Stock profile

BERKSHIRE HATHAWAY INC-CL B (BRK.B)

BRK.B · Latest close $501.19 as of Oct 2, 2026 · 13F data as of Jun 30, 2026 (2026 Q2)
Latest close
$501.19
As of Oct 2, 2026
Tracked funds holding
26 of 83
2026 Q2 13F filings
Opened / added
0 / 11
vs previous quarter
Trimmed / exited
10
vs previous quarter

Super-investor holdings · 2026 Q2

FundPortfolio weightSharesChange vs prev. quarter
Aquamarine Capital33.89%97,600HELD
H&H International Investment24.18%9,229,696ADDED (+0.9%)
Bill & Melinda Gates Foundation Trust21.35%14,689,844TRIMMED (-13.8%)
Semper Augustus15.45%273,145ADDED (+8.0%)
Himalaya Capital Management14.98%1,108,318ADDED (+23.5%)
Check Capital Management14.95%1,119,075ADDED (+1.0%)
Weitz Investment Management9.41%271,600TRIMMED (-2.6%)
Yacktman Asset Management7.19%1,161,530ADDED (+268.8%)
Gardner Russo & Quinn6.05%1,079,364TRIMMED (-2.8%)
Markel Group5.84%1,531,971HELD
Muhlenkamp5.58%38,495ADDED (+0.4%)
Giverny Capital4.18%248,447TRIMMED (-34.4%)
Tweedy Browne3.70%97,625ADDED (+0.2%)
Sound Shore3.14%203,903ADDED (+2.2%)
Fairholme Capital2.95%87,852ADDED (+74.1%)
Century Management2.38%22,466TRIMMED (-4.3%)
Ruane Cunniff LP2.34%300,672TRIMMED (-3.1%)
Davis Advisors1.59%738,433TRIMMED (-1.5%)
Chou Associates0.72%3,100HELD
Matrix Asset Advisors0.47%11,645ADDED (+0.4%)
Torray Funds0.19%2,884HELD
Mairs & Power Funds0.11%23,590TRIMMED (-1.4%)
Akre Capital Management0.08%8,184TRIMMED (-20.8%)
First Eagle Investment Management0.06%67,626ADDED (+17.4%)
Oakmark Funds0.02%25,253TRIMMED (-0.7%)
Dodge & Cox Funds0.00%11,440HELD

Source: SEC Form 13F filings for the quarter ended Jun 30, 2026. Change labels compare each fund’s 2026 Q2 filing with its previous filing. 13F filings cover long positions only and arrive up to 45 days after quarter-end.

All institutions · Form 13F

Institutions holding4,918 of 8,857 filers
Long-only filers among them4,905
Change vs 2026 Q1+116 net · 2,009 entered · 1,893 exited
Shares reported, all filers913,901,917
Reported value, all filers$462.2B

Source: SEC Form 13F data sets — every filer's latest report for the quarter ended Jun 30, 2026, not just the tracked funds above; changes compare with the quarter ended Mar 31, 2026. Share counts and values are summed as reported in the filings (a small number of filers report values in thousands of dollars, so value totals are as-filed sums).

Insider trading · Form 4

1 insiders bought on the open market in the last 90 days (3 purchases, $250.1K), against 0 sales by 0 insiders ($0). Latest buy: Aug 12, 2026.

Source: SEC Form 4 filings, as of Oct 3, 2026. Open-market transactions only.

Politician trading · U.S. House

2 House members reported buying (4 purchases vs 1 sales). Bought by Republicans. Latest buy: Aug 7, 2026.

Source: U.S. House Clerk STOCK Act periodic transaction reports, as of Oct 3, 2026. Reported amounts are ranges, and reports can arrive up to 45 days after the trade. Senate reports are not included yet.

Screens & lenses

Insiders

· Insider Net Buying — Last 90 days: more insider buy transactions than sell transactions

Politicians

· Bought by Members — Last 6 months: bought by a U.S. House member

Chart Signals

· Monthly Uptrend — Price above its 12-month moving average

Key figures

· Insider Net Buying — Buy txns: 3 · Sell txns: 0 · Buy value: $250.1K · Latest buy: Aug 12, 2026

· Bought by Members — Members buying: 2 · Buy txns: 4 · Sell txns: 1 · Latest buy: Aug 7, 2026

Financial screens are computed from SEC company financial statements; red-flag models are screens, not verdicts — see Methodology.

Signal record

· Super-investor 13F BEST — appeared in 20 of the last 20 quarterly lists; latest 2026 Q2, ranked #7 of 50.

· Politician BEST — appeared in 8 of the last 20 quarterly lists; latest 2025 Q4, ranked #10 of 50.

13F signal (2021 Q3 – 2026 Q1)EventsWin rateAvg returnSPYExcess
Heavy accumulation — 3+ tracked funds increased together1973.7%+3.1%+3.1%-0.0%
Share count tripled (3x)250.0%+1.8%+3.0%-1.2%

Measured from SEC 13F filings: entry at the close on the first trading day after each quarter’s filing deadline, exit one quarter later on the same rule, dividend-adjusted closes. Past records do not guarantee future results — see Track Record and Methodology.

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