Fuel Tech
FTEK
45 hedge funds and large institutions have $11.8M invested in Fuel Tech in 2025 Q4 according to their latest regulatory filings, with 11 funds opening new positions, 12 increasing their positions, 8 reducing their positions, and 12 closing their positions.
281% more call options, than puts
Call options by funds: $141K | Put options by funds: $37K
50% more repeat investments, than reductions
Existing positions increased: 12 | Existing positions reduced: 8
1.35% more ownership
Funds ownership: 23% → 24.35% (+1.4%)
8% less first-time investments, than exits
New positions opened: 11 | Existing positions closed: 12
6% less funds holding
Funds holding: 48 → 45 (-3)
45% less capital invested
Capital invested by funds: $21.4M → $11.8M (-$9.65M)
100% less funds holding in top 10
Funds holding in top 10: 1 → 0 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$830K |
| 2 |
Renaissance Technologies
New York
|
+$548K |
| 3 |
Two Sigma Investments
New York
|
+$278K |
| 4 |
XT
XTX Topco
George Town,
Cayman Islands
|
+$269K |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
+$247K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
EI
EAM Investors
Solana Beach,
California
|
-$1.02M |
| 2 |
MCS
Mercuria Capital Strategies
Houston,
Texas
|
-$720K |
| 3 |
M
Murchinson
Toronto,
Ontario, Canada
|
-$450K |
| 4 |
BFM
Boothbay Fund Management
New York
|
-$124K |
| 5 |
IWC
Integrated Wealth Concepts
Waltham,
Massachusetts
|
-$105K |
FTEK Hedge Fund Activity: Q4 2025 in Review
45 of the 8,228 institutional investors tracked by Wall St. Rank reported a position in Fuel Tech (FTEK) for Q4 2025, worth a combined $11.8M — down 45% from $21.4M a quarter earlier.
Sellers outnumbered buyers: 12 funds closed out of FTEK and 11 opened new positions — a net loss of 1 holder — while 8 trimmed existing stakes and 12 added.
The largest buyer was Citadel Advisors, adding an estimated $830K. The largest seller was EAM Investors, exiting entirely with an estimated $1.02M sold.
- 45 institutional investors held Fuel Tech (FTEK) as of Q4 2025, down from 48 in Q3 2025.
- Funds reported $11.8M of Fuel Tech stock for Q4 2025, down 45% quarter-over-quarter.
- 11 funds opened new Fuel Tech positions in Q4 2025 and 12 closed out, a net change of -1 holder.
- The largest Fuel Tech buyer in Q4 2025 was Citadel Advisors, an estimated $830K added.
- The largest Fuel Tech seller in Q4 2025 was EAM Investors, an estimated $1.02M sold.
Based on aggregated 13F filings for Q4 2025.