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Which companies added to S&P 500 in Q4 2026?

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EventPOLYMARKET

Which companies added to S&P 500 in Q4 2026?

Which companies added to S&P 500 in Q4 2026?
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Vol

$14.6K

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Markets

12

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Market snapshot: Oct 29, 2026, 12:00 PM UTC. Prices may have changed.

Market Price Graph

12 markets tracked

Will Okta (OKTA) be added to the S&P 500 by December 31, 2026?

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All Markets(12)
MarketOutcome price
Will Okta (OKTA) be added to the S&P 500 by December 31, 2026?
Yes 51.0%
Will Cheniere Energy (LNG) be added to the S&P 500 by December 31, 2026?
Yes 42.5%
Will Credo Technology (CRDO) be added to the S&P 500 by December 31, 2026?
Yes 24.0%
Will Astera Labs (ALAB) be added to the S&P 500 by December 31, 2026?
Yes 18.0%
Will Alnylam Pharmaceuticals (ALNY) be added to the S&P 500 by December 31, 2026?
Yes 15.0%

Event Overview

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).

Market Resolution RulesSame rules for all markets

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).

Saved descriptions match across 12 contracts. Check each contract on the provider for its full terms.

Important Notes

  • Markets resolve based on official data sources specified in the rules
  • Resolution may be delayed if official data is not immediately available
  • Polymarket uses UMA protocol for dispute resolution when necessary
  • Always verify the exact resolution criteria before trading
View full terms on Polymarket

Markets (12)

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POLYMARKETTech
Will Okta (OKTA) be added to the S&P 500 by December 31, 2026?

Will Okta (OKTA) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome51.0%
Yes
Volume$878.61
Liquidity$208
End DateJan 01, 2027
View Details
POLYMARKETTech
Will Cheniere Energy (LNG) be added to the S&P 500 by December 31, 2026?

Will Cheniere Energy (LNG) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome42.5%
Yes
Volume$1.7K
Liquidity$789
End DateJan 01, 2027
View Details
POLYMARKETTech
Will Credo Technology (CRDO) be added to the S&P 500 by December 31, 2026?

Will Credo Technology (CRDO) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome24.0%
Yes
Volume$1.6K
Liquidity$104
End DateJan 01, 2027
View Details
POLYMARKETTech
Will Astera Labs (ALAB) be added to the S&P 500 by December 31, 2026?

Will Astera Labs (ALAB) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome18.0%
Yes
Volume$674.88
Liquidity$105
End DateJan 01, 2027
View Details
POLYMARKETTech
Will Alnylam Pharmaceuticals (ALNY) be added to the S&P 500 by December 31, 2026?

Will Alnylam Pharmaceuticals (ALNY) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome15.0%
Yes
Volume$1.5K
Liquidity$209
End DateJan 01, 2027
View Details
POLYMARKETTech
Will HEICO (HEI) be added to the S&P 500 by December 31, 2026?

Will HEICO (HEI) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome12.0%
Yes
Volume$564.32
Liquidity$625
End DateJan 01, 2027
View Details
POLYMARKETTech
Will SoFi Technologies (SOFI) be added to the S&P 500 by December 31, 2026?

Will SoFi Technologies (SOFI) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome11.0%
Yes
Volume$1.8K
Liquidity$113
End DateJan 01, 2027
View Details
POLYMARKETTech
Will MongoDB (MDB) be added to the S&P 500 by December 31, 2026?

Will MongoDB (MDB) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome10.5%
Yes
Volume$453.49
Liquidity$239
End DateJan 01, 2027
View Details
POLYMARKETTech
Will Rocket Companies (RKT) be added to the S&P 500 by December 31, 2026?

Will Rocket Companies (RKT) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome10.0%
Yes
Volume$1.7K
Liquidity$252
End DateJan 01, 2027
View Details
POLYMARKETTech
Will Medline (MDLN) be added to the S&P 500 by December 31, 2026?

Will Medline (MDLN) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome6.3%
Yes
Volume$1.2K
Liquidity$474
End DateJan 01, 2027
View Details
POLYMARKETTech
Will Affirm Holdings (AFRM) be added to the S&P 500 by December 31, 2026?

Will Affirm Holdings (AFRM) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome6.0%
Yes
Volume$989.93
Liquidity$452
End DateJan 01, 2027
View Details
POLYMARKETTech
Will Strategy (MicroStrategy) (MSTR) be added to the S&P 500 by December 31, 2026?

Will Strategy (MicroStrategy) (MSTR) be added to the S&P 500 by December 31, 2026?

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).

LiquidityLOW
Yes outcome2.2%
Yes
Volume$1.7K
Liquidity$1.3K
End DateJan 01, 2027
View Details

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