Should You Buy Bloom Energy Stock Before It Joins the S&P 500 on Sept. 21?

Key Points Bloom Energy joins the S&P 500 before the market opens on Monday, Sept. 21. Management has raised its 2026 revenue guidance twice this year and now expects about 100% growth. The price pop that once came with joining the index has mostly disappeared, research suggests. 10 stocks we like better than Bloom Energy › Bloom Energy (NYSE:BE) is joining the S&P 500 (SNPINDEX:^GSPC) . S&P Dow Jones Indices made it official earlier this month: The fuel cell maker enters the index before the market opens on Monday, Sept. 21. The move caps an exceptional year for Bloom, whose systems generate electricity on-site for data centers and other major power users.