Vicor to Join S&P MidCap 400, Exit S&P SmallCap 600 on March 23
Vicor Corp will be added to the S&P MidCap 400 and removed from the S&P SmallCap 600 effective March 23, 2026. The index rebalancing aligns Vicor with its market-capitalization peers and may increase passive fund demand.
1. Index Reconstitution Details
Effective before trading on March 23, 2026, Vicor Corp will be removed from the S&P SmallCap 600 and added to the S&P MidCap 400 as part of the quarterly index rebalance. This shift reflects Vicor’s market capitalization growth and repositions the company among larger industrial peers within a mid-cap benchmark.
2. Potential Market Impact
Inclusion in the S&P MidCap 400 may attract additional passive investment flows as index-tracking funds adjust holdings, potentially boosting trading volume and liquidity for Vicor shares. Conversely, removal from the SmallCap 600 could trigger outflows from small-cap mandates, making net fund demand a key factor to monitor.