Thermo Fisher Scientific Inc. officer Lisa P. Britt filed a Form 144 notice of proposed sale of 2,831 shares of common stock, with an approximate sale date of October 28, 2026, according to a filing submitted to the U.S. Securities and Exchange Commission.

Key Highlights

  • Proposed sale: Lisa P. Britt, an officer of Thermo Fisher Scientific Inc., intends to sell 2,831 shares of common stock.
  • Aggregate market value: The proposed shares carry an aggregate market value of $1,999,959.95, as stated in the filing.
  • Shares outstanding: The filing lists 369,747,286 shares of common stock outstanding.
  • Source of shares: The shares to be sold were acquired through restricted stock vesting from the issuer on five dates between February 23, 2021 and August 28, 2025, as compensation.
  • Recent prior sales: Britt sold 5,850 shares on August 6, 2026 for gross proceeds of $3,393,000.00 and 11,440 shares on August 19, 2026 for gross proceeds of $7,014,109.96.
  • Broker: The proposed sale is to be conducted through Fidelity Brokerage Services LLC, located at 900 Salem Street, Smithfield, RI 02917.
  • Exchange: The securities trade on NYSE:TMO.

Britt's Proposed Sale: Restricted Stock Origins and Recent Transaction History

According to the Form 144 filing dated October 28, 2026, Lisa P. Britt, identified as an officer of Thermo Fisher Scientific Inc. (NYSE:TMO), proposes to sell 2,831 shares of the company's common stock. The filing places the approximate date of sale on October 28, 2026, with Fidelity Brokerage Services LLC named as the executing broker. The aggregate market value of the proposed shares is listed as $1,999,959.95.

The filing details that the 2,831 shares were acquired in five separate restricted stock vesting transactions, all from the issuer and all classified as compensation. Specifically, 583 shares vested on February 23, 2021; 729 shares on February 25, 2021; 237 shares on February 26, 2021; 931 shares on February 28, 2025; and 351 shares on August 28, 2025. Each acquisition date also serves as the payment date, according to the filing.

The filing also discloses sales by Britt during the three months preceding the notice. On August 6, 2026, she sold 5,850 shares of common stock for gross proceeds of $3,393,000.00, and on August 19, 2026, she sold 11,440 shares for gross proceeds of $7,014,109.96. The filing was signed by Jennifer Ruchti as a duly authorized representative of Fidelity Brokerage Services LLC, acting as attorney-in-fact for Lisa Britt.

What Was Disclosed

Thermo Fisher Scientific officer Lisa P. Britt filed a Form 144 on October 28, 2026, notifying the SEC of a proposed sale of 2,831 common shares valued at $1,999,959.95, acquired through restricted stock vesting, with two additional sales totaling 17,290 shares disclosed for the prior three months.