Comparable stake leader
GRACE & WHITE INC /NY
SEC ownership of FUEL TECH, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000846913.
Disclosed value leader
GRACE & WHITE INC /NY
Comparable rows
45/50
Latest evidence
04 Jun 2026
- Public ticker
- FTEK on Nasdaq
- Parsed ownership sources
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- GRACE & WHITE INC /NY
- Latest 13D/G holder
- GRACE & WHITE INC /NY
- Latest parsed ownership date
- 04 Jun 2026
- Issuer CIK
- 0000846913
- Issuer location
- Warrenville, IL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of FUEL TECH, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
GRACE & WHITE INC /NY
Disclosed value leader
GRACE & WHITE INC /NY
Comparable rows
45/50
Latest evidence
04 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 5%
5 rows are not safely comparable across share classes.
13D/G row: GRACE & WHITE INC /NY
Showing 1-8 of 50 holder rows.
Quick read
GRACE & WHITE INC /NY leads the comparable SEC ownership view at 5%.
45 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens GRACE & WHITE INC /NY's linked filing trail.
Comparable ownership
Top 5
GRACE & WHITE INC /NY
5%
RENAISSANCE TECHNOLOGIES LLC
4.6%
VANGUARD CAPITAL MANAGEMENT LLC
3.2%
GEODE CAPITAL MANAGEMENT, LLC
1.7%
Peapod Lane Capital LLC
1.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| GRACE & WHITE INC /NY |
13D/G
13F
Grace & White, Inc. · Company
|
5%
|
$2,111,591
1,541,307 shares
|
+$75,931 | 31 Mar 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
4.6%
|
$1,717,523
1,407,806 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
3.2%
|
$1,205,358
987,998 shares
|
— | 31 Mar 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
1.7%
|
$650,106
532,808 shares
|
— | 31 Mar 2026 |
| Peapod Lane Capital LLC |
13F
Company
|
1.6%
|
$582,123
478,842 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
Company
|
1.3%
|
$500,644
410,364 shares
|
— | 31 Mar 2026 |
| US BANCORP \DE\ |
13F
Company
|
0.99%
|
$371,827
304,776 shares
|
— | 31 Mar 2026 |
| GSA CAPITAL PARTNERS LLP |
13F
Company
|
0.8%
|
$300,000
246,252 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$12,400.
Buys
$12,400
Insiders: 1
Sells
$0
Insiders: 0
Net
+$12,400
Shares: +10,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 10,000
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 10,000 | 0 | $12,400 | $0 | +$12,400 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-6 of 6 reporting-owner rows connected to FUEL TECH, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
6
Largest Forms 3/4/5 holder
Vincent J. Arnone
Net 12M change
+$12,400
Latest report
04 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Vincent J. Arnone | President & CEO, Director | $681,396 | +$12,400 | +1.9% | Filing P/S | 24 Mar 2026 |
| Sharon L. Jones | Director | $157,925 | Mixed | 04 Jun 2026 | ||
| Albrecht Ellen T. | Chief Financial Officer | $107,589 | Mixed | 24 Mar 2026 | ||
| Douglas G. Bailey | Director | $17,985 | Mixed | 04 Jun 2026 | ||
| Dennis L. Zeitler | Director | $17,985 | Mixed | 04 Jun 2026 | ||
| William E. Cummings Jr. | Senior Vice President, Sales | $11,271 | Mixed | 24 Mar 2026 |
Recent insider transactions for FUEL TECH, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Douglas G. Bailey | FTEK | Restricted Stock Units | Award | 15,000 | 15,000 | 04 Jun 2026 | Direct | |||
| Sharon L. Jones | FTEK | Restricted Stock Units | Award | 15,000 | 15,000 | 04 Jun 2026 | Direct | |||
| Dennis L. Zeitler | FTEK | Restricted Stock Units | Award | 15,000 | 15,000 | 04 Jun 2026 | Direct | |||
| Albrecht Ellen T. | FTEK | Restricted Stock Units | Award | 8,350 | 8,350 | 24 Mar 2026 | Direct | |||
| Vincent J. Arnone | FTEK | Restricted Stock Units | Award | 20,850 | 20,850 | 24 Mar 2026 | Direct | |||
| William E. Cummings Jr. | FTEK | Restricted Stock Units | Award | 6,250 | 6,250 | 24 Mar 2026 | Direct | |||
| Vincent J. Arnone | FTEK | Common Stock | Purchase | 1.85% | $12,400 | $1.24 | 10,000 | 549,513 | 06 Mar 2026 | Direct |
* marks a reported price that did not pass the local price check.