The wealthiest families we meet rarely got that way through diversification. They got there through concentration: a business built over decades, equity compensation accumulated through a career, or one investment conviction that proved spectacularly right. The world's large private banks treat the management of concentrated positions as a core discipline for exactly this reason, publishing extensively on single stock concentration after a company sale or public listing and building entire practices around it. The problem is universal; the Canadian tax wrapper around it is not.
The honest conversation about risk
Concentration risk is easy to acknowledge in the abstract and hard to act on in the specific, because the concentrated asset is usually the one that made you. The behavioural pull is to treat it as different in kind from ordinary risk. It is not. A single position, however familiar, carries risks that diversified capital does not: the fortunes of one management team, one industry cycle, one technology shift, one regulator. For an owner whose company is also their income, the concentration is doubled, since livelihood and net worth move together.
The practical question is never whether to respect what built the wealth. It is how much of the family's future should remain hostage to it. A useful discipline is to work backwards from independence: calculate the capital that, invested in a diversified portfolio, would fund your family's spending indefinitely. Capital beyond that number can stay concentrated with a clear conscience. Capital short of it deserves protection, because the downside is not a smaller fortune but a different life.
Managing around a private company
For business owners, the concentrated position cannot simply be trimmed on an exchange, which changes the toolkit rather than the logic.
The first tool is the portfolio itself. Personal and corporate investment capital should be built deliberately around what the company already is. An owner of a technology firm holding a portfolio tilted to technology has doubled a bet they may not know they made. The liquid portfolio's job is to own what the business does not: different sectors, different geographies, and enough high quality fixed income that a rough patch in the company never forces a bad decision. The planning principle is plain: personal wealth should be structured to be resilient to the business, not merely alongside it.
The second tool is extraction. Moving surplus cash out of the operating company, commonly to a holding company, both protects it from operating creditors and begins the diversification years before any sale. The rules matter here: investment income inside a corporation is taxed at high rates and, above the passive income threshold, begins to grind the small business deduction of an associated active business, a mechanism documented at length in professional tax guidance. Extraction and investment therefore need to be designed together, with your accountant on structure and your portfolio manager on what the extracted capital actually owns.
The third tool is the eventual exit, covered in our companion piece on business succession, where the lifetime capital gains exemption, at $1,275,000 per qualifying individual for 2026, finally converts concentration into diversified, taxable capital.
Managing around public stock and equity compensation
Executives accumulate concentration a grant at a time until, often around mid career, employer stock quietly becomes half of net worth. The Canadian mechanics reward method over impulse.
Stock option benefits are generally taxed as employment income when exercised, with a 50 per cent deduction where conditions are met, subject to the annual $200,000 vesting limit on favourable treatment for larger employers that has applied since mid 2021. Restricted share units are typically full income at vest, which means holding the shares afterwards is a fresh investment decision, not a tax strategy: you are choosing to invest that year's bonus in one stock. Framed that way, most executives sell at vest and diversify by default, which is precisely the discipline the private banks recommend.
For a long held public position with a large embedded gain, the choice is between paying tax on a schedule and carrying the risk. With the inclusion rate confirmed at one half after the government abandoned the proposed increase, the arithmetic is stable: realizing gains steadily across years, using both spouses' brackets, is usually cheaper than either a single year liquidation or the deemed disposition that otherwise arrives with the estate. Two Canadian refinements help around the edges. Tax loss selling elsewhere in the portfolio can absorb part of each year's realized gain. And donating appreciated shares in kind to charity eliminates the capital gain on the donated shares entirely while generating a receipt at full market value, a combination widely regarded as the most tax effective way for Canadians to give.
What a plan looks like
A written de-risking plan removes the two failure modes: doing nothing, and doing everything at the worst moment. It states the target, the schedule, and the exceptions in advance. A typical structure sets the independence number first, then reduces the concentrated position toward it over a defined period of years through scheduled sales, charitable gifts of the highest gain shares, and, for executives, automatic diversification of each vest. The point of the schedule is that it keeps working when the stock is up, when it is down, and when you are busy, which are the three conditions under which discretionary intentions reliably fail.
Concentration built the wealth. Deliberate, tax aware diversification is what keeps it. BlueSky Investment Counsel builds and manages exactly these plans for owners and executives, working alongside your accountant on the corporate and compensation mechanics. A complimentary Second-Opinion Portfolio Review will show you, in numbers, how exposed your family currently is to a single name, and what a schedule to fix it would look like. Call (416) 930-5550 or write to contact@blueskyic.com.
This article is general information, not tax or investment advice. Equity compensation and corporate tax rules are fact specific; obtain professional advice before acting.