We recently published 10 Stocks Plunging Fast; 5 Now at All-Time Lows. Avantor Inc. (NYSE:AVTR) is one of the worst-performing stocks on Wednesday. Avantor extended its losing streak to a 4th straight day on Wednesday, losing 23.21 percent to close at $11.58 apiece after swinging to a steep loss in the third quarter of the year. In an updated report, Avantor Inc. (NYSE:AVTR) said it fell to a net loss of$711.8 million from a $57.8 million net income in the same period last year. Avantor (AVTR) Loses 23 ...