Grace & White files 13G/A: 1.54M shares in Fuel Tech (NASDAQ: FTEK)

Rhea-AI Filing Summary

Fuel Tech, Inc. amendment to a Schedule 13G/A reports that Grace & White, Inc. beneficially owns 1,541,307 shares of common stock, representing 5.02% of the class. The filing shows 447,860 shares with sole voting power and 1,541,307 with sole dispositive power. The signatory certifies the holdings were not acquired to change control and references nomination activity under Rule 240.14a-11.

Key Figures

Beneficially owned shares: 1,541,307 shares Percent of class: 5.02% Sole voting power: 447,860 shares

3 metrics

Beneficially owned shares 1,541,307 shares Amount beneficially owned reported in the amendment

Percent of class 5.02% Percent of common stock beneficially owned

Sole voting power 447,860 shares Shares with sole power to vote or direct the vote

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment to Schedule 13G/A reporting beneficial ownership"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: 1,541,307 (b) Percent of class: 5.02%"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 1,541,307"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 5)

FUEL TECH, INC.

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

359523107

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 359523107

1

Names of Reporting Persons

Grace & White, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

NEW YORK

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 447,860.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,541,307.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,541,307.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.02 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: FUEL TECH, INC.
(b)	Address of issuer's principal executive offices: 27601 Bella Vista Parkway, Warrenville, IL 60555
Item 2.
(a)	Name of person filing: Grace & White, Inc
(b)	Address or principal business office or, if none, residence: Grace & White, Inc 515 Madison Ave. Suite 1700 NY, NY 10022
(c)	Citizenship: NY
(d)	Title of class of securities: COMMON STOCK
(e)	CUSIP No.:
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 1,541,307
(b)	Percent of class: 5.02%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 447,860
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,541,307
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Grace & White, Inc.

Signature:	S/MARC RAVITZ
Name/Title:	Marc Ravitz , Executive Vice President
Date:	04/06/2026

FAQ

What does the FTEK Schedule 13G/A amendment disclose?

It discloses that Grace & White, Inc. beneficially owns 1,541,307 shares of Fuel Tech common stock, equal to 5.02% of the class. The filing lists voting and dispositive powers and includes a certification about control intent.

Does the filing indicate Grace & White seeks to change control of FTEK?

No. The filing includes a signed certification stating the securities "were not acquired and are not held for the purpose of or with the effect of changing or influencing the control" of the issuer, with a nomination reference to Rule 240.14a-11.

How many shares does Grace & White have voting authority over in FTEK?

The filing reports 447,860 shares as the amount over which Grace & White has sole power to vote or direct the vote. It separately reports 1,541,307 shares as sole dispositive power.

What is the significance of the 5.02% ownership in the filing?

The 5.02% figure is the percent of the outstanding common stock beneficially owned by Grace & White as reported in this amendment. It is a disclosure threshold showing the filer’s stake but does not by itself imply control or an intent to change control.

Who signed the Schedule 13G/A amendment for FTEK?

The amendment is signed by Marc Ravitz, Executive Vice President, on behalf of Grace & White, Inc., certifying the accuracy of the ownership details and the control-intent statement dated 04/06/2026.