Three constituent changes disclosed by S&P Dow Jones Indices on July 20, 2026, will alter both the S&P MidCap 400 and the S&P SmallCap 600. Krystal Biotech Inc. (NASD: KRYS), a current S&P SmallCap 600 member, is set to replace Taylor Morrison Home Corp. (NYSE: TMHC) in the MidCap 400. Tutor Perini and V2X will each enter the SmallCap 600.
The MidCap 400 change
Krystal Biotech's move is a direct tier promotion, from the SmallCap 600 to the MidCap 400. Taylor Morrison Home Corp. (NYSE: TMHC) exits to create the slot. Krystal Biotech trades on the Nasdaq under KRYS.
The exit connects the two parts of the announcement. Krystal Biotech leaves a vacancy in the SmallCap 600, and the smaller index picks up two names in return.
SmallCap 600 additions
Tutor Perini and V2X are the two companies named as incoming S&P SmallCap 600 members. S&P Dow Jones Indices issued the announcement from New York on July 20, 2026. All three changes are described as forthcoming. No effective date appeared in the disclosed announcement text.