Subsector

551 Management of companies and enterprises

Gestion de sociétés et d'entreprises

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Industry group

Management of companies and enterprises

This industry group comprises (1) legal entities engaged only in holding the securities of subsidiaries and affiliates for the purpose of o...

Industries 1

Canadian industries 2

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Official definition

This subsector comprises (1) legal entities engaged only in holding the securities of subsidiaries and affiliates for the purpose of owning a controlling interest or influencing the management decisions of these businesses, or (2), establishments primarily engaged in administering, overseeing, and managing other establishments of the company or enterprise and which may also hold the securities of their subsidiaries and affiliates. A characteristic of economic units in this sector is that all activities are focused on serving the economic units of the enterprise group, that is, they do not provide services to unaffiliated establishment.

Classification Reference

Official classification fields for this page

Official classification fields taken from the current StatCan source bundle.

Characteristic	Description
Official title	Management of companies and enterprises
Classification	NAICS Canada 2022 Version 1.0
Publishing authority	Statistics Canada
Hierarchical level	Subsector
Parent code	55 - Management of companies and enterprises
International correspondence	ISIC Rev. 4; harmonized with US and Mexico NAICS at higher levels.
Source	https://www.statcan.gc.ca/en/subjects/standard/naics/2022/v1/index
Source verification	2026-05-05

Canada Business Context

Canada-wide tax and filing context

Canada-wide business, tax, and filing context from the local country pack and tax pack.

Characteristic	Description
Tax authority	Canada Revenue Agency (CRA)
Business identifier	Business Number (BN): 9-digit identifier with program account suffixes such as RT0001 for GST/HST, RP0001 for payroll, and RC0001 for corporate income tax.
Filing requirements	Business Number registration; Form T2125 (Statement of Business or Professional Activities) attached to T1; Form T2 (Corporation Income Tax Return); Form T5013; Form GST34
Sector authority	No cluster authority recorded in the local country pack.

Classification Confidence Score

3 of 5 factors passing

6/ 10

Verified official source — naics-scian-2022-structure-v1-eng.csv (2026-05-05)

International crosswalk — No international correspondence found

Previous edition migration — NAICS 2017 to 2022 continuity confirmed

Complete hierarchy — 2 levels confirmed in hierarchy

Size or threshold documented — Not applicable for hub levels

Trade or export match — No direct HS code correspondence in current bundle

Legacy crosswalk — Legacy system (SIC 1980) retired in this region

Business Profiles

When you might need code 551

Professions specific to this sector are linked to this part of the Canadian classifier so the page speaks to real work teams.

01 551

Regional portfolio chief

Use this page when the file covers multi-entity oversight, investment reviews, operating mandates, and capital allocation. It helps confirm whether 551 Management of companies and enterprises is the closest NAICS Canada branch before BN registration, GST/HST review, banking onboarding, procurement notes, or internal classification work.

02 551

Shared services director

Use this page when the file covers centralized HR, finance, procurement, internal service delivery, and operating controls. It helps confirm whether 551 Management of companies and enterprises is the closest NAICS Canada branch before BN registration, GST/HST review, banking onboarding, procurement notes, or internal classification work.

03 551

Corporate strategy manager

Use this page when the file covers portfolio planning, acquisition reviews, group initiatives, and executive reporting. It helps confirm whether 551 Management of companies and enterprises is the closest NAICS Canada branch before BN registration, GST/HST review, banking onboarding, procurement notes, or internal classification work.

04 551

Holding company controller

Use this page when the file covers consolidated oversight, intercompany reporting, group finance packages, and board files. It helps confirm whether 551 Management of companies and enterprises is the closest NAICS Canada branch before BN registration, GST/HST review, banking onboarding, procurement notes, or internal classification work.

Business Map

Business categories in this branch

A rotating set of business activity examples linked to this part of the Canadian hierarchy.

In this section

551Management of companies and enterprises

Source row

551Management of companies and enterprises

This page mirrors the source row from the structure CSV and the matching rows from the elements and crosswalk files.

Frequently asked questions

What does code 551 cover?

Management of companies and enterprises: This subsector comprises (1) legal entities engaged only in holding the securities of subsidiaries and affiliates for the purpose of owning a controlling interest or influencing the management decisions of these businesses, or (2), establishments primarily en...

Which level of the hierarchy is 551?

It is a subsector page in the NAICS Canada 2026 hierarchy.

What is the parent of 551?

It rolls up to 55 Management of companies and enterprises.

Should I stop at 551 or go lower?

1 lower-level item(s) sit under this branch: Management of companies and enterprises.

Are official inclusion notes attached to 551?

No inclusion rows are attached to this page in the local elements file.

Are there exclusion notes for 551?

No exclusion rows are attached to this page in the local elements file.

Does 551 include illustrative examples?

No example rows are attached on this page in the local elements file.

What kinds of businesses often start from this page?

Examples in this branch include Security work, Travel support, Facilities services, Employment services, Remediation services, Administrative support.

Is there an ISIC mapping for 551?

No ISIC correspondence row is attached to this page.

Does this page show a US NAICS reference?

No same-code US NAICS reference row is attached on this page.

Why are both English and French titles shown?

NAICS Canada is bilingual, so the page keeps both language titles visible for comparison and lookup.

Where does the page text come from?

From the local StatCan structure file, elements file, ISIC crosswalk, and the bundled US 6-digit reference workbook.