Next S&P 500 weight rebalance — September 2026
Additions can happen any time a member is removed. The quarterly reconstitution — third Friday of March, June, September, and December — re-weights the index.
Est. announcement ≈ Sep 11, 2026 (estimated — ~5 trading days before)
Likely next S&P 500 additions
Eligibility screen — updated Aug 4, 2026. Ranked by market cap among companies not yet in the index.
| 1 | ENBEnbridge Inc. | Strong candidate | Energy Sector under-weight | $118B | 100% |
| 2 | MELIMercadoLibre, Inc. | Strong candidate | Consumer Cyclical | $96.3B | 93% |
| 3 | BEBloom Energy Corporation | Strong candidate | Industrials Sector under-weight | $64.3B | 94% |
| 4 | CLSCelestica Inc. | Strong candidate | Technology Sector over-weight | $39.3B | 99% |
| 5 | ILMNIllumina, Inc. | Strong candidate | Healthcare | $30B | 98% |
| 6 | TWLOTwilio Inc. | Strong candidate | Technology Sector over-weight | $29.8B | 100% |
| 7 | RDDTReddit, Inc. | Strong candidate | Communication Services Sector over-weight | $29.8B | 88% |
| 8 | ALNYAlnylam Pharmaceuticals, Inc. | Strong candidate | Healthcare | $29.5B | 100% |
| 9 | ZMZoom Communications, Inc. | Strong candidate | Technology Sector over-weight | $28.8B | 90% |
| 10 | AFRMAffirm Holdings, Inc. | Strong candidate | Financial Services Sector over-weight | $25.3B | 84% |
| 11 | OKTAOkta, Inc. | On the bubble | Technology Sector over-weight | $23.5B | 100% |
| 12 | MKLMarkel Corporation | On the bubble | Financial Services Sector over-weight | $23.3B | 98% |
| 13 | SOFISoFi Technologies, Inc. | On the bubble | Financial Services Sector over-weight | $23.1B | 98% |
- 1ENBEnbridge Inc.Strong candidate
- 2MELIMercadoLibre, Inc.Strong candidate
- 3BEBloom Energy CorporationStrong candidate
- 4CLSCelestica Inc.Strong candidate
- 5ILMNIllumina, Inc.Strong candidate
- 6TWLOTwilio Inc.Strong candidate
- 7RDDTReddit, Inc.Strong candidate
- 8ALNYAlnylam Pharmaceuticals, Inc.Strong candidate
- 9ZMZoom Communications, Inc.Strong candidate
- 10AFRMAffirm Holdings, Inc.Strong candidate
- 11OKTAOkta, Inc.On the bubble
- 12MKLMarkel CorporationOn the bubble
- 13SOFISoFi Technologies, Inc.On the bubble
What this screen checks
Every company listed above passes each of these eligibility rules. Meeting them is necessary — never sufficient.
- U.S.-domiciled operating company (incl. foreign-incorporated 10-K filers S&P treats as U.S.)
- Common stock, equity REIT, or BDC — no ETFs, ADRs, MLPs, or SPACs
- Market cap at or above the published threshold (≈$22.7B, as of 2025-07-01)
- Public float of more than 50% of shares outstanding
- Positive GAAP earnings — most recent quarter and trailing four quarters combined
- At least 12 months since its IPO (screen heuristic)
- ≥250k shares traded in each of the prior 6 months
Public float is enforced here: a company whose public float is below 50% of shares outstanding is excluded, even if it clears every other rule. Where free float is not yet available it shows as “Float unverified” and the company is listed but not confirmed against this rule. The float-adjusted liquidity ratio remains part of the official rules but is not yet evaluated here.
See the full record of past changes on the S&P 500additions & removals page, or read the screen methodology.