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Events / Business / S&P Index Rebalancing: Allison,...
Business index rebalancing

S&P Index Rebalancing: Allison, Goodyear, Stellar

Analysis based on 6 articles · First reported Jun 30, 2026 · Last updated Jun 30, 2026

Sentiment
10
Attention
3
Articles
6
Market Impact
General
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Market Impact

The rebalancing of the S&P MidCap 400 and S&P SmallCap 600 indices will lead to shifts in investor portfolios as funds tracking these indices adjust their holdings. Allison Transmission Holdings Inc. may see increased investor interest, while Goodyear Tire & Rubber Co. and Stellar Bancorp Inc. will experience changes in their index exposure.

Financial services Automotive Banking
Event Summary

S&P Dow Jones Indices announced changes to the S&P MidCap 400 and S&P SmallCap 600 indices, effective prior to the opening of trading on Monday, July 6. Allison Transmission Holdings Inc. will replace Goodyear Tire & Rubber Co. in the S&P MidCap 400. Concurrently, Goodyear Tire & Rubber Co. will replace Stellar Bancorp Inc. in the S&P SmallCap 600. These changes are partly due to Prosperity Bancshares Inc.'s acquisition of Stellar Bancorp Inc., which is expected to close on July 1.

Key Actions
100 S&P Dow Jones Indices announced changes
95 Allison Transmission will join S&P 400
95 Goodyear Tire and Rubber Company will replace S&P 600
90 Goodyear Tire and Rubber Company will be replaced S&P 400
90 Stellar Bancorp will be replaced S&P 600
85 Prosperity Bancshares is acquiring Stellar Bancorp
Entities Involved
index
S&P 600
The S&P SmallCap 600 will have Goodyear Tire & Rubber Co. added and Stellar Bancorp Inc. removed during its rebalancing.
Importance 100.0 Sentiment 0.0
index
S&P 400
The S&P MidCap 400 will see Allison Transmission Holdings Inc. added and Goodyear Tire & Rubber Co. removed as part of its rebalancing.
Importance 100.0 Sentiment 0.0
stock
Allison Transmission
Allison Transmission Holdings Inc. will be added to the S&P MidCap 400, which is generally seen as a positive development for the company's visibility and investor interest.
Importance 90.0 Sentiment 20.0
stock
Goodyear Tire and Rubber Company
Goodyear Tire & Rubber Co. will be removed from the S&P MidCap 400 and added to the S&P SmallCap 600, indicating a shift in its market capitalization classification.
Importance 90.0 Sentiment 0.0
stock
Stellar Bancorp
Stellar Bancorp Inc. will be removed from the S&P SmallCap 600 due to its acquisition by Prosperity Bancshares Inc.
Importance 80.0 Sentiment 0.0
stock
Prosperity Bancshares
Prosperity Bancshares Inc. is acquiring Stellar Bancorp Inc., which is the reason for Stellar Bancorp's removal from the S&P SmallCap 600.
Importance 70.0 Sentiment 10.0
index
S&P Dow Jones Indices
S&P Dow Jones Indices is responsible for announcing and implementing the index changes.
Importance 60.0 Sentiment 0.0
stock
WSP Global
S&P Global is the parent company of S&P Dow Jones Indices, which oversees the index rebalancing.
Importance 50.0 Sentiment 0.0
Relationships
S&P 600 related ↔ S&P Dow Jones Indices
S&P 600 related ↔ WSP Global
S&P 400 related ↔ S&P Dow Jones Indices
S&P 400 related ↔ WSP Global
S&P Dow Jones Indices related ↔ WSP Global
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