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Berkley W R CORP — 13F Portfolio Report & Top Holdings (Q2 2026)
Berkley W R CORPCIK: 0000011544
Diversified strategySector-focusedMomentum follower
Total reported value
$2.1B
Reporting period: 2026-06-30 · Number of holdings: 342
BERKLEY W R CORP disclosed 342 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $2.1B and a quarterly turnover rate of 50.3%.
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Personality snowflake
- Concentration
- 12.58
- Portfolio Stability
- 50.28
- Momentum
- 100
- Sector conviction
- 100
- Diversification
- 100
- Sizing Uniformity
- 68.97
Berkley W R CORP's disclosed holdings carry a Herfindahl concentration index of 0.031 — mathematically equivalent to about 32 equally-sized positions, well below its 342 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 3.10), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 47% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govNew buy MSFT
Sold out WES
New buy NVDA
New buy TSM
New buy TSLA
Trim EPD
0.0% -$7.4M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
Showing top 200 holdings (of 342 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | EPD | Enterprise Products Partners | Stock-Energy | 11.96% | -1.91% | — | |
| 2 | ET | Energy Transfer LP | Stock-Energy | 7.52% | -1.03% | — | |
| 3 | MSFT | Microsoft CORP | Stock-Tech | 5.31% | +5.31% | NEW | |
| 4 | KMI | Kinder Morgan, Inc. | Stock-Energy | 4.32% | -0.79% | — | |
| 5 | PAA | Plains All Amer Pipeline LP | Stock-Energy | 3.38% | +0.16% | +18.63% | |
| 6 | ON | On Semiconductor | Stock-Tech | 3.30% | +0.87% | — | |
| 7 | NVDA | Nvidia CORP | Stock-Tech | 2.38% | +2.38% | NEW | |
| 8 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 2.26% | +2.26% | NEW | |
| 9 | PGR | Progressive CORP | Stock-Financials | 2.16% | -0.05% | — | |
| 10 | TSLA | Tesla Inc | Stock-Consumer Disc | 2.01% | +2.01% | NEW | |
| 11 | ANSCW | Agriculture & Natural Solutions Acquisition Corporation | Stock-Other | 1.77% | +0.18% | +24.32% | |
| 12 | ✓ | Roman Dbdr Acquisition CORP | Stock-Other | 1.14% | +0.13% | +26.42% | |
| 13 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 1.14% | +1.14% | NEW | |
| 14 | PFE | Pfizer Inc | Stock-Healthcare | 1.11% | +1.11% | NEW | |
| 15 | ✓ | Stock-Other | 1.09% | +0.12% | +24.98% | ||
| 16 | ✓ | Silverbox CORP Iv | Stock-Other | 0.99% | +0.12% | +27.44% | |
| 17 | ✓ | Eqv Ventures Ac CORP. Ii | Stock-Other | 0.91% | -0.09% | +1.59% | |
| 18 | LPAAU | Launch One Acquisition Corp. | Stock-Other | 0.87% | +0.01% | +12.64% | |
| 19 | ✓ | Kochav Defense Acqui Co S | Stock-Other | 0.84% | -0.09% | — | |
| 20 | ✓ | Yorkville Acquisition CORP. S | Stock-Other | 0.80% | -0.09% | — | |
| 21 | ✓ | Globa Terra Acquisition Cor | Stock-Other | 0.77% | +0.19% | +46.96% | |
| 22 | ✓ | M3brigade Acquisition V CORP | Stock-Other | 0.74% | +0.18% | +48.36% | |
| 23 | ✓ | Cantor Equity Partners I Inc | Stock-Other | 0.73% | +0.04% | +18.18% | |
| 24 | JOE | St Joe Co/the | Stock-Other | 0.63% | -0.08% | — | |
| 25 | ✓ | Stock-Other | 0.62% | -0.07% | — | ||
| 26 | ✓ | Berto Acquisition CORP | Stock-Other | 0.61% | -0.39% | -32.73% | |
| 27 | ✓ | Stock-Other | 0.61% | -0.07% | — | ||
| 28 | ✓ | Crown Resv Acquisition CORP I | Stock-Other | 0.59% | +0.35% | +169.51% | |
| 29 | ✓ | Fact Ii Acquisition CORP | Stock-Other | 0.58% | +0.40% | +254.33% | |
| 30 | ✓ | New Providence Acquisition C | Stock-Other | 0.58% | +0.22% | +82.75% | |
| 31 | ✓ | Stock-Other | 0.57% | -0.03% | +4.59% | ||
| 32 | ✓ | Stock-Other | 0.55% | +0.14% | +51.16% | ||
| 33 | ✓ | Quartzsea Acquisition CORP | Stock-Other | 0.55% | +0.32% | +169.80% | |
| 34 | ✓ | Stock-Other | 0.54% | -0.03% | +5.53% | ||
| 35 | ✓ | Inflection Point Acqu CORP V Ord Sh | Stock-Other | 0.53% | -0.02% | +8.14% | |
| 36 | ✓ | Jackson Acquisition Co Ii | Stock-Other | 0.47% | +0.23% | +115.59% | |
| 37 | ✓ | Fg Imperii Acquisition CORP | Stock-Other | 0.47% | -0.06% | — | |
| 38 | ✓ | Charlton Aria Acquisition Co | Stock-Other | 0.45% | -0.05% | — | |
| 39 | ✓ | Xsolla Spac 1 | Stock-Other | 0.44% | -0.05% | — | |
| 40 | ✓ | Stock-Other | 0.43% | -0.04% | +3.82% | ||
| 41 | ✓ | Stock-Other | 0.43% | +0.15% | +73.32% | ||
| 42 | ✓ | Rf Acquisition CORP Ii | Stock-Other | 0.43% | -0.02% | +6.32% | |
| 43 | ✓ | Soulpower Acquisition CORP | Stock-Other | 0.43% | -0.05% | — | |
| 44 | ✓ | American Exceptionalism Acqu | Stock-Other | 0.42% | +0.18% | +77.55% | |
| 45 | ✓ | Gigcapital9 CORP | Stock-Other | 0.42% | -0.05% | — | |
| 46 | ✓ | Sizzle Acquisition CORP. Ii | Stock-Other | 0.42% | +0.20% | +112.58% | |
| 47 | ✓ | Stock-Other | 0.42% | -0.16% | -20.33% | ||
| 48 | ✓ | Stock-Other | 0.41% | +0.15% | +74.61% | ||
| 49 | ✓ | Stock-Other | 0.41% | -0.05% | +0.17% | ||
| 50 | ✓ | Stock-Other | 0.40% | -0.04% | -1.90% |
1–50 of 200
Portfolio Performance
Performance for Q3 2026
—
Performance Last 4 Quarters
+21.8%
Based on 46% of reported portfolio value with available pricing
- Stdev
- +15.3%
- Beta
- +0.94
- Alpha
- -3.9%
- Max Drawdown
- -14%
- Annualized Perf
- +16%
- Batting Avg vs S&P
- +42.4%
- Sortino
- +1.97
- Stutzer
- +0.31
- Treynor
- +0.17
- Sterling
- +0.88
- Calmar
- +1.14
- Information Ratio
- -0.59
- Tracking Error
- +8.8%
- Stdev Down
- +8.1%
- Winning Months %
- +63.6%
- Losing Months %
- +36.4%
- Best 12 Months
- +38.1%
- Worst 12 Months
- -0.5%
- Efficiency Ratio
- +0.4
- Sharpe
- +1.05
- Stdev Sectors
- +20.5%
- Skewness
- -0.01
- Kurtosis
- -0.9
- Upside Potential
- +3.79
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 342 | $2.1B | 50 | ||
| 2026 Q1 | 345 | $1.9B | 73 | ||
| 2025 Q4 | 285 | $2.1B | 65 | ||
| 2025 Q3 | 235 | $1.7B | 68 | ||
| 2025 Q2 | 227 | $1.9B | 0 | ||
| 2025 Q1 | 158 | $1.7B | 100 | ||
| 2024 Q4 | 154 | $2.5B | 0 | ||
| 2024 Q3 | 153 | $1.8B | 0 | ||
| 2024 Q2 | 153 | $2.4B | 0 | ||
| 2024 Q1 | 155 | $1.8B | 0 | ||
| 2023 Q4 | 195 | $1.4B | 0 | ||
| 2023 Q3 | 213 | $1.5B | 0 | ||
| 2023 Q2 | 220 | $1.7B | 0 | ||
| 2023 Q1 | 236 | $1.6B | 0 | ||
| 2022 Q4 | 338 | $1.9B | 0 | ||
| 2022 Q3 | 512 | $2.1B | 0 | ||
| 2022 Q2 | 553 | $2.0B | 0 | ||
| 2022 Q1 | 573 | $2.0B | 0 | ||
| 2021 Q4 | 572 | $1.8B | 0 | ||
| 2021 Q3 | 444 | $1.5B | 0 | ||
| 2021 Q2 | 380 | $1.0B | 64 | ||
| 2021 Q1 | 336 | $867.6M | 92 | ||
| 2020 Q4 | 171 | $602.8M | 100 | ||
| 2020 Q3 | 134 | $679.8M | 100 | ||
| 2020 Q2 | 102 | $747.8M | 0 | ||
| 2020 Q1 | 110 | $797.2M | 0 | ||
| 2019 Q4 | 100 | $492.7M | 0 | ||
| 2019 Q3 | 90 | $513.6M | 0 | ||
| 2019 Q2 | 95 | $482.0M | 0 | ||
| 2019 Q1 | 79 | $434.4M | 0 | ||
| 2018 Q4 | 78 | $429.6M | 0 | ||
| 2018 Q3 | 13 | $134.5M | 0 | ||
| 2018 Q2 | 71 | $611.9M | 0 | ||
| 2018 Q1 | 78 | $664.0M | 0 | ||
| 2017 Q4 | 82 | $879.8M | 0 | ||
| 2017 Q3 | 66 | $686.9M | 0 | ||
| 2017 Q2 | 58 | $814.9M | 0 | ||
| 2017 Q1 | 49 | $588.8M | 0 | ||
| 2016 Q4 | 50 | $590.4M | 0 | ||
| 2016 Q3 | 61 | $739.0M | 0 | ||
| 2016 Q2 | 56 | $583.8M | 0 | ||
| 2016 Q1 | 61 | $533.0M | 0 | ||
| 2015 Q4 | 81 | $537.4M | 0 | ||
| 2015 Q3 | 86 | $608.3M | 0 | ||
| 2015 Q2 | 86 | $875.2M | 0 | ||
| 2015 Q1 | 81 | $680.4M | 0 | ||
| 2014 Q4 | 85 | $754.2M | 62 | ||
| 2014 Q3 | 90 | $581.3M | 0 |
Holding changes this quarter
Berkley W R CORP's most significant position changes for 2026-06-30: New buy: Microsoft CORP (MSFT); Sold out: Western Midstream Partners L (WES); New buy: Nvidia CORP (NVDA); New buy: Taiwan Semiconductor-sp Adr (TSM); New buy: Tesla Inc (TSLA).
Showing top 200 changes by size (of 430 total)
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | MSFT | Microsoft CORP | +5.3% | NEW | New buy |
| 2 | NVDA | Nvidia CORP | +2.4% | NEW | New buy |
| 3 | TSM | Taiwan Semiconductor-sp Adr | +2.3% | NEW | New buy |
| 4 | TSLA | Tesla Inc | +2% | NEW | New buy |
| 5 | AMZN | Amazon.com Inc | +1.1% | NEW | New buy |
| 6 | PFE | Pfizer Inc | +1.1% | NEW | New buy |
| 7 | ON | On Semiconductor | +0.9% | — | Unchanged |
| 8 | ✓ | Fact Ii Acquisition CORP | +0.4% | +254.33% | Add |
| 9 | ✓ | Crown Resv Acquisition CORP I | +0.4% | +169.51% | Add |
| 10 | ✓ | Quartzsea Acquisition CORP | +0.3% | +169.80% | Add |
| 11 | ✓ | +0.3% | NEW | New buy | |
| 12 | ✓ | +0.3% | NEW | New buy | |
| 13 | ✓ | +0.3% | NEW | New buy | |
| 14 | ✓ | +0.3% | NEW | New buy | |
| 15 | ✓ | +0.2% | NEW | New buy | |
| 16 | ✓ | Jackson Acquisition Co Ii | +0.2% | +115.59% | Add |
| 17 | ✓ | +0.2% | NEW | New buy | |
| 18 | ✓ | New Providence Acquisition C | +0.2% | +82.75% | Add |
| 19 | ✓ | +0.2% | NEW | New buy | |
| 20 | ✓ | +0.2% | NEW | New buy | |
| 21 | ✓ | Sizzle Acquisition CORP. Ii | +0.2% | +112.58% | Add |
| 22 | ✓ | Globa Terra Acquisition Cor | +0.2% | +46.96% | Add |
| 23 | ✓ | +0.2% | NEW | New buy | |
| 24 | ✓ | +0.2% | NEW | New buy | |
| 25 | ✓ | +0.2% | NEW | New buy | |
| 26 | ✓ | +0.2% | NEW | New buy | |
| 27 | ANSCW | Agriculture & Natural Solutions Acquisition Corporation | +0.2% | +24.32% | Add |
| 28 | ✓ | M3brigade Acquisition V CORP | +0.2% | +48.36% | Add |
| 29 | ✓ | American Exceptionalism Acqu | +0.2% | +77.55% | Add |
| 30 | ✓ | +0.2% | +121.18% | Add | |
| 31 | ✓ | Tavia Acquisition CORP | +0.2% | +152.85% | Add |
| 32 | PAA | Plains All Amer Pipeline LP | +0.2% | +18.63% | Add |
| 33 | ✓ | +0.2% | +73.32% | Add | |
| 34 | ✓ | +0.2% | +74.61% | Add | |
| 35 | ✓ | +0.2% | NEW | New buy | |
| 36 | ✓ | +0.1% | +51.16% | Add | |
| 37 | ✓ | +0.1% | +282.46% | Add | |
| 38 | ✓ | +0.1% | NEW | New buy | |
| 39 | ✓ | +0.1% | NEW | New buy | |
| 40 | ✓ | +0.1% | NEW | New buy | |
| 41 | ✓ | Roman Dbdr Acquisition CORP | +0.1% | +26.42% | Add |
| 42 | ✓ | +0.1% | NEW | New buy | |
| 43 | ✓ | +0.1% | NEW | New buy | |
| 44 | ✓ | +0.1% | +24.98% | Add | |
| 45 | ✓ | Silverbox CORP Iv | +0.1% | +27.44% | Add |
| 46 | ✓ | Titan Acquisition CORP | +0.1% | +56.93% | Add |
| 47 | ✓ | +0.1% | NEW | New buy | |
| 48 | ✓ | +0.1% | NEW | New buy | |
| 49 | ✓ | +0.1% | NEW | New buy | |
| 50 | ✓ | +0.1% | NEW | New buy |
1–50 of 200
Filing History
FAQ
What is Berkley W R CORP and what type of investor is it?
Berkley W R CORP is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $2.1B, spread across 342 disclosed positions.
What are Berkley W R CORP's largest equity positions?
Based on the latest 13F filing, Berkley W R CORP's top holdings by market value are:
1. Enterprise Products Partners (EPD) — $250.9M (12.0%)
2. Energy Transfer LP (ET) — $157.7M (7.5%)
3. Microsoft CORP (MSFT) — $111.5M (5.3%)
4. Kinder Morgan, Inc. (KMI) — $90.7M (4.3%)
5. Plains All Amer Pipeline LP (PAA) — $70.9M (3.4%)
What changes did Berkley W R CORP make in its most recent portfolio filing?
In the latest reported quarter, Berkley W R CORP made 182 notable position adjustments: 69 new positions were initiated, 53 existing holdings were added to, 15 positions were partially reduced, and 45 were completely exited. The largest of these moves: New buy: Microsoft CORP (MSFT); Sold out: Western Midstream Partners L (WES); New buy: Nvidia CORP (NVDA); New buy: Taiwan Semiconductor-sp Adr (TSM); New buy: Tesla Inc (TSLA)
What sectors does Berkley W R CORP focus on?
Berkley W R CORP is concentrated in the following sectors based on its current disclosed equity portfolio:
• Energy: 57.6%
• Information Technology: 28.1%
• Consumer Discretionary: 6.7%
• Financials: 4.6%
• Health Care: 2.4%
• Communication Services: 0.7%
Investment Profile
Berkley W R CORP's portfolio is broadly diversified and moderately active, with 57.6% of the portfolio concentrated in Energy.
Its turnover score has risen from 0 to 50 over the past 4 quarters — a shift toward more active trading.
It has added to its ON position over the past two quarters (+$29.5M, now $69.1M), while trimming EMMIS ACQUISITION CORP. over the same stretch (-$32.5K, still holding $12.5K).
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Developer Access
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REST API
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