Rathbones Group Reduces Stake in Thermo Fisher Scientific

Institutional investor trims position in medical research giant

Apr. 6, 2026 at 11:14am

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Rathbones Group PLC, a major institutional investor, decreased its stake in Thermo Fisher Scientific Inc. (NYSE:TMO) by 1.7% in the fourth quarter, according to a recent SEC filing. The firm now owns approximately 926,733 shares of the medical research company's stock, making it Thermo Fisher's 10th largest shareholder.

Why it matters

Thermo Fisher Scientific is a leading provider of scientific instruments, reagents, and services to research, clinical, and industrial labs worldwide. Changes in major institutional holdings can signal shifts in investor sentiment and market expectations around the company's performance.

The details

According to the 13F filing, Rathbones Group sold 15,658 shares of Thermo Fisher Scientific during the fourth quarter. The firm now owns about 0.25% of the company's outstanding shares, valued at nearly $537 million as of the end of 2025. Thermo Fisher Scientific's stock price has fluctuated in recent months amid broader market volatility, closing at $492.90 per share on Monday.

  • Rathbones Group filed its 13F report for the fourth quarter of 2025 on April 6, 2026.
  • The firm decreased its Thermo Fisher Scientific stake during the three-month period ending December 31, 2025.

The players

Rathbones Group PLC

A major institutional investor and asset management firm based in the United Kingdom.

Thermo Fisher Scientific Inc.

A global provider of scientific instrumentation, reagents, software, and services for research, clinical, and industrial laboratories.

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The takeaway

This filing highlights the ongoing shifts in institutional ownership around Thermo Fisher Scientific, a bellwether for the broader life sciences and medical research industries. While Rathbones trimmed its position, the company remains a top-10 shareholder, signaling continued confidence in Thermo Fisher's long-term prospects.