Pool Corp Dropped from S&P MidCap 400 to S&P SmallCap 600 June 22

POOL•2026-06-05

Pool Corp will be removed from the S&P MidCap 400 and added to the S&P SmallCap 600 effective June 22, 2026. The reshuffling follows Marvell and Flex’s promotions to the S&P 500, potentially prompting index‐fund rebalancing and trading‐volume shifts for Pool shares.

1. Index Reclassification Details

Pool Corp will be removed from the S&P MidCap 400 and officially added to the S&P SmallCap 600 before the opening bell on June 22, 2026. Marvell Technology and Flex will take its spot in the S&P 500, reflecting a tiered index migration by the provider.

2. Potential Impact on Pool Corp Shares

The shift to SmallCap 600 will trigger sales by MidCap 400 index funds and purchases by SmallCap 600 trackers. This automated rebalancing could generate temporary selling pressure and elevated trading volume for Pool Corp shares around the effective date.

Sources

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Finance

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Barrons

Pool Corp Dropped from S&P MidCap 400 to S&P SmallCap 600 June 22

1. Index Reclassification Details

2. Potential Impact on Pool Corp Shares

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