Arch Capital Group Ltd.
US ˙ NasdaqGS ˙ BMG0450A1053

SecurityACGL / Arch Capital Group Ltd.
InstitutionStifel Financial Corp
Latest Disclosed Ownership886,107 shares
Latest Disclosed Value $ 85,057,501
Stifel Financial Corp reports 3.69% decrease in ownership of ACGL / Arch Capital Group Ltd.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 886,107 shares of Arch Capital Group Ltd. (US:ACGL) valued at $85,057,411 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 920,103 shares of Arch Capital Group Ltd.. This represents a change in shares of -3.69% during the quarter. The current value of the position is $78,278,692 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)
2026-05-12 2026-03-31 13F ARCH CAP GROUP ORD G0450A105 886,107 -33,996 -3.69 85,058 -3.62 0.0183
2026-02-13 2025-12-31 13F ARCH CAP GROUP ORD G0450A105 920,103 -56,133 -5.75 88,256 -0.36 0.0794
2025-11-12 2025-09-30 13F ARCH CAP GROUP ORD G0450A105 976,236 -14,057 -1.42 88,574 -1.77 0.0809
2025-08-14 2025-06-30 13F ARCH CAP GROUP ORD G0450A105 990,293 4,140 0.42 90,166 -4.94 0.0877
2025-05-14 2025-03-31 13F ARCH CAP GROUP ORD G0450A105 986,153 -17,564 -1.75 94,848 2.32 0.1008
2025-02-13 2024-12-31 13F ARCH CAP GROUP ORD G0450A105 1,003,717 23,040 2.35 92,693 -15.52 0.0965
2024-11-14 2024-09-30 13F ARCH CAP GROUP ORD G0450A105 980,677 3,800 0.39 109,718 11.32 0.1151
2024-08-13 2024-06-30 13F ARCH CAP GROUP ORD G0450A105 976,877 22,739 2.38 98,557 11.74 0.1109
2024-05-14 2024-03-31 13F ARCH CAP GROUP ORD G0450A105 954,138 43,693 4.80 88,201 30.44 0.1005
2024-02-12 2023-12-31 13F ARCH CAP GROUP ORD G0450A105 910,445 20,832 2.34 67,619 -4.64 0.0851
2023-11-13 2023-09-30 13F ARCH CAP GROUP ORD G0450A105 889,613 46,195 5.48 70,911 12.33 0.0997
2023-08-14 2023-06-30 13F ARCH CAP GROUP ORD G0450A105 843,418 -49,346 -5.53 63,130 4.19 0.0864
2023-05-12 2023-03-31 13F ARCH CAP GROUP ORD G0450A105 892,764 62,897 7.58 60,592 16.30 0.0868
2023-02-13 2022-12-31 13F ARCH CAP GROUP ORD G0450A105 829,867 -1,031 -0.12 52,099 37.69 0.0782
2022-11-14 2022-09-30 13F ARCH CAP GROUP ORD G0450A105 830,898 8,916 1.08 37,839 1.20 0.0620
2022-08-15 2022-06-30 13F ARCH CAP GROUP ORD G0450A105 821,982 33,087 4.19 37,392 -2.11 0.0585
2022-05-13 2022-03-31 13F ARCH CAP GROUP ORD G0450A105 788,895 -4,787 -0.60 38,197 8.27 0.0521
2022-02-14 2021-12-31 13F ARCH CAP GROUP ORD G0450A105 793,682 -25,029 -3.06 35,279 12.86 0.0466
2021-11-15 2021-09-30 13F ARCH CAP GROUP ORD G0450A105 818,711 43,420 5.60 31,258 3.54 0.0458
2021-08-13 2021-06-30 13F ARCH CAP GROUP ORD G0450A105 775,291 5,750 0.75 30,190 2.25 0.0452
2021-05-14 2021-03-31 13F ARCH CAP GROUP ORD G0450A105 769,541 79,152 11.46 29,527 18.57 0.0487
2021-02-12 2020-12-31 13F ARCH CAP GROUP ORD G0450A105 690,389 5,215 0.76 24,903 24.25 0.0444
2020-11-16 2020-09-30 13F ARCH CAP GROUP ORD G0450A105 685,174 -4,077 -0.59 20,042 1.49 0.0412
2020-08-14 2020-06-30 13F ARCH CAP GROUP ORD G0450A105 689,251 -65,529 -8.68 19,747 -8.05 0.0454
2020-05-14 2020-03-31 13F ARCH CAP GROUP ORD G0450A105 754,780 -8,968 -1.17 21,476 -34.43 0.0593
2020-02-13 2019-12-31 13F ARCH CAP GROUP ORD G0450A105 763,748 -16,853 -2.16 32,753 -0.04 0.0682
2019-11-19 2019-09-30 13F/A-1 ARCH CAP GROUP ORD G0450A105 780,601 -56,972 -6.80 32,767 5.51 0.0836
2019-11-13 2019-09-30 13F ARCH CAP GROUP ORD G0450A105 780,601 -56,972 32,767 18,367.5459
2019-08-14 2019-06-30 13F ARCH CAP GROUP ORD G0450A105 837,573 40,560 5.09 31,057 20.55 0.0801
2019-05-14 2019-03-31 13F ARCH CAP GROUP ORD G0450A105 797,013 -31,918 -3.85 25,763 16.33 0.0728
2019-02-13 2018-12-31 13F ARCH CAP GROUP ORD G0450A105 828,931 -26,508 -3.10 22,146 -13.15 0.0716
2018-11-13 2018-09-30 13F ARCH CAP GROUP ORD G0450A105 855,439 -12,073 -1.39 25,499 11.07 0.0731
2018-08-14 2018-06-30 13F ARCH CAP GROUP ORD G0450A105 867,512 563,975 185.80 22,957 -11.63 0.0704
2018-05-11 2018-03-31 13F ARCH CAP GROUP ORD G0450A105 303,537 14,159 4.89 25,979 -1.10 0.0820
2018-02-14 2017-12-31 13F ARCH CAP GROUP ORD G0450A105 289,378 -11,324 -3.77 26,269 -11.35 0.0833
2017-11-13 2017-09-30 13F ARCH CAP GROUP ORD G0450A105 300,702 -2,829 -0.93 29,631 4.64 0.1028
2017-08-14 2017-06-30 13F ARCH CAP GROUP ORD G0450A105 303,531 -2,208 -0.72 28,317 -2.30 0.1051
2017-05-10 2017-03-31 13F ARCH CAP GROUP ORD G0450A105 305,739 -145 -0.05 28,984 9.83 0.1122
2017-02-16 2016-12-31 13F ARCH CAP GROUP ORD G0450A105 305,884 -9,065 -2.88 26,390 5.75 0.1120
2016-11-15 2016-09-30 13F ARCH CAP GROUP ORD G0450A105 314,949 -1,203 -0.38 24,956 9.64 0.1122
2016-08-17 2016-06-30 13F ARCH CAP GROUP ORD G0450A105 316,152 -7,550 -2.33 22,762 -1.10 0.1053
2016-05-16 2016-03-31 13F ARCH CAP GROUP ORD G0450A105 323,702 -12,485 -3.71 23,015 -1.89 0.1226
2016-03-21 2015-12-31 13F/A-2 ARCH CAP GROUP ORD G0450A105 336,187 -44,004 -11.57 23,458 -16.00 0.1221
2016-02-26 2015-12-31 13F/A-1 ARCH CAP GROUP ORD G0450A105 336,187 0 23,458 0.1227
2016-02-16 2015-12-31 13F ARCH CAP GROUP ORD G0450A105 336,187 24,085
2015-11-16 2015-09-30 13F ARCH CAP GROUP ORD G0450A105 380,191 1,842 0.49 27,927 10.31 0.1569
2015-08-17 2015-06-30 13F/A-1 ARCH CAP GROUP ORD G0450A105 378,349 -6,306 -1.64 25,316 6.90 0.1309
2015-08-17 2015-06-30 13F ARCH CAP GROUP ORD G0450A105 378,310 25,314
2015-05-14 2015-03-31 13F ARCH CAP GROUP ORD G0450A105 384,655 -40,012 -9.42 23,681 -5.69 0.1296
2015-02-13 2014-12-31 13F ARCH CAP GROUP ORD G0450A105 424,667 375,991 772.44 25,110 842.92 0.1395
2014-11-13 2014-09-30 13F ARCH CAP GROUP ORD G0450A105 48,676 -3,896 -7.41 2,663 -11.79 0.0234
2014-08-14 2014-06-30 13F ARCH CAP GROUP ORD G0450A105 52,572 -11,766 -18.29 3,019 -18.43 0.0271
2014-05-15 2014-03-31 13F ARCH CAP GROUP ORD G0450A105 64,338 64,338 3,701 0.0354
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.