Which companies added to S&P 500 in Q4 2026?
As of Wed, 28 Oct 2026 10:56:57 UTC, Polymarket traders price Astera Labs (ALAB) (28.5%), Credo Technology (CRDO) (28.5%), Cheniere Energy (LNG) (25.5%). The market has $8K in volume and closes on Fri, 01 Jan 2027.
Updated:
Current odds
| Outcome | Chance | Yes price | No price |
|---|---|---|---|
| Astera Labs (ALAB) | 28.5% | 28.5¢ | 71.5¢ |
| Credo Technology (CRDO) | 28.5% | 28.5¢ | 71.5¢ |
| Cheniere Energy (LNG) | 25.5% | 25.5¢ | 74.5¢ |
| Affirm Holdings (AFRM) | 25.0% | 25.0¢ | 75.0¢ |
| Okta (OKTA) | 20.5% | 20.5¢ | 79.5¢ |
| Alnylam Pharmaceuticals (ALNY) | 20.5% | 20.5¢ | 79.5¢ |
| HEICO (HEI) | 17.0% | 17.0¢ | 83.0¢ |
| Medline (MDLN) | 15.0% | 15.0¢ | 85.0¢ |
| MongoDB (MDB) | 14.0% | 14.0¢ | 86.0¢ |
| SoFi Technologies (SOFI) | 12.5% | 12.5¢ | 87.5¢ |
| Rocket Companies (RKT) | 12.5% | 12.5¢ | 87.5¢ |
| Strategy (MicroStrategy) (MSTR) | 4.0% | 4.0¢ | 96.0¢ |
Market details
- Venue: Polymarket
- Volume: $8K
- Liquidity: $6K
- Closes:
Resolution rules
The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026. This market will resolve to "Yes" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No." To qualify, the listed ticker must match the announced ticker added to the index. An announcement from S&P will qualify for a "Yes" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date. The primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).
Sources
Related markets
- Largest Company end of December 2026?
- Which CEOs will be out before 2027?
- Largest Company end of October 2026?
- What will S&P 500 (SPX) hit by end of December?
- Largest IPO by market cap in 2026?
- IPOs before 2027?
DOXA is a liquidity aggregator for prediction markets that compares odds and depth across Polymarket, Kalshi and others and routes each trade for best execution with an AI assistant.