W. R. Berkley Corporation
US ˙ NYSE ˙ US0844231029

SecurityWRB / W. R. Berkley Corporation
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership3,714 shares
Latest Disclosed Value $ 260,483
Parallel Advisors, LLC ownership in WRB / W. R. Berkley Corporation

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 3,714 shares of W. R. Berkley Corporation (US:WRB) valued at $260,426 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 4,002 shares of W. R. Berkley Corporation. This represents a change in shares of -7.20% during the quarter. The current value of the position is $242,487 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (WRB) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

WRB / W. R. Berkley Corporation Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-02-11 2025-12-31 13F BERKLEY W R CORP COM Stock 084423102 3,714 -288 -7.20 260 -15.03 0.0048
2025-11-13 2025-09-30 13F BERKLEY W R CORP COM Stock 084423102 4,002 386 10.67 307 15.47 0.0056
2025-07-08 2025-06-30 13F BERKLEY W R CORP COM Stock 084423102 3,616 161 4.66 266 8.16 0.0053
2025-04-08 2025-03-31 13F BERKLEY W R CORP COM Stock 084423102 3,455 149 4.51 246 26.94 0.0055
2025-02-10 2024-12-31 13F BERKLEY W R CORP COM Stock 084423102 3,306 278 9.18 194 12.87 0.0044
2024-11-13 2024-09-30 13F BERKLEY W R CORP COM Stock 084423102 3,028 1,345 79.92 172 29.55 0.0040
2024-08-08 2024-06-30 13F BERKLEY W R CORP COM Stock 084423102 1,683 135 8.72 132 -2.94 0.0034
2024-05-06 2024-03-31 13F BERKLEY W R CORP COM Stock 084423102 1,548 19 1.24 137 25.93 0.0037
2024-02-12 2023-12-31 13F BERKLEY W R CORP COM Stock 084423102 1,529 122 8.67 108 21.35 0.0032
2024-05-20 2023-09-30 13F/A-1 BERKLEY W R CORP COM Stock 084423102 1,407 501 55.30 89 67.92 0.0030
2023-11-14 2023-09-30 13F BERKLEY W R CORP COM Stock 084423102 1,407 501 89 0.0030
2024-05-20 2023-06-30 13F/A-1 BERKLEY W R CORP COM Stock 084423102 906 -1,322 -59.34 54 -61.59 0.0017
2023-08-04 2023-06-30 13F BERKLEY W R CORP COM Stock 084423102 906 -1,322 54 0.0017
2024-05-20 2023-03-31 13F/A-1 BERKLEY W R CORP COM Stock 084423102 2,228 1,834 465.48 139 392.86 0.0047
2023-04-25 2023-03-31 13F BERKLEY W R CORP COM Stock 084423102 2,228 1,834 139 0.0047
2023-02-06 2022-12-31 13F BERKLEY W R CORP COM Stock 084423102 394 15 3.96 29 12.00 0.0012
2022-11-10 2022-09-30 13F BERKLEY W R CORP COM Stock 084423102 379 51 15.55 25 13.64 0.0012
2022-08-01 2022-06-30 13F BERKLEY W R CORP COM Stock 084423102 328 -30 -8.38 22 -8.33 0.0010
2022-04-28 2022-03-31 13F BERKLEY W R CORP COM Stock 084423102 358 89 33.09 24 9.09 0.0010
2022-01-20 2021-12-31 13F BERKLEY W R CORP COM Stock 084423102 269 45 20.09 22 37.50 0.0008
2021-11-02 2021-09-30 13F/A-1 BERKLEY W R CORP COM Stock 084423102 224 -19 -7.82 16 -11.11 0.0006
2021-08-06 2021-06-30 13F BERKLEY W R CORP COM Stock 084423102 243 53 27.89 18 28.57 0.0008
2021-04-23 2021-03-31 13F BERKLEY W R CORP COM Stock 084423102 190 -2 -1.04 14 7.69 0.0007
2021-02-02 2020-12-31 13F BERKLEY W R CORP COM Stock 084423102 192 -234 -54.93 13 -50.00 0.0007
2020-10-27 2020-09-30 13F BERKLEY W R CORP COM Stock 084423102 426 53 14.21 26 23.81 0.0016
2020-07-16 2020-06-30 13F BERKLEY W R CORP COM Stock 084423102 373 -55 -12.85 21 -4.55 0.0014
2020-04-27 2020-03-31 13F BERKLEY W R CORP COM Stock 084423102 428 177 70.52 22 29.41 0.0018
2020-01-30 2019-12-31 13F BERKLEY W R CORP COM Stock 084423102 251 0 0.00 17 -5.56 0.0013
2019-11-01 2019-09-30 13F BERKLEY W R CORP COM Stock 084423102 251 39 18.40 18 28.57 0.0015
2019-08-05 2019-06-30 13F BERKLEY W R CORP COM Stock 084423102 212 22 11.58 14 -12.50 0.0014
2019-05-01 2019-03-31 13F BERKLEY W R CORP COM Stock 084423102 190 -216 -53.20 16 -46.67 0.0018
2019-02-05 2018-12-31 13F W R BERKLEY CORPORATION COM Stock 084423102 406 10 2.53 30 -6.25 0.0042
2018-11-01 2018-09-30 13F W R BERKLEY CORPORATION COM Stock 084423102 396 -41 -9.38 32 3.23 0.0040
2018-07-30 2018-06-30 13F W R BERKLEY CORPORATION COM Stock 084423102 437 295 207.75 31 210.00 0.0044
2018-05-08 2018-03-31 13F W R BERKLEY CORPORATION COM Stock 084423102 142 0 0.00 10 0.00 0.0016
2018-02-13 2017-12-31 13F BERKLEY W R CORP COM Stock 084423102 142 0 0.00 10 0.00 0.0016
2017-11-15 2017-09-30 13F/A-1 BERKLEY W R CORP COM Stock 084423102 142 -46 -24.47 10 -23.08 0.0017
2017-08-07 2017-06-30 13F BERKLEY W R CORP COM Stock 084423102 188 29 18.24 13 18.18 0.0025
2017-05-12 2017-03-31 13F/A-1 BERKLEY W R CORP COM Stock 084423102 159 -53 -25.00 11 -21.43 0.0022
2017-05-12 2017-03-31 13F BERKLEY W R CORP COM Stock 084423102 159 11
2017-02-14 2016-12-31 13F BERKLEY W R CORP COM Stock 084423102 212 212 14 0.0033
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F BERKLEY W R CORP COM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F BERKLEY W R CORP COM Stock Call 243 18 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.