How to Track What Buffett Bought in Q4 2025 Using 13F Filings

Why 13F Filings Are the Only Way to See Buffett's Moves

Warren Buffett doesn't tweet his trades. He doesn't publish a portfolio update. But four times a year, the SEC makes him.

Every institution managing over $100 million in US equities must file a Form 13F within 45 days of each quarter's end. For Berkshire Hathaway, that means we get a public snapshot of every stock Buffett holds — exact share counts, exact dollar values — once per quarter.

Berkshire's Q4 2025 13F shows $274.16B across 42 positions. This guide walks you through how to read it, what changed, and how to track Buffett's next move before most investors notice.

Step 1: Find the Filing on 13F Insight

The fastest way is to go directly to the Berkshire Hathaway filer page on 13F Insight. You'll see the full Q4 2025 portfolio sorted by position size, with percentage weights and quarter-over-quarter changes calculated automatically.

You can also pull it from the SEC's EDGAR system directly, but EDGAR gives you raw XML — you'll spend 20 minutes just formatting the data. 13F Insight does that work for you.

Step 2: Read the Top Holdings Table

Here's what Berkshire's Q4 2025 portfolio looks like at the top:

#	Ticker	Value	Weight	Shares
1	AAPL	$61.96B	22.6%	227.9M
2	AXP	$56.09B	20.5%	151.6M
3	BAC	$28.45B	10.4%	517.3M
4	KO	$27.96B	10.2%	400.0M
5	CVX	$19.84B	7.2%	130.2M
6	MCO	$12.60B	4.6%	24.7M
7	OXY	$10.89B	4.0%	264.9M

Five things stand out immediately:

• Apple is #1 at 22.6% — but Buffett has been trimming AAPL steadily since 2024. He held 905M shares in 2023; he's now at 227.9M. This is still a massive position, but it's a fraction of what it was.
• American Express is #2 at 20.5% — AXP has quietly become one of Berkshire's most important bets. It's a high-conviction, long-duration hold that most casual observers overlook.
• Coca-Cola hasn't moved in years — 400M shares, unchanged. KO is one of Buffett's "forever" positions. Don't expect him to ever sell it.
• Occidental Petroleum at $10.9B — OXY is Buffett's most active recent accumulation. He's been buying steadily since 2022 and now owns roughly 28% of the company.
• Top-5 concentration is 70.9% — Almost three-quarters of Berkshire's portfolio sits in just five names. This is classic Buffett: when you're confident, you concentrate.

Step 3: Look at What Changed Quarter-Over-Quarter

The raw holdings table tells you what Buffett owns. The QoQ changes tell you what he's doing. On 13F Insight's filer page, you'll see a "Changes" column showing additions, reductions, new positions, and full exits for each quarter.

For Q4 2025, pay attention to:

• New positions — Any ticker that didn't appear in Q3 2025 is something Buffett initiated in the last 90 days. These are high-signal moves: he was willing to start a new position at current prices.
• Large additions — If he added more than 10% to an existing position, that's a vote of confidence at current valuations.
• Reductions and exits — Buffett rarely sells unless he's either lost conviction or found better capital deployment. Full exits are rare and worth analyzing.

One important caveat: the 13F only shows long equity positions. Options, short positions, bonds, cash, and private holdings don't appear. Berkshire's famous cash pile — over $325B as of late 2024 — is completely invisible in the 13F. Don't mistake "no new positions" for "no activity."

Step 4: Understand the 45-Day Lag

This is where most investors make a mistake. When a Q4 13F is published (typically in mid-February), it reflects positions as of December 31. By the time you're reading it, Buffett may have already changed those positions.

What this means in practice:

• A "new position" in the 13F could have already been doubled, halved, or exited by the filing date.
• The 13F is a starting point for research, not a real-time signal.
• Use it to understand conviction and direction, not to copy exact entry points.

The best investors use 13F data to understand what types of companies Buffett is interested in, not to front-run his specific trades.

Step 5: Set Up Alerts for the Next Filing

Berkshire files quarterly. The Q1 2026 13F will reflect positions as of March 31, 2026, and must be filed by May 15, 2026. That's when you'll see whether Buffett added more OXY, whether the Apple trim continues, and whether any new positions appeared.

On 13F Insight, you can watch the Berkshire filer page and check back after each filing deadline. The platform updates automatically when new filings are processed from EDGAR.

Common Misconceptions About Buffett's 13F

Misconception 1: "If Buffett is buying, I should too"

Buffett is investing with a 10+ year horizon at a scale that makes entry price almost irrelevant. What he buys at $50B conviction isn't the same trade available to someone with $50K. Study the business logic, not the ticker.

Misconception 2: "His biggest position is his best idea"

Apple became #1 largely through price appreciation, not because Buffett kept adding. He's actually been reducing it. Position size reflects history as much as current conviction.

Misconception 3: "He sells when a stock is overvalued"

Buffett has explicitly said he doesn't like selling. When he does reduce, it's usually tax-related, regulatory (Occidental ownership caps), or a capital redeployment decision — not a valuation call.

How to Track Buffett's Portfolio on 13F Insight

Here's the simplest workflow:

1. Go to the Berkshire Hathaway filer page
2. Click through to the Q4 2025 holdings to see the full 42-position portfolio
3. Use the "Compare Quarters" feature to see exactly what changed from Q3 to Q4
4. Click any ticker (like OXY or AXP) to see which other institutions also hold that stock
5. Check back after May 15, 2026 for the Q1 2026 filing

The full Berkshire portfolio — every position, every quarter going back years — is available on 13F Insight. Free accounts can view current holdings. Pro accounts unlock historical comparison, concentration analytics, and cross-fund consensus signals.

Frequently Asked Questions

When does Berkshire's Q4 2025 13F come out?

Q4 13F filings are due 45 days after December 31 — so by February 14, 2026. Berkshire typically files right around the deadline. 13F Insight updates automatically when the filing is processed from EDGAR.

How many stocks does Buffett own?

As of Q4 2025, Berkshire holds 42 positions in its 13F portfolio, valued at $274.16B. The portfolio is highly concentrated — the top 5 positions account for 70.9% of the total value.

What is Buffett's largest holding right now?

Apple (AAPL) remains Berkshire's largest reported position at $61.96B (22.6% of the portfolio), though Buffett has significantly reduced the stake from its peak of 905M shares in 2023 to 227.9M shares in Q4 2025.

Can I see Buffett's cash position in the 13F?

No. 13F filings only disclose long equity positions. Berkshire's massive cash reserves — held in Treasury bills — do not appear in the 13F. For that, you need to read Berkshire's annual and quarterly reports (10-K and 10-Q).

How often does Buffett file a 13F?

Four times per year — within 45 days of the end of each calendar quarter. The four deadlines are mid-February (Q4), mid-May (Q1), mid-August (Q2), and mid-November (Q3).