FUEL TECH INC FTEK
COM · Common Stock · CUSIP 359523107
- SectorIndustrials
- IndustryIndustrial & Commercial Fans & Blowers & Air Purifing Equip
- HeadquartersWarrenville, IL
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 31.1m as of 2025-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $2.52. Options: 4 managers hold calls ($35.8k notional), 2 hold puts ($310.5k).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 37 |
| Q4 2022 | 42 |
| Q1 2023 | 38 |
| Q2 2023 | 41 |
| Q3 2023 | 39 |
| Q4 2023 | 37 |
| Q1 2024 | 34 |
| Q2 2024 | 35 |
| Q3 2024 | 37 |
| Q4 2024 | 40 |
| Q1 2025 | 36 |
| Q2 2025 | 37 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 10 | 17 |
| Q4 2023 | 14 | 15 |
| Q1 2024 | 10 | 13 |
| Q2 2024 | 12 | 10 |
| Q3 2024 | 16 | 7 |
| Q4 2024 | 16 | 9 |
| Q1 2025 | 15 | 16 |
| Q2 2025 | 15 | 16 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $29.8k | $10.5k | 0.35 |
| Q4 2024 | $85.6k | $735 | 0.01 |
| Q1 2025 | $46.8k | $11.6k | 0.25 |
| Q2 2025 | $35.8k | $310.5k | 8.68 |
Biggest buyers
| Informed Momentum Co LLC | New | +283.9k |
| INTEGRITY WEALTH ADVISORS, INC. | New | +70.0k |
| UBS Group AG | Added | +25.5k |
| MARSHALL WACE, LLP | New | +25.1k |
| SIMPLEX TRADING, LLC | Added | +21.7k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +17.8k |
| HRT FINANCIAL LP | New | +15.1k |
| Advisory Services Network, LLC | New | +15.0k |
| CORSAIR CAPITAL MANAGEMENT, L.P. | New | +10.0k |
| STATE STREET CORP | Added | +1.6k |
Biggest sellers
| Peapod Lane Capital LLC | Reduced | -313.6k |
| GRACE & WHITE INC /NY | Reduced | -264.6k |
| CITADEL ADVISORS LLC | Reduced | -144.2k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -104.3k |
| GSA CAPITAL PARTNERS LLP | Sold out | -79.2k |
| BlackRock, Inc. | Reduced | -52.7k |
| ESSEX INVESTMENT MANAGEMENT CO LLC | Reduced | -47.0k |
| GROUP ONE TRADING LLC | Sold out | -17.6k |
| XTX Topco Ltd | Sold out | -16.6k |
| Legato Capital Management LLC | Reduced | -12.2k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $31.2k12.4k shares |
| GROUP ONE TRADING LLC | Added | $4.5k1.8k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| SIMPLEX TRADING, LLC | Added | $0200 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $310.5k123.2k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
No one currently above 5% in the filings since 19 Dec 2024.
Fell to 5% or below in the last year: GRACE & WHITE INC /NY (4.9%, 2026-10-07)
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2023 | 1 | $18.0k | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 3 | $50.0k | 0 | — | — |
| Q4 2024 | 1 | $50.1k | 0 | — | — |
| Q1 2025 | 1 | $15.8k | 0 | — | — |
| Q2 2025 | 0 | — | 1 | $21.1k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-06-04 | Jones Sharon L Director | Sold | $21.1k12.6k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| GRACE & WHITE INC /NY 0.75% of their portfolio | 1.6m $4.1m | Reduced -264.6k |
| VANGUARD GROUP INC 0.00% of their portfolio | 941.0k $2.4m | Unchanged |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 852.4k $2.1m | Reduced -104.3k |
| Peapod Lane Capital LLC 1.68% of their portfolio | 667.5k $1.7m | Reduced -313.6k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 517.7k $1.3m | Added +17.8k |
| BlackRock, Inc. 0.00% of their portfolio | 411.0k $1.0m | Reduced -52.7k |
| US BANCORP \DE\ 0.00% of their portfolio | 304.8k $768.0k | Unchanged |
| Informed Momentum Co LLC 0.11% of their portfolio | 283.9k $715.5k | New |
| STATE STREET CORP 0.00% of their portfolio | 97.0k $244.6k | Added +1.6k |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.04% of their portfolio | 77.2k $194.7k | Reduced -47.0k |
| INTEGRITY WEALTH ADVISORS, INC. 0.12% of their portfolio | 70.0k $176.4k | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 36.8k $92.8k | Unchanged |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 30.1k $75.9k | Reduced -144.2k |
| UBS Group AG 0.00% of their portfolio | 27.4k $69.2k | Added +25.5k |
| Cresset Asset Management, LLC 0.00% of their portfolio | 25.5k $64.3k | Unchanged |
| MARSHALL WACE, LLP 0.00% of their portfolio | 25.1k $63.2k | New |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 22.9k $57.0k | Added +21.7k |
| Founders Capital Management 0.03% of their portfolio | 20.0k $50.4k | Unchanged |
| Legato Capital Management LLC 0.01% of their portfolio | 18.2k $45.8k | Reduced -12.2k |
| HRT FINANCIAL LP 0.00% of their portfolio | 15.1k $38.0k | New |
| Advisory Services Network, LLC 0.00% of their portfolio | 15.0k $39.8k | New |
| LexAurum Advisors, LLC 0.00% of their portfolio | 11.8k $29.9k | Unchanged |
| HighTower Advisors, LLC 0.00% of their portfolio | 10.4k $26.2k | Reduced -100 |
| CORSAIR CAPITAL MANAGEMENT, L.P. 0.00% of their portfolio | 10.0k $25.2k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 3.6k $9.2k | Added +450 |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 2.0k $5.0k | Unchanged |
| New England Capital Financial Advisors LLC 0.00% of their portfolio | 2.0k $5.0k | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 2.0k $5.0k | Added +50 |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 1.1k $2.8k | New |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 600 $1.5k | Unchanged |
| Wilmington Savings Fund Society, FSB 0.00% of their portfolio | 500 $1.3k | Unchanged |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 382 $963 | Reduced -2.9k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 235 $592 | Added +33 |
| CKW FINANCIAL GROUP 0.00% of their portfolio | 200 $1.0k | Unchanged |
| Spire Wealth Management 0.00% of their portfolio | 200 $504 | New |
| NewEdge Advisors, LLC 0.00% of their portfolio | 50 $126 | Unchanged |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio | 0 $0 | Unchanged |