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BERKSHIRE HATHAWAY INC

What you'd have made by mirroring BERKSHIRE HATHAWAY INC's public 13F filings, starting with $10,000 on Aug 15, 2013 and rebalancing at every disclosure through Jun 2, 2026.

52 filings replayed118 of 149 CUSIPs mapped to tickers129 closed trades29 still open
Benchmark
SPYIWMQQQEFAAGG
Nasdaq-100 — US large-cap tech-heavy

Equity curve

$10,000 mirrored · vs QQQ
$20k$40k$60k$80k$100k2015201720192021202320252026
Mirror portfolio$10k in QQQ
Mirror — final
$33.37K
QQQ — final
$105.62K
Mirror return
+233.7%
Excess return vs QQQ
-722.5%

Risk profile

Weekly mirror returns vs QQQ · rf ≈ 4%
Sharpe
0.32
Max drawdown
-35.8%
Beta vs QQQ
0.59
Information ratio
-0.63
CAGR
+9.9%
Volatility (ann.)
18.1%
Sortino
0.30
α (Jensen, ann.)
-3.6%
Tracking error
16.4%
Upside capture
54%
Downside capture
52%
Window
12.8y

Drawdown

Underwater curve — distance below running peak
-30%-20%-10%0%-35.8%2015201720192021202320252026

Largest drawdown: -35.8% from 2020-02-13 to 2020-03-19 · recovered 2020-12-24.

Style decomposition

R² 54% · 668 weekly obs

Multivariate regression of weekly mirror excess return on five style factors built from the benchmark ETFs: SPY (market), IWM−SPY (size), QQQ−SPY (growth), EFA−SPY (international), AGG−SPY (bonds). The intercept is the “true alpha” after stripping these passive tilts. ✓ marks loadings whose |t-stat| ≥ 2 (≈ 95% confidence the loading is non-zero).

Market (β)
+0.81✓
Size tilt
+0.05
Growth tilt
-0.31✓
International tilt
+0.12✓
Bond tilt
-0.10
α (style-adjusted)
-0.0%
R²
54%
α t-stat
-0.01
Observations
668

Rolling 1y alpha

Trailing 52w mirror return − QQQ return
-50%0%+50%avg -10.3%now -14.7%201520162017201820192020202120222023202420252026

Whether the headline alpha was earned recently or decades ago. Bands above the zero line are quarters where the mirror beat QQQ on a trailing-year basis; bands below are quarters where it lost ground. A flat positive line = steady outperformance; a curve that crosses often = regime-dependent strategy.

Realized P&L · closed trades

Cumulative profit from positions opened and later sold
$0$1.0k$2.0k$3.0kPG +$703WFC +$565C +$265V +$230201520162017201820192020202120222023202420252026
Realized P&L
+$3.2K
Closed trades
129
Win rate
40%
Avg return / closed
+27.7%

Biggest closed trades

IssuerEntryExitHeldReturnP&L
PROCTER & GAMBLE CO
PG
Q3 2013Q4 202342Q+154%+$6.26B
WELLS FARGO & CO NEW
WFC
Q3 2013Q2 202236Q+26%+$5.03B
CITIGROUP INC
C
Q2 2022Q2 202512Q+80%+$2.36B
VISA INC
V
Q3 2013Q2 202652Q+720%+$2.05B
WAL MART STORES INC
WMT
Q3 2013Q4 201821Q+55%+$2.03B
JPMORGAN CHASE & CO
JPM
Q4 2018Q1 20219Q+45%+$1.81B
MASTERCARD INC
MA
Q3 2013Q2 202652Q+763%+$1.77B
AMAZON COM INC
AMZN
Q2 2019Q2 202628Q+182%+$1.57B
COSTCO WHSL CORP NEW
COST
Q3 2013Q4 202029Q+294%+$1.41B
ABBVIE INC
ABBV
Q4 2020Q2 20226Q+69%+$1.28B

Every trade · entry date × return

Bubble = position size at entry
-50%-25%0%+25%+50%+100%+200%+500%AAPL · +1373%MA · +763%V · +720%2015201720192021202320252026
PositiveNegativeStill open (marked to market)
Best closed pick
MA +763%
Worst closed pick
AAL -68%
Total trades
158
Open trades
29