Knuff & Co LLC BRK/B — BERKSHIRE HATHAWAY INC DEL CL B NEW

Ownership history in Knuff & Co LLC  ·  30 quarters on record

AI Ownership Summary

Knuff & Co LLC reported BERKSHIRE HATHAWAY INC DEL CL B NEW (BRK/B) in 30 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 2.93% in 2025 Q1. The latest visible filing shows BRK/B at 2.07% 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. Older history is available after unlock; the visible window still shows the most recent pattern.

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 Knuff & Co LLC's position in BERKSHIRE HATHAWAY INC DEL CL B NEW, 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 2.07% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
2.93% 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
2023 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 Knuff & Co LLC fund profile Knuff & Co LLC full holdings
How Knuff & Co LLC held BRK/B — position size vs. price
% of Fund (quarterly)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 14,367 -2,546 -15.1% 2.07% $6.9M 2026-05-11 $469.32
2025 Q4 ADDED — — — 16,913 +140 +0.8% 2.51% $8.5M 2026-02-04 $503.83
2025 Q3 ADDED — — — 16,773 +436 +2.7% 2.44% $8.4M 2025-11-13 $513.11
2025 Q2 REDUCED — — — 16,337 -60 -0.4% 2.50% $7.9M 2025-08-13 $477.31
2025 Q1 ADDED — — — 16,397 +1,015 +6.6% 2.93% $8.7M 2025-05-13 $511.88
2024 Q4 ADDED — — — 15,382 +141 +0.9% 2.12% $7.0M 2025-02-10 $470.17
2024 Q3 ADDED — — — 15,241 +400 +2.7% 2.14% $7.0M 2024-11-07 $460.13
2024 Q2 ADDED — — — 14,841 +33 +0.2% 1.96% $6.0M 2024-08-01 $431.81
2024 Q1 REDUCED — — — 14,808 -217 -1.4% 2.09% $6.2M 2024-05-09 $408.82
2023 Q4 ADDED — — — 15,025 +332 +2.3% 1.95% $5.4M 2024-02-06 $393.74
20 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding BRK/B

As of 2026 Q1 — sorted by position size

TETRAD CORP 92.15% 1922 Investment Co LLC 3Y 7Y 84.86% Pangea Capital Gestao de Recursos Ltda. 72.26% CHECK CAPITAL MANAGEMENT INC/CA 3Y 7Y 52.8% Cook & Bynum Capital Management, LLC 3Y 7Y 42.7% Templeton & Phillips Capital Management, LLC 3Y 36.02% Aquamarine Zurich AG 3Y 34.57% Ardent Capital Management, Inc. 3Y 32.73% Asset Management Advisors, LLC 3Y 7Y 32.43% United American Securities Inc. (d/b/a UAS Asset Management) 3Y 7Y 31.97%

FAQ About Knuff & Co LLC 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 Knuff & Co LLC reported owning BRK/B?

Knuff & Co LLC reported BRK/B across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported BRK/B position in Knuff & Co LLC's portfolio?

The largest reported portfolio weight for BRK/B was 2.93% 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 Knuff & Co LLC reported 14,367 shares, equal to 2.07% of portfolio, with an estimated market value of $6.9M.

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

The chart compares Knuff & Co LLC'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 Knuff & Co LLC time their BRK/B position?

Based on 13F filing dates vs. subsequent BRK/B price moves, Knuff & Co LLC correctly timed 12 out of 29 reported position changes (41%). The annualised alpha on BRK/B relative to SPY over the holding period was -3.5%.

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