William Blair Investment Management Boosts Twist Bioscience Holdings

Institutional investor increases stake in biotech firm by 6% in Q3 2025

Published on Mar. 2, 2026

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William Blair Investment Management LLC, a major institutional investor, increased its holdings in Twist Bioscience Corporation (NASDAQ:TWST) by 6% in the third quarter of 2025, according to a recent SEC filing. The firm now owns 4,142,283 shares of the biotech company's stock, representing a 6.86% ownership stake worth $116,564,000.

Why it matters

Twist Bioscience is a leading synthetic biology company that develops and commercializes DNA-based products and solutions. The increase in William Blair's stake suggests continued institutional investor confidence in the company's growth potential and technology platform.

The details

According to the filing, William Blair Investment Management purchased an additional 235,679 shares of Twist Bioscience in Q3 2025, bringing its total holdings to over 4.1 million shares. This represents a 6% increase in the firm's position. Twist Bioscience is a key holding for William Blair, accounting for 6.86% of its overall portfolio.

  • William Blair Investment Management increased its Twist Bioscience holdings in Q3 2025.

The players

William Blair Investment Management LLC

A major institutional investment firm that has increased its stake in Twist Bioscience Corporation.

Twist Bioscience Corporation

A synthetic biology company that develops and commercializes DNA-based products and solutions.

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The takeaway

The increase in William Blair's position in Twist Bioscience underscores the continued institutional investor confidence in the biotech firm's growth prospects and innovative DNA synthesis platform.