Vault-13

FUEL TECH INC FTEK

COM · Common Stock · CUSIP 359523107

37 institutional holders +1 vs Q1 2025
6,138,3966.1m shares reported held*
19.8% of all shares outstanding*
$15.5mreported value*
8 new 7 added 9 reduced 7 sold out net sold ≈ $1.5m (-580.4k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 31.1m as of 2025-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $2.52. Options: 4 managers hold calls ($35.8k notional), 2 hold puts ($310.5k).

Trends to Q2 2025

Institutional holders

Managers reporting a position, each quarter

0204060Q3 22: 37Q4 22: 42Q1 23: 38Q2 23: 41Q3 23: 39Q4 23: 37Q1 24: 34Q2 24: 35Q3 24: 37Q4 24: 40Q1 25: 36Q2 25: 3737Q3 22Q2 23Q1 24Q4 24Q2 25
Numbers
QuarterHolders
Q3 202237
Q4 202242
Q1 202338
Q2 202341
Q3 202339
Q4 202337
Q1 202434
Q2 202435
Q3 202437
Q4 202440
Q1 202536
Q2 202537

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
20020Q3 23: 10 bought or addedQ3 23: 17 cut or sold outQ4 23: 14 bought or addedQ4 23: 15 cut or sold outQ4 23Q1 24: 10 bought or addedQ1 24: 13 cut or sold outQ2 24: 12 bought or addedQ2 24: 10 cut or sold outQ2 24Q3 24: 16 bought or addedQ3 24: 7 cut or sold outQ4 24: 16 bought or addedQ4 24: 9 cut or sold outQ4 24Q1 25: 15 bought or addedQ1 25: 16 cut or sold outQ2 25: 15 bought or addedQ2 25: 16 cut or sold outQ2 25
Numbers
QuarterBought or addedCut or sold out
Q3 20231017
Q4 20231415
Q1 20241013
Q2 20241210
Q3 2024167
Q4 2024169
Q1 20251516
Q2 20251516

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$100k$200k$300k$400kQ3 24 calls: $29.8kQ3 24 puts: $10.5kQ3 24P/C 0.35Q4 24 calls: $85.6kQ4 24 puts: $735Q4 24P/C 0.01Q1 25 calls: $46.8kQ1 25 puts: $11.6kQ1 25P/C 0.25Q2 25 calls: $35.8kQ2 25 puts: $310.5kQ2 25P/C 8.68
Numbers
QuarterCallsPutsP/C
Q3 2024$29.8k$10.5k0.35
Q4 2024$85.6k$7350.01
Q1 2025$46.8k$11.6k0.25
Q2 2025$35.8k$310.5k8.68

Biggest buyers

Informed Momentum Co LLC New +283,940+283.9k
INTEGRITY WEALTH ADVISORS, INC. New +70,000+70.0k
UBS Group AG Added +25,475+25.5k
MARSHALL WACE, LLP New +25,088+25.1k
SIMPLEX TRADING, LLC Added +21,703+21.7k
GEODE CAPITAL MANAGEMENT, LLC Added +17,766+17.8k
HRT FINANCIAL LP New +15,112+15.1k
Advisory Services Network, LLC New +15,000+15.0k
CORSAIR CAPITAL MANAGEMENT, L.P. New +10,000+10.0k
STATE STREET CORP Added +1,600+1.6k

Biggest sellers

Peapod Lane Capital LLC Reduced -313,588-313.6k
GRACE & WHITE INC /NY Reduced -264,623-264.6k
CITADEL ADVISORS LLC Reduced -144,165-144.2k
RENAISSANCE TECHNOLOGIES LLC Reduced -104,300-104.3k
GSA CAPITAL PARTNERS LLP Sold out -79,247-79.2k
BlackRock, Inc. Reduced -52,725-52.7k
ESSEX INVESTMENT MANAGEMENT CO LLC Reduced -46,991-47.0k
GROUP ONE TRADING LLC Sold out -17,639-17.6k
XTX Topco Ltd Sold out -16,646-16.6k
Legato Capital Management LLC Reduced -12,160-12.2k

Biggest calls

CITADEL ADVISORS LLC Added $31.2k12.4k shares
GROUP ONE TRADING LLC Added $4.5k1.8k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares
SIMPLEX TRADING, LLC Added $0200 shares

Biggest puts

CITADEL ADVISORS LLC Added $310.5k123.2k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

No one currently above 5% in the filings since 19 Dec 2024.

Fell to 5% or below in the last year: GRACE & WHITE INC /NY (4.9%, 2026-10-07)

Insider purchases and sales in Q2 2025

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
404Q3 23: 1 buyingQ3 23: 0 sellingQ4 23: 0 buyingQ4 23: 0 sellingQ4 23Q1 24: 0 buyingQ1 24: 0 sellingQ2 24: 0 buyingQ2 24: 0 sellingQ2 24Q3 24: 3 buyingQ3 24: 0 sellingQ4 24: 1 buyingQ4 24: 0 sellingQ4 24Q1 25: 1 buyingQ1 25: 0 sellingQ2 25: 0 buyingQ2 25: 1 sellingQ2 25
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q3 20231$18.0k0——
Q4 20230—0——
Q1 20240—0——
Q2 20240—0——
Q3 20243$50.0k0——
Q4 20241$50.1k0——
Q1 20251$15.8k0——
Q2 20250—1$21.1k—
DateInsiderTradeSharesPrice ValueTheir holding
2025-06-04 Jones Sharon L Director Sold 12,627 $1.67 $21.1k12.6k shares -13%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 GRACE & WHITE INC /NY 0.75% of their portfolio NY, NY 1,634,5261.6m $4.1m $4.1m 0.75% Reduced -264.6k -264,623
2 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 940,969941.0k $2.4m $2.4m 0.00% Unchanged
3 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 852,406852.4k $2.1m $2.1m 0.00% Reduced -104.3k -104,300
4 Peapod Lane Capital LLC 1.68% of their portfolio Bedford Hills, NY 667,514667.5k $1.7m $1.7m 1.68% Reduced -313.6k -313,588
5 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 517,658517.7k $1.3m $1.3m 0.00% Added +17.8k +17,766
6 BlackRock, Inc. 0.00% of their portfolio New York, NY 411,018411.0k $1.0m $1.0m 0.00% Reduced -52.7k -52,725
7 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 304,776304.8k $768.0k $768.0k 0.00% Unchanged
8 Informed Momentum Co LLC 0.11% of their portfolio SOLANA BEACH, CA 283,940283.9k $715.5k $715.5k 0.11% New
9 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 97,04697.0k $244.6k $244.6k 0.00% Added +1.6k +1,600
10 ESSEX INVESTMENT MANAGEMENT CO LLC 0.04% of their portfolio BOSTON, MA 77,25077.2k $194.7k $194.7k 0.04% Reduced -47.0k -46,991
11 INTEGRITY WEALTH ADVISORS, INC. 0.12% of their portfolio Ventura, CA 70,00070.0k $176.4k $176.4k 0.12% New
12 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 36,82236.8k $92.8k $92.8k 0.00% Unchanged
13 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 30,11630.1k $75.9k $75.9k 0.00% Reduced -144.2k -144,165
14 UBS Group AG 0.00% of their portfolio ZURICH, V8 27,44327.4k $69.2k $69.2k 0.00% Added +25.5k +25,475
15 Cresset Asset Management, LLC 0.00% of their portfolio Chicago, IL 25,50025.5k $64.3k $64.3k 0.00% Unchanged
16 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 25,08825.1k $63.2k $63.2k 0.00% New
17 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 22,91122.9k $57.0k $57.0k 0.00% Added +21.7k +21,703
18 Founders Capital Management 0.03% of their portfolio HOUSTON, TX 20,00020.0k $50.4k $50.4k 0.03% Unchanged
19 Legato Capital Management LLC 0.01% of their portfolio San Francisco, CA 18,16518.2k $45.8k $45.8k 0.01% Reduced -12.2k -12,160
20 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 15,11215.1k $38.0k $38.0k 0.00% New
21 Advisory Services Network, LLC 0.00% of their portfolio ATLANTA, GA 15,00015.0k $39.8k $39.8k 0.00% New
22 LexAurum Advisors, LLC 0.00% of their portfolio OVERLAND PARK, KS 11,85011.8k $29.9k $29.9k 0.00% Unchanged
23 HighTower Advisors, LLC 0.00% of their portfolio CHICAGO, IL 10,40010.4k $26.2k $26.2k 0.00% Reduced -100 -100
24 CORSAIR CAPITAL MANAGEMENT, L.P. 0.00% of their portfolio NEW YORK, NY 10,00010.0k $25.2k $25.2k 0.00% New
25 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 3,6503.6k $9.2k $9.2k 0.00% Added +450 +450
26 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 2,0002.0k $5.0k $5.0k 0.00% Unchanged
27 New England Capital Financial Advisors LLC 0.00% of their portfolio MERIDEN, CT 2,0002.0k $5.0k $5.0k 0.00% Unchanged
28 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 1,9692.0k $5.0k $5.0k 0.00% Added +50 +50
29 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 1,1001.1k $2.8k $2.8k 0.00% New
30 Steward Partners Investment Advisory, LLC 0.00% of their portfolio STAMFORD, CT 600600 $1.5k $1.5k 0.00% Unchanged
31 Wilmington Savings Fund Society, FSB 0.00% of their portfolio WILMINGTON, DE 500500 $1.3k $1.3k 0.00% Unchanged
32 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 382382 $963 $963 0.00% Reduced -2.9k -2,853
33 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 235235 $592 $592 0.00% Added +33 +33
34 CKW FINANCIAL GROUP 0.00% of their portfolio HONOLULU, HI 200200 $1.0k $1.0k 0.00% Unchanged
35 Spire Wealth Management 0.00% of their portfolio MCLEAN, VA 200200 $504 $504 0.00% New
36 NewEdge Advisors, LLC 0.00% of their portfolio NEW ORLEANS, LA 5050 $126 $126 0.00% Unchanged
37 CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio BIRMINGHAM, AL 00 $0 $0 — Unchanged