR GroupSep 22, 2025
  • AMTMAmentum HoldingsNov 15, 2024
  • UALUnited Airlines HoldingsOct 1, 2024
  • HOODRobinhood MarketsSep 22, 2025
  • APPAppLovinSep 22, 2025
  • IBKRInteractive Brokers GroupAug 28, 2025

See every entry in the S&P 500 additions log or the index review calendar.