Williamson Stephen 4

What Happened
Stephen Williamson, Senior Vice President and Chief Financial Officer of Thermo Fisher Scientific (TMO), was reported as acquiring 1,534 shares via a performance-based restricted stock unit (RSU) award on 2026-02-25. The Form 4 shows an acquisition at $0.00 per share (award grant, not a purchase). The compensation committee certified achievement of the underlying performance criteria on 2026-02-25.

Key Details

• Transaction type: A (award/grant of RSUs).
• Transaction date (period of report): 2026-02-25; Form 4 filed 2026-02-27 (timely).
• Shares involved: 1,534 RSUs acquired at $0.00 per share (award).
• Vesting: Award vests in three equal tranches on 2026-02-28, 2027-02-28 and 2028-02-28 (footnote F1). The first tranche vests three days after certification.
• Beneficial ownership: Reporting person disclaims direct beneficial ownership of the securities except to the extent of any pecuniary interest (footnote F2).
• Shares owned after transaction: Not specified in the provided filing excerpt.

Context
This was an award/vesting event (not an open-market buy or sale). RSU awards are compensation and may vest over time; they do not necessarily signal an immediate purchase decision by the insider. The filing indicates certification of performance metrics that triggered the RSU award and a standard multi-year vesting schedule.