Investors who evaluate Berkshire sometimes obsess on the details of our many and diverse businesses – our economic "trees," so to speak. Analysis of that type can be mind-numbing, given that we own a vast array of specimens, ranging from twigs to redwoods. A few of our trees are diseased and unlikely to be around a decade from now. Many others, though, are destined to grow in size and beauty.
Fortunately, it's not necessary to evaluate each tree individually to make a rough estimate of Berkshire's intrinsic business value. That's because our forest contains five "groves" of major importance, each of which can be appraised, with reasonable accuracy, in its entirety. Four of those groves are differentiated clusters of businesses and financial assets that are easy to understand. The fifth – our huge and diverse insurance operation – delivers great value to Berkshire in a less obvious manner, one I will explain later in this letter.
Before we look more closely at the first four groves, let me remind you of our prime goal in the deployment of your capital: to buy ably-managed businesses, in whole or part, that possess favorable and durable economic characteristics. We also need to make these purchases at sensible prices.
Sometimes we can buy control of companies that meet our tests. Far more often, we find the attributes we seek in publicly-traded businesses, in which we normally acquire a 5% to 10% interest. Our two-pronged approach to huge-scale capital allocation is rare in corporate America and, at times, gives us an important advantage.
In recent years, the sensible course for us to follow has been clear: Many stocks have offered far more for our money than we could obtain by purchasing businesses in their entirety. That disparity led us to buy about $43 billion of marketable equities last year, while selling only $19 billion. Charlie and I believe the companies in which we invested offered excellent value, far exceeding that available in takeover transactions.
Despite our recent additions to marketable equities, the most valuable grove in Berkshire's forest remains the many dozens of non-insurance businesses that Berkshire controls (usually with 100% ownership and never with less than 80%). Those subsidiaries earned $16.8 billion last year. When we say "earned," moreover, we are describing what remains after all income taxes, interest payments, managerial compensation (whether cash or stock-based), restructuring expenses, depreciation, amortization and home-office overhead.
For example, managements sometimes assert that their company's stock-based compensation shouldn't be counted as an expense. (What else could it be – a gift from shareholders?) And restructuring expenses? Well, maybe last year's exact rearrangement won't recur. But restructurings of one sort or another are common in business – Berkshire has gone down that road dozens of times, and our shareholders have always borne the costs of doing so. Abraham Lincoln once posed the question: "If you call a dog's tail a leg, how many legs does it have?" and then answered his own query: "Four, because calling a tail a leg doesn't make it one." Abe would have felt lonely on Wall Street. Charlie and I do contend that our acquisition-related amortization expenses of $1.4 billion (detailed on page K-84) are not a true economic cost. We add back such amortization "costs" to GAAP earnings when we are evaluating both private businesses and marketable stocks.
Berkshire's runner-up grove by value is its collection of equities, typically involving a 5% to 10% ownership position in a very large company. As noted earlier, our equity investments were worth nearly $173 billion at year-end, an amount far above their cost. If the portfolio had been sold at its year-end valuation, federal income tax of about $14.7 billion would have been payable on the gain. In all likelihood, we will hold most of these stocks for a long time. Eventually, however, gains generate taxes at whatever rate prevails at the time of sale.
A third category of Berkshire's business ownership are companies in which we share control with other parties. Our portion of the after-tax operating earnings of these businesses – 26.7% of Kraft Heinz, 50% of Berkadia and Electric Transmission Texas, and 38.6% of Pilot Flying Jets – totaled about $1.3 billion in 2018.
In our fourth grove, Berkshire held $112 billion at year-end in U.S. Treasury bills and other cash equivalents, and another $20 billion in miscellaneous fixed-income instruments. We consider a portion of that stash to be untouchable, having pledged to always hold at least $20 billion in cash equivalents to guard against external calamities. We have also promised to avoid any activities that could threaten our maintaining that buffer.
I believe Berkshire's intrinsic value can be approximated by summing the values of our four asset-laden groves and then subtracting an appropriate amount for taxes eventually payable on the sale of marketable securities. You may ask whether an allowance should not also be made for the major tax costs Berkshire would incur if we were to sell certain of our wholly-owned businesses. Forget that thought: It would be foolish for us to sell any of our wonderful companies even if no tax would be payable on its sale. Truly good businesses are exceptionally hard to find. Selling any you are lucky enough to own makes no sense at all.
Beyond that, much of our ownership of the first four groves is financed by funds generated from Berkshire's fifth grove – a collection of exceptional insurance companies. We call those funds "float," a source of financing that we expect to be cost-free – or maybe even better than that – over time. We will explain the characteristics of float later in this letter.
Let's now look further at Berkshire's most valuable grove – our collection of non-insurance businesses – keeping in mind that we do not wish to unnecessarily hand our competitors information that might be useful to them.
I will stick with pre-tax figures in this discussion. But our after-tax gain in 2018 from these businesses was far greater – 47% – thanks in large part to the cut in the corporate tax rate that became effective at the beginning of that year. Let's look at why the impact was so dramatic.
Begin with an economic reality: Like it or not, the U.S. Government "owns" an interest in Berkshire's earnings of a size determined by Congress. In effect, our country's Treasury Department holds a special class of our stock – call this holding the AA shares – that receives large "dividends" (that is, tax payments) from Berkshire. In 2017, as in many years before, the corporate tax rate was 35%, which meant that the Treasury was doing very well with its AA shares. Indeed, the Treasury's "stock," which was paying nothing when we took over in 1965, had evolved into a holding that delivered billions of dollars annually to the federal government. Last year, however, 40% of the government's "ownership" (14/35ths) was returned to Berkshire – free of charge – when the corporate tax rate was reduced to 21%. Consequently, our "A" and "B" shareholders received a major boost in the earnings attributable to their shares. This happening materially increased the intrinsic value of the Berkshire shares you and I own. The same dynamic, moreover, enhanced the intrinsic value of almost all of the stocks Berkshire holds.
Which suggests that we return to the performance of our non-insurance businesses. Our two towering redwoods in this grove are BNSF and Berkshire Hathaway Energy (90.9% owned). Combined, they earned $9.3 billion before tax last year, up 6% from 2017. You can read more about these businesses on pages K-5 – K-10 and pages K-40 – K-45.
Our next five non-insurance subsidiaries, as ranked by earnings (but presented here alphabetically), Clayton Homes, International Metalworking, Lubrizol, Marmon and Precision Castparts, had aggregate pre-tax income in 2018 of $6.4 billion, up from the $5.5 billion these companies earned in 2017.
The next five, similarly ranked and listed (Forest River, Johns Manville, MiTek, Shaw and TTI) earned $2.4 billion pre-tax last year, up from $2.1 billion in 2017.
The remaining non-insurance businesses that Berkshire owns – and there are many – had pre-tax income of $3.6 billion in 2018 vs. $3.3 billion in 2017.
Over time, Berkshire's funding base – that's the right-hand side of our balance sheet – should grow, primarily through the earnings we retain. Our job is to put the money retained to good use on the left-hand side, by adding attractive assets
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