Octave Specialty Group, Inc.
US ˙ NYSE ˙ US0231398845

SecurityOSG / Octave Specialty Group, Inc.
InstitutionWolverine Trading, Llc
Latest Disclosed Ownership21,298 shares
Latest Disclosed Value $ 207,017
Wolverine Trading, Llc ownership in OSG / Octave Specialty Group, Inc.

On November 14, 2025 - Wolverine Trading, Llc filed a 13F-HR form disclosing ownership of 21,298 shares of Octave Specialty Group, Inc. (US:OSG) valued at $207,017 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 18, 2025 disclosing 0 shares of Octave Specialty Group, Inc.. The current value of the position is $110,111 USD.

Wolverine Trading, Llc has a history of taking positions in derivatives of the underlying security (OSG) in the form of stock options. The firm currently holds call options representing 95,000 of underlying shares valued at $923,400 USD and put options representing 25,700 of underlying shares valued at $249,804 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.

OSG / Octave Specialty Group, Inc. 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)
2025-11-14 2025-09-30 13F AMBAC FINL GROUP COM NEW 023139884 21,298 21,298 207 0.0001
2025-08-18 2025-06-30 13F AMBAC FINL GROUP COM NEW 023139884 0 -101,058 -100.00 0 -100.00
2025-05-15 2025-03-31 13F AMBAC FINL GROUP COM NEW 023139884 101,058 72,306 251.48 874 145.51 0.0010
2025-02-14 2024-12-31 13F AMBAC FINL GROUP COM NEW 023139884 28,752 28,752 357 0.0003
2024-08-14 2024-06-30 13F AMBAC FINL GROUP COM NEW 023139884 0 -26,301 -100.00 0 -100.00
2024-05-15 2024-03-31 13F AMBAC FINL GROUP COM NEW 023139884 26,301 -16,596 -38.69 411 -41.78 0.0004
2024-02-14 2023-12-31 13F AMBAC FINL GROUP COM NEW 023139884 42,897 42,897 707 0.0007
2023-11-15 2023-09-30 13F AMBAC FINL GROUP COM NEW 023139884 0 -155,878 -100.00 0 -100.00
2023-08-23 2023-06-30 13F AMBAC FINL GROUP COM NEW 023139884 155,878 155,878 2,174 0.0026
2022-11-14 2022-09-30 13F AMBAC FINL GROUP COM NEW 023139884 0 -169,360 -100.00 0 -100.00
2022-08-15 2022-06-30 13F AMBAC FINL GROUP COM NEW 023139884 169,360 157,668 1,348.51 1,880 1,578.57 0.0031
2022-05-16 2022-03-31 13F AMBAC FINL GROUP COM NEW 023139884 11,692 11,692 112 0.0001
2022-02-14 2021-12-31 13F AMBAC FINL GROUP COM NEW 023139884 0 -29,910 -100.00 0 -100.00
2021-11-12 2021-09-30 13F AMBAC FINL GROUP COM NEW 023139884 29,910 29,910 429 0.0005
2021-08-06 2021-06-30 13F AMBAC FINL GROUP COM NEW 023139884 0 -13,817 -100.00 0 -100.00
2021-05-14 2021-03-31 13F AMBAC FINL GROUP COM NEW 023139884 13,817 -8,746 -38.76 234 -31.78 0.0004
2021-02-12 2020-12-31 13F AMBAC FINL GROUP COM NEW 023139884 22,563 22,563 343 0.0005
2019-11-14 2019-09-30 13F AMBAC FINL GROUP COM NEW 023139884 0 -26,524 -100.00 0 -100.00
2019-08-20 2019-06-30 13F AMBAC FINL GROUP COM NEW 023139884 26,524 -5,193 -16.37 447 -22.26 0.0013
2019-05-15 2019-03-31 13F AMBAC FINL GROUP COM NEW 023139884 31,717 15,970 101.42 575 116.98 0.0017
2019-02-13 2018-12-31 13F AMBAC FINL GROUP COM NEW 023139884 15,747 -40,029 -71.77 265 -76.73 0.0008
2018-11-14 2018-09-30 13F AMBAC FINL GROUP COM NEW 023139884 55,776 -36,010 -39.23 1,139 -20.85 0.0025
2018-08-13 2018-06-30 13F AMBAC FINL GROUP COM NEW 023139884 91,786 0 0.00 1,439 0.00 0.0034
2018-05-15 2018-03-31 13F AMBAC FINL GROUP COM NEW 023139884 91,786 91,786 1,439 0.0034
2017-08-14 2017-06-30 13F AMBAC FINL GROUP COM NEW 023139884 0 -20,950 -100.00 0 -100.00
2017-05-15 2017-03-31 13F AMBAC FINL GROUP COM NEW 023139884 20,950 20,950 390 0.0021
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
(%)
2025-11-14 2025-09-30 13F AMBAC FINL GROUP COM NEW Call 95,000 923 n/a n/a n/a
2025-08-18 2025-06-30 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F AMBAC FINL GROUP COM NEW Call 365,200 186.21 3,159 99.49 n/a n/a n/a
2025-02-14 2024-12-31 13F AMBAC FINL GROUP COM NEW Call 127,600 544.44 1,584 613.06 n/a n/a n/a
2024-11-14 2024-09-30 13F AMBAC FINL GROUP COM NEW Call 19,800 -15.38 222 -25.75 n/a n/a n/a
2024-08-14 2024-06-30 13F AMBAC FINL GROUP COM NEW Call 23,400 -32.17 300 -44.53 n/a n/a n/a
2024-05-15 2024-03-31 13F AMBAC FINL GROUP COM NEW Call 34,500 539 n/a n/a n/a
2023-08-23 2023-06-30 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 n/a n/a n/a
2023-05-15 2023-03-31 13F AMBAC FINL GROUP COM NEW Call 13,900 0 n/a n/a n/a
2023-02-14 2022-12-31 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F AMBAC FINL GROUP COM NEW Call 40,400 -27.73 507 -18.23 n/a n/a n/a
2022-08-15 2022-06-30 13F AMBAC FINL GROUP COM NEW Call 55,900 5.27 620 22.29 n/a n/a n/a
2022-05-16 2022-03-31 13F AMBAC FINL GROUP COM NEW Call 53,100 507 n/a n/a n/a
2022-02-14 2021-12-31 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-12 2021-09-30 13F AMBAC FINL GROUP COM NEW Call 31,400 450 n/a n/a n/a
2021-08-06 2021-06-30 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-14 2021-03-31 13F AMBAC FINL GROUP COM NEW Call 33,000 -29.34 559 -21.27 n/a n/a n/a
2021-02-12 2020-12-31 13F AMBAC FINL GROUP COM NEW Call 46,700 710 n/a n/a n/a
2020-11-13 2020-09-30 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-08-13 2020-06-30 13F AMBAC FINL GROUP COM NEW Call 38,500 540 n/a n/a n/a
2020-02-12 2019-12-31 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-14 2019-09-30 13F AMBAC FINL GROUP COM NEW Call 10,600 -93.99 203 -93.17 n/a n/a n/a
2019-08-20 2019-06-30 13F AMBAC FINL GROUP COM NEW Call 176,500 69.55 2,974 57.69 n/a n/a n/a
2019-05-15 2019-03-31 13F AMBAC FINL GROUP COM NEW Call 104,100 47.24 1,886 58.35 n/a n/a n/a
2019-02-13 2018-12-31 13F AMBAC FINL GROUP COM NEW Call 70,700 -1.67 1,191 -18.87 n/a n/a n/a
2018-11-14 2018-09-30 13F AMBAC FINL GROUP COM NEW Call 71,900 -38.02 1,468 -19.30 n/a n/a n/a
2018-08-13 2018-06-30 13F AMBAC FINL GROUP COM NEW Call 116,000 0.00 1,819 0.00 n/a n/a n/a
2018-05-15 2018-03-31 13F AMBAC FINL GROUP COM NEW Call 116,000 1,819 n/a n/a n/a
2018-02-14 2017-12-31 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-11-15 2017-09-30 13F AMBAC FINL GROUP COM NEW Call 25,400 438 n/a n/a n/a
2017-08-14 2017-06-30 13F AMBAC FINL GROUP COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-05-15 2017-03-31 13F AMBAC FINL GROUP COM NEW Call 39,100 728 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
(%)
2025-11-14 2025-09-30 13F AMBAC FINL GROUP COM NEW Put 25,700 250 n/a n/a n/a
2025-08-18 2025-06-30 13F AMBAC FINL GROUP COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F AMBAC FINL GROUP COM NEW Put 80,800 699 n/a n/a n/a
2023-11-15 2023-09-30 13F AMBAC FINL GROUP COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-08-23 2023-06-30 13F AMBAC FINL GROUP COM NEW Put 203,700 2,842 n/a n/a n/a
2022-11-14 2022-09-30 13F AMBAC FINL GROUP COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F AMBAC FINL GROUP COM NEW Put 158,500 493.63 1,759 589.80 n/a n/a n/a
2022-05-16 2022-03-31 13F AMBAC FINL GROUP COM NEW Put 26,700 255 n/a n/a n/a
2022-02-14 2021-12-31 13F AMBAC FINL GROUP COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-12 2021-09-30 13F AMBAC FINL GROUP COM NEW Put 49,600 711 n/a n/a n/a
2021-08-06 2021-06-30 13F AMBAC FINL GROUP COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-14 2021-03-31 13F AMBAC FINL GROUP COM NEW Put 27,000 3.45 457 15.11 n/a n/a n/a
2021-02-12 2020-12-31 13F AMBAC FINL GROUP COM NEW Put 26,100 397 n/a n/a n/a
2019-11-14 2019-09-30 13F AMBAC FINL GROUP COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-08-20 2019-06-30 13F AMBAC FINL GROUP COM NEW Put 26,400 62.96 445 51.36 n/a n/a n/a
2019-05-15 2019-03-31 13F AMBAC FINL GROUP COM NEW Put 16,200 294 n/a n/a n/a
2019-02-13 2018-12-31 13F AMBAC FINL GROUP COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-11-14 2018-09-30 13F AMBAC FINL GROUP COM NEW Put 48,600 64.19 992 113.79 n/a n/a n/a
2018-08-13 2018-06-30 13F AMBAC FINL GROUP COM NEW Put 29,600 0.00 464 0.00 n/a n/a n/a
2018-05-15 2018-03-31 13F AMBAC FINL GROUP COM NEW Put 29,600 464 n/a n/a n/a
2018-02-14 2017-12-31 13F AMBAC FINL GROUP COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-11-15 2017-09-30 13F AMBAC FINL GROUP COM NEW Put 22,200 29.07 383 25.16 n/a n/a n/a
2017-08-14 2017-06-30 13F AMBAC FINL GROUP COM NEW Put 17,200 -43.97 306 -46.50 n/a n/a n/a
2017-05-15 2017-03-31 13F AMBAC FINL GROUP COM NEW Put 30,700 103.31 572 108.76 n/a n/a n/a
2016-11-14 2016-09-30 13F AMBAC FINL GROUP COM NEW Put 15,100 274 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.