Bank of Montreal reveals 8.36% Cable One (CABO) ownership stake

Rhea-AI Filing Summary

Bank of Montreal and its affiliates report a significant ownership position in Cable One, Inc. They disclose beneficial ownership of 471,442 shares of Cable One common stock, representing 8.36% of the outstanding class as of 12/31/2025.

Most of this stake is held through 1001271606 Ontario Inc. and Burgundy Asset Management, Inc., which together report 457,503 shares, or 8.11% of the class. The filing states the shares were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of Cable One.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Cable One, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

12685J105

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

Bank of Montreal

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

Unknown

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 344,369.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 471,442.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

471,442.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.35 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

BANK OF MONTREAL HOLDING INC.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CANADA (FEDERAL LEVEL)

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 345.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 345.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

345.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

BK

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

BMO NESBITT BURNS INC. WEALTH MANAGEMENT

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CANADA (FEDERAL LEVEL)

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 260.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 260.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

260.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

BD

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

BMO ASSET MANAGEMENT INC.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 260.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 260.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

260.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

BMO FINANCIAL CORP.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 12,112.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 12,276.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

12,276.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.21 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

BMO CAPITAL MARKETS CORP.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 11,870.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 11,870.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

11,870.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.21 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

BMO BANK N.A.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

ILLINOIS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 242.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 247.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

247.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

BMO FAMILY OFFICE, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 159.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

159.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

1001271606 ONTARIO INC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CANADA (FEDERAL LEVEL)

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 330,594.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 457,503.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

457,503.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.11 %

12

Type of Reporting Person (See Instructions)

HC

Comment for Type of Reporting Person: Position formerly disclosed under Burgundy Asset Management, Inc. BMO acquired Burgundy Asset Management, Inc. effective 05-Nov-2025.

SCHEDULE 13G

CUSIP No. 12685J105

1

Names of Reporting Persons

Burgundy Asset Management, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CANADA (FEDERAL LEVEL)

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 330,594.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 457,503.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

457,503.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.11 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: Position formerly disclosed under Burgundy Asset Management, Inc. BMO acquired Burgundy Asset Management, Inc. effective 05-Nov-2025.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Cable One, Inc.
(b)	Address of issuer's principal executive offices: 210 E. EARLL DRIVE, PHOENIX, ARIZONA 85012
Item 2.
(a)	Name of person filing: Bank of Montreal BANK OF MONTREAL HOLDING INC. BMO NESBITT BURNS INC. WEALTH MANAGEMENT BMO ASSET MANAGEMENT INC. BMO FINANCIAL CORP. BMO CAPITAL MARKETS CORP. BMO BANK N.A. BMO FAMILY OFFICE, LLC 1001271606 ONTARIO INC Burgundy Asset Management, Inc.
(b)	Address or principal business office or, if none, residence: 1 First Canadian Place Toronto, Ontario, Canada M5X1A1
(c)	Citizenship: Bank of Montreal - UNKNOWN BANK OF MONTREAL HOLDING INC. - CANADA (FEDERAL LEVEL) BMO NESBITT BURNS INC. WEALTH MANAGEMENT - CANADA (FEDERAL LEVEL) BMO ASSET MANAGEMENT INC. - ONTARIO, CANADA BMO FINANCIAL CORP. - DELAWARE BMO CAPITAL MARKETS CORP. - DELAWARE BMO BANK N.A. - ILLINOIS BMO FAMILY OFFICE, LLC - DELAWARE 1001271606 ONTARIO INC - CANADA (FEDERAL LEVEL) Burgundy Asset Management, Inc. - CANADA (FEDERAL LEVEL)
(d)	Title of class of securities: Common Stock, par value $0.01 per share
(e)	CUSIP No.: 12685J105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 471,442
(b)	Percent of class: 8.36 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Bank of Montreal - 344,369 BANK OF MONTREAL HOLDING INC. - 345 BMO NESBITT BURNS INC. WEALTH MANAGEMENT - 260 BMO ASSET MANAGEMENT INC. - 260 BMO FINANCIAL CORP. - 12,112 BMO CAPITAL MARKETS CORP. - 11,870 BMO BANK N.A. - 242 BMO FAMILY OFFICE, LLC - 0 1001271606 ONTARIO INC - 330,594 Burgundy Asset Management, Inc. - 330,594
	(ii) Shared power to vote or to direct the vote: Bank of Montreal - 0 BANK OF MONTREAL HOLDING INC. - 0 BMO NESBITT BURNS INC. WEALTH MANAGEMENT - 0 BMO ASSET MANAGEMENT INC. - 0 BMO FINANCIAL CORP. - 0 BMO CAPITAL MARKETS CORP. - 0 BMO BANK N.A. - 0 BMO FAMILY OFFICE, LLC - 0 1001271606 ONTARIO INC - 0 Burgundy Asset Management, Inc. - 0
	(iii) Sole power to dispose or to direct the disposition of: Bank of Montreal - 471,442 BANK OF MONTREAL HOLDING INC. - 345 BMO NESBITT BURNS INC. WEALTH MANAGEMENT - 260 BMO ASSET MANAGEMENT INC. - 260 BMO FINANCIAL CORP. - 12,276 BMO CAPITAL MARKETS CORP. - 11,870 BMO BANK N.A. - 247 BMO FAMILY OFFICE, LLC - 159 1001271606 ONTARIO INC - 457,503 Burgundy Asset Management, Inc. - 457,503
	(iv) Shared power to dispose or to direct the disposition of: Bank of Montreal - 0 BANK OF MONTREAL HOLDING INC. - 0 BMO NESBITT BURNS INC. WEALTH MANAGEMENT - 0 BMO ASSET MANAGEMENT INC. - 0 BMO FINANCIAL CORP. - 0 BMO CAPITAL MARKETS CORP. - 0 BMO BANK N.A. - 0 BMO FAMILY OFFICE, LLC - 0 1001271606 ONTARIO INC - 0 Burgundy Asset Management, Inc. - 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Documents.
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Each reporting person may be deemed to be a member of a group with respect to the issuer or securities of the issuer for the purposes of Section 13(d) or 13(g) of the Act. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act) with any other person as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding, or disposing of securities of the issuer or otherwise with respect to the issuer or any securities of the issuer or (ii) a member of any syndicate or group with respect to the issuer or any securities of the issuer.
Item 9.	Notice of Dissolution of Group.
	Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5. Each reporting person may be deemed to be a member of a group with respect to the issuer or securities of the issuer for the purposes of Section 13(d) or 13(g) of the Act. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act) with any other person as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding, or disposing of securities of the issuer or otherwise with respect to the issuer or any securities of the issuer or (ii) a member of any syndicate or group with respect to the issuer or any securities of the issuer.

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Bank of Montreal

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

BANK OF MONTREAL HOLDING INC.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

BMO NESBITT BURNS INC. WEALTH MANAGEMENT

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

BMO ASSET MANAGEMENT INC.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

BMO FINANCIAL CORP.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

BMO CAPITAL MARKETS CORP.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

BMO BANK N.A.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

BMO FAMILY OFFICE, LLC

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

1001271606 ONTARIO INC

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

Burgundy Asset Management, Inc.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	02/12/2026

FAQ

What stake in Cable One (CABO) does Bank of Montreal report?

Bank of Montreal reports beneficial ownership of 471,442 Cable One shares, equal to 8.36% of the common stock class as of December 31, 2025. This reflects a sizable institutional position disclosed on a Schedule 13G filing.

Which Bank of Montreal entities hold Cable One (CABO) shares?

Cable One shares are reported across several Bank of Montreal affiliates, including Bank of Montreal, BMO Financial Corp., BMO Capital Markets Corp., BMO Bank N.A., and others. The largest positions are reported by 1001271606 Ontario Inc. and Burgundy Asset Management, Inc..

How large is the Burgundy Asset Management position in Cable One (CABO)?

Burgundy Asset Management, Inc. and 1001271606 Ontario Inc. each report 457,503 Cable One shares, representing 8.11% of the common stock. The filing notes this position was formerly disclosed under Burgundy Asset Management before its acquisition by Bank of Montreal.

Is Bank of Montreal seeking control of Cable One (CABO) with this stake?

The filing states the shares were acquired and are held in the ordinary course of business and not for the purpose or effect of changing or influencing control of Cable One. It also clarifies they are not part of a control-seeking transaction.

What voting power does Bank of Montreal report in Cable One (CABO)?

Bank of Montreal reports sole voting power over 344,369 Cable One shares and sole dispositive power over 471,442 shares. No shared voting or dispositive power is reported by any of the listed Bank of Montreal entities.

Why was Burgundy Asset Management’s Cable One (CABO) position reclassified?

The filing explains that the position was formerly disclosed under Burgundy Asset Management, Inc.. Bank of Montreal acquired Burgundy Asset Management effective November 5, 2025, so the holding is now reported within the Bank of Montreal reporting group.