# EDGAR Filing Document

**Accession Number:** 0000846913
**File Stem:** 0001437749-26-006620
**Filing Date:** 2026-3
**Character Count:** 26467
**Document Hash:** ce23c81cba68b1301d658fb864dc960d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-26-006620.hdr.sgml**: 20260303

**ACCESSION NUMBER**: 0001437749-26-006620

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 15

**CONFORMED PERIOD OF REPORT**: 20260303

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260303

**DATE AS OF CHANGE**: 20260303

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FUEL TECH, INC.
- **CENTRAL INDEX KEY:** 0000846913
- **STANDARD INDUSTRIAL CLASSIFICATION:** INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFYING EQUIP [3564]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 205657551
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33059
- **FILM NUMBER:** 26714928

**BUSINESS ADDRESS:**
- **STREET 1:** 27601 BELLA VISTA PARKWAY
- **CITY:** WARRENVILLE
- **STATE:** IL
- **ZIP:** 60555
- **BUSINESS PHONE:** 6308454431

**MAIL ADDRESS:**
- **STREET 1:** 27601 BELLA VISTA PARKWAY
- **CITY:** WARRENVILLE
- **STATE:** IL
- **ZIP:** 60555

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FUEL TECH N V
- **DATE OF NAME CHANGE:** 19930510

?xml version='1.0' encoding='ASCII'? ftek20260225_8k.htm

**United States**

**Securities And Exchange Commission**

**Washington, D.C. 20549**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934**

Date of Report (Date of earliest event reported) March 3, 2026

**FUEL TECH, INC.**

(Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware**<br> (State or other jurisdiction<br> of incorporation) | **001-33059**<br> (Commission<br> File Number) | **20-5657551**<br> (IRS Employer<br> Identification No.) |

---

**Fuel Tech, Inc.**

**27601 Bella Vista Parkway**

**Warrenville, IL 60555-1617**

**630-845-4500**

**(Address and telephone number of principal executive offices)**

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| Common Stock | FTEK | NASDAQ |

---

**Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provision:**

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

**ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION.**

On March 3, 2026, Fuel Tech, Inc. ("Fuel Tech" or the "Registrant") issued a press release which contained, among other things, an announcement of Fuel Tech's financial results for the fourth quarter and for the full year ended December 31, 2025. A copy of the Press Release is furnished as Exhibit 99.1 to this Form 8-K.

**ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS.**

**(a) Financial Statements of Businesses Acquired.**

None.

**(b) Pro Forma Financial Information.**

None.

**(d) Exhibits.**

**<u>Exhibit No.</u>** &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **<u>Description</u>**

99.1 [Release of Fuel Tech, Inc. dated March 3, 2026.](ex_925219.htm)

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **Fuel Tech, Inc.** | **Fuel Tech, Inc.** |
|  | (Registrant) | (Registrant) |
| Date: March 3, 2026 |  |  |
|  | By: | /s/ Ellen T. Albrecht |
|  |  | &nbsp;&nbsp;&nbsp; Ellen T. Albrecht |
|  |  | &nbsp;&nbsp;&nbsp;&nbsp; Vice President, Chief Financial Officer<br> &nbsp;&nbsp;&nbsp;&nbsp; and Treasurer |

---

## Exhibit 99.1

**Exhibit 99.1**

![ft01.jpg](ft01.jpg)

CONTACT: Vince Arnone President and CEO (630) 845-4500 Devin Sullivan Managing Director The Equity Group Inc. <u>dsullivan@theequitygroup.com</u>

**<u>FOR IMMEDIATE RELEASE</u>**

**<u>FUEL TECH REPORTS 2025 FOURTH QUARTER AND FULL YEAR FINANCIAL RESULTS</u>**

**WARRENVILLE, Ill., - March 3, 2026** – **Fuel Tech, Inc. (NASDAQ: FTEK)**, a technology company using advanced engineering processes to provide emissions control systems and water treatment technologies in utility and industrial applications, today reported financial results for the fourth quarter and full year ended December 31, 2025.

"2025 was a year of achievement for Fuel Tech, highlighted by a resurgence at our FUEL CHEM® operations that produced the highest annual segment revenue since 2018, a broadened opportunity landscape at our Air Pollution Control ("APC") business segment driven in large part by the expected growth of power generation to support data center construction and operation, and measurable progress at our Dissolved Gas Infusion ("DGI") business segment," said Vincent J. Arnone, President and CEO. "We maintained a strong balance sheet, finishing the year with nearly $32 million in cash and investments and no long-term debt."

**<u>Business Segment Performance</u>**

Revenues at FUEL CHEM increased by 37.4% in the fourth quarter of 2025 ("Q4 2025") and by 27.9% for the 2025 full year ("FY 2025") compared to their respective prior year periods, with gross margin being maintained at historic segment levels. Results for Q4 2025 included contributions from a six-month, commercially-priced demonstration program for a new FUEL CHEM customer in the United States that commenced in early November and is continuing in the current first quarter. The annual revenue potential from this commercial contract should it convert from a demonstration is expected to be approximately $2.5 to $3.0 million based on the customer running the program full-time, with the revenue expected to generate historic FUEL CHEM gross margins.

------

Revenues generated by the Air Pollution Control ("APC") segment rose by 36.7% in Q4 2025 compared to the same period last year, but declined for FY 2025. Revenues for both periods reflected customer-driven delays and timing of project completion. The Company announced $8.8 million of new APC awards in 2025 from new and existing customers in the U.S., Europe and Southeast Asia. This activity supported an increase in consolidated APC segment backlog at December 31, 2025 to $7.0 million, up from $6.2 million at December 31, 2024.

Mr. Arnone continued, "We are continuing to pursue a robust sales pipeline comprised of multiple potential customers for the integration of our Selective Catalytic Reduction ("SCR") technologies with power generation sources that meet the emissions control requirements for data centers planned across the U.S. over the next several years. We remain actively engaged with our supply chain partners and engineering colleagues to advance these opportunities. Our current pipeline of potential sales opportunities related to data center construction is approximately $75-100 million."

The Company is continuing the extended demonstration of its DGI technology at a fish hatchery in the western U.S., which remains on track to conclude in the second quarter of 2026. The system is performing well, meeting customer expectations for the precise delivery of concentrated dissolved oxygen, and generating positive initial results. A second trial that commenced at a municipal wastewater site in the southeast U.S. was successfully completed in January 2026 and converted to a six-month demonstration rental contract that is expected to run through the third quarter of 2026.

**<u>Fourth Quarter 2025 (</u>**<u>"</u>**<u>Q4 2025</u>**<u>"</u>**<u>) Consolidated Results Overview</u>**

***All comparisons are to the fourth quarter ended December 31, 2024 unless otherwise stated*.**

Consolidated revenues for Q4 2025 rose 37% to $7.2 million from $5.3 million, driven by increases in both APC and FUEL CHEM segment revenues.

Consolidated gross margin for Q4 2025 expanded to 44.6% of revenues from 42.3% of revenues, primarily reflecting higher APC segment gross margins.

SG&A expenses for Q4 2025 were $4.2 million, or 57.3% of revenues, compared to $3.9 million, or 74.7% of revenues.

Interest income was flat at $0.3 million and related primarily to interest received on the held-to-maturity debt securities and money market funds.

Net loss in Q4 2025 was $(1.2) million, or $(0.04) per share, compared to net loss of $(1.9) million, or $(0.06) per share.

Adjusted EBITDA loss was $(1.2) million in Q4 2025 compared to an Adjusted EBITDA loss of $(1.8) million.

------

APC segment revenue rose 37% to $2.4 million from $1.8 million, primarily related to project timing. Segment gross margin expanded to 42.3% from 35.8%, primarily due to product and project mix.

FUEL CHEM segment revenue rose 37% to $4.9 million from $3.5 million, primarily driven by the extended life of certain coal fired units to satisfy increasing energy demand, to the addition of the aforementioned new customer demonstration and to all base units running at capacity without interruption from unscheduled outages. Segment gross margin was 45.8% compared to 45.5%.

**<u>2025 Full Year Overview</u>**

Consolidated revenues for 2025 rose to $26.7 million from $25.1 million in 2024, driven by higher FUEL CHEM segment revenues, partially offset by a decrease in APC segment revenues.

Consolidated gross margin for 2025 expanded to 46.4% from 42.3% in 2024, reflecting higher APC and FUEL CHEM gross margins.

SG&A expenses for 2025 were $14.1 million, or 52.7% of revenues, as compared to $13.8 million, or 54.8% of revenues in 2024, reflecting an increase in employee related cost and other expenses.

Interest income was $1.4 million in 2025 compared to $1.3 million in 2024.

Net loss for 2025 was $(2.3) million, or $(0.08) per share, compared to net loss of $(1.9) million, or $(0.06) per share, in 2024.

Adjusted EBITDA loss was $(2.7) million in 2025 compared to Adjusted EBITDA loss of $(2.2) million in 2024.

**<u>Financial Condition</u>**

At December 31, 2025, cash and cash equivalents were $11.9 million, short-term investments were $12.9 million, and long-term investments totaled $7.0 million. Stockholders' equity at December 31, 2025 was $40.0 million, or $1.29 per share, and the Company had no debt.

**<u>Conference Call</u>**

Management will host a conference call on Wednesday, March 4, 2026 at 10:00 am ET / 9:00 am CT to discuss the results and business activities. Interested parties may participate in the call by dialing:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● (877) 423-9820 (*Domestic*) or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● (201) 493-6749 (*International*)

The conference call will also be accessible via the Upcoming Events section of the Company's web site at <u>www.ftek.com</u>. Following management's opening remarks, there will be a question-and-answer session.

------

**<u>About Fuel Tech</u>**

Fuel Tech develops and commercializes state-of-the-art proprietary technologies for air pollution control, process optimization, water treatment, and advanced engineering services. These technologies enable customers to operate in a cost-effective and environmentally sustainable manner. Fuel Tech is a leader in nitrogen oxide (NO<sub>x</sub>) reduction and particulate control technologies and its solutions have been installed on over 1,300 utility, industrial and municipal units worldwide. The Company's FUEL CHEM® technology improves the efficiency, reliability, fuel flexibility, boiler heat rate, and environmental status of combustion units by controlling slagging, fouling, corrosion and opacity. Water treatment technologies include DGI® Dissolved Gas Infusion Systems which utilize a patented saturator and a patent-pending channel injector to deliver supersaturated oxygen solutions and other gas-water combinations to target process applications or environmental issues. This infusion process has a variety of applications in the water and wastewater industries, including remediation, aeration, biological treatment and wastewater odor management. Many of Fuel Tech's products and services rely heavily on the Company's exceptional Computational Fluid Dynamics modeling capabilities, which are enhanced by internally developed, high-end visualization software. For more information, visit Fuel Tech's web site at <u>www.ftek.com</u>.

**NOTE REGARDING FORWARD-LOOKING STATEMENTS**

This press release contains "forward-looking statements" as defined in Section 21E of the Securities Exchange Act of 1934, as amended, which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and reflect Fuel Tech's current expectations regarding future growth, results of operations, cash flows, performance and business prospects, and opportunities, as well as assumptions made by, and information currently available to, our management. Fuel Tech has tried to identify forward-looking statements by using words such as "anticipate," "believe," "plan," "expect," "estimate," "intend," "will," and similar expressions, but these words are not the exclusive means of identifying forward-looking statements. These statements are based on information currently available to Fuel Tech and are subject to various risks, uncertainties, and other factors, including, but not limited to, those discussed in Fuel Tech's Annual Report on Form 10-K in Item 1A under the caption "Risk Factors," and subsequent filings under the Securities Exchange Act of 1934, as amended, which could cause Fuel Tech's actual growth, results of operations, financial condition, cash flows, performance and business prospects and opportunities to differ materially from those expressed in, or implied by, these statements. Fuel Tech undertakes no obligation to update such factors or to publicly announce the results of any of the forward-looking statements contained herein to reflect future events, developments, or changed circumstances or for any other reason. Investors are cautioned that all forward-looking statements involve risks and uncertainties, including those detailed in Fuel Tech's filings with the Securities and Exchange Commission.

------

**FUEL TECH, INC.**

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)

---

| | | |
|:---|:---|:---|
|  | December 31, | December 31, |
|  | 2025 | 2024 |
| **ASSETS** |  |  |
| Current assets: |  |  |
| Cash and cash equivalents | $11939 | $8510 |
| Short-term investments | 12942 | 10184 |
| Accounts receivable, less current expected credit loss of $108 and $106, respectively | 5355 | 9368 |
| Inventories, net | 373 | 397 |
| Prepaid expenses and other current assets | 1.355 | 1160 |
| Total current assets | 31944 | 29619 |
| Property and equipment, net | 4739 | 5084 |
| Goodwill | 2116 | 2116 |
| Other intangible assets, net | 646 | 327 |
| Right-of-use operating lease assets | 536 | 585 |
| Long-term investments | 6991 | 10875 |
| Other assets | 207 | 191 |
| Total assets | $47179 | $48797 |
| **LIABILITIES AND STOCKHOLDERS**' **EQUITY** |  |  |
| Current liabilities: |  |  |
| Accounts payable | $3242 | $2915 |
| Accrued liabilities: |  |  |
| Operating lease liabilities - current | 89 | 77 |
| Employee compensation | 1308 | 1248 |
| Other accrued liabilities | 1634 | 1615 |
| Total current liabilities | 6273 | 5855 |
| Operating lease liabilities - non-current | 491 | 548 |
| Deferred income taxes | 187 | 176 |
| Other liabilities | 296 | 263 |
| Total liabilities | 7247 | 6842 |
| Stockholders' equity: |  |  |
| Common stock, $.01 par value, 40,000,000 shares authorized, 32,281,179 and 31,767,329 shares issued, and 31,074,438 and 30,708,273 shares outstanding in 2025 and 2024, respectively | 322 | 317 |
| Additional paid-in capital | 165616 | 165295 |
| Accumulated deficit | (121796) | (119472) |
| Accumulated other comprehensive loss | (1718) | (1915) |
| Nil coupon perpetual loan notes | 76 | 76 |
| Treasury stock, at cost (Note 5) | (2568) | (2346) |
| Total stockholders' equity | 39932 | 41955 |
| Total liabilities and stockholders' equity | $47179 | $48797 |

---

See notes to condensed consolidated financial statements.

------

**FUEL TECH, INC.**

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except share and per share data)

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | Three Months Ended | Three Months Ended | Twelve Months Ended | Twelve Months Ended |
|  | December 31, | December 31, | December 31, | December 31, |
|  | 2025 | 2024 | 2025 | 2024 |
| **Revenues** | $7247 | $5283 | $26677 | $25133 |
| **Costs and expenses:** |  |  |  |  |
| Cost of sales | 4013 | 3048 | 14294 | 14510 |
| Selling, general and administrative | 4155 | 3946 | 14050 | 13761 |
| Research and development | 504 | 405 | 2014 | 1564 |
| Total costs and expenses | 8672 | 7399 | 30358 | 29835 |
| **Operating loss** | (1425) | (2116) | (3681) | (4702) |
| Interest income | 288 | 283 | 1415 | 1251 |
| Other (expense) income, net | (58) | 9 | (43) | 1585 |
| **Loss before income taxes** | (1195) | (1824) | (2309) | (1866) |
| Income tax expense | (4) | (59) | (15) | (77) |
| **Net loss** | $(1199) | $(1883) | $(2324) | $(1943) |
| **Net loss per common share:** |  |  |  |  |
| **Basic net loss per common share** | $(0.04) | $(0.06) | $(0.08) | $(0.06) |
| **Diluted net loss per common share** | $(0.04) | $(0.06) | $(0.08) | $(0.06) |
| **Weighted-average number of common shares outstanding:** |  |  |  |  |
| Basic | 31074000 | 30708000 | 30937000 | 30572000 |
| Diluted | 31074000 | 30708000 | 30937000 | 30572000 |

---

See notes to condensed consolidated financial statements.

------

**FUEL TECH, INC.**

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(in thousands)

---

| | | |
|:---|:---|:---|
|  | For the years ended December 31, | For the years ended December 31, |
|  | 2025 | 2024 |
| Net loss | $(2324) | $(1943) |
| Other comprehensive loss: |  |  |
| Foreign currency translation adjustments | 197 | (167) |
| Total other comprehensive income (loss) | 197 | (167) |
| Comprehensive loss | $(2127) | $(2110) |

---

See notes to condensed consolidated financial statements.

------

**FUEL TECH, INC.**

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

---

| | | |
|:---|:---|:---|
|  | For the years ended December 31, | For the years ended December 31, |
|  | 2025 | 2024 |
| **OPERATING ACTIVITIES** |  |  |
| Net loss | $(2324) | $(1943) |
| Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |
| Depreciation | 663 | 403 |
| Amortization | 36 | 57 |
| Loss on disposal of equipment | 2 |  |
| Non-cash interest income on held-to-maturity securities | (62) | (132) |
| Provision for credit losses, net of recoveries |  | (4) |
| Deferred income taxes | 11 | 4 |
| Stock-based compensation, net of forfeitures | 326 | 446 |
| Changes in operating assets and liabilities: |  |  |
| Accounts receivable | 2518 | (1127) |
| Employee retention credit receivable | 1677 | (1677) |
| Inventories | 26 | 41 |
| Prepaid expenses, other current assets and other non-current assets | (172) | 292 |
| Accounts payable | 258 | 519 |
| Accrued liabilities and other non-current liabilities | 57 | (312) |
| Net cash provided by (used in) operating activities | 3016 | (3433) |
| **INVESTING ACTIVITIES** |  |  |
| Purchases of equipment, patents, and other intangible assets | (674) | (378) |
| Purchases of debt securities | (12031) | (18060) |
| Maturities of debt securities | 13250 | 12995 |
| Net cash provided by (used in) investing activities | 545 | (5443) |
| **FINANCING ACTIVITIES** |  |  |
| Taxes paid on behalf of equity award participants | (222) | (95) |
| Net cash used in financing activities | (222) | (95) |
| Effect of exchange rate fluctuations on cash | 91 | (97) |
| **Net increase (decrease) in cash and cash equivalents** | 3429 | (9068) |
| Cash and cash equivalents at beginning of period | 8510 | 17578 |
| **Cash and cash equivalents at end of period** | $11939 | $8510 |
| Supplemental Cash Flow Information: |  |  |
| Cash income taxes paid, net | $11 | $52 |
| Non-cash transfer from other non-current assets to property and equipment |  | 597 |

---

See notes to condensed consolidated financial statements.

------

**FUEL TECH, INC.**

**Segment Data- Reporting Segments**

(in thousands)

Information about reporting segment net sales and gross margin from operations is provided below:

---

| | | | | |
|:---|:---|:---|:---|:---|
| <u>Three months ended December 31, 2025</u> | Air<br> Pollution<br> Control<br> Segment | FUEL<br> CHEM<br> Segment | Other | Total |
| Revenues from external customers | $2393 | $4854 | $— | $7247 |
| Cost of sales | (1380) | (2633) |  | (4013) |
| Gross margin | 1013 | 2221 |  | 3234 |
| Selling, general and administrative |  |  | (4155) | (4155) |
| Research and development |  |  | (504) | (504) |
| Operating income (loss) from continuing operations | $1013 | $2221 | $(4659) | $(1425) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
| <u>Three months ended December 31, 2024</u> | Air<br> Pollution<br> Control<br> Segment | FUEL<br> CHEM<br> Segment | Other | Total |
| Revenues from external customers | $1751 | $3532 | $— | $5283 |
| Cost of sales | (1123) | (1925) |  | (3048) |
| Gross margin | 628 | 1607 |  | 2235 |
| Selling, general and administrative |  |  | (3946) | (3946) |
| Research and development |  |  | (405) | (405) |
| Operating income (loss) from continuing operations | $628 | $1607 | $(4351) | $(2116) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
| <u>For the year ended December 31, 2025</u> | Air<br> Pollution<br> Control<br> Segment | FUEL<br> CHEM<br> Segment | Other | Total |
| Revenues from external customers | $8908 | $17769 | $— | $26677 |
| Cost of sales | (5093) | (9201) |  | (14294) |
| Gross margin | 3815 | 8568 |  | 12383 |
| Selling, general and administrative |  |  | (14050) | (14050) |
| Research and development |  |  | (2014) | (2014) |
| Operating income (loss) from continuing operations | $3815 | $8568 | $(16064) | $(3681) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
| <u>For the year ended December 31, 2024</u> | Air<br> Pollution<br> Control<br> Segment | FUEL<br> CHEM<br> Segment | Other | Total |
| Revenues from external customers | $11242 | $13891 | $— | $25133 |
| Cost of sales | (7050) | (7460) |  | (14510) |
| Gross margin | 4192 | 6431 |  | 10623 |
| Selling, general and administrative |  |  | (13761) | (13761) |
| Research and development |  |  | (1564) | (1564) |
| Operating income (loss) from continuing operations | $4192 | $6431 | $(15325) | $(4702) |

---

------

**FUEL TECH, INC.**

**Geographic Segment Financial Data**

*(*in thousands)

Information concerning our operations by geographic area is provided below. Revenues are attributed to countries based on the location of the end-user. Assets are those directly associated with operations of the geographic area.

---

| | | |
|:---|:---|:---|
| <u>For the years ended December 31,</u> | 2025 | 2024 |
| Revenues: |  |  |
| United States | $21022 | $17802 |
| Other Foreign | 5655 | 7331 |
|  | $26677 | $25133 |
| <u>As of December 31,</u> | 2025 | 2024 |
| Assets: |  |  |
| United States | $44345 | $44430 |
| Foreign | 2873 | 4367 |
|  | $47218 | $48797 |

---

------

**FUEL TECH, INC.**

RECONCILIATION OF GAAP NET LOSS TO EBITDA AND ADJUSTED EBITDA

(in thousands)

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | Three Months Ended | Three Months Ended | Twelve Months Ended | Twelve Months Ended |
|  | December 31, | December 31, | December 31, | December 31, |
|  | 2025 | 2024 | 2025 | 2024 |
| **Net loss** | $(1199) | $(1883) | $(2276) | $(1943) |
| Interest income, net | (288) | (283) | (1415) | (1251) |
| Income tax expense | (44) | 59 | (33) | 77 |
| Depreciation expense | 173 | 155 | 663 | 403 |
| Amortization expense | 9 | 15 | 36 | 57 |
| **EBITDA** | (1301) | (1937) | (3025) | (2657) |
| Stock compensation expense | 57 | 109 | 326 | 446 |
| **Adjusted EBITDA** | $(1244) | $(1828) | $(2699) | $(2211) |

---

**Adjusted EBITDA**

To supplement the Company's consolidated financial statements presented in accordance with generally accepted accounting principles in the United States (GAAP), the Company has provided an Adjusted EBITDA disclosure as a measure of financial performance. Adjusted EBITDA is defined as net income (loss) before interest expense, income tax expense (benefit), depreciation expense, amortization expense, stock compensation expense, and intangible assets abandonment and building impairment. The Company's reference to these non-GAAP measures should be considered in addition to results prepared in accordance with GAAP standards, but are not a substitute for, or superior to, GAAP results.

Adjusted EBITDA is provided to enhance investors' overall understanding of the Company's current financial performance and ability to generate cash flow, which we believe is a meaningful measure for our investor and analyst communities. In many cases non-GAAP financial measures are utilized by these individuals to evaluate Company performance and ultimately determine a reasonable valuation for our common stock. A reconciliation of Adjusted EBITDA to the nearest GAAP measure of net loss has been included in the above financial table.