Celeste B. Mastin - 24 Jan 2026 Form 4 Insider Report for FULLER H B CO (FUL)

Reporting relationship: President and CEO, Director
Issuer ticker: FUL
Reported as of: 24 Jan 2026
Net transaction value: -$321,435
SEC form: 4
Accepted by SEC: 27 Jan 2026, 12:59:38 UTC
Prior SEC filing: 22 Jan 2026
Next SEC filing: 28 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Patrick J. Seul, Attorney-in-Fact

Key filing fact

Celeste B. Mastin filed Form 4 for FULLER H B CO (FUL) on 27 Jan 2026.

Key facts

This page summarizes Celeste B. Mastin's Form 4 filing for FULLER H B CO (FUL).
7 reported transactions and 8 derivative rows are listed below.
Accepted by SEC: 27 Jan 2026, 12:59.

Change

Previous filing in this sequence was filed on 22 Jan 2026.
Current net transaction value: -$321,435.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001297394 Primary reporting owner

Mastin Celeste Beeks

Relationship: President and CEO, Director
Address: 1200 WILLOW LAKE BOULEVARD, P.O. BOX 64683, ST. PAUL
Signature: /s/ Patrick J. Seul, Attorney-in-Fact
Signature date: 27 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

FUL transaction

Common Stock

Options Exercise

Transaction value: $572,647
Shares: +9,533
Change %: +59%
Price: $60.07
Shares after: 25,652
Date: 24 Jan 2026
Ownership: Direct

FUL transaction

Common Stock

Options Exercise

Transaction value: $253,075
Shares: +4,213
Change %: +16%
Price: $60.07
Shares after: 29,865
Date: 24 Jan 2026
Ownership: Direct

FUL transaction

Common Stock

Award

Transaction value: $22,646
Shares: +377
Change %: +1.3%
Price: $60.07
Shares after: 30,242
Date: 24 Jan 2026
Ownership: Direct
Footnotes: F1

FUL transaction

Common Stock

Tax liability

Transaction value: $107,585
Shares: -1,791
Change %: -5.9%
Price: $60.07
Shares after: 28,451
Date: 24 Jan 2026
Ownership: Direct
Footnotes: F2

FUL transaction

Common Stock

Tax liability

Transaction value: $236,496
Shares: -3,937
Change %: -14%
Price: $60.07
Shares after: 24,514
Date: 24 Jan 2026
Ownership: Direct
Footnotes: F3

FUL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,500
Date: 24 Jan 2026
Ownership: By Revocable Trust

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

FUL transaction Derivative

Performance Stock Units

Options Exercise

Transaction value: $572,647
Shares: -9,533
Change %: -100%
Price: $60.07
Shares after: 0
Date: 24 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,533
Exercise price: $0.000000
Footnotes: F4

FUL transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $253,075
Shares: -4,213
Change %: -100%
Price: $60.07
Shares after: 0
Date: 24 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,213
Exercise price: $0.000000
Footnotes: F5, F6

FUL holding Derivative

Employee Stock Option (Right-to-Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 135,135
Date: 24 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 135,135
Exercise price: $64.28
Footnotes: F7

FUL holding Derivative

Employee Stock Option (Right-to-Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 25,667
Date: 24 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 25,667
Exercise price: $67.55
Footnotes: F8

FUL holding Derivative

Employee Stock Option (Right-to-Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 72,261
Date: 24 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 72,261
Exercise price: $68.17
Footnotes: F8

FUL holding Derivative

Employee Stock Option (Right-to-Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 103,228
Date: 24 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 103,228
Exercise price: $77.72
Footnotes: F7

FUL holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 11,881
Date: 24 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,881
Exercise price: $0.000000
Footnotes: F5, F6, F9

FUL holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 24,043
Date: 24 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 24,043
Exercise price: $0.000000
Footnotes: F5, F6, F9

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 9 footnotes

Footnote F1

This amount reflects the number of shares acquired pursuant to dividend accruals during the vesting period.

Footnote F2

Shares withheld for taxes due on 4,213 shares issued.

Footnote F3

Shares withheld for taxes due on 9,910 shares issued.

Footnote F4

These performance stock units convert into shares of common stock on a 1-for-1 basis.

Footnote F5

These restricted stock units convert into shares of common stock on a 1-for-1 basis.

Footnote F6

These restricted stock units vest in three annual installments (33%, 33%, and 34%) beginning on the date shown.

Footnote F7

This option vests in three annual installments (33%, 33%, and 34%) beginning on the date shown.

Footnote F8

This option is 100% vested.

Footnote F9

Amount includes restricted stock units acquired pursuant to a dividend equivalent reinvestment feature.