Fuel Tech CEO buys 1,470.529 shares at $1.36

Fuel Tech’s CEO increased his direct ownership with a 1,470.529-share open-market purchase at a weighted average price of $1.36.

Rhea-AI Filing Summary

FUEL TECH, INC. (FTEK) President & CEO Nuggihalli Ramesh purchased common stock in an open-market transaction on September 1, 2026. He bought 1,470.529 shares at a weighted average price of $1.36 per share, and now holds 1,470.529 shares directly. No Rule 10b5-1 trading plan is reported. The price reflects multiple trades aggregated into a single average, as described in the footnote.

Insider Trade Summary

Net Buyer: 1,470.529 shares

Net Buy 1 txn

Insider Nuggihalli Ramesh

Role President & CEO

Bought 1,470.529 shs ($2K)

Type	Security	Shares	Price	Value
Purchase	Common Stock F1	1,470.529	$1.36	$2K

Holdings After Transaction: Common Stock — 1,470.529 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average share price. The shares were purchased in multiple transactions for an average price of $1.360. The reporting person undertakes to provide to any security holder of Fuel Tech, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

Key Figures

Shares purchased: 1,470.529 shares Weighted average purchase price: $1.36 per share Shares owned after transaction: 1,470.529 shares +1 more

4 metrics

Shares purchased 1,470.529 shares Common stock bought by the President & CEO on September 1, 2026

Weighted average purchase price $1.36 per share Open-market or private transaction purchases aggregated in the Form 4

Shares owned after transaction 1,470.529 shares Direct ownership of the President & CEO following the reported purchase

Reported buy transactions 1 transaction Number of purchase transactions reported in this Form 4

Key Terms

weighted average share price, open market or private transaction, Rule 10b5-1 trading plan

3 terms

weighted average share price financial

"The price reported in Column 4 is a weighted average share price."

The weighted average share price is the average price of a stock calculated by giving each recorded trade price a weight proportional to the number of shares traded at that price (or, more generally, by the relevant share quantity for each price). It is computed as the sum of (price × shares) for all transactions divided by the total shares traded, so prices with larger volumes have a bigger effect than low-volume prices; this contrasts with a simple (unweighted) average that treats every price equally.

open market or private transaction financial

"Purchase in open market or private transaction"

Rule 10b5-1 trading plan regulatory

"No Rule 10b5-1 trading plan is reported for this transaction"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did FTEK’s President & CEO report on this Form 4?

He reported an open-market purchase of 1,470.529 shares of Fuel Tech common stock on September 1, 2026 at a weighted average price of $1.36 per share.

How many FTEK shares does the CEO hold after this reported transaction?

After the reported purchase, President & CEO Nuggihalli Ramesh directly holds 1,470.529 shares of Fuel Tech common stock, according to the Form 4 disclosure.

At what price did the CEO buy FTEK shares in this Form 4 filing?

The CEO’s purchase is reported at a weighted average price of $1.36 per share. A footnote explains the shares were bought in multiple transactions and that full price details by trade are available upon request.

Was the FTEK CEO’s stock purchase made under a Rule 10b5-1 trading plan?

No. The filing indicates no Rule 10b5-1 trading plan is reported for this transaction; it is characterized simply as a purchase in an open market or private transaction.

What does the weighted average price mean in the FTEK CEO’s Form 4?

The filing states the reported $1.36 price is a weighted average share price. The CEO bought shares in multiple trades and aggregated them; detailed prices and share amounts for each trade are available upon request from Fuel Tech or the SEC staff.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/03/2026 - 04:10 PM EDT Accepted by SEC EDGAR 09/03/2026 - 04:06 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Nuggihalli Ramesh

(Last) (First) (Middle)

27601 BELLA VISTA PARKWAY

(Street)

WARRENVILLE ILLINOIS 60555

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
FUEL TECH, INC. [ FTEK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/01/2026		P		1,470.529	A	$1.36(1)	1,470.529	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in Column 4 is a weighted average share price. The shares were purchased in multiple transactions for an average price of $1.360. The reporting person undertakes to provide to any security holder of Fuel Tech, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

	/s/ Ramesh Nuggihalli	09/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)