Bloom Energy, Astera Labs, Reddit and Others Could Be Next in Line for S&P 500 Inclusion
Claire Weston
With Marvell and Flex just added to the S&P 500, *Barron's* identifies six companies most likely to join next; passive-fund forced buying drives a short-term pop, but staying power depends on fundamentals.
What does it take to get into the S&P 500?
Minimum market cap of $22.7 billion, U.S.-domiciled, listed on an eligible exchange.
Profitability gate: the most recent quarter and cumulative four-quarter earnings must both be positive under GAAP.
The company must be structured as common stock — limited partnerships (structures that pass profits directly to partners instead of paying dividends through common shares) are excluded.
In plain terms = big enough, profitable, and "standard" in structure — miss any one and you don't get in.
Who is most likely to join next?
According to *Barron's*, Bloom Energy, Astera Labs, Alnylam Pharmaceuticals, Heico, Rocket Companies, and Reddit are the largest-cap companies that meet the other admission criteria.
This means → the bigger a qualifying candidate's market cap, the higher its odds — these six are at the front of the queue.
In plain terms = they are already at the door; all that's left is for the index committee to knock.
Which big companies are still locked out?
Southern Peru Copper — roughly 90% of its equity is held by Mexico's Grupo Mexico, so it fails the U.S.-domicile requirement.
Spotify is incorporated outside the U.S.; Cloudflare and Snowflake missed the most recent quarter's GAAP profitability bar.
Enterprise Products and Energy Transfer are limited partnerships — structurally disqualified outright.
This reflects a key point: the S&P 500 is not a pure market-cap ranking — domicile, profitability, or corporate structure can each block a large-cap name.
Who might get kicked out?
Campbell's (soups and snacks) and Pool have already announced they will exit the S&P 500; both rank among the index's smallest constituents.
Conagra Brands, Mosaic, Molson Coors, and Builders FirstSource all carry market caps below $8 billion and face similar removal risk.
This means → the index door swings both ways: some queue to enter, others shrink their way out.
What does this mean for ordinary investors?
Constituent changes typically land during quarterly rebalances; passive-tracking funds must buy or sell, creating a direct short-term price driver.
Whether the move sticks depends on whether each company's fundamentals can support the new valuation level.
In plain terms = the stock may pop on inclusion day, but if earnings can't hold the weight, that pop eventually gives back.
Content is for reference only, not financial advice.