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Fuel Tech, Inc.

FTEK
Exchange
Nasdaq
Industry
Industrial & Commercial Fans & Blowers & Air Purifing Equip
SEC CIK
0000846913

In the last 90 days, Fuel Tech, Inc. insiders filed 1 open-market purchase and 0 sales; 43 institutions reported holding it in 13F filings for Q2 2026, worth $16.3M in total; no superinvestor holds it.

13F holders, Q4 2025

Institutional positions in Fuel Tech, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
45
−1 vs. Q3 2025
Shares held
7.57M
+449.4K (+6.3%) vs. Q3 2025
Total value
$11.8M
−$9.56M (−44.8%) vs. Q3 2025
New holders
11
12 more added
Sold out
12
8 more reduced

2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting FTEK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ4 2025: 45 institutions
Q1 2021: 50 institutionsQ2 2021: 45 institutionsQ3 2021: 39 institutionsQ4 2021: 41 institutionsQ1 2022: 34 institutionsQ2 2022: 30 institutionsQ3 2022: 36 institutionsQ4 2022: 40 institutionsQ1 2023: 37 institutionsQ2 2023: 40 institutionsQ3 2023: 38 institutionsQ4 2023: 36 institutionsQ1 2024: 33 institutionsQ2 2024: 34 institutionsQ3 2024: 36 institutionsQ4 2024: 39 institutionsQ1 2025: 35 institutionsQ2 2025: 36 institutionsQ3 2025: 48 institutionsQ4 2025: 45 institutionsQ1 2026: 46 institutionsQ2 2026: 43 institutions
Value heldQ4 2025: $11.8M
Q1 2021: $25.0MQ2 2021: $13.3MQ3 2021: $8.76MQ4 2021: $7.91MQ1 2022: $7.41MQ2 2022: $6.10MQ3 2022: $6.14MQ4 2022: $6.98MQ1 2023: $7.19MQ2 2023: $8.08MQ3 2023: $7.09MQ4 2023: $7.23MQ1 2024: $7.71MQ2 2024: $6.63MQ3 2024: $6.77MQ4 2024: $7.31MQ1 2025: $7.05MQ2 2025: $15.5MQ3 2025: $21.4MQ4 2025: $11.8MQ1 2026: $9.22MQ2 2026: $16.3M
Institutions holding FTEK and their total value by quarter
QuarterHoldersValue
Q2 202643$16.3M
Q1 202646$9.22M
Q4 202545$11.8M
Q3 202548$21.4M
Q2 202536$15.5M
Q1 202535$7.05M
Q4 202439$7.31M
Q3 202436$6.77M
Q2 202434$6.63M
Q1 202433$7.71M
Q4 202336$7.23M
Q3 202338$7.09M
Q2 202340$8.08M
Q1 202337$7.19M
Q4 202240$6.98M
Q3 202236$6.14M
Q2 202230$6.10M
Q1 202234$7.41M
Q4 202141$7.91M
Q3 202139$8.76M
Q2 202145$13.3M
Q1 202150$25.0M

Institutions, Q4 2025

Shares, value and share of portfolio for each institution holding Fuel Tech, Inc.; share changes are against Q3 2025.

Institutions holding FTEK in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Grace & White Inc1,485,883$2.32M0.41%−5,800−0.4%Reduced
Renaissance Technologies LLC1,147,995$1.79M0.00%+249,089+27.7%Added
Vanguard Group Inc1,126,003$1.76M0.00%+112,139+11.1%Added
Geode Capital Management, LLC518,939$809.6K0.00%−4,879−0.9%Reduced
Citadel Advisors LLC504,017$786.3K0.00%+376,994+296.8%Added
BlackRock, Inc.410,364$640.2K0.00%00.0%Unchanged
Peapod Lane Capital LLC359,643$561.0K0.48%+2,705+0.8%Added
US Bancorp304,776$475.5K0.00%00.0%Unchanged
Jane Street Group, LLC260,782$406.8K0.00%+23,860+10.1%Added
Susquehanna International Group, LLP237,976$371.2K0.00%+27,990+13.3%Added
XTX Topco Ltd178,303$278.2K0.01%+122,291+218.3%Added
Beartown Capital Management, LLC160,027$249.6K0.20%+160,027New
Two Sigma Investments, LP126,160$196.8K0.00%+126,160New
State Street Corp121,846$190.1K0.00%+8,100+7.1%Added
Marshall Wace, LLP81,011$126.4K0.00%+81,011New
Essex Investment Management Co LLC77,250$120.5K0.02%00.0%Unchanged
Two Sigma Advisers, LP67,500$105.3K0.00%+67,500New
Integrity Wealth Advisors, Inc.70,000$95.2K0.07%00.0%Unchanged
Dimensional Fund Advisors LP51,199$79.7K0.00%−3,202−5.9%Reduced
Group One Trading, L.P.42,509$66.3K0.00%+12,303+40.7%Added
American Century Companies Inc38,543$60.1K0.00%+1,988+5.4%Added
Gsa Capital Partners LLP32,011$50.0K0.00%−4,479−12.3%Reduced
Northern Trust Corp31,435$49.0K0.00%00.0%Unchanged
Cresset Asset Management, LLC25,500$39.8K0.00%00.0%Unchanged
Legato Capital Management LLC18,165$28.3K0.00%00.0%Unchanged
Virtu Financial LLC17,254$27.0K0.00%+17,254New
Two Sigma Securities, LLC14,583$22.7K0.00%+14,583New
Covestor Ltd13,187$21.0K0.01%00.0%Unchanged
Quadrature Capital Ltd11,579$18.1K0.00%+11,579New
HighTower Advisors, LLC10,440$16.3K0.00%+40+0.4%Added
Founders Capital Management5,000$7.80K0.00%00.0%Unchanged
Tower Research Capital LLC (TRC)4,288$6.69K0.00%+4,288New
Simplex Trading, LLC3,299$5.15K0.00%−39,202−92.2%Reduced
GWM Advisors LLC2,327$3.63K0.00%−15,326−86.8%Reduced
New England Capital Financial Advisors LLC2,000$3.12K0.00%00.0%Unchanged
Advisor Group Holdings, Inc.1,200$1.87K0.00%00.0%Unchanged
Wells Fargo & Company1,150$1.79K0.00%−2,500−68.5%Reduced
SBI Securities Co., Ltd.719$1.12K0.00%−110−13.3%Reduced
Steward Partners Investment Advisory, LLC600$9360.00%00.0%Unchanged
Bryn Mawr Trust Co500$7800.00%00.0%Unchanged
Bank of America Corp280$4370.00%+63+29.0%Added
Morgan Stanley21$330.00%+21New
FMR LLC18$280.00%+18New
CKW Financial Group200$00.00%00.0%Unchanged
Motiv8 Investments LLC100$00.00%+100New
EAM Investors, LLC0$00.00%−338,712−100.0%Sold out
Mercuria Capital Strategies, LLC0$00.00%−240,000−100.0%Sold out
Murchinson Ltd.0$00.00%−150,000−100.0%Sold out
Boothbay Fund Management, LLC0$00.00%−41,251−100.0%Sold out
Integrated Wealth Concepts LLC0$00.00%−35,000−100.0%Sold out
Goldman Sachs Group Inc0$00.00%−31,300−100.0%Sold out
HRT Financial LP0$00.00%−23,329−100.0%Sold out
Advisory Services Network, LLC0$00.00%−21,627−100.0%Sold out
Prelude Capital Management, LLC0$00.00%−13,233−100.0%Sold out
Citigroup Inc0$00.00%−474−100.0%Sold out
Spire Wealth Management0$00.00%−200−100.0%Sold out
UBS Group AG0$00.00%−97−100.0%Sold out
Cubist Systematic Strategies, LLC––––Not filed
LexAurum Advisors, LLC––––Not filed