Arch Capital Group Ltd.
US ˙ NasdaqGS ˙ BMG0450A1053

SecurityACGL / Arch Capital Group Ltd.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership9,502 shares
Latest Disclosed Value $ 912,097
Squarepoint Ops LLC ownership in ACGL / Arch Capital Group Ltd.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 9,502 shares of Arch Capital Group Ltd. (US:ACGL) valued at $912,097 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 71,042 shares of Arch Capital Group Ltd.. This represents a change in shares of -86.62% during the quarter. The current value of the position is $835,131 USD.

Squarepoint Ops LLC has a history of taking positions in derivatives of the underlying security (ACGL) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put 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.

ACGL / Arch Capital Group Ltd. 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)
2026-05-15 2026-03-31 13F ARCH CAP GROUP ORD G0450A105 9,502 -61,540 -86.62 912 -86.62 0.0011
2026-02-13 2025-12-31 13F ARCH CAP GROUP ORD G0450A105 71,042 -17,206 -19.50 6,814 -14.89 0.0073
2025-11-14 2025-09-30 13F ARCH CAP GROUP ORD G0450A105 88,248 -3,277 -3.58 8,007 -3.92 0.0080
2025-08-27 2025-06-30 13F/A-1 ARCH CAP GROUP ORD G0450A105 91,525 -101,208 -52.51 8,333 -55.05 0.0087
2025-08-14 2025-06-30 13F ARCH CAP GROUP ORD G0450A105 91,525 -101,208 8,333 0.0087
2025-08-27 2025-03-31 13F/A-1 ARCH CAP GROUP ORD G0450A105 192,733 113,758 144.04 18,537 154.18 0.0225
2025-05-15 2025-03-31 13F ARCH CAP GROUP ORD G0450A105 192,733 113,758 18,537 0.0225
2025-02-14 2024-12-31 13F ARCH CAP GROUP ORD G0450A105 78,975 -185,699 -70.16 7,293 -75.37 0.0072
2024-11-14 2024-09-30 13F ARCH CAP GROUP ORD G0450A105 264,674 254,540 2,511.74 29,612 2,797.36 0.0463
2024-08-14 2024-06-30 13F ARCH CAP GROUP ORD G0450A105 10,134 72 0.72 1,022 9.89 0.0017
2024-05-15 2024-03-31 13F ARCH CAP GROUP ORD G0450A105 10,062 -160,901 -94.11 930 -92.68 0.0016
2024-02-14 2023-12-31 13F ARCH CAP GROUP ORD G0450A105 170,963 160,839 1,588.69 12,697 1,475.31 0.0240
2023-11-14 2023-09-30 13F ARCH CAP GROUP ORD G0450A105 10,124 -4,148 -29.06 807 -24.53 0.0020
2023-08-14 2023-06-30 13F ARCH CAP GROUP ORD G0450A105 14,272 14,272 1,068 0.0033
2023-02-14 2022-12-31 13F ARCH CAP GROUP ORD G0450A105 0 -7,179 -100.00 0 -100.00
2022-11-14 2022-09-30 13F ARCH CAP GROUP ORD G0450A105 7,179 -74,096 -91.17 327 -91.15 0.0017
2022-08-15 2022-06-30 13F ARCH CAP GROUP ORD G0450A105 81,275 81,275 3,697 0.0206
2022-05-16 2022-03-31 13F ARCH CAP GROUP ORD G0450A105 0 -24,635 -100.00 0 -100.00
2022-02-14 2021-12-31 13F ARCH CAP GROUP ORD G0450A105 24,635 -36,290 -59.57 1,095 -52.92 0.0029
2021-11-15 2021-09-30 13F ARCH CAP GROUP ORD G0450A105 60,925 60,925 2,326 0.0067
2021-08-16 2021-06-30 13F ARCH CAP GROUP ORD G0450A105 0 -99,700 -100.00 0 -100.00
2021-05-17 2021-03-31 13F ARCH CAP GROUP ORD G0450A105 99,700 45,053 82.44 3,825 94.06 0.0224
2021-02-16 2020-12-31 13F ARCH CAP GROUP ORD G0450A105 54,647 -92,568 -62.88 1,971 -54.23 0.0147
2020-11-16 2020-09-30 13F ARCH CAP GROUP ORD G0450A105 147,215 70,574 92.08 4,306 96.08 0.0580
2020-08-14 2020-06-30 13F ARCH CAP GROUP ORD G0450A105 76,641 29,103 61.22 2,196 62.31 0.0355
2020-05-15 2020-03-31 13F ARCH CAP GROUP ORD G0450A105 47,538 24,370 105.19 1,353 36.12 0.0346
2020-02-14 2019-12-31 13F ARCH CAP GROUP ORD G0450A105 23,168 -19,901 -46.21 994 -45.02 0.0059
2019-11-14 2019-09-30 13F ARCH CAP GROUP ORD G0450A105 43,069 43,069 1,808 0.0161
2019-05-15 2019-03-31 13F ARCH CAP GROUP ORD G0450A105 0 -39,100 -100.00 0 -100.00
2019-02-14 2018-12-31 13F ARCH CAP GROUP ORD G0450A105 39,100 39,100 1,045 0.0122
2018-11-14 2018-09-30 13F ARCH CAP GROUP ORD G0450A105 0 -85,513 -100.00 0 -100.00
2018-08-14 2018-06-30 13F ARCH CAP GROUP ORD G0450A105 85,513 28,657 50.40 2,263 -53.49 0.0300
2018-05-15 2018-03-31 13F ARCH CAP GROUP ORD G0450A105 56,856 56,856 4,866 0.0773
2017-11-14 2017-09-30 13F ARCH CAP GROUP ORD G0450A105 0 -47,732 -100.00 0 -100.00
2017-08-14 2017-06-30 13F ARCH CAP GROUP ORD G0450A105 47,732 47,732 4,453 0.0876
2017-05-15 2017-03-31 13F ARCH CAP GROUP ORD G0450A105 0 -9,500 -100.00 0 -100.00
2017-02-14 2016-12-31 13F ARCH CAP GROUP ORD G0450A105 9,500 -2,500 -20.83 820 -13.77 0.0335
2016-11-14 2016-09-30 13F ARCH CAP GROUP ORD G0450A105 12,000 1,600 15.38 951 26.97 0.0631
2016-08-15 2016-06-30 13F ARCH CAP GROUP ORD G0450A105 10,400 5,500 112.24 749 115.23 0.0467
2016-05-16 2016-03-31 13F ARCH CAP GROUP ORD G0450A105 4,900 4,900 348 0.0270
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
(%)
2025-08-27 2025-06-30 13F/A ARCH CAP GROUP ORD Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F ARCH CAP GROUP ORD Call 0 0 n/a n/a n/a
2025-08-27 2025-03-31 13F/A ARCH CAP GROUP ORD Call 3,200 308 n/a n/a n/a
2025-05-15 2025-03-31 13F ARCH CAP GROUP ORD Call 3,200 308 n/a n/a n/a
Disclosed Put 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
(%)
2025-08-27 2025-06-30 13F/A ARCH CAP GROUP ORD Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F ARCH CAP GROUP ORD Put 0 0 n/a n/a n/a
2025-08-27 2025-03-31 13F/A ARCH CAP GROUP ORD Put 3,200 308 n/a n/a n/a
2025-05-15 2025-03-31 13F ARCH CAP GROUP ORD Put 3,200 308 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.