Bank of Montreal group files 13G showing 3.51M CBIZ holdings (CBZ)

Rhea-AI Filing Summary

CBIZ, Inc. Schedule 13G reports that a Bank of Montreal group of entities beneficially owns 3,508,094 shares of CBIZ common stock, representing 7% of the class. The filing breaks out voting and dispositive powers across related BMO entities and affiliated holders, with 2,549,917 shares held with sole voting power by Bank of Montreal and 3,505,334 shares held with sole dispositive power by 1001271606 Ontario Inc. The filing is signed by Kathryn Cenac on behalf of the reporting persons.

Key Figures

Beneficial ownership: 3,508,094 shares Percent of class: 7% Sole voting power (Bank of Montreal): 2,549,917 shares +3 more

6 metrics

Beneficial ownership 3,508,094 shares Item 4 aggregate beneficially owned

Percent of class 7% Item 4 percent of class

Sole voting power (Bank of Montreal) 2,549,917 shares Item 4(i) sole power to vote

Sole dispositive power (1001271606 Ontario Inc) 3,505,334 shares Item 4(iii) sole power to dispose

CUSIP 124805102 Security identifier listed on cover

Signature date 05/13/2026 Filing signed by Kathryn Cenac

Key Terms

Schedule 13G, beneficially owned, sole dispositive power, sole voting power

4 terms

Schedule 13G regulatory

"Item 1. Name of issuer: CBIZ, Inc.; form header"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

beneficially owned regulatory

"Item 4. Ownership (a) Amount beneficially owned: 3,508,094"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power regulatory

"Item 4(iii) Sole power to dispose or to direct the disposition of:"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

sole voting power regulatory

"Item 4(i) Sole power to vote or to direct the vote: Bank of Montreal - 2,549,917"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

CBIZ, Inc.

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

124805102

(CUSIP Number)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 124805102

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 2,549,917.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,508,094.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,508,094.00

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)

6.37 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 124805102

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 93.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 93.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

93.00

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 Number(s): 124805102

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

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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 Number(s): 124805102

1

Names of Reporting Persons

BMO NESBITT BURNS 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 93.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 93.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

93.00

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 Number(s): 124805102

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 397.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,671.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,671.00

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 Number(s): 124805102

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 100.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 100.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

100.00

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 Number(s): 124805102

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 297.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 301.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

301.00

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 Number(s): 124805102

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 2,270.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,270.00

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 Number(s): 124805102

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 2,549,431.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,505,334.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,505,334.00

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)

6.36 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 124805102

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 2,549,431.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,505,334.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,505,334.00

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)

6.36 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CBIZ, Inc.
(b)	Address of issuer's principal executive offices: 5959 ROCKSIDE WOODS BLVD N., SUITE 600, INDEPENDENCE, OHIO 44131
Item 2.
(a)	Name of person filing: Bank of Montreal BANK OF MONTREAL HOLDING INC. BMO NESBITT BURNS INC. WEALTH MANAGEMENT BMO NESBITT BURNS 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 NESBITT BURNS INC. - CANADA (FEDERAL LEVEL) 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
(e)	CUSIP Number(s): 124805102
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: 3,508,094
(b)	Percent of class: 7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Bank of Montreal - 2,549,917 BANK OF MONTREAL HOLDING INC. - 93 BMO NESBITT BURNS INC. WEALTH MANAGEMENT - 0 BMO NESBITT BURNS INC. - 93 BMO FINANCIAL CORP. - 397 BMO CAPITAL MARKETS CORP. - 100 BMO BANK N.A. - 297 BMO FAMILY OFFICE, LLC - 0 1001271606 ONTARIO INC - 2,549,431 Burgundy Asset Management, Inc. - 2,549,431
	(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 NESBITT BURNS 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 - 3,508,094 BANK OF MONTREAL HOLDING INC. - 93 BMO NESBITT BURNS INC. WEALTH MANAGEMENT - 0 BMO NESBITT BURNS INC. - 93 BMO FINANCIAL CORP. - 2,671 BMO CAPITAL MARKETS CORP. - 100 BMO BANK N.A. - 301 BMO FAMILY OFFICE, LLC - 2,270 1001271606 ONTARIO INC - 3,505,334 Burgundy Asset Management, Inc. - 3,505,334
	(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 NESBITT BURNS 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:	05/13/2026

BANK OF MONTREAL HOLDING INC.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

BMO NESBITT BURNS INC. WEALTH MANAGEMENT

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

BMO NESBITT BURNS INC.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

BMO FINANCIAL CORP.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

BMO CAPITAL MARKETS CORP.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

BMO BANK N.A.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

BMO FAMILY OFFICE, LLC

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

1001271606 ONTARIO INC

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

Burgundy Asset Management, Inc.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	05/13/2026

FAQ

How many CBIZ (CBZ) shares does Bank of Montreal report owning?

Bank of Montreal group reports beneficial ownership of 3,508,094 shares. The Schedule 13G states this equals 7% of the class and is the aggregate beneficially owned across the listed reporting persons as of the filing.

What voting power does Bank of Montreal hold in CBIZ?

Bank of Montreal reports sole voting power over 2,549,917 shares. The filing lists per-entity allocations of voting power across BMO subsidiaries and affiliated entities in the group.

Which affiliated entities are listed as holding CBIZ shares?

The filing lists multiple BMO-related entities including 1001271606 Ontario Inc and Burgundy Asset Management, Inc. Several subsidiaries show discrete sole dispositive or voting powers in the disclosure.

What percent of CBIZ does the reported position represent?

The aggregated position equals 7% of the class. That percent is reported alongside the 3,508,094 share count in Item 4 of the Schedule 13G disclosure.

Who signed the Schedule 13G for these reporting persons?

Kathryn Cenac, Managing Director - Regulatory Solutions Group, signed the filing. The filing includes multiple signatures with the same name and title dated 05/13/2026.