Fuel Tech, Inc. Files 8-K to Post Updated Corporate Presentation

What Happened
Fuel Tech, Inc. (FTEK) filed a Form 8-K on September 18, 2026 under Item 7.01 (Regulation FD Disclosure) to furnish an updated corporate presentation. The presentation is dated September 14, 2026 and has been posted on the company’s website; a copy is attached to the 8-K as Exhibit 99.1.

Key Details

• Filing date: September 18, 2026 (Form 8-K).
• Presentation date: September 14, 2026; attached as Exhibit 99.1 to the 8-K.
• Item reported: 7.01 (Regulation FD disclosure); the material was furnished (not filed).
• The 8-K also references the inclusion of the Inline XBRL cover page (Exhibit 104).

Why It Matters
This filing notifies investors that Fuel Tech has made updated corporate materials publicly available under Regulation FD. The furnished presentation may contain updated strategy, corporate information or highlights useful to shareholders; investors should review Exhibit 99.1 on the company website or the SEC filing to see any material updates. Because the presentation was furnished under Reg FD (rather than “filed”), the submission is intended to comply with fair disclosure rules and does not by itself amend prior financial statements.