Octave Specialty Group, Inc.
DE ˙ DB ˙ US0231398845
4,36 € ↑0,22 (5,31%)
2026-06-05
DEL PRIS
SecurityDE:FGPN / Octave Specialty Group, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership53,547 shares
Latest Disclosed Value $ 248,985
Rhumbline Advisers reports 6.83% decrease in ownership of FGPN / Octave Specialty Group, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 53,547 shares of Octave Specialty Group, Inc. (DE:FGPN) valued at $200,266 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 57,471 shares of Octave Specialty Group, Inc.. This represents a change in shares of -6.83% during the quarter. The current value of the position is $233,465 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 OCTAVE SPECIALTY GROUP COM 023139884 53,547 -3,924 -6.83 249 -44.52 0.0002
2026-02-13 2025-12-31 13F OCTAVE SPECIALTY GROUP COM 023139884 57,471 -9,699 -14.44 447 -20.18 0.0004
2025-11-06 2025-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 67,170 -7,746 -10.34 560 5.46 0.0004
2025-08-12 2025-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 74,916 5,376 7.73 532 -12.66 0.0005
2025-05-29 2025-03-31 13F/A-1 AMBAC FINL GROUP INC COM COM 023139884 69,540 -71,459 -50.68 608 -65.90 0.0006
2025-04-08 2025-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 69,540 -71,459 608 0.0006
2025-05-29 2024-12-31 13F/A-1 AMBAC FINL GROUP INC COM COM 023139884 140,999 8,495 6.41 1,784 20.07 0.0016
2025-01-30 2024-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 140,999 8,495 1,784 0.0016
2024-11-12 2024-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 132,504 626 0.47 1,485 -12.13 0.0013
2024-08-01 2024-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 131,878 -2,571 -1.91 1,691 -19.56 0.0016
2024-05-09 2024-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 134,449 -796 -0.59 2,101 -5.70 0.0020
2024-02-08 2023-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 135,245 -10,210 -7.02 2,229 27.02 0.0023
2023-11-09 2023-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 145,455 -3,077 -2.07 1,754 -17.07 0.0020
2023-08-08 2023-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 148,532 916 0.62 2,115 105,650.00 0.0024
2023-05-11 2023-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 147,616 6,638 4.71 2 -99.92 0.0028
2023-02-14 2022-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 140,978 1,771 1.27 2,459 38.54 0.0033
2022-11-10 2022-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 139,207 4,820 3.59 1,775 16.39 0.0026
2022-08-11 2022-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 134,387 3,074 2.34 1,525 11.64 0.0022
2022-05-12 2022-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 131,313 -458 -0.35 1,366 -35.41 0.0018
2022-02-10 2021-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 131,771 2,381 1.84 2,115 14.14 0.0026
2021-11-12 2021-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 129,390 -17,198 -11.73 1,853 -19.29 0.0025
2021-08-05 2021-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 146,588 -6,574 -4.29 2,296 -10.45 0.0030
2021-05-06 2021-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 153,162 839 0.55 2,564 9.43 0.0035
2021-02-10 2020-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 152,323 11,671 8.30 2,343 30.46 0.0032
2020-11-12 2020-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 140,652 -9,261 -6.18 1,796 -16.35 0.0028
2020-08-13 2020-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 149,913 -14,081 -8.59 2,147 6.08 0.0036
2020-05-06 2020-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 163,994 9,356 6.05 2,024 -39.33 0.0042
2020-02-05 2019-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 154,638 8,842 6.06 3,336 17.05 0.0056
2019-10-23 2019-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 145,796 9,440 6.92 2,850 24.02 0.0052
2019-08-14 2019-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 136,356 4,227 3.20 2,298 -4.01 0.0043
2019-05-01 2019-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 132,129 1,320 1.01 2,394 6.16 0.0046
2019-01-31 2018-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 130,809 22,519 20.80 2,255 1.99 0.0049
2018-11-07 2018-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 108,290 -35 -0.03 2,211 2.84 0.0043
2018-08-06 2018-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 108,325 63,529 141.82 2,150 206.27 0.0043
2018-05-02 2018-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 44,796 -1,701 -3.66 702 -5.52 0.0015
2018-02-09 2017-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 46,497 -7,620 -14.08 743 -20.45 0.0015
2017-11-06 2017-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 54,117 365 0.68 934 0.11 0.0020
2017-08-02 2017-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 53,752 -555 -1.02 933 -8.89 0.0021
2017-05-02 2017-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 54,307 876 1.64 1,024 -14.81 0.0024
2017-01-27 2016-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 53,431 -701 -1.29 1,202 20.80 0.0030
2016-11-08 2016-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 54,132 670 1.25 995 13.07 0.0027
2016-08-11 2016-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 53,462 -10,524 -16.45 880 -12.96 0.0026
2016-05-02 2016-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 63,986 6,060 10.46 1,011 23.90 0.0031
2016-02-03 2015-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 57,926 1,700 3.02 816 0.25 0.0026
2015-11-04 2015-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 56,226 3,040 5.72 814 -8.02 0.0028
2015-08-04 2015-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 53,186 -4,950 -8.51 885 -37.10 0.0028
2015-05-12 2015-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 58,136 400 0.69 1,407 -0.57 0.0041
2015-02-06 2014-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 57,736 2,800 5.10 1,415 16.56 0.0041
2014-11-12 2014-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 54,936 -940 -1.68 1,214 -20.45 0.0036
2014-08-06 2014-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 55,876 4,797 9.39 1,526 -3.72 0.0045
2014-05-06 2014-03-31 13F AMBAC FINL GROUP INC COM COM 023139884 51,079 -2,350 -4.40 1,585 20.81 0.0047
2014-02-03 2013-12-31 13F AMBAC FINL GROUP INC COM COM 023139884 53,429 -4,190 -7.27 1,312 25.55 0.0039
2013-11-05 2013-09-30 13F AMBAC FINL GROUP INC COM COM 023139884 57,619 399 0.70 1,045 -23.39 0.0032
2013-08-07 2013-06-30 13F AMBAC FINL GROUP INC COM COM 023139884 57,220 57,220 1,364 0.0044
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.