Signal dossier · Q4 2025

BRK.B

Berkshire Hathaway · Financials

HoldLens verdict · single −100..+100 scale

SELL

−1

on a signed −100 sell scale · WEAK SELL

1 tracked manager selling. MODERATE sell signal.

Unified ConvictionScore · −100..+100

Smart money + insider + track record + trend + concentration + contrarian − dissent − crowding

−1

Buy component

Dissent penalty

−6

Unanimity bonus

Quality differential

-14

Info density

Buyers / Sellers

1 / 1

ConvictionScore v5 · 9-layer breakdown

13F superinvestor moves + Form 4 insider trades + 8-K material events. The SEC Signals trilogy.

−1

Smart money (13F)

Insider activity (Form 4)

Track record (CAGR)

-2

Trend streak

Concentration

Contrarian bonus

Event signal (8-K)

− Dissent penalty

−6

− Crowding penalty

−0

Owners: 2·Buyers: 5·Sellers: 6·Buyer-CAGR-weighted expected return: +11.3% ±1.4%·How this is computed

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8-quarter activity

Distinct managers buying or selling BRK.B each quarter — last 2 years.

1 buy moves·0 sell moves·net buying

'24 Q1

'24 Q2

'24 Q3

'24 Q4

'25 Q1

'25 Q2

'25 Q3

'25 Q4

Buyers (new + add)Sellers (trim + exit)

Ownership breadth · 8 quarters

Breadth flat

+0 owners over 8Q

Q1 '24

Q2 '24

Q3 '24

Q4 '24

Q1 '25

Q2 '25

Q3 '25

Q4 '25

The number of superinvestors holding this name has been stable for 8 quarters. See the most-owned names across all tracked managers →

Smart money activity

Every tracked 13F move on BRK.B — grouped by quarter, ranked by manager quality.

Smart money activity

5 buys · 6 sells across tracked 13F filings

Net signal: SELL

Q4 2025(2 moves)

Portfolio manager	Activity	Share change	% portfolio
Joel GreenblattElite Gotham Asset Management	Add 14.00%	+209K	0.40%
Chuck AkreTier 1 Akre Capital Management	Reduce 15.00%	-2K	0.10%

Q3 2025(2 moves)

Portfolio manager	Activity	Share change	% portfolio
David RolfeTier 1 Wedgewood Partners Adding Berkshire.	Add 6.00%	+38K	7.80%
Joel GreenblattElite Gotham Asset Management	Add 34.00%	+374K	0.50%

Q2 2025(2 moves)

Portfolio manager	Activity	Share change	% portfolio
Joel GreenblattElite Gotham Asset Management	Add 6.00%	+61K	0.40%
Chuck AkreTier 1 Akre Capital Management	Reduce 8.00%	-1K	0.10%

Q1 2025(2 moves)

Portfolio manager	Activity	Share change	% portfolio
Joel GreenblattElite Gotham Asset Management	Add 28.00%	+226K	0.60%
Bill Nygren Oakmark Funds	Reduce 12.00%	-4K	0.00%

Q4 2024(1 move)

Portfolio manager	Activity	Share change	% portfolio
Bill Nygren Oakmark Funds	Reduce 17.00%	-7K	0.00%

Q3 2024(1 move)

Portfolio manager	Activity	Share change	% portfolio
Bill Nygren Oakmark Funds	Reduce 9.00%	-4K	0.00%

Q2 2024(1 move)

Portfolio manager	Activity	Share change	% portfolio
Bill Nygren Oakmark Funds	Reduce 6.00%	-3K	0.00%

Insider activity

What the company's own executives and directors are doing — buys are highly bullish.

Latest news

Recent headlines for BRK.B — context for the moves above.

Who’s betting biggest on BRK.B

Financials sector →

Each bar is one manager’s position size in BRK.B as a % of their portfolio. Longer bar = bigger conviction bet. T1 badge marks the highest-quality track records.

Li Lu

16.2%

“Following the master.”

David RolfeT1

7.8%

“Buffett, at the source.”

AI thesis

An AI-synthesised investment thesis for BRK.B, based on the 13F data above. Generated on demand — not stored or pre-computed.

AI thesis

Claude Haiku synthesis of SELL positioning from 2 institutional filers

Generate a 2-paragraph investment thesis synthesising 2 institutional holdings and the -1 conviction score.

Related smart-money signals

Derived from the same 13F filings

Same sector · Financials

Top conviction in this sector

All Financials names →

Same owners hold these

Tickers owned by ≥2 of BRK.B's holders

1.GOOGAlphabet Class C
2 shared owners
-13

Full overlap matrix →

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The HoldLens signal dossier shows the unified −100..+100 ConvictionScore alongside live prices, multi-quarter trend detection, insider activity, and real-time news. Not investment advice. Methodology.