Berkshire Piles $17 Billion Into Alphabet:
The Oracle's Successor Bets on AI — 3 Things to Know Before You Follow

A Conservative Giant Bets on AI —
What's the Signal?

There's an important detail to clear up first: the person at the helm is no longer Buffett himself, but his successor Greg Abel. Since formally taking over this year, Abel has gone his own way — adding to AI, airlines and real estate. The move the market is watching most closely is his addition to Alphabet.

Why is this so striking? Because Berkshire has long been famous for "not buying tech stocks" — Buffett spent his whole life avoiding what he didn't understand. It wasn't until the third quarter of 2025 that Berkshire first bought Alphabet, a rare bet of about $4.9 billion. Now Abel has pushed that to $17 billion, turning Alphabet from a "newcomer" into the "third-largest position" in just a few quarters.

The signal isn't "copy this blindly" — it's this: even the most conservative money is starting to recognise the long-term value of AI giants.

Before You Follow,
Understand the 3 Pitfalls of 13F Filings

Retail investors often fall for a common illusion: see the big institutions' mandatory quarterly 13F filings and just copy their trades. But there are three pitfalls to think through first.

First, the information is stale. A 13F discloses the portfolio as of 30 June, and it only comes out in mid-August — the stock price may have already moved a lot in that six-week gap.

Second, your entry price is different. You know how many shares they bought, but not their average price. They may have accumulated slowly at the lows, while you buy at the highs.

Third, your time horizon is different. Berkshire can hold for five or ten years, and a 30% drawdown doesn't bother them; a retail investor may panic at a 10% drop.

Copy-trading itself isn't wrong — what's wrong is copying without thinking it through.

The Homebuilder Swap —
How to Pick Within the Same Sector

There's another detail worth learning in this 13F: Berkshire swapped positions within homebuilders — exiting D.R. Horton while adding to Lennar.

Both are large US homebuilders, seemingly similar. But which one Berkshire picks is a live demonstration of something retail investors often ignore: within the same sector, valuations and financial health can differ enormously.

Retail investors tend to "pick a name they know" or "pick the leader", but the real work is comparing two companies' valuations, debt and growth. Berkshire's swap is a textbook example.

What Should You Do?
Do Your Own Maths, Don't Just Follow

At the end of the day, the biggest lesson from this news isn't "buy Alphabet" — it's "do your homework before you follow".

What famous investors buy is always a reference, never an answer. Their entry price, position size and time horizon are completely different from yours. Your job is to judge for yourself whether a company is worth buying — look at its P/E ratio, market cap and growth prospects, then decide whether you're willing to pay this price.

You don't need to guess by feel — FinKit's stock valuation calculator can do it.