Fuel Tech, Inc. (FTEK) Institutional Ownership

Ownership Summary

Fuel Tech, Inc. (NASDAQ:FTEK) appears in 45 institutional 13F filings for the quarter ending December 2025.

• Collectively, these holders controlled 24.2% of Fuel Tech's outstanding shares in December 2025, up from 22.7% in September 2025.
• They increased total shares held in Fuel Tech by 22.2% from the prior quarter, while the number of investors in FTEK increased 15.38% year over year.
• Of these 45 holders, 22 added to their stakes in Fuel Tech, 11 trimmed positions, and 12 made no changes.
• Altogether, these fund groups held 7.57Mn shares in FTEK by December 2025, up by 1.37Mn shares quarter on quarter, and up 600.74K shares year over year.
• As of December 31, 2025, the biggest holder of Fuel Tech is GRACE & WHITE INC /NY at 1.54Mn shares, representing 4.93% of shares outstanding.
• Leading buyers of Fuel Tech shares for the quarter ending December 2025 were VANGUARD CAPITAL MANAGEMENT LLC (988.0K), RENAISSANCE TECHNOLOGIES LLC (259.81K), GSA CAPITAL PARTNERS LLP (214.24K), VANGUARD FIDUCIARY TRUST CO (132.5K), Peapod Lane Capital LLC (119.2K).
• The biggest sellers of Fuel Tech for the quarter ending December 2025 included CITADEL ADVISORS LLC (282.62K), JANE STREET GROUP, LLC (189.98K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (97.88K), XTX Topco Ltd (60.06K), MARSHALL WACE, LLP (59.24K).
• Business Quant data shows the 10 biggest positions in Fuel Tech as of December 2025 are held by GRACE & WHITE INC /NY (1.54Mn), RENAISSANCE TECHNOLOGIES LLC (1.41Mn), VANGUARD CAPITAL MANAGEMENT LLC (988.0K), GEODE CAPITAL MANAGEMENT, LLC (532.81K), Peapod Lane Capital LLC (478.84K), BlackRock, Inc. (410.36K), Us Bancorp \De\ (304.78K), GSA CAPITAL PARTNERS LLP (246.25K), TWO SIGMA INVESTMENTS, LP (238.08K), CITADEL ADVISORS LLC (221.4K).