v3.26.1
Shareholder Report
6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name BERKSHIRE FUNDS
Entity Central Index Key 0001030979
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Berkshire Focus Fund  
Shareholder Report [Line Items]  
Fund Name BERKSHIRE FOCUS FUND
Class Name Berkshire Focus Fund
Trading Symbol BFOCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Berkshire Focus Fund (BFOCX) for the period January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the fund at www.berkshirefunds.com. You can also request this information by contacting us at 1-877-526-0707.
Additional Information Phone Number 1-877-526-0707
Additional Information Website www.berkshirefunds.com
Expenses [Text Block]

Fund Costs

(based on hypothetical $10,000 investment)

 

 

Fund Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
Berkshire Focus Fund $127.38 1.94%
Expenses Paid, Amount $ 127.38
Expense Ratio, Percent 1.94%
Factors Affecting Performance [Text Block]

Management’s Discussion of Performance

 

 

 

For the six-month period ended June 30, 2026, the Berkshire Focus Fund significantly outperformed its primary benchmark index. The Fund generated a total return of 64.82% while the S&P 500® Index—which we consider to be the Fund’s primary benchmark index—produced a total return of 10.21% over the same period. A $10,000 investment in our Fund over 10 years starting on June 30, 2016, grew to $83,175. This was a +23.59% average annual compounded return. A $10,000 investment in the S&P 500® over the same period grew to $42,271. This was a +15.51% average annual compounded return.

 

During the first half of 2026, the artificial intelligence (AI) build-out shifted decisively from software deployment into an aggressive, hardware-centric scramble to solve severe physical-world bottlenecks. While broader markets grappled with "higher-for-longer" interest rate anxieties and the outbreak of the Iran war, hardware infrastructure effectively decoupled from these macro and geopolitical headwinds. Capital across the industry rotated violently away from traditional software applications and legacy platforms prone to AI-driven disruption, reallocating instead into hard assets as hyperscalers accelerated capital expenditures to unprecedented levels. This massive deployment of capital ran into severe constraints on compute and an acute supply squeeze in high-bandwidth memory. By maintaining our deliberate portfolio positioning and concentrating heavily on key semiconductor leaders, we successfully positioned the portfolio at the exact choke points of the AI revolution. Looking ahead, we see immense opportunity across the AI landscape, particularly within companies structurally positioned to capture outsized gains from the accelerating capital deployment toward advanced silicon architectures and large-scale datacenter infrastructure.

 

Our investments in Advanced Micro Devices (AMD), Arm Holdings (ARM), Bloom Energy (BE), Marvell Technology (MRVL), Micron Technology (MU), Nebius (NBIS) and Western Digital (WDC) were all contributors to the Fund’s performance during the period. However, some of our investments detracted from the Fund’s performance—these included Broadcom (AVGO), NVIDIA (NVDA), Palantir (PLTR), Cloudflare (NET) and MongoDB (MDB).

Line Graph [Table Text Block]
Average Annual Return [Table Text Block]
Net Assets $ 461,300,000
Holdings Count | Holding 27
Advisory Fees Paid, Amount $ 2,525,156
Investment Company, Portfolio Turnover 1980.90%
Additional Fund Statistics [Text Block]

Fund Statistics

 

 

Net Assets: $461.3 million

Portfolio Holdings: 27

Portfolio Turnover: 1980.9%

Total Advisory Fees Paid: $2,525,156

Updated Prospectus Web Address www.berkshirefunds.com