13F
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CHECK CAPITAL MANAGEMENT INC/CA

13F equity value
$1.6B
Positions
49
Top 10 concentration
89.9%
Quarters / total new picks
21 / 41
13F equity value over time
$0M$836M$2B2017201820192020202120222023202420252026

"13F equity value" = market value of this filer's US-listed long equity positions only. It excludes cash, bonds, non-US and short positions, so it understates a fund's true assets under management — often by a lot.

Not significant Verdict

13F holdings are disclosed ~45 days after quarter-end, and they never reveal when within the quarter a fund actually bought. So any 13F-based summary is structurally late and blurred — this applies to every fund, including this one.

We backtested copying it anyway. Buying this fund's new positions the day each filing went public, over 21 quarters, returned +1.9% per quarter — versus +3.9% per quarter from simply owning every 13F stock. It beat that baseline in only 52.4% of quarters (excess t = 0.52, not statistically significant). Its filings tell you what it bought — not what you should buy.

Avg 2Q excess
+2.1%
t-stat
0.52
Quarterly win rate
52%
Annualized excess
-10.0%
$1 → follow vs universe
$1.27 vs $2.05
Cumulative return: $1 invested in new picks vs universe
1.00 20180331: universe 1.04120180930: universe 1.08920181231: universe 1.07720190331: universe 1.05820191231: universe 0.85420200331: universe 1.02920200630: universe 1.13720200930: universe 1.39520201231: universe 1.45820210331: universe 1.47120220930: universe 1.58020221231: universe 1.46820230331: universe 1.54720230630: universe 1.49120230930: universe 1.69320231231: universe 1.76820240331: universe 1.80820240630: universe 1.97220240930: universe 1.95520241231: universe 1.82520250930: universe 2.052 20180331: follow 1.11020180930: follow 1.15820181231: follow 1.32220190331: follow 1.35120191231: follow 1.17820200331: follow 1.32020200630: follow 1.24520200930: follow 1.22320201231: follow 1.48720210331: follow 1.34920220930: follow 1.14120221231: follow 1.10020230331: follow 1.07120230630: follow 1.20520230930: follow 1.44720231231: follow 1.31320240331: follow 1.29320240630: follow 0.99220240930: follow 1.05020241231: follow 1.00820250930: follow 1.273 0.79 1.50 2.22 20182019202020212022202320242025 Follow Universe

Quarterly compounding, invested quarters only · entry 47 days after quarter-end (when 13F data becomes public)

Listed as facts. See the verdict above before treating this as signal.

Top 20 holdings of 49 · 2026 Q1

Ticker Value Weight QoQ
BRK/B $531M
32.8%
HOLD
BN $177M
10.9%
HOLD
MKL $147M
9.1%
HOLD
FCNCA $83M
5.1%
ADD
SIRI $68M
4.2%
ADD
LKQ $56M
3.5%
ADD
AMZN $43M
2.6%
ADD
DIS $42M
2.6%
HOLD
HSY $40M
2.5%
HOLD
BRK/A $21M
1.3%
HOLD
AAPL $6M
0.4%
TRIM
MSFT $2M
0.1%
HOLD
AMGN $1M
0.1%
HOLD
CAT $1M
0.1%
HOLD
TRUP $1M
0.1%
HOLD
GS $1M
0.1%
HOLD
TSLA $929375
0.1%
HOLD
GEV $786483
0.1%
TRIM
GLW $686648
0.0%
HOLD
RTX $673028
0.0%
HOLD

QoQ vs previous quarter's share count · NEW = new position · ADD/TRIM = ±2% shares · HOLD = unchanged.

Listed as facts. See the verdict above before treating this as signal.

New positions in 2026 Q1

None.

Method & Limitations

Method: a "new position" = held this quarter, absent last quarter (options excluded; stocks with <50 prior holders excluded to filter spin-off artifacts). Entry 47 days after quarter-end — the first day the public could act on the filing. Benchmark = equal-weighted universe of all 13F-held stocks. Limitations: quarterly snapshots can't see intra-quarter trades; survivorship bias — funds that shut down are absent, which flatters the sample. Statistics, not advice.