This article was automatically generated using Dow Jones technology.

Shares of small-cap companies were mixed Monday, as the Russell 2000 Index added 0.8%, and the S&P Small Cap 600 Index was unchanged.

Among companies with a market value of $1 billion to $6.7 billion, Definium Therapeutics Inc. was the best performer during the session, surging 50%, followed by Horizon Quantum Holdings Ltd., which jumped 20%. Oruka Therapeutics Inc. shares jumped 18%, WhiteFiber Inc. jumped 16%, and shares of Baldwin Insurance Group Inc. jumped 16%.

Butterfly Network Inc. was the biggest laggard, dropping 18%, followed by shares of Regencell Bioscience Holdings Ltd., which dropped 12%. Shares of Braiin Ltd. dropped 12%, Trulieve Cannabis Corp. shares plunged 9.7%, and WaterBridge Infrastructure LLC tumbled 9.7%.

Major stock indexes in the U.S. closed mixed Monday as the Nasdaq Composite Index fell 1.3%. Meanwhile, the S&P 500 Index dropped 0.4%, and the Dow Jones Industrial Average added 0.3%.

Data source: Dow Jones Market Data, FactSet

(END) Dow Jones Newswires

June 22, 2026 16:20 ET (20:20 GMT)

Copyright (c) 2026 Dow Jones & Company, Inc.