Illumina (NASDAQ: ILMN) will join the S&P 500 on 21 September 2026, alongside Bloom Energy (NYSE: BE) and Everpure (NYSE: P), S&P Dow Jones Indices said on 4 September 2026.
The three additions replace Molson Coors Beverage (NYSE: TAP), The Trade Desk (NASDAQ: TTD) and Builders FirstSource (NYSE: BLDR), which drop to the S&P SmallCap 600. The change takes effect prior to the open of trading on 21 September, timed to the quarterly rebalance.
Shares rise in after-hours trade
All three stocks gained in extended trading after the announcement. Bloom Energy led, rising as much as 7.5% after hours according to Investing.com, though Seeking Alpha put the move at 6.2%. Illumina added roughly 2% and Everpure gained about 2.2%, the same Investing.com report said.
Illumina closed the regular session at $220.01, up 0.77% on the day and up 14.9% over the prior 20 trading sessions, having traded as high as $231.57 and as low as $187.75 in that window.
Everpure’s hidden rebrand
Everpure is not a new listing. The company was known as Pure Storage before a 2026 name change, meaning long-time holders of the data-storage group are the ones getting the S&P 500 promotion rather than a fresh entrant. Both Everpure and Illumina will also be removed from the S&P MidCap 400 as part of the same reshuffle, Investing.com reported.
The rebalance extends beyond the headline three names. Dell Technologies, Palo Alto Networks, Arista Networks and Sandisk are set to join the S&P 100 in the same reshuffle, while Nike, Honeywell Aerospace, Simon Property Group and Colgate-Palmolive exit it. HubSpot, AGNC Investment, Corcept Therapeutics and Brinker International are being promoted into the S&P MidCap 400.
Illumina’s numbers behind the promotion
Illumina’s inclusion follows a run of improving results after a difficult 2024. The gene-sequencing group reported revenue of $1,159m for the quarter ended 28 June 2026, up from $1,059m in the same quarter a year earlier, according to its 10-Q filing with the SEC.
Diluted earnings per share for that quarter came to $1.35, against a loss of $12.48 a share in the same quarter two fiscal years earlier, when the company was absorbing costs tied to its GRAIL divestiture. Illumina also lifted its full-year revenue guidance above analyst estimates in its July earnings report, briefs.co reported.
Separately, Illumina director Keith Meister filed a Form 4 with the SEC on 4 September, the same day the index news broke. The filing did not disclose share figures. Daily short-sale activity in the stock showed no unusual spike in the fortnight before the announcement, with FINRA’s short-sale ratio ranging between 0.394 and 0.818 across the ten sessions to 4 September.
Bloom Energy’s AI-driven run
Bloom Energy’s inclusion caps a striking rally. The fuel-cell maker, which generates electricity from natural gas and has become a beneficiary of surging AI data-centre power demand, had climbed more than 191% over the prior year even before the index news, according to BigGo Finance.
The additions land against a broadly stable backdrop for US rates. The 10-year Treasury yield stood at 4.77% on 3 September, barely changed from 4.79% previously, while the unemployment rate held at 4.1% in August, Federal Reserve data show. Index-fund flows tied to the rebalance will be the immediate technical driver for the three stocks between now and the 21 September effective date, when passive trackers must adjust their holdings to match the new index composition.
This article is for information only and is not investment advice or a recommendation to buy or sell any asset. Markets move quickly; figures are correct as sourced at the time of writing. Always do your own research before making financial decisions.
