Union Bancaire Privee, UBP SA BRK/B — BERKSHIRE HATHAWAY INC DEL

Ownership history in Union Bancaire Privee, UBP SA  ·  6 quarters on record

AI Ownership Summary

Union Bancaire Privee, UBP SA reported BERKSHIRE HATHAWAY INC DEL (BRK/B) in 6 quarterly 13F filings from 2024 Q4 through 2026 Q1. Peak portfolio weight reached 1.0% in 2025 Q1. The latest visible filing shows BRK/B at 0.41% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this BRK/B ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Union Bancaire Privee, UBP SA's position in BERKSHIRE HATHAWAY INC DEL, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

BRK/B was reported at 0.41% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.0% in 2025 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q4 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

BRK/B stock page Union Bancaire Privee, UBP SA fund profile Union Bancaire Privee, UBP SA full holdings
How Union Bancaire Privee, UBP SA held BRK/B — position size vs. price
% of Fund (quarterly)
📋 Quarterly Holdings History 6 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 66,874 -32,549 -32.7% 0.41% $29.8M 2026-04-22 $465.40
2025 Q4 ADDED — — — 99,423 +17,452 +21.3% 0.58% $48.5M 2026-01-05 $498.52
2025 Q3 REDUCED — — — 81,971 -3,170 -3.7% 0.58% $40.7M 2025-10-07 $502.30
2025 Q2 REDUCED — — — 85,141 -13,130 -13.4% 0.61% $42.1M 2025-07-18 $473.80
2025 Q1 ADDED — — — 98,271 +10,767 +12.3% 1.00% $51.9M 2025-04-16 $516.45
2024 Q4 INITIATED — — — 87,504 — — 0.27% $38.0M 2025-01-22 $460.51

🏢 Other funds also holding BRK/B

As of 2026 Q2 — sorted by position size

TETRAD CORP 92.03% Pangea Capital Gestao de Recursos Ltda. 81.45% Aquamarine Zurich AG 3Y 33.89% Asset Management Advisors, LLC 3Y 7Y 31.06% SHAYNE & JACOBS, LLC 3Y 7Y 23.76% ARMSTRONG HENRY H ASSOCIATES INC 3Y 7Y 18.18% Defender Capital, LLC. 3Y 7Y 16.46% Manitou Investment Management Ltd. 3Y 7Y 15.74% Norman Fields, Gottscho Capital Management, LLC 3Y 7Y 14.62% Arkfeld Wealth Strategies, L.L.C. 3Y 13.59%

FAQ About Union Bancaire Privee, UBP SA and BRK/B

These are the practical questions this page is built to answer before you even open the full history table.

How long has Union Bancaire Privee, UBP SA reported owning BRK/B?

Union Bancaire Privee, UBP SA reported BRK/B across 6 quarterly 13F filings, from 2024 Q4 through 2026 Q1.

What was the largest reported BRK/B position in Union Bancaire Privee, UBP SA's portfolio?

The largest reported portfolio weight for BRK/B was 1.00% in 2025 Q1.

What is the latest reported BRK/B position on this page?

The most recent filing on this page is 2026 Q1, when Union Bancaire Privee, UBP SA reported 66,874 shares, equal to 0.41% of portfolio, with an estimated market value of $29.8M.

What does the chart on this BRK/B ownership page compare?

The chart compares Union Bancaire Privee, UBP SA's quarterly BRK/B portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did Union Bancaire Privee, UBP SA time their BRK/B position?

Based on 13F filing dates vs. subsequent BRK/B price moves, Union Bancaire Privee, UBP SA correctly timed 2 out of 5 reported position changes (40%). The annualised alpha on BRK/B relative to SPY over the holding period was -12.3%.

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