拱門資本集團有限公司
US ˙ NasdaqGS ˙ BMG0450A1053

SecurityACGL / Arch Capital Group Ltd.
InstitutionWestpac Banking Corp
Latest Disclosed Ownership722 shares
Latest Disclosed Value $ 69,305
Westpac Banking Corp ownership in ACGL / Arch Capital Group Ltd.

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 722 shares of Arch Capital Group Ltd. (US:ACGL) valued at $69,305 USD as of March 31, 2026. The entity filed a previous 13F-HR on August 10, 2023 disclosing 0 shares of Arch Capital Group Ltd.. The current value of the position is $63,781 USD.

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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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)
2026-05-11 2026-03-31 13F ARCH CAP GROUP ORD G0450A105 722 722 69 0.0024
2023-08-10 2023-06-30 13F ARCH CAP GROUP ORD G0450A105 0 -90,445 -100.00 0 -100.00
2023-05-04 2023-03-31 13F ARCH CAP GROUP ORD G0450A105 90,445 -10,227 -10.16 6,139 -2.88 0.0825
2023-02-06 2022-12-31 13F ARCH CAP GROUP ORD G0450A105 100,672 -16,147 -13.82 6,320 18.82 0.0934
2022-11-08 2022-09-30 13F ARCH CAP GROUP ORD G0450A105 116,819 -4,704 -3.87 5,320 -3.78 0.0811
2022-08-10 2022-06-30 13F ARCH CAP GROUP ORD G0450A105 121,523 58,810 93.78 5,528 82.08 0.0720
2022-05-11 2022-03-31 13F ARCH CAP GROUP ORD G0450A105 62,713 -612 -0.97 3,037 7.89 0.0348
2022-02-08 2021-12-31 13F ARCH CAP GROUP ORD G0450A105 63,325 22,300 54.36 2,815 79.69 0.0292
2021-10-27 2021-09-30 13F ARCH CAP GROUP ORD G0450A105 41,025 -6,597 -13.85 1,566 -15.53 0.0167
2021-08-11 2021-06-30 13F ARCH CAP GROUP ORD G0450A105 47,622 17,249 56.79 1,854 59.14 0.0186
2021-05-13 2021-03-31 13F ARCH CAP GROUP ORD G0450A105 30,373 0 0.00 1,165 6.39 0.0129
2021-02-11 2020-12-31 13F ARCH CAP GROUP ORD G0450A105 30,373 0 0.00 1,096 23.31 0.0124
2020-11-10 2020-09-30 13F ARCH CAP GROUP ORD G0450A105 30,373 0 0.00 888 2.07 0.0120
2020-08-12 2020-06-30 13F ARCH CAP GROUP ORD G0450A105 30,373 0 0.00 870 0.69 0.0130
2020-05-14 2020-03-31 13F ARCH CAP GROUP ORD G0450A105 30,373 0 0.00 864 -33.64 0.0149
2020-02-11 2019-12-31 13F ARCH CAP GROUP ORD G0450A105 30,373 0 0.00 1,303 2.12 0.0168
2019-11-13 2019-09-30 13F ARCH CAP GROUP ORD G0450A105 30,373 30,373 1,275 0.0177
2019-05-13 2019-03-31 13F ARCH CAP GROUP ORD G0450A105 0 -30,373 -100.00 0 -100.00
2019-02-07 2018-12-31 13F ARCH CAP GROUP ORD G0450A105 30,373 30,373 812 0.0138
2018-01-18 2017-12-31 13F CDK GLOBAL COM G0450A105 0 -7,724 -100.00 0 -100.00
2017-10-30 2017-09-30 13F CDK GLOBAL COM G0450A105 7,724 0 0.00 761 5.56 0.0168
2017-08-09 2017-06-30 13F ARCH CAP GROUP ORD G0450A105 7,724 0 0.00 721 -1.64 0.0159
2017-05-18 2017-03-31 13F/A-1 ARCH CAP GROUP ORD G0450A105 7,724 7,724 732 0.0059
2016-11-10 2016-09-30 13F ARCH CAP GROUP ORD G0450A105 0 -7,724 -100.00 0 -100.00
2016-08-10 2016-06-30 13F ARCH CAP GROUP ORD G0450A105 7,724 1,599 26.11 556 27.82 0.0061
2016-05-13 2016-03-31 13F ARCH CAP GROUP ORD G0450A105 6,125 6,125 0.00 435 0.0047
2015-08-12 2015-06-30 13F ARCH CAP GROUP ORD G0450A105 0 -7,462 -100.00 0 -100.00
2015-05-12 2015-03-31 13F ARCH CAP GROUP ORD G0450A105 7,462 -1,300 -14.84 519 0.19 0.0045
2015-02-11 2014-12-31 13F ARCH CAP GROUP ORD G0450A105 8,762 0 0.00 518 7.93 0.0049
2014-11-12 2014-09-30 13F ARCH CAP GROUP ORD G0450A105 8,762 0 0.00 479 -4.77 0.0047
2014-08-11 2014-06-30 13F ARCH CAP GROUP ORD G0450A105 8,762 2,462 39.08 503 38.95 0.0048
2014-05-12 2014-03-31 13F ARCH CAP GROUP ORD G0450A105 6,300 338 5.67 363 1.97 0.0039
2014-02-13 2013-12-31 13F ARCH CAP GROUP ORD G0450A105 5,962 -8,938 -59.99 356 -55.96 0.0041
2013-11-12 2013-09-30 13F ARCH CAP GROUP ORD G0450A105 14,900 -3,644 -19.65 807 -16.91 0.0101
2013-08-14 2013-06-30 13F ARCH CAP GROUP ORD G0450A105 18,544 18,544 971 0.0148
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.