13F
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BERKLEY W R CORP

13F equity value
$1.9B
Positions
345
Top 10 concentration
42.6%
Quarters / total new picks
23 / 94
13F equity value over time
$0M$1B$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 23 quarters, returned +6.1% per quarter — versus +2.6% per quarter from simply owning every 13F stock. It beat that baseline in only 56.5% of quarters (excess t = 0.57, not statistically significant). Its filings tell you what it bought — not what you should buy.

Avg 2Q excess
+1.8%
t-stat
0.57
Quarterly win rate
56%
Annualized excess
+13.0%
$1 → follow vs universe
$3.13 vs $1.64
Cumulative return: $1 invested in new picks vs universe
1.00 20180630: universe 0.92120180930: universe 0.96320181231: universe 0.95320190331: universe 0.93720190630: universe 1.00720191231: universe 0.81220200331: universe 0.97920200630: universe 1.08220201231: universe 1.13120210331: universe 1.14120210630: universe 1.23220210930: universe 1.10620220630: universe 1.02520230930: universe 1.16320231231: universe 1.21520240331: universe 1.24320240630: universe 1.35620240930: universe 1.34420241231: universe 1.25420250331: universe 1.36720250630: universe 1.41020250930: universe 1.58620251231: universe 1.641 20180630: follow 1.09820180930: follow 1.23620181231: follow 1.31720190331: follow 1.26520190630: follow 1.84320191231: follow 1.21220200331: follow 1.39620200630: follow 1.46720201231: follow 1.83220210331: follow 2.08620210630: follow 2.06020210930: follow 2.16120220630: follow 2.24820230930: follow 2.50320231231: follow 2.72820240331: follow 2.56820240630: follow 2.89220240930: follow 3.07520241231: follow 2.86720250331: follow 3.09620250630: follow 3.35020250930: follow 3.00720251231: follow 3.130 0.75 2.18 3.62 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 345 · 2026 Q1

Ticker Value Weight QoQ
EPD $258M
13.9%
HOLD
ET $159M
8.6%
HOLD
KMI $95M
5.1%
HOLD
PAA $60M
3.2%
HOLD
WES $52M
2.8%
ADD
ON $45M
2.4%
HOLD
PGR $41M
2.2%
ADD
ANSC $30M
1.6%
ADD
GBLI $25M
1.4%
HOLD
CEPV $23M
1.2%
ADD
MLAA $20M
1.1%
ADD
CCIX $19M
1.0%
ADD
DRDB $19M
1.0%
ADD
TACO $19M
1.0%
ADD
KCHV $17M
0.9%
HOLD
MCGA $17M
0.9%
ADD
SBXD $16M
0.9%
ADD
LPAA $16M
0.9%
ADD
JOE $13M
0.7%
HOLD
GIW $13M
0.7%
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

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.