Christopher J. Arntzen - 03 Jan 2026 Form 4 Insider Report for Cable One, Inc. (CABO)

Reporting relationship: SVP, GC & Secretary
Issuer ticker: CABO
Reported as of: 03 Jan 2026
Net transaction value: -$16,770
SEC form: 4
Accepted by SEC: 06 Jan 2026, 16:04:14 UTC
Prior SEC filing: 01 Oct 2025
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 06 Jan 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: 06 Jan 2026, 16:04.

Change

Previous filing in this sequence was filed on 01 Oct 2025.
Current net transaction value: -$16,770.

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: SVP, GC & Secretary
Address: C/O CABLE ONE, INC., 210 E. EARLL DRIVE, PHOENIX
Signature: /s/ Christopher J. Arntzen
Signature date: 06 Jan 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: $16,770
Shares: -161
Change %: -7.9%
Price: $104.16
Shares after: 1,883
Date: 03 Jan 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: $0
Shares: +4,992
Change %
Price: $0.000000
Shares after: 4,992
Date: 03 Jan 2026
Ownership: Direct
Underlying class: Common Stock, par value $0.01
Underlying amount: 4,992
Exercise price
Footnotes: F2, F3

CABO transaction Derivative

Phantom PSUs

Award

Transaction value: $0
Shares: +7,488
Change %
Price: $0.000000
Shares after: 7,488
Date: 03 Jan 2026
Ownership: Direct
Underlying class: Common Stock, par value $0.01
Underlying amount: 7,488
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

See Remarks.

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 4,992 Phantom RSUs on January 3, 2026, which generally vest in substantially equal installments on each of the first three anniversaries of the grant date, subject to the Reporting Persons continued employment through the applicable vesting date.

Footnote F4

Represents a grant of 7,488 Phantom PSUs on January 3, 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.

SEC remarks

Represents the withholding of shares of Common Stock to satisfy tax withholding liability associated with the vesting of (i) restricted stock awards from previously reported grants, which were granted on January 3, 2022 which generally vest in four equal installments on each of the first four anniversaries of the respective date of grant, subject to the Reporting Person's continued employment with Cable One, Inc. through each such date, and (ii) restricted stock units from previously reported grants, which were granted on January 3, 2023 and 2025, which generally vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued employment with Cable One, Inc. through each such date, and (iii) restricted stock units from previously reported grants, which were granted on January 3, 2024, which generally vest in two equal installments on each of the first two anniversaries of the date of grant, subject to the Reporting Person's continued employment with Cable One, Inc. through each such date.