MARINO, STRAM & ASSOCIATES LLC BRK/B — BERKSHIRE HATHAWAY INC DEL CL B NEW

Ownership history in MARINO, STRAM & ASSOCIATES LLC  ·  34 quarters on record

AI Ownership Summary

MARINO, STRAM & ASSOCIATES LLC reported BERKSHIRE HATHAWAY INC DEL CL B NEW (BRK/B) in 34 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 1.22% in 2025 Q1. The latest visible filing shows BRK/B at 1.04% 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 MARINO, STRAM & ASSOCIATES 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 1.04% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.22% 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 MARINO, STRAM & ASSOCIATES LLC fund profile MARINO, STRAM & ASSOCIATES LLC full holdings
How MARINO, STRAM & ASSOCIATES 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 ADDED — — — 12,059 +60 +0.5% 1.04% $5.8M 2026-04-29 $469.32
2025 Q4 REDUCED — — — 11,999 -178 -1.5% 1.09% $6.0M 2026-01-16 $493.29
2025 Q3 ADDED — — — 12,177 +1,196 +10.9% 1.10% $6.1M 2025-11-03 $475.68
2025 Q2 ADDED — — — 10,981 +650 +6.3% 1.08% $5.3M 2025-07-18 $473.80
2025 Q1 ADDED — — — 10,331 +192 +1.9% 1.22% $5.5M 2025-04-21 $506.92
2024 Q4 ADDED — — — 10,139 +234 +2.4% 1.02% $4.6M 2025-01-17 $467.95
2024 Q3 ADDED — — — 9,905 +25 +0.3% 1.02% $4.6M 2024-10-21 $464.16
2024 Q2 ADDED — — — 9,880 +98 +1.0% 0.98% $4.0M 2024-07-18 $441.82
2024 Q1 ADDED — — — 9,782 +73 +0.8% 0.97% $4.1M 2024-04-24 $405.95
2023 Q4 ADDED — — — 9,709 +438 +4.7% 0.90% $3.5M 2024-01-30 $387.15
24 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% 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% Pacifica Capital Investments, LLC 3Y 7Y 30.79%

FAQ About MARINO, STRAM & ASSOCIATES 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 MARINO, STRAM & ASSOCIATES LLC reported owning BRK/B?

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

What was the largest reported BRK/B position in MARINO, STRAM & ASSOCIATES LLC's portfolio?

The largest reported portfolio weight for BRK/B was 1.22% 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 MARINO, STRAM & ASSOCIATES LLC reported 12,059 shares, equal to 1.04% of portfolio, with an estimated market value of $5.8M.

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

The chart compares MARINO, STRAM & ASSOCIATES 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 MARINO, STRAM & ASSOCIATES LLC time their BRK/B position?

Based on 13F filing dates vs. subsequent BRK/B price moves, MARINO, STRAM & ASSOCIATES LLC correctly timed 21 out of 33 reported position changes (64%). The annualised alpha on BRK/B relative to SPY over the holding period was -3.3%.

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