Mabowitz Eric H 4

4 · FIRST US BANCSHARES, INC. · Filed Jul 9, 2026

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Updated Jul 9, 2026

FUSB Exec Eric Mabowitz Exercises Options, Shares Withheld for Taxes

What Happened

Eric H. Mabowitz, SEVP, Chief Risk Officer, Chief Compliance Officer & CRA Officer of First US Bancshares, exercised a total of 11,600 stock options on 2026-07-08, acquiring 11,600 shares. The exercises show option strike amounts of $14.11 (5,000 shares), $11.71 (3,600 shares) and $10.01 (3,000 shares) for a combined exercise cost of $142,736.
To satisfy tax and/or exercise-price obligations, 9,353 shares were surrendered/withheld (reported as dispositions) at a market/withholding price of $16.95, with a total value of approximately $158,533. After withholding, Mabowitz retained a net 2,247 shares from these transactions.
These are option-exercise transactions (code M) with accompanying tax-withholding/share-for-tax entries (code F); not an open-market purchase or sale for investment purposes.

Key Details

Transaction date: 2026-07-08 (Form filed 2026-07-09; filing appears timely).
Options exercised:
- 5,000 shares @ $14.11 = $70,550
- 3,600 shares @ $11.71 = $42,156
- 3,000 shares @ $10.01 = $30,030
- Total exercise cost: $142,736
Shares withheld/disposed for taxes or payment (F):
- 4,408 shares @ $16.95 = $74,716
- 2,813 shares @ $16.95 = $47,680
- 2,132 shares @ $16.95 = $36,137
- Total withheld value: $158,533
Net shares retained from this event: 11,600 exercised − 9,353 withheld = 2,247 shares.
Footnotes: F1 = Voya is record keeper for the company 401(k) as of 7/8/2026. F2–F4 = option grant dates (2/22/2017; 2/12/2018; 2/27/2019) and standard vesting in equal installments over three years.
Shares owned after the transactions are not specified in the provided filing excerpt.

Context

This is an options exercise with shares withheld to cover tax/withholding obligations (a common cashless-type result), not a directional open-market purchase or sale by the insider. The derivative entries reported at $0 reflect cancellation of the exercised options.
For retail investors: exercises followed by withholding are routine and do not necessarily signal a bullish or bearish view; they often reflect option vesting and standard tax withholding practices.

Form 4

Period: 2026-07-08

SEVP, CRO, CCO, & CRA Officer

Transactions

Exercise/Conversion
Common Stock, $.01 par value
2026-07-08$14.11/sh+5,000$70,550→ 23,710 total
Tax Payment
Common Stock, $.01 par value
2026-07-08$16.95/sh−4,408$74,716→ 19,302 total
Exercise/Conversion
Common Stock, $.01 par value
2026-07-08$11.71/sh+3,600$42,156→ 22,902 total
Tax Payment
Common Stock, $.01 par value
2026-07-08$16.95/sh−2,813$47,680→ 20,089 total
Exercise/Conversion
Common Stock, $.01 par value
2026-07-08$10.01/sh+3,000$30,030→ 23,089 total
Tax Payment
Common Stock, $.01 par value
2026-07-08$16.95/sh−2,132$36,137→ 20,957 total
Exercise/Conversion
Stock Option (right to buy)
[F2]
2026-07-08−5,000→ 0 total
Exercise: $14.11From: 2018-02-22Exp: 2027-02-22→ Common Stock, $.01 par value (5,000 underlying)
Exercise/Conversion
Stock Option (right to buy)
[F3]
2026-07-08−3,600→ 0 total
Exercise: $11.71From: 2019-02-12Exp: 2028-02-12→ Common Stock, $.01 par value (3,600 underlying)
Exercise/Conversion
Stock Option (right to buy)
[F4]
2026-07-08−3,000→ 0 total
Exercise: $10.01From: 2020-02-27Exp: 2029-02-27→ Common Stock, $.01 par value (3,000 underlying)

Holdings

Footnotes (4)

[F1]Based on information provided by Voya, the record keeper of the First US Bancshares, Inc. 401(k) Plan as of 7/8/2026.
[F2]These options were granted on 2/22/2017, and vested in equal installments on each of the first three anniversaries of the date of grant.
[F3]These options were granted on 2/12/2018, and vested in equal installments on each of the first three anniversaries of the date of grant.
[F4]These options were granted on 2/27/19, and vested in equal installments on each of the first three anniversaries of the date of grant.

Signature

/s/Beverly J. Dozier, by power of attorney|2026-07-09

1 file