Christopher J. Arntzen - 01 Aug 2026 Form 4 Insider Report for Cable One, Inc. (CABO)

Reporting relationship: Chief Legal Officer, Secretary
Issuer ticker: CABO
Reported as of: 01 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Aug 2026, 16:52:28 UTC
Prior SEC filing: 06 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Christopher J. Arntzen

Key filing fact

Christopher J. Arntzen filed Form 4 for Cable One, Inc. (CABO) on 04 Aug 2026.

Key facts

This page summarizes Christopher J. Arntzen's Form 4 filing for Cable One, Inc. (CABO).
3 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 04 Aug 2026, 16:52.

Change

Previous filing in this sequence was filed on 06 Jan 2026.
Current net transaction value: $0.

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 0002044745 Primary reporting owner

Arntzen Christopher J

Relationship: Chief Legal Officer, Secretary
Address: C/O CABLE ONE, INC., 210 E. EARLL DRIVE, PHOENIX
Signature: /s/ Christopher J. Arntzen
Signature date: 04 Aug 2026

Reported non-derivative transactions

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

CABO transaction

Common Stock, par value $0.01

Tax liability

Transaction value
Shares: -40
Change %: -2.1%
Price: $39.99^*
Shares after: 1,843
Date: 01 Aug 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

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

CABO transaction Derivative

Phantom RSUs

Award

Transaction value
Shares: +10,002
Change %: +200%
Price: $0.000000^*
Shares after: 14,994
Date: 01 Aug 2026
Ownership: Direct
Underlying class: Common Stock, par value $0.01
Underlying amount: 10,002
Exercise price
Footnotes: F2, F3

CABO transaction Derivative

Phantom PSUs

Award

Transaction value
Shares: +15,003
Change %: +200%
Price: $0.000000^*
Shares after: 22,491
Date: 01 Aug 2026
Ownership: Direct
Underlying class: Common Stock, par value $0.01
Underlying amount: 15,003
Exercise price
Footnotes: F2, F4

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Represents the withholding of shares of Common Stock to satisfy the tax withholding liability associated with the vesting of an award of restricted stock units, which was granted on August 1, 2024 and that generally vests in two equal installments on each of the first two anniversaries of the grant date, subject to the Reporting Person's continued employment through each such date.

Footnote F2

Each phantom service-based restricted stock unit (a Phantom RSU) and each phantom performance-based restricted stock unit (a Phantom PSU) represents a contingent right to receive the economic value of one share of Common Stock, with each solely settled in cash.

Footnote F3

Represents a grant of 10,002 Phantom RSUs on August 1, 2026, which generally vest in substantially equal installments on (i) January 3, 2027; (ii) January 3, 2028; and (iii) January 3, 2029, subject to the Reporting Person's continued employment through the applicable vesting date.

Footnote F4

Represents a grant of 15,003 Phantom PSUs on August 1, 2026, that vest based on target achievement of applicable performance goals over the three-year performance period commencing January 1, 2026 and ending December 31, 2028, subject to certification of performance achievement by the Compensation and Talent Management Committee of Cable One, Inc. and the Reporting Persons continued employment through the date of such certification.