Bloom Energy, Everpure, and Illumina are set to join the S&P 500 as part of the index's quarterly rebalancing. The changes take effect before trading opens on Monday, September 21, 2026.

S&P Dow Jones Indices announced the reshuffle on Friday. The update reflects the index's goal of keeping each benchmark representative of its designated market-cap range. Quarterly rebalances are closely watched because S&P 500 membership is one of the most widely used benchmarks in U.S. markets, tracked by hundreds of billions of dollars in index funds and ETFs.

Who Is Coming In and Who Is Going Out

Bloom Energy, which makes fuel-cell systems for businesses and data centers, will replace Molson Coors Beverage. Molson Coors is the brewer behind Coors Light and Miller Lite. Bloom Energy's data-center focus places it among energy-technology suppliers drawing attention as computing infrastructure expands.

Everpure, a data-storage and data-management technology company, will replace The Trade Desk. The Trade Desk makes software that helps advertisers buy and manage digital ad campaigns.

Illumina, a maker of DNA-sequencing technology, will replace Builders FirstSource. Builders FirstSource supplies building materials to the U.S. residential construction industry. Illumina has long been one of the best-known names in genomics, and its return to the large-cap index restores a healthcare heavyweight to the benchmark.

All three departing companies will move to the S&P SmallCap 600. Everpure and Illumina are being promoted from the S&P MidCap 400 into the large-cap S&P 500.

The information technology and healthcare sectors each gained a member in this reshuffle. The consumer staples and communication services sectors each lost one.

S&P 100 Gets More Tech-Heavy

The S&P 100, which tracks some of the largest U.S. companies, is also changing. Dell Technologies, Palo Alto Networks, Arista Networks, and Sandisk will all join the index.

They replace Honeywell Aerospace, Nike, Simon Property Group, and Colgate-Palmolive. All four additions are information technology companies, while none of the departing names are.

This continues a broader trend of technology companies taking up more space at the top of the market. It also mirrors how index composition shifts alongside changes in which companies dominate U.S. equity market value.

When a stock is added to a major index, funds that track that index must buy shares to match the new composition. This can create buying pressure for incoming stocks and selling pressure for outgoing ones.

These trading effects often show up before the official effective date as investors anticipate the required moves. Inclusion in an index does not change a company's underlying business or earnings outlook.

What to watch next: how trading volumes behave around the September 21 effective date, and whether future rebalancings continue shifting the benchmarks' sector mix toward technology and healthcare.

Additional Rebalancing Moves

Other moves in this rebalancing include HubSpot, AGNC Investment, Corcept Therapeutics, and Brinker International joining the S&P MidCap 400.

Boston Beer and Capri Holdings will move from the S&P MidCap 400 to the S&P SmallCap 600.

The SmallCap 600 will also add Herc Holdings, Delek US Holdings, and others. S&P said the removed companies no longer represent the small-cap segment of the U.S. equity market.

All changes across the S&P 500, S&P 100, S&P MidCap 400, and S&P SmallCap 600 take effect before the market opens on September 21, 2026.

Source: CoinCentral