Institutional Manager · CIK 0000011544
BERKLEY W R CORP
Greenwich, CT · File #028-06504
Latest AUM
$2.13B
Positions
285
Top-10 Concentration
56.5%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | AMAZON COM INC | AMZN | -308,300 | -$71.2M | +$4.3M |
| ADD | ALPHABET INC | GOOG | +219,300 | +$68.6M | +$6,945 |
| ADD | NVIDIA CORPORATION | NVDA | +343,600 | +$64.1M | -$7,960 |
| ADD | MICROSOFT CORP | MSFT | +102,800 | +$49.7M | -$1.7M |
| EXITED | VISTEON CORP | 92839U206 | -400,200 | -$48.0M | $0 |
| EXITED | BANK OZK LITTLE ROCK ARK | 06417N103 | -703,000 | -$35.8M | $0 |
| ADD | ENTERPRISE PRODUCTS PARTNERS | 293792107 | +825,000 | +$26.4M | +$4.7M |
| EXITED | NUTRIEN LTD | 67077M108 | -437,080 | -$25.7M | $0 |
| NEW | PROGRESSIVE CORP | 743315103 | +107,589 | +$24.5M | $0 |
| NEW | NETFLIX INC | NFLX | +249,000 | +$23.3M | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025285 pos · $2.13B
- 13F HOLDINGS REPORTQ/E Sep 2025235 pos · $1.74B
- 13F HOLDINGS REPORTQ/E Jun 2025227 pos · $1.91B
- 13F HOLDINGS REPORTQ/E Mar 2025158 pos · $1.71B
- 13F HOLDINGS REPORTQ/E Dec 2024154 pos · $2.52B
- 13F HOLDINGS REPORTQ/E Sep 2024153 pos · $1.76B
- 13F HOLDINGS REPORTQ/E Jun 2024153 pos · $2.38B
- 13F HOLDINGS REPORTQ/E Mar 2024155 pos · $1.80B
- 13F HOLDINGS REPORTQ/E Dec 2023213 pos · $1.54B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | ENTERPRISE PRODUCTS PARTNERS | 293792107 | 6,825,000 | $218.8M | 13.11% |
| 2 | ENERGY TRANSFER L P | ET-PI | 8,250,000 | $136.0M | 8.15% |
| 3 | NVIDIA CORPORATION | NVDA | 443,100 | $82.6M | 4.95% |
| 4 | NVIDIA CORPORATION | NVDA | 443,100 | $82.6M | 4.95% |
| 5 | KINDER MORGAN INC DEL | EP-PC | 2,837,206 | $78.0M | 4.67% |
| 6 | MICROSOFT CORP | MSFT | 152,600 | $73.8M | 4.42% |
| 7 | MICROSOFT CORP | MSFT | 152,600 | $73.8M | 4.42% |
| 8 | ALPHABET INC | GOOG | 219,400 | $68.7M | 4.11% |
| 9 | ALPHABET INC | GOOG | 219,400 | $68.7M | 4.11% |
| 10 | TESLA INC | TSLA | 133,300 | $59.9M | 3.59% |
| 11 | TESLA INC | TSLA | 133,300 | $59.9M | 3.59% |
| 12 | PLAINS ALL AMERICAN PIPELINE | 726503105 | 2,684,307 | $48.2M | 2.89% |
| 13 | ON SEMICONDUCTOR CORP | ON | 731,118 | $39.6M | 2.37% |
| 14 | WESTERN MIDSTREAM PARTNERS | WES | 887,163 | $35.0M | 2.10% |
| 15 | AA MISSION ACQUISITION CORP | YCY-WT | 3,230,319 | $34.5M | 2.07% |
| 16 | AGRICULTURE & NAT SOL ACQ CO | G0131Y100 | 2,525,578 | $28.3M | 1.69% |
| 17 | EQV VENTURES ACQUISITION COR | G3106N109 | 2,574,165 | $27.0M | 1.62% |
| 18 | GLOBAL INDEMNITY GROUP LLC | GBLI | 919,661 | $26.1M | 1.57% |
| 19 | PROGRESSIVE CORP | 743315103 | 107,589 | $24.5M | 1.47% |
| 20 | NETFLIX INC | NFLX | 249,000 | $23.3M | 1.40% |